fixed

- separated entities spriteset from primarymap, which only contains
  tiles
- fixed star obstacle

.gitignore

@@ -1 +1,2 @@
-openquell
+openquell*
+tmp

Makefile

@@ -1,3 +1,12 @@
+version   = $(shell egrep "version string = " config/static.go | cut -d'"' -f 2)
+BRANCH    = $(shell git branch --show-current)
+COMMIT    = $(shell git rev-parse --short=8 HEAD)
+BUILD     = $(shell date +%Y.%m.%d.%H%M%S) 
+#VERSION  := $(if $(filter $(BRANCH), development),$(version)-$(BRANCH)-$(COMMIT)-$(BUILD),$(version))
+VERSION := $(version)-$(BRANCH)-$(COMMIT)-$(BUILD)
+SHORTVERSION := $(version)-$(BRANCH)-$(COMMIT)
+LDFLAGS := -ldflags "-X 'openquell/config.VERSION=$(VERSION)'"
+
 all: clean build
 	@echo ok
 
@@ -5,8 +14,16 @@ clean:
 	rm -f openquell
 
 build:
-	go build
+	go build -ldflags "-X 'openquell/config.VERSION=$(VERSION)'"
 
+buildwasm:
+	env GOOS=js GOARCH=wasm go build -o openquell.wasm $(LDFLAGS) .
+
+zipwasm:
+	zip -r openquell-$(SHORTVERSION).zip index.html openquell.wasm wasm_exec.js
+
+wasm: buildwasm zipwasm
+	@ls -l openquell-$(SHORTVERSION).zip
 
 test:
-	@echo 1
+	@echo $(VERSION)

TODO.md

@@ -1,35 +1,51 @@
 ## Levels:
 
-- use first line as background image name
 - ignore comments in lvl files
-- check  when sphere bounces from  one end to the  other endlessly w/o
-  any solids in between. this is a game lock and equals game over
-- Start the game  end timer and add a score FIXME:  put the actual max
-  reachable score  into the  level definition  along with  the minimum
-  steps required to reach it, also add a step counter
 
 - Grid Observer:
   https://github.com/mlange-42/arche/issues/374
 
+- Add shaders for animation (player destruction etc)
 
-Screenshot:
+- Start New game starts with last played level, better add a Resume
+  Game menu item for this and use Start New always for level 1.
 
-Yes, since *ebiten.Image implements the standard image.Image interface
+- for finding caller:
-I just made a screenshot example (in Draw() function):
+	pc := make([]uintptr, 10)
-if inpututil.IsKeyJustPressed(ebiten.KeyS) {
+	n := runtime.Callers(0, pc)
-    f, err := os.Create("screenshot.png")
+	pc = pc[:n]
-    if err != nil {
+	fs := runtime.CallersFrames(pc)
-        log.Fatal("can't create file: ", err)
+	source, _ := fs.Next()
-    }
+	source, _ = fs.Next()
-    png.Encode(f, screen)
+	source, _ = fs.Next()
-}
 
+	slog.Debug("get observer", "minmoves", observer.LevelScore,
+		"file", source.File, "line", source.Line)
 
-- Add some final message when the player reaches the last level, start
+- Turn menu button in hud_system (events in level_scene!) into ebitenui button
-  from scratch or a message to buy me some beer, whatever
 
-- Calculate obstacle collision the same as solid collision with future
+- Obstacle don't stop at collectibles
-  velocity and  included snap in so  that the player ends  up right on
-  the edge of the obstacle and not inside as it is now
 
-- Check player-player collisions! 
+-  Player can  collect collectible  hidden under  obstacle (should  be
+  fixed when above is fixed)
+  
+- Remove Sprite from Tile{}, not used anymore
+
+## Collider Rework [abandoned: see branch collider-system, fails]
+
+- do not use the map anymore for collision detection
+- central collision_system
+- add Collider component with callback funcs to call on certain events
+- callback types:
+  - rect intersect (== future collision)
+  - collision resolve (set new position)
+  - pass over foreign rect (to e.g. change sprite while flying over sprite)
+  - pass over done (switch sprite)
+- check  for all  moving objects against  non-moving ones  like moving
+  obstacle, player, bullet, laser
+- check if executing callbacks within query loop is allowed
+- callback  function needs to be  able to modify other  components, so
+  possibly use observers for them, e.g.:
+  Collider.IntersectResolve => func(newpos) {player.pos = newpos; player.vel = stop}
+- in the end it must be  possible to add new entities without the need
+  to write a collision check for them, but have collision detection anyway!

assets/levels/00-deadly-obstacles.lvl

@@ -1,10 +1,11 @@
-Description: test obstacles
+Description: open the door
+MinMoves: 2
 Background: background-lila
                     
                     
                     
    #######          
-   #     #          
+   #o    #          
    #  t  #          
    #> S <#          
    #     #          

assets/levels/01-friendly-obstacles.lvl

@@ -1,14 +1,15 @@
 Description: test obstacles
+MinMoves: 14
 Background: background-lila
                     
                     
                     
    #############    
-   #           #    
+   #     t     #    
    #>  S #     #    
-   #    >#    >#    
+   #    >#    ^#    
-   #<    #     #    
+   #<    #W#####    
-   #    v#    <#    
+   # o  v#    o#    
    #############    
                     
                     

assets/levels/02-start.lvl

@@ -1,4 +1,5 @@
-Description: find the fruit
+Description: collect all yellow dots
+MinMoves: 7
 Background: background-lila
                     
                     

assets/levels/03-own.lvl

@@ -1,17 +1,18 @@
-Description: win
+Description: some enemies can be moved
+MinMoves: 5
 Background: background-lila
                     
                     
                     
                     
      ########       
-     #v o   #       
+     #  o <o#       
-     #  S<# #       
+     #v S # #       
      # #### #       
                     
                     
      # #### #       
      #      #       
-     #>    ^#       
+     #     ^#       
      ########       
                     

assets/levels/04-mayhem.lvl

@@ -1,16 +1,17 @@
-Description: use multiple players
+Description: the more players the better
+MinMoves: 4
 Background: background-lila
                     
                     
                     
                     
-     ##########     
+     ########W#     
     #         v#    
     #          #    
     #S        s#    
-    #          #    
+    ############    
-    #^         #    
+    # o        #    
-     ##########     
+     ######## #     
                     
                     
                     

assets/levels/05-space.lvl

@@ -0,0 +1,18 @@
+Description: don't fall off the world
+MinMoves: 3
+Background: background-lila
+                    
+                    
+                    
+                    
+        W           
+                    
+                    
+        S      # o  
+                    
+                    
+                    
+                    
+        o           
+                #   
+                    

assets/loader-levels.go

@@ -1,22 +1,17 @@
 package assets
 
 import (
-	"bufio"
 	_ "image/png"
-	"io/fs"
 	"log"
-	"log/slog"
 	"openquell/config"
 	"openquell/util"
-	"os"
-	"path/filepath"
-	"sort"
 	"strings"
 
 	"github.com/hajimehoshi/ebiten/v2"
+	"github.com/solarlune/ldtkgo"
 )
 
-var Levels = LoadLevels("levels")
+var Project = LoadLDTK("levels")
 var Tiles = InitTiles()
 
 // Tile:  contains  image, identifier  (as  used  in level  data)  and
@@ -25,18 +20,46 @@ type Tile struct {
 	Id          byte
 	Sprite      *ebiten.Image
 	Class       string
-	Solid       bool
+	Solid       bool            // wall brick
-	Player      bool
+	Player      bool            // player sphere
-	IsPrimary   bool
+	IsPrimary   bool            // primary player sphere
-	Renderable  bool
+	Renderable  bool            // visible, has sprite
-	Velocity    bool
+	Velocity    bool            // movable
-	Collectible bool
+	Collectible bool            // collectible, vanishes once collected
-	Transient   bool
+	Transient   bool            // turns into brick wall when traversed
-	Particle    int // -1=unused, 0-3 = show image of slice
+	Destroyable bool            // turns into empty floor when bumped into twice
-	Tiles       []*ebiten.Image
+	Particle    int             // -1=unused, 0-3 = show image of slice
-	TileNames   []string // same thing, only the names
+	Tiles       []*ebiten.Image // has N sprites
-	Obstacle    bool
+	TileNames   []string        // same thing, only the names
-	Direction   int // obstacles
+	Obstacle    bool            // is an obstacle/enemy
+	Direction   int             // obstacle business end shows into this direction
+	Shader      *ebiten.Shader
+	Alpha       *ebiten.Image
+}
+
+func (tile *Tile) Clone() *Tile {
+	newtile := &Tile{
+		Id:          tile.Id,
+		Sprite:      tile.Sprite,
+		Class:       tile.Class,
+		Solid:       tile.Solid,
+		Player:      tile.Player,
+		IsPrimary:   tile.IsPrimary,
+		Renderable:  tile.Renderable,
+		Velocity:    tile.Velocity,
+		Collectible: tile.Collectible,
+		Transient:   tile.Transient,
+		Destroyable: tile.Destroyable,
+		Particle:    tile.Particle,
+		Tiles:       tile.Tiles,
+		TileNames:   tile.TileNames,
+		Obstacle:    tile.Obstacle,
+		Direction:   tile.Direction,
+		Alpha:       tile.Alpha,
+		Shader:      tile.Shader,
+	}
+
+	return newtile
 }
 
 const (
@@ -128,7 +151,7 @@ func NewTileTranswall(class []string) *Tile {
 	}
 
 	return &Tile{
-		Id:         '*',
+		Id:         't',
 		Class:      "transwall",
 		Solid:      false,
 		Renderable: true,
@@ -139,123 +162,105 @@ func NewTileTranswall(class []string) *Tile {
 	}
 }
 
-// used to map level data bytes to actual tiles
+func NewTileHiddenDoor(class, alpha string) *Tile {
-type TileRegistry map[byte]*Tile
+	return &Tile{
-
+		Id:          'W',
-// holds a raw level spec:
+		Class:       "hiddendoor",
-//
+		Solid:       false,
-// Name:        the name of the level file w/o the .lvl extension
+		Renderable:  true,
-// Background:  an image name used as game background for this level
+		Destroyable: true,
-// Description: text to display on top
+		Sprite:      Assets[class],
-// Data:        a level spec consisting of chars of the above mapping and spaces, e.g.:
+		Alpha:       Assets[alpha],
-// ####
+		Shader:      Shaders["destruct"],
-// #  #
+	}
-// ####
-//
-// Each level data must be 20 chars wide (= 640 px width) and 15 chars
-// high (=480 px height).
-type RawLevel struct {
-	Name        string
-	Description string
-	Background  *ebiten.Image
-	Data        []byte
 }
 
+// used to map level data bytes to actual tiles
+type TileRegistry map[string]*Tile
+
 func InitTiles() TileRegistry {
 	return TileRegistry{
-		' ': {Id: ' ', Class: "floor", Renderable: false},
+		"floor":           {Id: ' ', Class: "floor", Renderable: false},
-		'#': NewTileBlock("block-grey32"),
+		"default":         NewTileBlock("block-greycolored"),
-		'B': NewTileBlock("block-orange-32"),
+		"solidorange":     NewTileBlock("block-orange-32"),
-		'S': NewTilePlayer(Primary),
+		"PlayerPrimary":   NewTilePlayer(Primary),
-		's': NewTilePlayer(Secondary),
+		"PlayerSecondary": NewTilePlayer(Secondary),
-		'o': NewTileCollectible("collectible-orange"),
+		"Collectible":     NewTileCollectible("collectible-orange"),
-		'+': NewTileObstacle("obstacle-star", config.All),
+		"ObstacleStar":    NewTileObstacle("obstacle-star", config.All),
-		'^': NewTileObstacle("obstacle-north", config.North),
+		"ObstacleNorth":   NewTileObstacle("obstacle-north", config.North),
-		'v': NewTileObstacle("obstacle-south", config.South),
+		"ObstacleSouth":   NewTileObstacle("obstacle-south", config.South),
-		'<': NewTileObstacle("obstacle-west", config.West),
+		"ObstacleWest":    NewTileObstacle("obstacle-west", config.West),
-		'>': NewTileObstacle("obstacle-east", config.East),
+		"ObstacleEast":    NewTileObstacle("obstacle-east", config.East),
-		'*': NewTileParticle([]string{
+		"Particle": NewTileParticle([]string{
-			//"particle-ring-1",
+			"particle-ring-1",
 			"particle-ring-2",
 			"particle-ring-3",
 			"particle-ring-4",
 			"particle-ring-5",
 			"particle-ring-6",
 		}),
-		't': NewTileTranswall([]string{"transwall", "block-orange-32"}),
+		"Transient":    NewTileTranswall([]string{"transwall", "block-orange-32"}),
+		"HiddenDoor":   NewTileHiddenDoor("block-greycolored", "damage"),
+		"HiddenDoor2":  NewTileHiddenDoor("block-greycolored", "damage"),
+		"HiddenDoor3":  NewTileHiddenDoor("block-greycolored", "damage"),
+		"HiddenDoor4":  NewTileHiddenDoor("block-greycolored", "damage"),
+		"HiddenDoor5":  NewTileHiddenDoor("block-greycolored", "damage"),
+		"HiddenDoor6":  NewTileHiddenDoor("block-greycolored", "damage"),
+		"HiddenDoor7":  NewTileHiddenDoor("block-greycolored", "damage"),
+		"HiddenDoor8":  NewTileHiddenDoor("block-greycolored", "damage"),
+		"HiddenDoor9":  NewTileHiddenDoor("block-greycolored", "damage"),
+		"HiddenDoor10": NewTileHiddenDoor("block-greycolored", "damage"),
+		"HiddenDoor11": NewTileHiddenDoor("block-greycolored", "damage"),
+		"HiddenDoor12": NewTileHiddenDoor("block-greycolored", "damage"),
+		"HiddenDoor13": NewTileHiddenDoor("block-greycolored", "damage"),
 	}
 }
 
-// load levels at compile time into ram, creates a slice of raw levels
+// load LDTK project at compile time into ram
-func LoadLevels(dir string) []RawLevel {
+func LoadLDTK(dir string) *ldtkgo.Project {
-	levels := []RawLevel{}
+	fd, err := assetfs.Open("levels/openquell.ldtk")
-
-	// we use embed.FS to iterate over all files in ./levels/
-	entries, err := assetfs.ReadDir(dir)
 	if err != nil {
-		log.Fatalf("failed to read level dir %s: %s", dir, err)
+		log.Fatalf("failed to open LDTK file levels/openquell.ldtk: %s", err)
-	}
-
-	sort.Slice(entries, func(i, j int) bool {
-		return entries[i].Name() < entries[j].Name()
-	})
-
-	for _, levelfile := range entries {
-		if levelfile.Type().IsRegular() && strings.Contains(levelfile.Name(), ".lvl") {
-			path := filepath.Join("assets", dir)
-			level := ParseRawLevel(path, levelfile)
-
-			levels = append(levels, level)
-
-			slog.Debug("loaded level", "path", path, "file", levelfile)
-		}
-	}
-
-	return levels
-}
-
-func ParseRawLevel(dir string, levelfile fs.DirEntry) RawLevel {
-	fd, err := os.Open(filepath.Join(dir, levelfile.Name()))
-	if err != nil {
-		log.Fatalf("failed to read level file %s: %s", levelfile.Name(), err)
 	}
 	defer fd.Close()
 
-	name := strings.TrimSuffix(levelfile.Name(), ".lvl")
+	fileinfo, err := fd.Stat()
-	des := ""
+	if err != nil {
-	background := &ebiten.Image{}
+		log.Fatalf("failed to stat() LDTK file levels/openquell.ldtk: %s", err)
-	data := []byte{}
+	}
 
-	scanner := bufio.NewScanner(fd)
+	filesize := fileinfo.Size()
-	for scanner.Scan() {
+	buffer := make([]byte, filesize)
-		// ignore any whitespace
-		line := scanner.Text()
 
-		// ignore empty lines
+	_, err = fd.Read(buffer)
-		if len(line) == 0 {
+	if err != nil {
-			continue
+		log.Fatalf("failed to read bytes from LDTK file levels/openquell.ldtk: %s", err)
-		}
+	}
 
-		switch {
+	project, err := ldtkgo.Read(buffer)
-		case strings.Contains(line, "Background:"):
+	if err != nil {
-			haveit := strings.Split(line, ": ")
+		panic(err)
-			if util.Exists(Assets, haveit[1]) {
+	}
-				background = Assets[haveit[1]]
+
+	// do some sanity checks
+	properties := []string{"minmoves", "background", "level", "description"}
+	need := len(properties)
+
+	for idx, level := range project.Levels {
+		have := 0
+
+		for _, property := range level.Properties {
+			if util.Contains(properties, property.Identifier) {
+				have++
 			}
-		case strings.Contains(line, "Description:"):
+		}
-			haveit := strings.Split(line, ": ")
+
-			des = haveit[1]
+		if have != need {
-		default:
+			log.Fatalf("level definition for level %d (%s) invalid: %d missing properties\n   required: %s",
-			// all other  non-empty and  non-equalsign lines  are
+				idx, level.Identifier, need-have, strings.Join(properties, ", "),
-			// level definition matrix data, merge thes into data
+			)
-			data = append(data, line+"\n"...)
 		}
 	}
 
-	return RawLevel{
+	return project
-		Name:        name,
-		Data:        data,
-		Background:  background,
-		Description: des,
-	}
 }

assets/loader-shaders.go

@@ -0,0 +1,49 @@
+package assets
+
+import (
+	"bytes"
+	"log"
+	"log/slog"
+	"path/filepath"
+	"strings"
+
+	"github.com/hajimehoshi/ebiten/v2"
+)
+
+type ShaderRegistry map[string]*ebiten.Shader
+
+var Shaders = LoadShaders("shaders")
+
+func LoadShaders(dir string) ShaderRegistry {
+	shaders := ShaderRegistry{}
+
+	entries, err := assetfs.ReadDir(dir)
+	if err != nil {
+		log.Fatalf("failed to read shaders dir %s: %s", dir, err)
+	}
+
+	for _, file := range entries {
+		path := filepath.Join(dir, file.Name())
+		fd, err := assetfs.Open(path)
+		if err != nil {
+			log.Fatalf("failed to open shader file %s: %s", file.Name(), err)
+		}
+		defer fd.Close()
+
+		name := strings.TrimSuffix(file.Name(), ".kg")
+
+		buf := new(bytes.Buffer)
+		buf.ReadFrom(fd)
+
+		shader, err := ebiten.NewShader([]byte(buf.Bytes()))
+		if err != nil {
+			log.Fatal(err)
+		}
+
+		shaders[name] = shader
+
+		slog.Debug("loaded shader asset", "path", path)
+	}
+
+	return shaders
+}

assets/loader-sprites.go

@@ -6,7 +6,6 @@ import (
 	_ "image/png"
 	"log"
 	"log/slog"
-	"os"
 	"path/filepath"
 	"strings"
 
@@ -16,7 +15,7 @@ import (
 // Maps image name to image data
 type AssetRegistry map[string]*ebiten.Image
 
-//go:embed levels/*.lvl sprites/*.png fonts/*.ttf
+//go:embed sprites/*.png fonts/*.ttf levels/*.ldtk shaders/*.kg
 var assetfs embed.FS
 
 var Assets = LoadImages("sprites")
@@ -31,8 +30,8 @@ func LoadImages(dir string) AssetRegistry {
 	}
 
 	for _, imagefile := range entries {
-		path := filepath.Join("assets", dir, imagefile.Name())
+		path := filepath.Join(dir, imagefile.Name())
-		fd, err := os.Open(path)
+		fd, err := assetfs.Open(path)
 		if err != nil {
 			log.Fatalf("failed to open image file %s: %s", imagefile.Name(), err)
 		}

assets/shaders/destruct.kg

@@ -0,0 +1,36 @@
+// Copyright 2020 The Ebiten Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+//go:build ignore
+
+//kage:unit pixels
+
+package main
+
+var Damaged int
+
+const HP float = 0
+
+func Fragment(_ vec4, texCoord vec2, _ vec4) vec4 {
+	wallpx := imageSrc0At(texCoord) // A pixel from the wall tile
+	mask := imageSrc1At(texCoord)   // A pixel from the damage mask image
+
+	if Damaged == 1 && (wallpx.a != 0.0 && mask.a != 0.0) {
+		alpha := clamp(HP+(1.0-mask.a), 0.0, 1.0)
+		// Create a darker pixel if it's inside a damage mask.
+		return vec4(wallpx.r*alpha, wallpx.g*alpha, wallpx.b*alpha, wallpx.a)
+	}
+
+	return wallpx // Otherwise, leave a pixel color as is
+}

assets/sprites/makemap.sh

@@ -0,0 +1,2 @@
+#!/bin/sh
+montage -tile 4x0 -geometry +0+0 block* collectible-orange.png obstacle-* sphere-blue* transwall.png map.png && okular map.png

components/components.go

@@ -7,7 +7,10 @@ import (
 // virtual location, aka tile address
 
 type Renderable struct {
-	Image *ebiten.Image
+	Image       *ebiten.Image
+	DamageImage *ebiten.Image
+	Damaged     int
+	Shader      *ebiten.Shader
 }
 
 type Particle struct {
@@ -16,10 +19,6 @@ type Particle struct {
 	Tiles []*ebiten.Image
 }
 
-type Speed struct {
-	Value int
-}
-
 // only tile entities will have those
 type Tilish struct{}
 type Solid struct{}

components/destroyable.go

@@ -0,0 +1,29 @@
+package components
+
+import (
+	"log"
+
+	"github.com/hajimehoshi/ebiten/v2"
+)
+
+// A hidden door in a wall. If the player bumps into it once, it shows
+// damage and it vanishes the next time.
+
+type Destroyable struct {
+	Activated bool
+	Sprites   []*ebiten.Image
+	Current   int // sprite index
+}
+
+func (door *Destroyable) GetNext() *ebiten.Image {
+	if len(door.Sprites) > door.Current {
+		door.Current++
+		return door.Sprites[door.Current]
+	}
+
+	log.Fatalf("not enough sprites in transient tile, have %d sprites, index requested: %d",
+		len(door.Sprites), door.Current+1,
+	)
+
+	return nil
+}

components/player.go

@@ -5,6 +5,9 @@ import "github.com/hajimehoshi/ebiten/v2"
 type Player struct {
 	IsPrimary bool
 	Sprites   []*ebiten.Image
+	LoopPos   *Position
+	LoopStart bool
+	LoopCount int
 }
 
 func (player *Player) SwitchSprite() *ebiten.Image {

components/position.go

@@ -34,7 +34,8 @@ func NewPosition(point image.Point, cellsize int) *Position {
 
 func (position *Position) GetMoved(velosity *Velocity) *Position {
 	pos := &Position{}
-	pos.Update(position.X+velosity.Data.X, position.Y+velosity.Data.Y, position.Cellsize)
+	pos.Update(position.X+(velosity.Data.X*velosity.Speed),
+		position.Y+(velosity.Data.Y*velosity.Speed), position.Cellsize)
 
 	return pos
 }
@@ -70,13 +71,13 @@ func (position *Position) String() string {
 	)
 }
 
-func (position *Position) Move(velocity *Velocity, speed *Speed) {
+func (position *Position) Move(velocity *Velocity) {
 	// if velocity.Direction != 0 {
 	// 	slog.Debug("moving", "velocity", velocity, "speed", speed)
 	// }
 	position.Update(
-		position.X+(velocity.Data.X*speed.Value),
+		position.X+(velocity.Data.X*velocity.Speed),
-		position.Y+(velocity.Data.Y*speed.Value),
+		position.Y+(velocity.Data.Y*velocity.Speed),
 	)
 }
 
@@ -89,14 +90,7 @@ func (tile *Position) Intersects(moving *Position, velocity *Velocity) (bool, *P
 
 	is := tile.Rect.Bounds().Intersect(object.Rect.Bounds())
 	if is != image.ZR {
-		/*
+
-			slog.Debug("Intersect",
-				"velocity", velocity.Data,
-				"player", moving.Rect,
-				"moved player", object.Rect,
-				"collision at", is,
-			)
-		*/
 		// collision, snap into neighbouring tile depending on the direction
 		switch velocity.Direction {
 		case West:
@@ -109,6 +103,13 @@ func (tile *Position) Intersects(moving *Position, velocity *Velocity) (bool, *P
 			object.Update(tile.X, tile.Rect.Max.Y)
 		}
 
+		// slog.Debug("Intersect",
+		// 	"velocity", velocity.Data,
+		// 	"player", moving,
+		// 	"moved player", object,
+		// 	"collision at", is,
+		// 	"tilepos", tile,
+		// )
 		return true, object
 	}
 

components/velocity.go

@@ -9,6 +9,7 @@ type Velocity struct {
 	Data       Position
 	Direction  int
 	PointingAt int
+	Speed      int
 }
 
 func (velocity *Velocity) Set(new *Velocity) {
@@ -59,6 +60,8 @@ func (velocity *Velocity) InvertDirection() int {
 	case North:
 		return South
 	case All:
+		return All
+	case Stop:
 		return Stop
 	}
 

config/config.go

@@ -0,0 +1,77 @@
+package config
+
+import (
+	"fmt"
+	"os"
+	"strconv"
+	"strings"
+
+	"github.com/knadh/koanf"
+	"github.com/knadh/koanf/providers/env"
+	"github.com/knadh/koanf/providers/posflag"
+	flag "github.com/spf13/pflag"
+)
+
+const Usage string = `openquell [options]
+-t --tps  <ticks>      Set ticks per second, default 60.
+-d --debug             Enable debugging output.
+`
+
+type Config struct {
+	TPS        int    `koanf:"tps"`
+	Loglevel   string `koanf:"loglevel"`
+	Debug      bool   `koanf:"debug"` // loglevel=debug
+	Startlevel int
+}
+
+func InitConfig() (*Config, error) {
+	var kloader = koanf.New(".")
+
+	flagset := flag.NewFlagSet("config", flag.ContinueOnError)
+	flagset.BoolP("debug", "d", false, "enable debug log")
+
+	flagset.Usage = func() {
+		fmt.Println(Usage)
+		os.Exit(0)
+	}
+
+	flagset.IntP("tps", "t", 0, "TPS")
+
+	if err := flagset.Parse(os.Args[1:]); err != nil {
+		return nil, fmt.Errorf("failed to parse program arguments: %w", err)
+	}
+
+	if err := kloader.Load(env.Provider("OC_", ".", func(s string) string {
+		return strings.ReplaceAll(strings.ToLower(
+			strings.TrimPrefix(s, "OC_")), "_", ".")
+	}), nil); err != nil {
+		return nil, fmt.Errorf("error loading environment: %w", err)
+	}
+
+	if err := kloader.Load(posflag.Provider(flagset, ".", kloader), nil); err != nil {
+		return nil, fmt.Errorf("error loading flags: %w", err)
+	}
+
+	conf := &Config{}
+	if err := kloader.Unmarshal("", &conf); err != nil {
+		return nil, fmt.Errorf("error unmarshalling: %w", err)
+	}
+
+	switch conf.Loglevel {
+	case "debug":
+		conf.Debug = true
+	}
+
+	// are there any args left on commandline? if so threat them as adlinks
+	if len(flagset.Args()) > 0 {
+		level, err := strconv.Atoi(flagset.Args()[0])
+		if err != nil {
+			return nil, fmt.Errorf("failed to parse start level: %w", err)
+		}
+
+		conf.Startlevel = level
+	}
+
+	return conf, nil
+
+}

config/static.go

@@ -1,6 +1,8 @@
 package config
 
-import "time"
+import (
+	"time"
+)
 
 const (
 	Stop = iota
@@ -11,6 +13,13 @@ const (
 	All
 )
 
-const PLAYERSPEED int = 4
+const PLAYERSPEED int = 5
 const PARTICLE_LOOPWAIT time.Duration = 250 * time.Millisecond
 const LEVEL_END_WAIT time.Duration = 500 * time.Millisecond
+const version string = "1.2.1"
+
+const MenuRectX int = 600
+const MenuRectY int = 0
+const MenuRectCellsize int = 32
+
+var VERSION string // maintained by -x

game/about_scene.go

@@ -4,6 +4,7 @@ import (
 	"image/color"
 	"log/slog"
 	"openquell/assets"
+	"openquell/config"
 	"openquell/gameui"
 
 	"github.com/ebitenui/ebitenui"
@@ -27,7 +28,8 @@ Thomas von Dein <tom@vondein.org>.
 Download it on repo.daemon.de/openquell/.
 
 Copyright (c) 2024 by Thomas von Dein.
-`
+
+Version: `
 
 func NewAboutScene(game *Game) Scene {
 	scene := &AboutScene{Whoami: About, Game: game, Next: About}
@@ -81,7 +83,7 @@ func (scene *AboutScene) SetupUI() {
 	)
 
 	about := widget.NewText(
-		widget.TextOpts.Text(ABOUT, *assets.FontRenderer.FontNormal, blue),
+		widget.TextOpts.Text(ABOUT+config.VERSION, *assets.FontRenderer.FontNormal, blue),
 		widget.TextOpts.Position(widget.TextPositionStart, widget.TextPositionCenter),
 	)
 

game/game.go

@@ -4,6 +4,7 @@ import (
 	"fmt"
 	"image"
 	"log/slog"
+	"openquell/config"
 	"openquell/observers"
 
 	"github.com/hajimehoshi/ebiten/v2"
@@ -17,10 +18,11 @@ type Game struct {
 	Scenes                              map[SceneName]Scene
 	CurrentScene                        SceneName
 	Observer                            *observers.GameObserver
-	Levels                              []*Level // needed to feed select_scene
+	Levels                              []*Level // fed in PlayScene.GenerateLevels()
+	Config                              *config.Config
 }
 
-func NewGame(width, height, cellsize, startlevel int, startscene SceneName) *Game {
+func NewGame(width, height, cellsize int, cfg *config.Config, startscene SceneName) *Game {
 	world := ecs.NewWorld()
 
 	game := &Game{
@@ -30,18 +32,17 @@ func NewGame(width, height, cellsize, startlevel int, startscene SceneName) *Gam
 		ScreenHeight: height,
 		Scenes:       map[SceneName]Scene{},
 		Cellsize:     cellsize,
+		Config:       cfg,
 	}
 
-	observers.NewPlayerObserver(&world)
+	game.Observer = observers.NewGameObserver(
-	observers.NewParticleObserver(&world)
+		&world, cfg.Startlevel, width, height, cellsize)
-	observers.NewObstacleObserver(&world)
-	game.Observer = observers.NewGameObserver(&world, startlevel, width, height, cellsize)
 
 	game.Scenes[Welcome] = NewWelcomeScene(game)
 	game.Scenes[Menu] = NewMenuScene(game)
 	game.Scenes[About] = NewAboutScene(game)
 	game.Scenes[Popup] = NewPopupScene(game)
-	game.Scenes[Play] = NewLevelScene(game, startlevel)
+	game.Scenes[Play] = NewPlayScene(game, cfg.Startlevel)
 	game.Scenes[Select] = NewSelectScene(game)
 
 	game.CurrentScene = startscene
@@ -56,22 +57,18 @@ func (game *Game) GetCurrentScene() Scene {
 }
 
 func (game *Game) Update() error {
-	gameobserver := observers.GetGameObserver(game.World)
-
 	// handle level ends
-	timer := gameobserver.StopTimer
+	timer := game.Observer.StopTimer
 
 	if timer.IsReady() {
 		// a  level is either  lost or won,  we display a  small popup
 		// asking the user how to continue from here
 		timer.Reset()
 
-		slog.Debug("timer ready", "lost", gameobserver.Lost, "retry", gameobserver.Retry)
+		slog.Debug("timer ready", "lost", game.Observer.Lost, "retry", game.Observer.Retry)
-		if !gameobserver.Lost {
+		game.Observer.AddScore()
-			gameobserver.Score++ // FIXME: use level.Score(), see TODO
-		}
 
-		game.Scenes[Nextlevel] = NewNextlevelScene(game, gameobserver.Lost)
+		game.Scenes[Nextlevel] = NewNextlevelScene(game)
 		game.CurrentScene = Nextlevel
 	}
 
@@ -85,19 +82,19 @@ func (game *Game) Update() error {
 	}
 
 	next := scene.GetNext()
+
 	if next != game.CurrentScene {
 		if next == Play && game.CurrentScene == Nextlevel {
 			// switched from nextlevel (lost or won) popup to play (either retry or next level)
-			if !gameobserver.Retry {
+			if !game.Observer.Retry {
-				gameobserver.CurrentLevel++
+				game.Observer.CurrentLevel++
 			}
-			gameobserver.Retry = false
+			game.Observer.Retry = false
 		}
 
 		if next == Play {
 			// fresh setup of actual level every time we enter the play scene
-			//game.Scenes[Play] = NewLevelScene(game, gameobserver.CurrentLevel)
+			game.Scenes[Play].SetLevel(game.Observer.CurrentLevel)
-			game.Scenes[Play].SetLevel(gameobserver.CurrentLevel)
 		}
 
 		// make sure we stay on the selected scene
@@ -106,8 +103,8 @@ func (game *Game) Update() error {
 		// finally switch
 		game.CurrentScene = next
 
-		// FIXME: add some reset function to gameobserver for these kinds of things
+		// FIXME: add some reset function to game.Observer for these kinds of things
-		gameobserver.Lost = false
+		game.Observer.Lost = false
 	}
 
 	timer.Update()

game/level_scene.go

@@ -1,80 +0,0 @@
-package game
-
-import (
-	"log/slog"
-	"openquell/assets"
-
-	"github.com/hajimehoshi/ebiten/v2"
-)
-
-type LevelScene struct {
-	Game         *Game
-	CurrentLevel int
-	Levels       []*Level
-	Next         SceneName
-	Whoami       SceneName
-	UseCache     bool
-}
-
-// Implements the actual playing Scene
-func NewLevelScene(game *Game, startlevel int) Scene {
-	scene := &LevelScene{Whoami: Play, Next: Play, Game: game}
-
-	scene.GenerateLevels(game)
-	scene.SetLevel(startlevel)
-
-	return scene
-}
-
-func (scene *LevelScene) GenerateLevels(game *Game) {
-	for _, level := range assets.Levels {
-		scene.Levels = append(scene.Levels, NewLevel(game, 32, &level))
-	}
-
-	scene.Game.Levels = scene.Levels
-}
-
-func (scene *LevelScene) SetLevel(level int) {
-	scene.CurrentLevel = level
-	scene.Levels[scene.CurrentLevel].SetupGrid(scene.Game)
-}
-
-// Interface methods
-func (scene *LevelScene) SetNext(next SceneName) {
-	scene.Next = next
-}
-
-func (scene *LevelScene) GetNext() SceneName {
-	// FIXME: set to winner or options screen
-	return scene.Next
-}
-
-func (scene *LevelScene) ResetNext() {
-	scene.Next = scene.Whoami
-}
-
-func (scene *LevelScene) Clearscreen() bool {
-	return false
-}
-
-func (scene *LevelScene) Update() error {
-	scene.Levels[scene.CurrentLevel].Update()
-
-	switch {
-	case ebiten.IsKeyPressed(ebiten.KeyEscape):
-		scene.SetNext(Popup)
-	}
-
-	return nil
-}
-
-func (scene *LevelScene) Draw(screen *ebiten.Image) {
-	if scene.CurrentLevel != scene.Game.Observer.CurrentLevel {
-		slog.Debug("level", "current", scene.CurrentLevel,
-			"next", scene.Game.Observer.CurrentLevel)
-		scene.CurrentLevel = scene.Game.Observer.CurrentLevel
-		scene.Levels[scene.CurrentLevel].SetupGrid(scene.Game)
-	}
-	screen.Clear()
-	scene.Levels[scene.CurrentLevel].Draw(screen)
-}

game/levels.go

@@ -2,59 +2,75 @@ package game
 
 import (
 	"image"
-	"log"
+	"log/slog"
 	"openquell/assets"
 	"openquell/components"
 	"openquell/grid"
 	"openquell/observers"
 	"openquell/systems"
-	"openquell/util"
 	"strings"
 
 	"github.com/hajimehoshi/ebiten/v2"
 	"github.com/mlange-42/arche/ecs"
+	"github.com/solarlune/ldtkgo"
 )
 
+type Map map[image.Point]*assets.Tile
+type BackupMap map[image.Point]assets.Tile
+
 type Level struct {
 	Cellsize, Width, Height int
 	World                   *ecs.World
 	Name                    string
 	Description             string
-	Mapslice                map[image.Point]*assets.Tile
+	Number                  int
+	Mapslice                Map
+	BackupMapslice          Map
 	GridContainer           *grid.GridContainer
 	Systems                 []systems.System
 	Grid                    *grid.Grid
 }
 
-func NewLevel(game *Game, cellsize int, plan *assets.RawLevel) *Level {
+func NewLevel(game *Game, cellsize int, plan *ldtkgo.Level) *Level {
 	systemlist := []systems.System{}
 
 	gridcontainer := &grid.GridContainer{}
 
+	// FIXME: use plan.BGImage.Path here?
 	systemlist = append(systemlist,
-		systems.NewGridSystem(game.World, game.ScreenWidth, game.ScreenHeight, cellsize, plan.Background))
+		systems.NewGridSystem(game.World, game.ScreenWidth, game.ScreenHeight, cellsize,
+			assets.Assets[plan.PropertyByIdentifier("background").AsString()]))
 
 	systemlist = append(systemlist, systems.NewCollectibleSystem(game.World))
 
+	systemlist = append(systemlist, systems.NewObstacleSystem(game.World, gridcontainer))
+
 	systemlist = append(systemlist,
-		systems.NewPlayerSystem(game.World, gridcontainer))
+		systems.NewPlayerSystem(game.World, gridcontainer, game.ScreenWidth, game.ScreenHeight))
 
 	systemlist = append(systemlist, systems.NewParticleSystem(game.World, game.Cellsize))
 
-	systemlist = append(systemlist, systems.NewObstacleSystem(game.World, gridcontainer))
-
 	systemlist = append(systemlist, systems.NewTransientSystem(game.World, gridcontainer))
 
+	systemlist = append(systemlist, systems.NewDestroyableSystem(game.World, gridcontainer,
+		game.Cellsize))
+
+	systemlist = append(systemlist, systems.NewHudSystem(game.World, plan))
+
+	mapslice, backupmap := LevelToSlice(game, plan, cellsize)
+
 	return &Level{
-		Mapslice:      LevelToSlice(game, plan, cellsize),
+		Mapslice:       mapslice,
-		Cellsize:      cellsize,
+		BackupMapslice: backupmap,
-		World:         game.World,
+		Cellsize:       cellsize,
-		Width:         game.ScreenWidth,
+		World:          game.World,
-		Height:        game.ScreenHeight,
+		Width:          game.ScreenWidth,
-		Description:   plan.Description,
+		Height:         game.ScreenHeight,
-		Name:          plan.Name,
+		Description:    plan.PropertyByIdentifier("description").AsString(),
-		GridContainer: gridcontainer,
+		Number:         plan.PropertyByIdentifier("level").AsInt(),
-		Systems:       systemlist,
+		Name:           strings.ReplaceAll(plan.Identifier, "_", " "),
+		GridContainer:  gridcontainer,
+		Systems:        systemlist,
 	}
 }
 
@@ -70,10 +86,9 @@ func (level *Level) Draw(screen *ebiten.Image) {
 	}
 }
 
-func (level *Level) Position2Point(position *components.Position) image.Point {
+func (level *Level) RestoreMap() {
-	return image.Point{
+	for point, tile := range level.BackupMapslice {
-		int(position.X) / level.Cellsize,
+		level.Mapslice[point] = tile.Clone()
-		int(position.Y) / level.Cellsize,
 	}
 }
 
@@ -89,33 +104,91 @@ func (level *Level) SetupGrid(game *Game) {
 	level.World.Batch().RemoveEntities(selector)
 
 	// get rid of any players on PlayerObserver. FIXME: remove them in grid.NewGrid()?
-	playerobserver := observers.GetPlayerObserver(level.World)
+	observer := observers.GetGameObserver(level.World)
-	playerobserver.RemoveEntities()
+	observer.RemoveEntities()
+
+	// get rid of possibly manipulated map
+	level.RestoreMap()
 
 	// setup world
+	slog.Debug("new grid?")
 	level.GridContainer.SetGrid(
 		grid.NewGrid(game.World, level.Cellsize, level.Width, level.Height, level.Mapslice))
 }
 
-// parses a RawLevel and generates a mapslice from it, which is being used as grid
+func NewMapSlice(game *Game, tilesize int) Map {
-func LevelToSlice(game *Game, level *assets.RawLevel, tilesize int) map[image.Point]*assets.Tile {
 	size := game.ScreenWidth * game.ScreenHeight
-	mapslice := make(map[image.Point]*assets.Tile, size)
+	mapslice := make(Map, size)
 
-	for y, line := range strings.Split(string(level.Data), "\n") {
+	for y := 0; y < game.ScreenHeight; y += 32 {
-		if len(line) != game.ScreenWidth/tilesize && y < game.ScreenHeight/tilesize {
+		for x := 0; x < game.ScreenWidth; x += 32 {
-			log.Fatalf("line %d doesn't contain %d tiles, but %d",
+			mapslice[image.Point{x / tilesize, y / tilesize}] = assets.Tiles["floor"]
-				y, game.ScreenWidth/tilesize, len(line))
-		}
-
-		for x, char := range line {
-			if !util.Exists(assets.Tiles, byte(char)) {
-				log.Fatalf("unregistered tile type %c encountered", char)
-			}
-
-			mapslice[image.Point{x, y}] = assets.Tiles[byte(char)]
 		}
 	}
 
 	return mapslice
 }
+
+// parses a RawLevel and generates a mapslice from it, which is being used as grid
+func LevelToSlice(game *Game, level *ldtkgo.Level, tilesize int) (Map, Map) {
+	mapslice := NewMapSlice(game, tilesize)
+	backupmap := NewMapSlice(game, tilesize)
+
+	for _, layer := range level.Layers {
+		switch layer.Type {
+		case ldtkgo.LayerTypeTile:
+			// load tile from LDTK tile layer, use sprites from associated map.
+
+			if tiles := layer.AllTiles(); len(tiles) > 0 {
+				for _, tileData := range tiles {
+					// Subimage the Tile  from the already loaded map,
+					//  but referenced  from  LDTK file,  that way  we
+					// could use multiple tileset images
+					tile := assets.Tiles["default"]
+
+					// FIXME: load from LDTK file
+					tile.Sprite = assets.Assets["primarymap"].SubImage(
+						image.Rect(tileData.Src[0],
+							tileData.Src[1],
+							tileData.Src[0]+layer.GridSize,
+							tileData.Src[1]+layer.GridSize)).(*ebiten.Image)
+
+					point := image.Point{
+						tileData.Position[0] / tilesize,
+						tileData.Position[1] / tilesize}
+
+					mapslice[point] = tile
+					backupmap[point] = tile.Clone()
+				}
+			}
+
+		case ldtkgo.LayerTypeEntity:
+			// load mobile tiles (they call them entities) using static map map.png.
+			tileset := assets.Assets["primarymap"]
+
+			for _, entity := range layer.Entities {
+				if entity.TileRect != nil {
+					tile := assets.Tiles[entity.Identifier]
+
+					slog.Debug("LOAD TILE", "tile", entity.TileRect)
+
+					tileRect := entity.TileRect
+
+					tile.Sprite = tileset.SubImage(
+						image.Rect(tileRect.X, tileRect.Y,
+							tileRect.X+tileRect.W,
+							tileRect.Y+tileRect.H)).(*ebiten.Image)
+
+					point := image.Point{
+						entity.Position[0] / tilesize,
+						entity.Position[1] / tilesize}
+
+					mapslice[point] = tile
+					backupmap[point] = tile.Clone()
+				}
+			}
+		}
+	}
+
+	return mapslice, backupmap
+}

game/nextlevel_scene.go

@@ -1,6 +1,7 @@
 package game
 
 import (
+	"fmt"
 	"image/color"
 	"log/slog"
 	"openquell/assets"
@@ -22,12 +23,11 @@ type NextlevelScene struct {
 	Lost     bool
 }
 
-func NewNextlevelScene(game *Game, lost bool) Scene {
+func NewNextlevelScene(game *Game) Scene {
 	scene := &NextlevelScene{
 		Whoami: Nextlevel,
 		Game:   game,
 		Next:   Nextlevel,
-		Lost:   lost,
 	}
 
 	scene.SetupUI()
@@ -61,7 +61,7 @@ func (scene *NextlevelScene) Update() error {
 func (scene *NextlevelScene) SetLevel(level int) {}
 
 func (scene *NextlevelScene) Draw(screen *ebiten.Image) {
-	background := assets.Assets["background-popup"]
+	background := assets.Assets["background-popup-wide"]
 
 	op := &ebiten.DrawImageOptions{}
 	op.GeoM.Translate(
@@ -69,34 +69,81 @@ func (scene *NextlevelScene) Draw(screen *ebiten.Image) {
 		float64((scene.Game.ScreenHeight/2)-(background.Bounds().Dy()/2)),
 	)
 
-	screen.DrawImage(assets.Assets["background-popup"], op)
+	screen.DrawImage(background, op)
 
 	scene.Ui.Draw(screen)
 }
 
 func (scene *NextlevelScene) SetupUI() {
+	observer := observers.GetGameObserver(scene.Game.World)
+	slog.Debug("levels", "max", observer.MaxLevels, "current", observer.CurrentLevel)
+	if observer.MaxLevels == observer.CurrentLevel+1 && !observer.Lost {
+		scene.SetupUILast()
+	} else {
+		scene.SetupUIRetry()
+	}
+
+}
+
+func (scene *NextlevelScene) SetupUILast() {
 	blue := color.RGBA{0, 255, 128, 255}
-	gameobserver := observers.GetGameObserver(scene.Game.World)
+	observer := observers.GetGameObserver(scene.Game.World)
 
 	rowContainer := gameui.NewRowContainer(false)
-	labeltext := "Success"
+	label1text := "Last level, congratulations!"
+	label2text := fmt.Sprintf("Your final score: %d", observer.GetScore())
 
-	switch scene.Lost {
+	buttonMenu := gameui.NewMenuButton("Menu", *assets.FontRenderer.FontNormal,
+		func(args *widget.ButtonClickedEventArgs) {
+			scene.SetNext(Menu)
+		})
+
+	label1 := widget.NewText(
+		widget.TextOpts.Text(label1text, *assets.FontRenderer.FontNormal, blue),
+		widget.TextOpts.Position(widget.TextPositionCenter, widget.TextPositionCenter),
+	)
+
+	label2 := widget.NewText(
+		widget.TextOpts.Text(label2text, *assets.FontRenderer.FontNormal, blue),
+		widget.TextOpts.Position(widget.TextPositionCenter, widget.TextPositionCenter),
+	)
+
+	rowContainer.AddChild(label1)
+	rowContainer.AddChild(label2)
+	rowContainer.AddChild(buttonMenu)
+
+	scene.Ui = &ebitenui.UI{
+		Container: rowContainer.Container(),
+	}
+}
+
+func (scene *NextlevelScene) SetupUIRetry() {
+	blue := color.RGBA{0, 255, 128, 255}
+	observer := observers.GetGameObserver(scene.Game.World)
+	buttonNext := &widget.Button{}
+
+	rowContainer := gameui.NewRowContainer(false)
+	labeltext := fmt.Sprintf("Great! (Score: %d)", observer.GetLevelScore())
+	islast := observer.MaxLevels == observer.CurrentLevel+1
+
+	switch observer.Lost {
 	case true:
-		labeltext = "Failure"
+		labeltext = "Too bad!"
 	}
 
 	buttonRetry := gameui.NewMenuButton("Retry", *assets.FontRenderer.FontNormal,
 		func(args *widget.ButtonClickedEventArgs) {
 			scene.SetNext(Play)
-			gameobserver.Retry = true
+			observer.Retry = true
 		})
 
-	buttonNext := gameui.NewMenuButton("Next Level", *assets.FontRenderer.FontNormal,
+	if !islast {
-		func(args *widget.ButtonClickedEventArgs) {
+		buttonNext = gameui.NewMenuButton("Next Level", *assets.FontRenderer.FontNormal,
-			scene.SetNext(Play)
+			func(args *widget.ButtonClickedEventArgs) {
-			gameobserver.Retry = false
+				scene.SetNext(Play)
-		})
+				observer.Retry = false
+			})
+	}
 
 	buttonAbort := gameui.NewMenuButton("Abort", *assets.FontRenderer.FontNormal,
 		func(args *widget.ButtonClickedEventArgs) {
@@ -104,12 +151,14 @@ func (scene *NextlevelScene) SetupUI() {
 		})
 
 	label := widget.NewText(
-		widget.TextOpts.Text(labeltext, *assets.FontRenderer.FontBig, blue),
+		widget.TextOpts.Text(labeltext, *assets.FontRenderer.FontNormal, blue),
 		widget.TextOpts.Position(widget.TextPositionCenter, widget.TextPositionCenter),
 	)
 
 	rowContainer.AddChild(label)
-	rowContainer.AddChild(buttonNext)
+	if !islast {
+		rowContainer.AddChild(buttonNext)
+	}
 	rowContainer.AddChild(buttonRetry)
 	rowContainer.AddChild(buttonAbort)
 

game/play_scene.go

@@ -0,0 +1,101 @@
+package game
+
+import (
+	"image"
+	"log/slog"
+	"openquell/assets"
+	"openquell/config"
+
+	"github.com/hajimehoshi/ebiten/v2"
+	"github.com/hajimehoshi/ebiten/v2/inpututil"
+)
+
+type PlayScene struct {
+	Game         *Game
+	CurrentLevel int
+	Levels       []*Level
+	Next         SceneName
+	Whoami       SceneName
+	UseCache     bool
+	MenuRect     image.Rectangle
+}
+
+// Implements the actual playing Scene
+func NewPlayScene(game *Game, startlevel int) Scene {
+	scene := &PlayScene{Whoami: Play, Next: Play, Game: game}
+
+	scene.GenerateLevels(game)
+	scene.SetLevel(startlevel)
+	scene.MenuRect = image.Rect(config.MenuRectX, config.MenuRectY,
+		config.MenuRectX+config.MenuRectCellsize,
+		config.MenuRectY+config.MenuRectCellsize)
+
+	return scene
+}
+
+func (scene *PlayScene) GenerateLevels(game *Game) {
+	min := []int{}
+	for _, level := range assets.Project.Levels {
+		level := level
+		scene.Levels = append(scene.Levels, NewLevel(game, 32, level))
+		min = append(min, level.PropertyByIdentifier("minmoves").AsInt())
+	}
+
+	scene.Game.Observer.SetupLevelScore(min)
+	scene.Game.Observer.SetupMaxLevels(len(min))
+	scene.Game.Levels = scene.Levels
+}
+
+func (scene *PlayScene) SetLevel(level int) {
+	scene.CurrentLevel = level
+	scene.Levels[scene.CurrentLevel].SetupGrid(scene.Game)
+}
+
+// Interface methods
+func (scene *PlayScene) SetNext(next SceneName) {
+	scene.Next = next
+}
+
+func (scene *PlayScene) GetNext() SceneName {
+	// FIXME: set to winner or options screen
+	return scene.Next
+}
+
+func (scene *PlayScene) ResetNext() {
+	scene.Next = scene.Whoami
+}
+
+func (scene *PlayScene) Clearscreen() bool {
+	return false
+}
+
+func (scene *PlayScene) Update() error {
+	scene.Levels[scene.CurrentLevel].Update()
+
+	switch {
+	case inpututil.IsKeyJustPressed(ebiten.KeyEscape):
+		scene.SetNext(Popup)
+
+	case inpututil.IsMouseButtonJustPressed(ebiten.MouseButtonLeft):
+		// ok we're checking the menu button here, but drawing it in hud_system,
+		// because systems can't switch scenes
+		if image.Pt(ebiten.CursorPosition()).In(scene.MenuRect) {
+			scene.SetNext(Popup)
+		}
+	}
+
+	return nil
+}
+
+func (scene *PlayScene) Draw(screen *ebiten.Image) {
+	// FIXME: why not in Update() ?!?!?!
+	if scene.CurrentLevel != scene.Game.Observer.CurrentLevel {
+		slog.Debug("level", "current", scene.CurrentLevel,
+			"next", scene.Game.Observer.CurrentLevel)
+		scene.CurrentLevel = scene.Game.Observer.CurrentLevel
+		scene.Levels[scene.CurrentLevel].SetupGrid(scene.Game)
+	}
+
+	screen.Clear()
+	scene.Levels[scene.CurrentLevel].Draw(screen)
+}

game/popup_scene.go

@@ -5,11 +5,13 @@ import (
 	"log/slog"
 	"openquell/assets"
 	"openquell/gameui"
+	"openquell/observers"
 
 	"github.com/ebitenui/ebitenui"
 	"github.com/ebitenui/ebitenui/widget"
 
 	"github.com/hajimehoshi/ebiten/v2"
+	"github.com/hajimehoshi/ebiten/v2/inpututil"
 )
 
 type PopupScene struct {
@@ -50,6 +52,11 @@ func (scene *PopupScene) Clearscreen() bool {
 
 func (scene *PopupScene) Update() error {
 	scene.Ui.Update()
+
+	if inpututil.IsKeyJustPressed(ebiten.KeyEscape) {
+		scene.SetNext(Play)
+	}
+
 	return nil
 }
 
@@ -69,6 +76,7 @@ func (scene *PopupScene) Draw(screen *ebiten.Image) {
 
 func (scene *PopupScene) SetupUI() {
 	blue := color.RGBA{0, 255, 128, 255}
+	observer := observers.GetGameObserver(scene.Game.World)
 
 	rowContainer := gameui.NewRowContainer(false)
 
@@ -82,9 +90,10 @@ func (scene *PopupScene) SetupUI() {
 			scene.SetNext(Menu)
 		})
 
-	buttonOptions := gameui.NewMenuButton("Options", *assets.FontRenderer.FontNormal,
+	buttonRetry := gameui.NewMenuButton("Retry", *assets.FontRenderer.FontNormal,
 		func(args *widget.ButtonClickedEventArgs) {
-			scene.SetNext(Settings)
+			scene.SetNext(Play)
+			observer.Retry = true
 		})
 
 	label := widget.NewText(
@@ -94,8 +103,8 @@ func (scene *PopupScene) SetupUI() {
 
 	rowContainer.AddChild(label)
 	rowContainer.AddChild(buttonContinue)
+	rowContainer.AddChild(buttonRetry)
 	rowContainer.AddChild(buttonAbort)
-	rowContainer.AddChild(buttonOptions)
 
 	scene.Ui = &ebitenui.UI{
 		Container: rowContainer.Container(),

game/select_scene.go

@@ -13,6 +13,7 @@ import (
 	"github.com/ebitenui/ebitenui/widget"
 
 	"github.com/hajimehoshi/ebiten/v2"
+	"github.com/hajimehoshi/ebiten/v2/inpututil"
 )
 
 type SelectScene struct {
@@ -53,6 +54,11 @@ func (scene *SelectScene) Clearscreen() bool {
 
 func (scene *SelectScene) Update() error {
 	scene.Ui.Update()
+
+	if inpututil.IsKeyJustPressed(ebiten.KeyEscape) {
+		scene.SetNext(Menu)
+	}
+
 	return nil
 }
 
@@ -61,8 +67,9 @@ func (scene *SelectScene) Draw(screen *ebiten.Image) {
 }
 
 type LevelEntry struct {
-	Id   int
+	Id     int
-	Name string
+	Number int
+	Name   string
 }
 
 func (scene *SelectScene) SetupUI() {
@@ -79,7 +86,7 @@ func (scene *SelectScene) SetupUI() {
 
 	levels := make([]any, 0, len(scene.Game.Levels))
 	for id := 0; id < len(scene.Game.Levels); id++ {
-		levels = append(levels, LevelEntry{Id: id, Name: scene.Game.Levels[id].Name})
+		levels = append(levels, LevelEntry{Id: id, Number: scene.Game.Levels[id].Number, Name: scene.Game.Levels[id].Name})
 	}
 
 	slog.Debug("levels", "levels", levels)
@@ -92,10 +99,10 @@ func (scene *SelectScene) SetupUI() {
 		// Set how wide the list should be
 		widget.ListOpts.ContainerOpts(widget.ContainerOpts.WidgetOpts(
 			widget.WidgetOpts.MinSize(150, 0),
-			widget.WidgetOpts.LayoutData(widget.AnchorLayoutData{
+			widget.WidgetOpts.LayoutData(widget.RowLayoutData{
-				HorizontalPosition: widget.AnchorLayoutPositionCenter,
+				Position:  widget.RowLayoutPositionCenter,
-				VerticalPosition:   widget.AnchorLayoutPositionEnd,
+				Stretch:   true,
-				StretchVertical:    true,
+				MaxHeight: 200,
 			}),
 		)),
 		// Set the entries in the list
@@ -123,18 +130,18 @@ func (scene *SelectScene) SetupUI() {
 		widget.ListOpts.EntryFontFace(*assets.FontRenderer.FontNormal),
 		// Set the colors for the list
 		widget.ListOpts.EntryColor(&widget.ListEntryColor{
-			Selected:                   color.NRGBA{0, 255, 0, 255},                 // Foreground color for the unfocused selected entry
+			Selected:                   color.NRGBA{0, 255, 0, 255},
-			Unselected:                 color.NRGBA{254, 255, 255, 255},             // Foreground color for the unfocused unselected entry
+			Unselected:                 color.NRGBA{254, 255, 255, 255},
-			SelectedBackground:         color.NRGBA{R: 130, G: 130, B: 200, A: 255}, // Background color for the unfocused selected entry
+			SelectedBackground:         color.NRGBA{R: 130, G: 130, B: 200, A: 255},
-			SelectedFocusedBackground:  color.NRGBA{R: 130, G: 130, B: 170, A: 255}, // Background color for the focused selected entry
+			SelectedFocusedBackground:  color.NRGBA{R: 130, G: 130, B: 170, A: 255},
-			FocusedBackground:          color.NRGBA{R: 170, G: 170, B: 180, A: 255}, // Background color for the focused unselected entry
+			FocusedBackground:          color.NRGBA{R: 170, G: 170, B: 180, A: 255},
-			DisabledUnselected:         color.NRGBA{100, 100, 100, 255},             // Foreground color for the disabled unselected entry
+			DisabledUnselected:         color.NRGBA{100, 100, 100, 255},
-			DisabledSelected:           color.NRGBA{100, 100, 100, 255},             // Foreground color for the disabled selected entry
+			DisabledSelected:           color.NRGBA{100, 100, 100, 255},
-			DisabledSelectedBackground: color.NRGBA{100, 100, 100, 255},             // Background color for the disabled selected entry
+			DisabledSelectedBackground: color.NRGBA{100, 100, 100, 255},
 		}),
 		// This required function returns the string displayed in the list
 		widget.ListOpts.EntryLabelFunc(func(e interface{}) string {
-			return e.(LevelEntry).Name
+			return fmt.Sprintf("%02d %s", e.(LevelEntry).Number, e.(LevelEntry).Name)
 		}),
 		// Padding for each entry
 		widget.ListOpts.EntryTextPadding(widget.NewInsetsSimple(5)),
@@ -148,14 +155,31 @@ func (scene *SelectScene) SetupUI() {
 		}),
 	)
 
+	buttonContainer := widget.NewContainer(
+		widget.ContainerOpts.Layout(widget.NewGridLayout(
+			widget.GridLayoutOpts.Columns(2),
+			widget.GridLayoutOpts.Padding(widget.NewInsetsSimple(30)),
+			widget.GridLayoutOpts.Spacing(20, 10),
+			widget.GridLayoutOpts.Stretch([]bool{true, false}, []bool{false, true}),
+		)),
+	)
+
 	buttonPlay := gameui.NewMenuButton("Play selected level", *assets.FontRenderer.FontNormal,
 		func(args *widget.ButtonClickedEventArgs) {
 			scene.SetNext(Play)
 		})
 
+	buttonAbort := gameui.NewMenuButton("Back", *assets.FontRenderer.FontNormal,
+		func(args *widget.ButtonClickedEventArgs) {
+			scene.SetNext(Menu)
+		})
+
+	buttonContainer.AddChild(buttonPlay)
+	buttonContainer.AddChild(buttonAbort)
+
 	rowContainer.AddChild(label)
 	rowContainer.AddChild(list)
-	rowContainer.AddChild(buttonPlay)
+	rowContainer.AddChild(buttonContainer)
 
 	scene.Ui = &ebitenui.UI{
 		Container: rowContainer.Container(),

go.mod

@@ -3,29 +3,37 @@ module openquell
 go 1.21
 
 require (
+	github.com/alecthomas/repr v0.3.0
+	github.com/ebitenui/ebitenui v0.5.6-0.20240319232637-752494bdfcac
+	github.com/golang/freetype v0.0.0-20170609003504-e2365dfdc4a0
 	github.com/hajimehoshi/ebiten/v2 v2.6.6
+	github.com/knadh/koanf v1.5.0
 	github.com/mlange-42/arche v0.10.0
+	github.com/solarlune/ldtkgo v0.9.4-0.20240310011150-66aa15c2ab56
+	github.com/spf13/pflag v1.0.5
+	github.com/tinne26/etxt v0.0.8
+	github.com/tlinden/yadu v0.1.3
+	golang.org/x/image v0.15.0
 )
 
 require (
-	github.com/alecthomas/repr v0.3.0 // indirect
+	github.com/ebitengine/purego v0.6.1 // indirect
-	github.com/ebitengine/purego v0.6.0 // indirect
-	github.com/ebitenui/ebitenui v0.5.5 // indirect
 	github.com/fatih/color v1.16.0 // indirect
-	github.com/go-gl/glfw/v3.3/glfw v0.0.0-20221017161538-93cebf72946b // indirect
+	github.com/jezek/xgb v1.1.1 // indirect
-	github.com/golang/freetype v0.0.0-20170609003504-e2365dfdc4a0 // indirect
-	github.com/hajimehoshi/ebiten v1.12.12 // indirect
-	github.com/jezek/xgb v1.1.0 // indirect
 	github.com/mattn/go-colorable v0.1.13 // indirect
 	github.com/mattn/go-isatty v0.0.20 // indirect
-	github.com/tinne26/etxt v0.0.8 // indirect
+	github.com/mitchellh/copystructure v1.2.0 // indirect
-	github.com/tlinden/yadu v0.1.3 // indirect
+	github.com/mitchellh/mapstructure v1.5.0 // indirect
-	golang.org/x/exp v0.0.0-20230817173708-d852ddb80c63 // indirect
+	github.com/mitchellh/reflectwalk v1.0.2 // indirect
-	golang.org/x/exp/shiny v0.0.0-20230817173708-d852ddb80c63 // indirect
+	github.com/rogpeppe/go-internal v1.12.0 // indirect
-	golang.org/x/image v0.12.0 // indirect
+	github.com/tidwall/gjson v1.9.3 // indirect
-	golang.org/x/mobile v0.0.0-20230922142353-e2f452493d57 // indirect
+	github.com/tidwall/match v1.1.1 // indirect
-	golang.org/x/sync v0.3.0 // indirect
+	github.com/tidwall/pretty v1.2.0 // indirect
-	golang.org/x/sys v0.14.0 // indirect
+	golang.org/x/exp v0.0.0-20240222234643-814bf88cf225 // indirect
-	golang.org/x/text v0.13.0 // indirect
+	golang.org/x/exp/shiny v0.0.0-20240222234643-814bf88cf225 // indirect
+	golang.org/x/mobile v0.0.0-20240213143359-d1f7d3436075 // indirect
+	golang.org/x/sync v0.6.0 // indirect
+	golang.org/x/sys v0.18.0 // indirect
+	golang.org/x/text v0.14.0 // indirect
 	gopkg.in/yaml.v3 v3.0.1 // indirect
 )

go.sum

@@ -1,133 +1,445 @@
-github.com/BurntSushi/xgb v0.0.0-20160522181843-27f122750802/go.mod h1:IVnqGOEym/WlBOVXweHU+Q+/VP0lqqI8lqeDx9IjBqo=
+cloud.google.com/go v0.26.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw=
+cloud.google.com/go v0.34.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw=
+github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03qcyfWMU=
 github.com/alecthomas/repr v0.3.0 h1:NeYzUPfjjlqHY4KtzgKJiWd6sVq2eNUPTi34PiFGjY8=
 github.com/alecthomas/repr v0.3.0/go.mod h1:Fr0507jx4eOXV7AlPV6AVZLYrLIuIeSOWtW57eE/O/4=
-github.com/ebitengine/purego v0.5.0 h1:JrMGKfRIAM4/QVKaesIIT7m/UVjTj5GYhRSQYwfVdpo=
+github.com/alecthomas/template v0.0.0-20160405071501-a0175ee3bccc/go.mod h1:LOuyumcjzFXgccqObfd/Ljyb9UuFJ6TxHnclSeseNhc=
-github.com/ebitengine/purego v0.5.0/go.mod h1:ah1In8AOtksoNK6yk5z1HTJeUkC1Ez4Wk2idgGslMwQ=
+github.com/alecthomas/template v0.0.0-20190718012654-fb15b899a751/go.mod h1:LOuyumcjzFXgccqObfd/Ljyb9UuFJ6TxHnclSeseNhc=
-github.com/ebitengine/purego v0.6.0 h1:Yo9uBc1x+ETQbfEaf6wcBsjrQfCEnh/gaGUg7lguEJY=
+github.com/alecthomas/units v0.0.0-20151022065526-2efee857e7cf/go.mod h1:ybxpYRFXyAe+OPACYpWeL0wqObRcbAqCMya13uyzqw0=
-github.com/ebitengine/purego v0.6.0/go.mod h1:ah1In8AOtksoNK6yk5z1HTJeUkC1Ez4Wk2idgGslMwQ=
+github.com/alecthomas/units v0.0.0-20190717042225-c3de453c63f4/go.mod h1:ybxpYRFXyAe+OPACYpWeL0wqObRcbAqCMya13uyzqw0=
-github.com/ebitenui/ebitenui v0.5.5 h1:L9UCWmiMlo4sG5TavQKmjfsnwMmYqkld2tXWZMmKkSA=
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-github.com/ebitenui/ebitenui v0.5.5/go.mod h1:CkzAwu9Ks32P+NC/7+iypdLA85Wqnn93UztPFE+kAH4=
+github.com/antihax/optional v1.0.0/go.mod h1:uupD/76wgC+ih3iEmQUL+0Ugr19nfwCT1kdvxnR2qWY=
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+github.com/armon/go-metrics v0.0.0-20180917152333-f0300d1749da/go.mod h1:Q73ZrmVTwzkszR9V5SSuryQ31EELlFMUz1kKyl939pY=
+github.com/armon/go-radix v0.0.0-20180808171621-7fddfc383310/go.mod h1:ufUuZ+zHj4x4TnLV4JWEpy2hxWSpsRywHrMgIH9cCH8=
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+github.com/aws/aws-sdk-go-v2/feature/ec2/imds v1.6.0/go.mod h1:gqlclDEZp4aqJOancXK6TN24aKhT0W0Ae9MHk3wzTMM=
+github.com/aws/aws-sdk-go-v2/internal/ini v1.2.4/go.mod h1:ZcBrrI3zBKlhGFNYWvju0I3TR93I7YIgAfy82Fh4lcQ=
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+github.com/aws/aws-sdk-go-v2/service/sso v1.4.2/go.mod h1:NBvT9R1MEF+Ud6ApJKM0G+IkPchKS7p7c2YPKwHmBOk=
+github.com/aws/aws-sdk-go-v2/service/sts v1.7.2/go.mod h1:8EzeIqfWt2wWT4rJVu3f21TfrhJ8AEMzVybRNSb/b4g=
+github.com/aws/smithy-go v1.8.0/go.mod h1:SObp3lf9smib00L/v3U2eAKG8FyQ7iLrJnQiAmR5n+E=
+github.com/beorn7/perks v0.0.0-20180321164747-3a771d992973/go.mod h1:Dwedo/Wpr24TaqPxmxbtue+5NUziq4I4S80YR8gNf3Q=
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+github.com/bgentry/speakeasy v0.1.0/go.mod h1:+zsyZBPWlz7T6j88CTgSN5bM796AkVf0kBD4zp0CCIs=
+github.com/census-instrumentation/opencensus-proto v0.2.1/go.mod h1:f6KPmirojxKA12rnyqOA5BBL4O983OfeGPqjHWSTneU=
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+github.com/coreos/go-semver v0.3.0/go.mod h1:nnelYz7RCh+5ahJtPPxZlU+153eP4D4r3EedlOD2RNk=
+github.com/coreos/go-systemd/v22 v22.3.2/go.mod h1:Y58oyj3AT4RCenI/lSvhwexgC+NSVTIJ3seZv2GcEnc=
+github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
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+github.com/dustin/go-humanize v1.0.0/go.mod h1:HtrtbFcZ19U5GC7JDqmcUSB87Iq5E25KnS6fMYU6eOk=
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grid/collider.go

@@ -5,6 +5,36 @@ import (
 	. "openquell/config"
 )
 
+// Check a collision  on the grid. We check if  the entity in question
+// bumps into the  egde of the grid  or if it bumps onto  a solid wall
+// tile. For both cases the user must provide responder funcs in which
+// it must be implemented how to react on those events.
+func (grid *Grid) CheckGridCollision(
+	position *components.Position,
+	velocity *components.Velocity,
+	respond_edge func(*components.Position, *components.Velocity, *components.Position),
+	respond_solid func(*components.Position, *components.Velocity, *components.Position),
+) {
+
+	if velocity.Moving() {
+		ok, newpos := grid.BumpEdge(position, velocity)
+		if ok {
+			//slog.Debug("falling off the edge", "newpos", newpos)
+			respond_edge(position, velocity, newpos)
+		} else {
+			ok, tilepos := grid.GetSolidNeighborPosition(position, velocity, true)
+			if ok {
+				// slog.Debug("HaveSolidNeighbor", "ok", ok, "tilepos",
+				// 	tilepos.Point(), "playerpos", playerposition)
+				intersects, newpos := tilepos.Intersects(position, velocity)
+				if intersects {
+					respond_solid(position, velocity, newpos)
+				}
+			}
+		}
+	}
+}
+
 func (grid *Grid) GetSolidNeighborPosition(
 	position *components.Position,
 	velocity *components.Velocity,
@@ -14,7 +44,7 @@ func (grid *Grid) GetSolidNeighborPosition(
 		return false, nil
 	}
 
-	// set to true,  if we are already on the last  tile in the current
+	// set to true  if we are already on the last  tile in the current
 	// direction, i.e. on the edge of the grid
 	edge := true
 	neighborpos := position.Point()
@@ -44,6 +74,9 @@ func (grid *Grid) GetSolidNeighborPosition(
 
 	newpos := components.NewPosition(neighborpos, grid.Tilesize)
 
+	// slog.Debug("SolidNeighbor?", "player", position.Point(),
+	// 	"neighbor", neighborpos, "edge", edge, "neighbor-solid",
+	// 	grid.Map[neighborpos].Solid, "newpos", newpos.Point())
 	if !edge && grid.Map[neighborpos].Solid {
 		return true, newpos
 	}

grid/grid.go

@@ -29,11 +29,10 @@ func NewGrid(world *ecs.World,
 
 	// we use this to turn  our tiles into iterable entities, used for
 	// collision detection, transformation and other things
-	playermapper := generic.NewMap5[
+	playermapper := generic.NewMap4[
 		components.Position,
 		components.Velocity,
 		components.Renderable,
-		components.Speed,
 		components.Player](world)
 
 	solidmapper := generic.NewMap4[
@@ -49,11 +48,10 @@ func NewGrid(world *ecs.World,
 		components.Renderable,
 		components.Collectible](world)
 
-	obsmapper := generic.NewMap5[
+	obsmapper := generic.NewMap4[
 		components.Position,
 		components.Velocity,
 		components.Renderable,
-		components.Speed,
 		components.Obstacle](world)
 
 	transmapper := generic.NewMap3[
@@ -61,15 +59,22 @@ func NewGrid(world *ecs.World,
 		components.Renderable,
 		components.Transient](world)
 
+	doormapper := generic.NewMap3[
+		components.Position,
+		components.Renderable,
+		components.Destroyable](world)
+
 	var pos *components.Position
 	var vel *components.Velocity
 	var render *components.Renderable
-	var speed *components.Speed
 	var transient *components.Transient
 	var player *components.Player
+	var destroyable *components.Destroyable
 
-	playerobserver := observers.GetPlayerObserver(world)
+	playerID := ecs.ComponentID[components.Player](world)
-	obstacleobserver := observers.GetObstacleObserver(world)
+	obstacleID := ecs.ComponentID[components.Obstacle](world)
+
+	observer := observers.GetGameObserver(world)
 
 	for point, tile := range mapslice {
 		switch tile.Renderable {
@@ -80,29 +85,41 @@ func NewGrid(world *ecs.World,
 				pos, render, _, _ = solidmapper.Get(entity)
 			case tile.Player:
 				entity := playermapper.New()
-				pos, _, render, speed, player = playermapper.Get(entity)
+				pos, vel, render, player = playermapper.Get(entity)
-				playerobserver.AddEntity(entity)
+				observer.AddEntity(entity, playerID)
-				speed.Value = config.PLAYERSPEED
+				vel.Speed = config.PLAYERSPEED
 				player.IsPrimary = tile.IsPrimary
 				player.Sprites = tile.Tiles
+				player.LoopPos = &components.Position{Cellsize: tilesize}
 			case tile.Collectible:
 				entity := colmapper.New()
 				pos, render, _ = colmapper.Get(entity)
 			case tile.Obstacle:
 				entity := obsmapper.New()
-				pos, vel, render, speed, _ = obsmapper.Get(entity)
+				pos, vel, render, _ = obsmapper.Get(entity)
 				vel.Direction = tile.Direction
 				vel.PointingAt = tile.Direction
-				speed.Value = config.PLAYERSPEED
+				vel.Speed = config.PLAYERSPEED
-				obstacleobserver.AddEntity(entity)
+				observer.AddEntity(entity, obstacleID)
 			case tile.Transient:
 				entity := transmapper.New()
 				pos, render, transient = transmapper.Get(entity)
 				transient.Sprites = tile.TileNames
+			case tile.Destroyable:
+				entity := doormapper.New()
+				pos, render, destroyable = doormapper.Get(entity)
+				destroyable.Sprites = tile.Tiles
+				render.DamageImage = tile.Alpha
+				render.Shader = tile.Shader
+				render.Damaged = 0
 			default:
 				log.Fatalln("unsupported tile type encountered")
 			}
 
+			// FIXME:  this image  is never being  used because  it is
+			// being overwritten in game/levels.go:LevelToSlice(). The
+			// image is  taken from the LDTK map, not  from the Tile{}
+			// definition anymore
 			render.Image = tile.Sprite
 
 		default:
@@ -143,7 +160,15 @@ func (grid *Grid) GetTile(
 	return tile
 }
 
-func (grid *Grid) SetTile(tile *assets.Tile, point image.Point) {
+func (grid *Grid) RemoveTile(point image.Point) {
+	delete(grid.Map, point)
+}
+
+func (grid *Grid) SetFloorTile(point image.Point) {
+	grid.Map[point] = assets.Tiles["floor"]
+}
+
+func (grid *Grid) SetSolidTile(tile *assets.Tile, point image.Point) {
 	solidmapper := generic.NewMap4[
 		components.Position,
 		components.Renderable,

index.html

@@ -0,0 +1,16 @@
+<!DOCTYPE html>
+<script src="wasm_exec.js"></script>
+<script>
+// Polyfill
+if (!WebAssembly.instantiateStreaming) {
+    WebAssembly.instantiateStreaming = async (resp, importObject) => {
+        const source = await (await resp).arrayBuffer();
+        return await WebAssembly.instantiate(source, importObject);
+    };
+}
+
+const go = new Go();
+WebAssembly.instantiateStreaming(fetch("openquell.wasm"), go.importObject).then(result => {
+    go.run(result.instance);
+});
+</script>

level-mode.el

@@ -1,18 +0,0 @@
-(define-derived-mode level-mode text-mode "level mode"
-  "game levels"
-  (setq buffer-face-mode-face '(:family "Monaco-10:spacing=110" :height 100 ))
-  )
-
-(defun level-delete-char()
-  (interactive)
-  (when (< 2 (line-number-at-pos))
-    (delete-char 1)))
-
-(add-hook 'level-mode-hook 'whitespace-mode)
-(add-hook 'level-mode-hook (lambda() (hungry-delete-mode 0)))
-
-(add-hook 'level-mode-hook
-          (lambda ()
-            (add-hook 'post-self-insert-hook 'level-delete-char nil 'make-it-local)))
-
-(provide 'level-mode)

local.html

@@ -0,0 +1,2 @@
+<!DOCTYPE html>
+<iframe src="main.html" width="640" height="480"></iframe>

main.go

@@ -1,11 +1,14 @@
 package main
 
 import (
+	"fmt"
 	"log"
 	"log/slog"
+	"openquell/config"
 	"openquell/game"
 	"os"
 
+	"github.com/alecthomas/repr"
 	"github.com/hajimehoshi/ebiten/v2"
 	"github.com/tlinden/yadu"
 )
@@ -20,22 +23,35 @@ func main() {
 	ebiten.SetWindowSize(width, height)
 	ebiten.SetWindowTitle("openquell")
 
+	config, err := config.InitConfig()
+	if err != nil {
+		log.Fatal(err)
+	}
+
+	repr.Print(config)
+	if config.TPS > 0 {
+		fmt.Printf("Setting TPS to %d\n", config.TPS)
+		ebiten.SetMaxTPS(config.TPS)
+	}
+
 	logLevel := &slog.LevelVar{}
 	opts := &yadu.Options{
 		Level:     logLevel,
 		AddSource: true,
 	}
 
-	logLevel.Set(slog.LevelDebug)
+	if config.Debug {
+		logLevel.Set(slog.LevelDebug)
+	}
 
 	handler := yadu.NewHandler(os.Stdout, opts)
 
 	debuglogger := slog.New(handler)
 	slog.SetDefault(debuglogger)
 
-	g := game.NewGame(width, height, cellsize, 0, game.Welcome)
+	g := game.NewGame(width, height, cellsize, config, game.Welcome)
 
-	err := ebiten.RunGame(g)
+	err = ebiten.RunGame(g)
 	if err != nil {
 		log.Fatalf("unable to run game: %s", err)
 	}

observers/game_observer.go

@@ -1,31 +1,81 @@
 package observers
 
 import (
+	"math/rand"
 	"openquell/components"
 
+	"log/slog"
+
 	"github.com/mlange-42/arche/ecs"
+	"github.com/mlange-42/arche/ecs/event"
 	"github.com/mlange-42/arche/generic"
+	"github.com/mlange-42/arche/listener"
 )
 
-// Used for global game state
+type Score struct {
-type GameObserver struct {
+	Min, Score int
-	CurrentLevel, Width     int
-	Height, Cellsize, Score int
-	StopTimer               *components.Timer
-	Lost                    bool // set to true if player is struck or something, by default: win!
-	Retry                   bool
-	NextlevelText           string
 }
 
-func NewGameObserver(world *ecs.World, startlevel, width, height, cellsize int) *GameObserver {
+// Used for global game state. Also stores mobile entities of the
+// current level. The Entities map will be reset on each level
+// initialization in grid/grid.go
+type GameObserver struct {
+	World                      *ecs.World
+	CurrentLevel, Width, Moves int
+	Height, Cellsize, Score    int
+	StopTimer                  *components.Timer
+	Lost                       bool // set to true if player is struck or something, by default: win!
+	Retry                      bool
+	NextlevelText              string
+	Entities                   map[ecs.ID]map[ecs.Entity]int
+	LevelScore                 map[int]*Score // one score per level
+	Id                         int
+	MaxLevels                  int
+}
+
+func (observer *GameObserver) GetListenerCallback(comp ecs.ID) listener.Callback {
+	return listener.NewCallback(
+		func(world *ecs.World, event ecs.EntityEvent) {
+			observer.RemoveEntity(event.Entity, comp)
+		},
+		event.EntityRemoved,
+		comp,
+	)
+}
+
+func NewGameObserver(
+	world *ecs.World, startlevel, width, height, cellsize int) *GameObserver {
 	observer := &GameObserver{
 		CurrentLevel: startlevel,
 		StopTimer:    &components.Timer{},
 		Width:        width,
 		Height:       height,
 		Cellsize:     cellsize,
+		World:        world,
+		Id:           rand.Intn(1000),
 	}
 
+	playerID := ecs.ComponentID[components.Player](world)
+	obstacleID := ecs.ComponentID[components.Obstacle](world)
+	particleID := ecs.ComponentID[components.Particle](world)
+
+	playerListener := observer.GetListenerCallback(playerID)
+	obstacleListener := observer.GetListenerCallback(obstacleID)
+	particleListener := observer.GetListenerCallback(particleID)
+
+	listen := listener.NewDispatch(
+		&playerListener,
+		&obstacleListener,
+		&particleListener,
+	)
+
+	world.SetListener(&listen)
+
+	observer.Entities = make(map[ecs.ID]map[ecs.Entity]int)
+	observer.Entities[playerID] = make(map[ecs.Entity]int)
+	observer.Entities[obstacleID] = make(map[ecs.Entity]int)
+	observer.Entities[particleID] = make(map[ecs.Entity]int)
+
 	resmanger := generic.NewResource[GameObserver](world)
 	resmanger.Add(observer)
 
@@ -33,11 +83,105 @@ func NewGameObserver(world *ecs.World, startlevel, width, height, cellsize int)
 }
 
 func GetGameObserver(world *ecs.World) *GameObserver {
-	observerID := ecs.ResourceID[GameObserver](world)
+	resmanger := generic.NewResource[GameObserver](world)
-	observer := world.Resources().Get(observerID).(*GameObserver)
+	observer := resmanger.Get()
+
 	return observer
 }
 
 func (observer *GameObserver) Gameover() {
 	observer.Lost = true
 }
+
+func (observer *GameObserver) AddEntity(entity ecs.Entity, comp ecs.ID) {
+	observer.Entities[comp][entity] = 1
+}
+
+func (observer *GameObserver) RemoveEntity(entity ecs.Entity, comp ecs.ID) {
+	delete(observer.Entities[comp], entity)
+}
+
+func (observer *GameObserver) GetEntities(comp ecs.ID) []ecs.Entity {
+	keys := make([]ecs.Entity, 0, len(observer.Entities[comp]))
+	for k, _ := range observer.Entities[comp] {
+		keys = append(keys, k)
+	}
+	return keys
+}
+
+func (observer *GameObserver) GetPlayers() []ecs.Entity {
+	playerID := ecs.ComponentID[components.Player](observer.World)
+	return observer.GetEntities(playerID)
+}
+
+func (observer *GameObserver) GetObstacles() []ecs.Entity {
+	obstacleID := ecs.ComponentID[components.Obstacle](observer.World)
+	return observer.GetEntities(obstacleID)
+}
+
+func (observer *GameObserver) GetParticles() []ecs.Entity {
+	particleID := ecs.ComponentID[components.Particle](observer.World)
+	return observer.GetEntities(particleID)
+}
+
+func (observer *GameObserver) RemoveEntities() {
+	playerID := ecs.ComponentID[components.Player](observer.World)
+	obstacleID := ecs.ComponentID[components.Obstacle](observer.World)
+	particleID := ecs.ComponentID[components.Particle](observer.World)
+
+	observer.Entities = make(map[ecs.ID]map[ecs.Entity]int)
+	observer.Entities[playerID] = make(map[ecs.Entity]int)
+	observer.Entities[obstacleID] = make(map[ecs.Entity]int)
+	observer.Entities[particleID] = make(map[ecs.Entity]int)
+}
+
+func (observer *GameObserver) SetupLevelScore(min []int) {
+	observer.LevelScore = make(map[int]*Score, len(min))
+
+	for level, minmoves := range min {
+		observer.LevelScore[level] = &Score{Min: minmoves}
+	}
+}
+
+func (observer *GameObserver) SetupMaxLevels(count int) {
+	observer.MaxLevels = count
+}
+
+// set current level stats and reset counters
+func (observer *GameObserver) AddScore() {
+	level := observer.CurrentLevel
+	moves := observer.Moves
+
+	slog.Debug("AddScore", "moves", observer.Moves)
+
+	if observer.Lost {
+		observer.LevelScore[level].Score = 0
+		slog.Debug("lost")
+	} else {
+		observer.LevelScore[level].Score = ((observer.LevelScore[level].Min * 100) / moves) / 30
+		slog.Debug("won", "score", observer.LevelScore[level].Score,
+			"Min", observer.LevelScore[level].Min,
+			"Min-x-100", observer.LevelScore[level].Min*100,
+			"Min-x-100-moves", (observer.LevelScore[level].Min*100)/moves,
+		)
+	}
+
+	observer.Moves = 0
+}
+
+func (observer *GameObserver) AddMove() {
+	observer.Moves++
+}
+
+func (observer *GameObserver) GetScore() int {
+	sum := 0
+	for _, score := range observer.LevelScore {
+		sum += score.Score
+	}
+
+	return sum
+}
+
+func (observer *GameObserver) GetLevelScore() int {
+	return observer.LevelScore[observer.CurrentLevel].Score
+}

observers/obstacle_observer.go

@@ -1,54 +0,0 @@
-package observers
-
-import (
-	"github.com/mlange-42/arche/ecs"
-	"github.com/mlange-42/arche/ecs/event"
-	"github.com/mlange-42/arche/generic"
-	"github.com/mlange-42/arche/listener"
-)
-
-// will be added as  an ecs.Resource to the world so we  can use it in
-// CollisionSystem to dynamically make it appear or disappear
-type ObstacleObserver struct {
-	// we only have one obstacle so far, if we use multiple ones, turn
-	// this in to a map, see player_observer.go for an example
-	Entities map[ecs.Entity]int
-}
-
-// Create a  new resource of  type PlayerObserver which will  hold all
-// obstacle  entities.   We  also  add  a  Listener  which  looks  for
-// EntityRemoved events and  if a player gets removed,  we also remove
-// it from the Entity map in our observer.
-func NewObstacleObserver(world *ecs.World) {
-	observer := &ObstacleObserver{}
-	observer.Entities = make(map[ecs.Entity]int)
-
-	resmanger := generic.NewResource[ObstacleObserver](world)
-	resmanger.Add(observer)
-
-	listen := listener.NewCallback(
-		func(world *ecs.World, event ecs.EntityEvent) {
-			observerID := ecs.ResourceID[ObstacleObserver](world)
-			observer := world.Resources().Get(observerID).(*ObstacleObserver)
-			observer.RemoveEntity(event.Entity)
-		},
-
-		event.EntityRemoved,
-	)
-
-	world.SetListener(&listen)
-}
-
-func GetObstacleObserver(world *ecs.World) *ObstacleObserver {
-	observerID := ecs.ResourceID[ObstacleObserver](world)
-	observer := world.Resources().Get(observerID).(*ObstacleObserver)
-	return observer
-}
-
-func (observer *ObstacleObserver) AddEntity(entity ecs.Entity) {
-	observer.Entities[entity] = 1
-}
-
-func (observer *ObstacleObserver) RemoveEntity(entity ecs.Entity) {
-	observer.Entities = make(map[ecs.Entity]int)
-}

observers/particle_observer.go

@@ -1,53 +0,0 @@
-package observers
-
-import (
-	"github.com/mlange-42/arche/ecs"
-	"github.com/mlange-42/arche/ecs/event"
-	"github.com/mlange-42/arche/generic"
-	"github.com/mlange-42/arche/listener"
-)
-
-// will be added as  an ecs.Resource to the world so we  can use it in
-// CollisionSystem to dynamically make it appear or disappear
-type ParticleObserver struct {
-	// we only have one particle so far, if we use multiple ones, turn
-	// this in to a map, see player_observer.go for an example
-	Entity ecs.Entity
-}
-
-// Create a  new resource of  type PlayerObserver which will  hold all
-// player  entities.   We   also  add  a  Listener   which  looks  for
-// EntityRemoved events and  if a player gets removed,  we also remove
-// it from the Entity map in our observer.
-func NewParticleObserver(world *ecs.World) {
-	observer := &ParticleObserver{}
-
-	resmanger := generic.NewResource[ParticleObserver](world)
-	resmanger.Add(observer)
-
-	listen := listener.NewCallback(
-		func(world *ecs.World, event ecs.EntityEvent) {
-			observerID := ecs.ResourceID[ParticleObserver](world)
-			observer := world.Resources().Get(observerID).(*ParticleObserver)
-			observer.RemoveEntity(event.Entity)
-		},
-
-		event.EntityRemoved,
-	)
-
-	world.SetListener(&listen)
-}
-
-func GetParticleObserver(world *ecs.World) *ParticleObserver {
-	observerID := ecs.ResourceID[ParticleObserver](world)
-	observer := world.Resources().Get(observerID).(*ParticleObserver)
-	return observer
-}
-
-func (observer *ParticleObserver) AddEntity(entity ecs.Entity) {
-	observer.Entity = entity
-}
-
-func (observer *ParticleObserver) RemoveEntity(entity ecs.Entity) {
-	observer.Entity = ecs.Entity{}
-}

observers/player_observer.go

@@ -1,56 +0,0 @@
-package observers
-
-import (
-	"github.com/mlange-42/arche/ecs"
-	"github.com/mlange-42/arche/ecs/event"
-	"github.com/mlange-42/arche/generic"
-	"github.com/mlange-42/arche/listener"
-)
-
-// will be added as  an ecs.Resource to the world so we  can use it in
-// CollisionSystem  to check  for  player collisions.
-type PlayerObserver struct {
-	Entities map[ecs.Entity]int
-}
-
-// Create a  new resource of  type PlayerObserver which will  hold all
-// player  entities.   We   also  add  a  Listener   which  looks  for
-// EntityRemoved events and  if a player gets removed,  we also remove
-// it from the Entity map in our observer.
-func NewPlayerObserver(world *ecs.World) {
-	observer := &PlayerObserver{}
-	observer.Entities = make(map[ecs.Entity]int)
-
-	resmanger := generic.NewResource[PlayerObserver](world)
-	resmanger.Add(observer)
-
-	listen := listener.NewCallback(
-		func(world *ecs.World, event ecs.EntityEvent) {
-			observerID := ecs.ResourceID[PlayerObserver](world)
-			observer := world.Resources().Get(observerID).(*PlayerObserver)
-			observer.RemoveEntity(event.Entity)
-		},
-
-		event.EntityRemoved,
-	)
-
-	world.SetListener(&listen)
-}
-
-func GetPlayerObserver(world *ecs.World) *PlayerObserver {
-	observerID := ecs.ResourceID[PlayerObserver](world)
-	observer := world.Resources().Get(observerID).(*PlayerObserver)
-	return observer
-}
-
-func (observer *PlayerObserver) AddEntity(entity ecs.Entity) {
-	observer.Entities[entity] = 1
-}
-
-func (observer *PlayerObserver) RemoveEntity(entity ecs.Entity) {
-	delete(observer.Entities, entity)
-}
-
-func (observer *PlayerObserver) RemoveEntities() {
-	observer.Entities = make(map[ecs.Entity]int)
-}