Object target scale property

3 files changed, 52 insertions, 7 deletions

diff --git a/engine/CoreObjects/DynamicObject.go b/engine/CoreObjects/DynamicObject.go
index 0a10f0a..9b309dd 100644
--- a/engine/CoreObjects/DynamicObject.go
+++ b/engine/CoreObjects/DynamicObject.go
@@ -34,7 +34,35 @@ type DynamicObject struct {
 // represents one of those parts
 type TextureBlock struct {
 	Texture *rl.Texture2D
-	Offset rl.Vector2
+	// The space occupied by the sprite in world relative to the base object position
+	Window *rl.Rectangle
+
+	// The base rectangle of the texture (calculated once in the initialization step)
+	baseRect *rl.Rectangle
+}
+
+// Inintializes the texture block for futher render
+func (base *TextureBlock) init() {
+	base.baseRect = &rl.Rectangle{
+		X: 0,
+		Y: 0,
+		Height: float32(base.Texture.Height),
+		Width: float32(base.Texture.Width),
+	}
+}
+
+func (base *TextureBlock) draw(objPos *rl.Vector2) {
+	var targetWindow = rl.Rectangle {
+		X: base.Window.X + objPos.X,
+		Y: base.Window.Y + objPos.Y,
+		Width: base.Window.Width,
+		Height: base.Window.Height,
+	}
+	rl.DrawTexturePro(*base.Texture,
+		*base.baseRect,
+		targetWindow,
+		rl.Vector2Zero(),
+		0, rl.White)
 }
 
 type ColliderBlock struct {
@@ -47,6 +75,9 @@ func (base *DynamicObject) Init(manager *SceneManager) {
 		panic("Failed to initialize a dynamic object: the scene was not selected")
 	}
 	base.parentScene = manager.SelectedScene
+	for _, v := range base.Textures {
+		v.init()
+	}
 }
 
 func (base *DynamicObject) Destroy() {
@@ -88,10 +119,7 @@ func (base *DynamicObject) drawOverlay() {
 
 func (base *DynamicObject) Draw() {
 	for _, v := range base.Textures {
-		rl.DrawTexture(*v.Texture, 
-		int32(base.Position.X + v.Offset.X),
-		int32(base.Position.Y + v.Offset.Y),
-		rl.White)
+		v.draw(&base.Position)
 	}
 	if settings.State.DrawColliders {
 		for _, v := range base.Colliders {
diff --git a/engine/Dynamic/Descriptors/Objects.go b/engine/Dynamic/Descriptors/Objects.go
index 4dbee34..eb3fb78 100644
--- a/engine/Dynamic/Descriptors/Objects.go
+++ b/engine/Dynamic/Descriptors/Objects.go
@@ -49,9 +49,10 @@ func (base *ObjectDescriptor) parseTextures() []*coreobjects.TextureBlock {
 			rl.TraceLog(rl.LogWarning, "Failed to get the required by the object %s texture: %s", base.Name, err.Error())
 			continue
 		}
+
 		outp = append(outp, &coreobjects.TextureBlock {
 			Texture: texture,
-			Offset: v.Offset,
+			Window: v.getTargetWindow(texture),
 		})
 	}
 	return outp
@@ -85,6 +86,7 @@ type ObjectTextureBlock struct {
 	Name string
 	TextureId *uint64
 	Offset rl.Vector2
+	TargetScale *rl.Vector2
 }
 
 func (base *ObjectTextureBlock) GetTexture() (*rl.Texture2D, error) {
@@ -94,6 +96,21 @@ func (base *ObjectTextureBlock) GetTexture() (*rl.Texture2D, error) {
 	return components.Resources.Textures.GetTextureByName(base.Name)
 }
 
+// Calculates the target window of the tetxure block. Should be provided with its target texture
+func (base *ObjectTextureBlock) getTargetWindow(texture *rl.Texture2D) *rl.Rectangle {
+	var outp = &rl.Rectangle {
+		X: base.Offset.X,
+		Y: base.Offset.Y,
+		Width: float32(texture.Width),
+		Height: float32(texture.Height),
+	}
+	if base.TargetScale != nil {
+		outp.Width = base.TargetScale.X
+		outp.Height = base.TargetScale.Y
+	}
+	return outp
+}
+
 type ObjectColliderBlock struct {
 	Type string
 	Size rl.Vector2
diff --git a/engine/main.go b/engine/main.go
index 3b66d09..effc894 100644
--- a/engine/main.go
+++ b/engine/main.go
@@ -32,7 +32,7 @@ func main() {
 	log.Printf("Resource manager: %s", &components.Resources)
 
 	var manager = coreobjects.InitSceneManager()
-	// render.StartLoop(manager, components.Resources.Worlds["MainWorld"])
+	render.StartLoop(manager, components.Resources.Worlds["MainWorld"])
 	render.StartLoop(manager, builtin.MainMenu())
 }