openquell/systems/hud_system.go

package systems

import (
	"fmt"
	"openquell/assets"
	"openquell/observers"

	"github.com/hajimehoshi/ebiten/v2"
	"github.com/hajimehoshi/ebiten/v2/ebitenutil"
	"github.com/mlange-42/arche/ecs"
)

type HudSystem struct {
	World    *ecs.World
	Cellsize int
	Observer *observers.GameObserver
	Plan     *assets.RawLevel
}

func NewHudSystem(world *ecs.World, plan *assets.RawLevel) System {
	system := &HudSystem{
		Observer: observers.GetGameObserver(world),
		World:    world,
		Plan:     plan,
	}

	return system
}

func (system *HudSystem) Update() error {
	return nil
}

func (system *HudSystem) Draw(screen *ebiten.Image) {
	op := &ebiten.DrawImageOptions{}
	screen.DrawImage(assets.Assets["hud"], op)
	ebitenutil.DebugPrintAt(screen, fmt.Sprintf(
		"FPS: %02.f  TPS: %02.f      Level %s: %s",
		ebiten.ActualFPS(),
		ebiten.ActualTPS(),
		system.Plan.Name,
		system.Plan.Description,
	), 10, 10)

	ebitenutil.DebugPrintAt(screen, fmt.Sprintf("Score: %d", system.Observer.GetScore()), 10, 455)
}