automated snapshot

contour_layer.go

@@ -12,7 +12,7 @@ type ContourLayer struct {
 	rng    *rand.Rand
 }
 
-func NewContourLayer(sketch *Sketch, rng *rand.Rand, field Field) ContourLayer {
+func NewContourLayer(sketch *Sketch, rng *rand.Rand, field Field) *ContourLayer {
 
 	actors := make([]*Actor, 0)
 
@@ -24,7 +24,7 @@ func NewContourLayer(sketch *Sketch, rng *rand.Rand, field Field) ContourLayer {
 
 	layer.AddActors(1, sketch.sourceWidth, sketch.sourceHeight)
 
-	return layer
+	return &layer
 }
 
 func (s *ContourLayer) AddActors(n, sourceWidth, sourceHeight int32) {

field.go

@@ -28,7 +28,7 @@ type TranslateField struct {
 	x, y  float32
 }
 
-func (f *TranslateField) Get(x, y float32) float32 {
+func (f TranslateField) Get(x float32, y float32) float32 {
 	return f.field.Get(x+f.x, y+f.y)
 }
 
@@ -65,7 +65,7 @@ func (p *ImagePixels) Get(x, y int) rl.Color {
 	return p.colors[x+y*p.w]
 }
 
-func NewImageField(path string) ImageField {
+func NewImageField(path string) *ImageField {
 	image := rl.LoadImage(path)
 	fmt.Printf("loaded image from %s\n", path)
 	colors := rl.LoadImageColors(image)
@@ -76,7 +76,7 @@ func NewImageField(path string) ImageField {
 	}
 	offsetX := int(image.Width)/2
 	offsetY := int(image.Height)/2
-	return ImageField{
+	return &ImageField {
 		image:   image,
 		pixels:  pixels,
 		offsetX: offsetX,

main.go

@@ -42,51 +42,31 @@ func main() {
 
 	BlendModeToggleGroupActive := int32(0)
 
-	Slider003Value := float32(0.0)
-
-	RTogglePressed := false
-	GTogglePressed := false
-	BTogglePressed := false
-
-	Slider008Value := float32(0.0)
-	Slider009Value := float32(0.0)
-	Slider010Value := float32(0.0)
-
-	ATogglePressed := false
-	SaturationTogglePressed := false
-
-	SaturationSliderValue := float32(0.0)
-	KSliderValue := float32(0.0)
-	KTogglePressed := false
-	// end layout vars
-
 	rl.SetTargetFPS(60)
 	t0 := time.Now()
 
 	/*
 	 */
 
+	rng := rand.New(rand.NewSource(0))
 	imageField := NewImageField("/home/d/Dropbox/art/passage/data/david.png")
-
 	field :=
-		TranslateField{
+		&TranslateField {
 			x: -float32(sourceWidth / 2.0),
 			y: -float32(sourceHeight / 2.0),
 			field: &ScaleField{
 				scale: 4.0,
-				field: &imageField,
+				field: imageField,
 			},
 		}
-	rng := rand.New(rand.NewSource(0))
-
 
 	sketch := NewSketch(sourceWidth, sourceHeight)
 
-	contourLayer := NewContourLayer(&sketch, rng, &field)
+	contourLayer := NewContourLayer(&sketch, rng, field)
 	//sketch.CreateLayer("testPattern", &TestPattern{}, int32(sourceWidth), int32(sourceHeight))
 	//sketch.CreateLayer("actors", &contourLayer, int32(sourceWidth), int32(sourceHeight))
 	//sketch.CreateLayer("field", &FieldLayer{field: &field, dirty: true}, int32(sourceWidth), int32(sourceHeight))
-	sketch.CreateLayer("contours", &contourLayer)
+	sketch.CreateLayer("contours", contourLayer)
 
 	ports := MakePorts()
 	ports["sierpinskiArrowAngle"] = Sine {
@@ -156,34 +136,31 @@ func main() {
 		gui.GroupBox(rl.Rectangle{X: 20, Y: 20, Width: controlPanelWidth - 50, Height: 60 }, "Blending")
 		BlendModeToggleGroupActive = gui.ToggleGroup(rl.Rectangle{X: 30, Y: 40, Width: (controlPanelWidth - 70) / 3.0, Height: 24}, "ONE;TWO;THREE", BlendModeToggleGroupActive)
 
-		gui.Label(rl.Rectangle{X: 20, Y: 90, Width: 120, Height: 24}, "Contour Layer")
+		for _, layerTools := range sketch.layerToolsOrdered {
 
-		ATogglePressed = gui.LabelButton(rl.Rectangle{X: 40, Y: 136, Width: 16, Height: 16}, "A")
+			config := layerTools.config
-		Slider003Value = gui.Slider(rl.Rectangle{X: 64, Y: 136, Width: 264, Height: 16}, "", "", Slider003Value, 0, 255)
 
-		RTogglePressed = gui.LabelButton(rl.Rectangle{X: 40, Y: 160, Width: 16, Height: 16}, "R")
+			gui.Label(rl.Rectangle{X: 20, Y: 90, Width: 120, Height: 24}, layerTools.name)
-		Slider008Value = gui.Slider(rl.Rectangle{X: 64, Y: 160, Width: 264, Height: 16}, "", "", Slider008Value, 0, 100)
 
-		GTogglePressed = gui.LabelButton(rl.Rectangle{X: 40, Y: 184, Width: 16, Height: 16}, "G")
+			config.visible = gui.Toggle(rl.Rectangle{X: 40, Y: 136, Width: 16, Height: 16}, "A", config.visible)
-		Slider009Value = gui.Slider(rl.Rectangle{X: 64, Y: 184, Width: 264, Height: 16}, "", "", Slider009Value, 0, 100)
+			config.a = uint8(gui.Slider(rl.Rectangle{X: 64, Y: 136, Width: 264, Height: 16}, "", "", float32(config.a), 0, 255))
 
-		BTogglePressed = gui.LabelButton(rl.Rectangle{X: 40, Y: 208, Width: 16, Height: 16}, "B")
+			config.rVisible = gui.Toggle(rl.Rectangle{X: 40, Y: 160, Width: 16, Height: 16}, "R", config.rVisible)
-		Slider010Value = gui.Slider(rl.Rectangle{X: 64, Y: 208, Width: 264, Height: 16}, "", "", Slider010Value, 0, 100)
+			config.r = uint8(gui.Slider(rl.Rectangle{X: 64, Y: 160, Width: 264, Height: 16}, "", "", float32(config.r), 0, 255))
 
-		SaturationTogglePressed = gui.LabelButton(rl.Rectangle{X: 40, Y: 232, Width: 16, Height: 16}, "S")
+			config.gVisible = gui.Toggle(rl.Rectangle{X: 40, Y: 184, Width: 16, Height: 16}, "G", config.gVisible)
+			config.g = uint8(gui.Slider(rl.Rectangle{X: 64, Y: 184, Width: 264, Height: 16}, "", "", float32(config.g), 0, 255))
 
-		gui.Slider(rl.Rectangle{X: 64, Y: 232, Width: 264, Height: 16}, "", "", SaturationSliderValue, 0, 100)
+			config.bVisible = gui.Toggle(rl.Rectangle{X: 40, Y: 208, Width: 16, Height: 16}, "B", config.bVisible)
-		gui.Slider(rl.Rectangle{X: 64, Y: 256, Width: 264, Height: 16}, "", "", KSliderValue, 0, 100)
+			config.b = uint8(gui.Slider(rl.Rectangle{X: 64, Y: 208, Width: 264, Height: 16}, "", "", float32(config.b), 0, 255))
 
-		KTogglePressed = gui.LabelButton(rl.Rectangle{X: 40, Y: 256, Width: 16, Height: 16}, "K")
+			config.desaturate = !gui.Toggle(rl.Rectangle{X: 40, Y: 232, Width: 16, Height: 16}, "S", !config.desaturate)
+			config.saturation = gui.Slider(rl.Rectangle{X: 64, Y: 232, Width: 264, Height: 16}, "", "", config.saturation, 0, 100)
 
-		// NOTE: LabelButton returns "pressed this frame" bool, so these are edge-triggered.
+			gui.Label(rl.Rectangle{X: 40, Y: 256, Width: 16, Height: 16}, "S")
-		_ = RTogglePressed
+			config.kValue = gui.Slider(rl.Rectangle{X: 64, Y: 256, Width: 264, Height: 16}, "", "", config.kValue, 0, 2)
-		_ = GTogglePressed
+
-		_ = BTogglePressed
+		}
-		_ = ATogglePressed
-		_ = SaturationTogglePressed
-		_ = KTogglePressed
 
 		rl.EndDrawing()
 

shaders/saturation.fs

@@ -0,0 +1,21 @@
+#version 330
+
+in vec2 fragTexCoord;
+in vec4 fragColor;
+
+uniform sampler2D texture0;
+uniform float uSat;   // 0 = grayscale, 1 = original, >1 = boosted
+
+out vec4 finalColor;
+
+void main() {
+    vec4 c = texture(texture0, fragTexCoord) * fragColor;
+
+    // luminance (perceptual-ish)
+    float l = dot(c.rgb, vec3(0.2126, 0.7152, 0.0722));
+    vec3 gray = vec3(l);
+
+    c.rgb = mix(gray, c.rgb, uSat);
+    finalColor = c; // preserves alpha
+}
+

sketch.go

@@ -9,9 +9,9 @@ type Sketch struct {
 	sourceWidth int32
 	sourceHeight int32
 	cam          *TextureCam
-	layerTools map[string]LayerTools
-	layerToolsOrdered []LayerTools
 	composite rl.RenderTexture2D
+	layerTools map[string]*LayerTools
+	layerToolsOrdered []*LayerTools
 }
 
 type TextureCam struct {
@@ -19,6 +19,35 @@ type TextureCam struct {
 	Zoom         float32
 }
 
+/** RenderCtx **/
+type RenderCtx struct {
+	TargetBounds rl.Rectangle
+	SourceWidth  int32
+	SourceHeight int32
+	Time         float64
+	Ports        map[string]float64
+}
+
+type LayerTools struct {
+	name    string
+	layer   Layer
+	texture rl.RenderTexture2D
+	config  *LayerConfig
+}
+
+type LayerConfig struct {
+	visible bool
+	a uint8
+	rVisible bool
+	r uint8
+	gVisible bool
+	g uint8
+	bVisible bool
+	b uint8
+	desaturate bool
+	saturation float32
+	kValue float32
+}
 
 func NewSketch(sourceWidth, sourceHeight int32) Sketch {
 
@@ -32,8 +61,8 @@ func NewSketch(sourceWidth, sourceHeight int32) Sketch {
 	return Sketch {
 		sourceWidth: sourceWidth,
 		sourceHeight: sourceHeight,
-		layerTools: make(map[string]LayerTools),
+		layerTools: make(map[string]*LayerTools),
-		layerToolsOrdered: []LayerTools {},
+		layerToolsOrdered: []*LayerTools {},
 		composite: rl.LoadRenderTexture(sourceWidth, sourceHeight),
 		cam: &camera,
 	}
@@ -41,25 +70,30 @@ func NewSketch(sourceWidth, sourceHeight int32) Sketch {
 
 func (s *Sketch) CreateLayer(name string, layer Layer) {
 	texture := rl.LoadRenderTexture(s.sourceWidth, s.sourceHeight)
-	layerTools := LayerTools {
+	rl.GenTextureMipmaps(&texture.Texture)
+	rl.SetTextureFilter(texture.Texture, rl.FilterTrilinear)
+	config := NewLayerConfig()
+	layerTools :=
+		LayerTools {
 			name:    name,
-		texture: &texture,
+			texture: texture,
 			layer:   layer,
-		config: NewLayerConfig(),
+			config:  &config,
 		}
-	s.layerToolsOrdered = append(s.layerToolsOrdered, layerTools)
+	s.layerToolsOrdered = append(s.layerToolsOrdered, &layerTools)
-	s.layerTools[name] = layerTools
+	s.layerTools[name] = &layerTools
 }
 
 func (s *Sketch) Draw(ctx *RenderCtx) {
 	// render onto all layer textures
 	for _, instance := range s.layerToolsOrdered {
-		instance.layer.Update(ctx)
 		layer := instance.layer
+		layer.Update(ctx)
 		if instance.layer.IsDirty() {
-			rl.BeginTextureMode(*instance.texture)
+			rl.BeginTextureMode(instance.texture)
 			layer.Draw(ctx)
 			rl.EndTextureMode()
+			rl.GenTextureMipmaps(&instance.texture.Texture)
 		}
 	}
 
@@ -84,7 +118,23 @@ func (s *Sketch) Draw(ctx *RenderCtx) {
 	rl.BeginTextureMode(s.composite)
 	rl.ClearBackground(rl.Black)
 	for _, instance := range s.layerToolsOrdered {
-		rl.DrawTexturePro(instance.texture.Texture, src, dst, rl.Vector2{}, 0, rl.White)
+		config := instance.config
+		if config.visible {
+			var r uint8
+			if config.rVisible {
+				r = config.r
+			}
+			var g uint8
+			if config.gVisible {
+				g = config.g
+			}
+			var b uint8
+			if config.bVisible {
+				b = config.b
+			}
+			tint := rl.NewColor(r, g, b, config.a)
+			rl.DrawTexturePro(instance.texture.Texture, src, dst, rl.Vector2{}, 0, tint)
+		}
 	}
 	rl.EndTextureMode()
 
@@ -191,12 +241,6 @@ func (s *Sketch) Capture() *SketchCapture {
 }
 
 
-type LayerTools struct {
-	name    string
-	layer   Layer
-	texture *rl.RenderTexture2D
-	config LayerConfig
-}
 
 func NewLayerConfig() LayerConfig {
 	return LayerConfig {
@@ -213,28 +257,6 @@ func NewLayerConfig() LayerConfig {
 	}
 }
 
-type LayerConfig struct {
-
-	visible bool
-	a uint8
-
-	rVisible bool
-	r uint8
-
-	gVisible bool
-	g uint8
-
-	
-	bVisible bool
-	b uint8
-
-	
-	desaturate bool
-	saturation float32
-	
-	kValue float32
-}
-
 /** Layer **/
 
 type Layer interface {
@@ -297,13 +319,3 @@ func (p Ports) Eval(t float64) map[string]float64 {
 	}
 	return out
 }
-
-/** RenderCtx **/
-
-type RenderCtx struct {
-	TargetBounds rl.Rectangle
-	SourceWidth  int32
-	SourceHeight int32
-	Time         float64
-	Ports        map[string]float64
-}