Changes:

- use toggle tile for all toggling entities (transient, switch, door)
- get rod of hard coded sprites (exception: particle class, to be
  fixed later)
- changed switch sprite (rect instead of elipse)

util/ldtkhelpers.go

@@ -0,0 +1,48 @@
+package util
+
+import (
+	"openquell/config"
+
+	"github.com/solarlune/ldtkgo"
+)
+
+type TileSetSubRect struct {
+	X, Y, W, H int
+}
+
+func Map2Subrect(raw map[string]any) *TileSetSubRect {
+
+	// we need to translate this map for less typing
+	return &TileSetSubRect{
+		W: int(raw["w"].(float64)),
+		H: int(raw["h"].(float64)),
+		X: int(raw["x"].(float64)),
+		Y: int(raw["y"].(float64)),
+	}
+}
+
+func GetPropertyRef(entity *ldtkgo.Entity) string {
+	ref := entity.PropertyByIdentifier(config.LDTK_Entity_Ref)
+	if ref != nil {
+		if ref.Value != nil {
+			refid := ref.Value.(map[string]interface{})
+			ref := refid["entityIid"].(string)
+
+			if ref != "" {
+				return ref
+			}
+		}
+	}
+
+	return ""
+}
+
+func GetPropertyToggleTile(entity *ldtkgo.Entity) *TileSetSubRect {
+
+	ref := entity.PropertyByIdentifier(config.LDTK_Toggle_Tile)
+	if ref != nil {
+		return Map2Subrect(ref.AsMap())
+	}
+
+	return nil
+}