automated snapshot

main.go

@@ -62,11 +62,12 @@ func main() {
 
 	imageLayer := NewImageLayer("/home/d/Dropbox/photos/Events/2025/Aurora/Photo Nov 11 2025, 9 52 03 PM.jpg")
 
+	sketch.AddColorLayer("background-black", rl.Black)
+	sketch.AddLayer("field", &FieldLayer{field: field, dirty: true})
 	contourLayer := NewContourLayer(&sketch, rng, field)
-	sketch.CreateLayer("field", &FieldLayer{field: field, dirty: true})
-	sketch.CreateLayer("contours", contourLayer)
-	sketch.CreateLayer("sierpinski", sierpinskiLayer)
-	sketch.CreateLayer("aurora", imageLayer)
+	sketch.AddLayer("contours", contourLayer)
+	sketch.AddLayer("sierpinski", sierpinskiLayer)
+	sketch.AddLayer("aurora", imageLayer)
 
 	ports := MakePorts()
 	ports["sierpinskiArrowAngle"] =
@@ -76,7 +77,6 @@ func main() {
 			Bias: 60,
 		}
 
-
 	ports["sierpinskiArrowDepth"] =
 		Const {
 			V: 6,

sketch.go

@@ -68,7 +68,7 @@ func NewSketch(sourceWidth, sourceHeight int32) Sketch {
 	}
 }
 
-func (s *Sketch) CreateLayer(name string, layer Layer) {
+func (s *Sketch) AddLayer(name string, layer Layer) {
 	texture := rl.LoadRenderTexture(s.sourceWidth, s.sourceHeight)
 	config := NewLayerConfig()
 	layerTools :=
@@ -82,6 +82,14 @@ func (s *Sketch) CreateLayer(name string, layer Layer) {
 	s.layerTools[name] = &layerTools
 }
 
+func (s *Sketch) AddColorLayer(name string, c rl.Color) {
+	colorLayer := &ColorLayer {
+		color: c,
+		dirty: true,
+	}
+	s.AddLayer(name, colorLayer)
+}
+
 func (s *Sketch) Draw(ctx *RenderCtx) {
 	// render onto all layer textures
 	for _, instance := range s.layerToolsOrdered {
@@ -265,6 +273,22 @@ type Layer interface {
 	IsDirty() bool
 }
 
+type ColorLayer struct {
+	color rl.Color
+	dirty bool
+}
+
+func (cl *ColorLayer) Update(ctx *RenderCtx) {
+	;
+}
+
+func (cl *ColorLayer) Draw(ctx *RenderCtx) {
+	rl.DrawRectangle(0, 0, ctx.SourceWidth, ctx.SourceHeight, cl.color)
+}
+
+func (cl *ColorLayer) IsDirty() bool {
+	return cl.dirty
+}
 
 type ImageLayer struct {
 	texture rl.Texture2D
@@ -293,7 +317,6 @@ func (il *ImageLayer) IsDirty() bool {
 	return il.dirty
 }
 
-
 type TestPattern struct{
 	dirty bool
 }