automated snapshot

main.go

@@ -44,8 +44,8 @@ func main() {
 
 	// point at source center
 	// put source center at center of screen
-	var camera = TextureCam {
+	var camera = TextureCam{
-		LookAt: rl.Vector2 { X: float32(sourceWidth) / 2.0, Y: float32(sourceHeight) / 2.0 },
+		LookAt:       rl.Vector2{X: float32(sourceWidth) / 2.0, Y: float32(sourceHeight) / 2.0},
 		Zoom:         1.0,
 		SourceWidth:  sourceWidth,
 		SourceHeight: sourceHeight,
@@ -61,9 +61,9 @@ func main() {
 
 	field :=
 		TranslateField{
-				x: -float32(sourceWidth/2.0),
+			x: -float32(sourceWidth / 2.0),
-				y: -float32(sourceHeight/2.0),
+			y: -float32(sourceHeight / 2.0),
-				field: &ScaleField {
+			field: &ScaleField{
 				scale: 5.0,
 				field: &imageField,
 			},
@@ -75,11 +75,11 @@ func main() {
 	sketch := NewSketch()
 	//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("field", &FieldLayer{field: &field, dirty: true}, int32(sourceWidth), int32(sourceHeight))
 	sketch.CreateLayer("contours", &contourLayer, int32(sourceWidth), int32(sourceHeight))
 
 	ports := MakePorts()
-	ports["sierpinskiArrowAngle"] = Sine {
+	ports["sierpinskiArrowAngle"] = Sine{
 		Amp:  120,
 		Bias: 100,
 		Freq: 0.1,
@@ -126,7 +126,7 @@ func main() {
 			if c == 'c' {
 				resetCamera(&camera)
 			} else if c >= '1' && c <= '9' {
-				zoom := 1 << int(ch - '0')
+				zoom := 1 << int(ch-'0')
 				camera.Zoom = float32(zoom)
 			}
 		}
@@ -140,7 +140,7 @@ func main() {
 }
 
 func resetCamera(cam *TextureCam) {
-	cam.LookAt = rl.Vector2 { X: float32(cam.SourceWidth) / 2.0, Y: float32(cam.SourceHeight) / 2.0 }
+	cam.LookAt = rl.Vector2{X: float32(cam.SourceWidth) / 2.0, Y: float32(cam.SourceHeight) / 2.0}
 	cam.Zoom = 1.0
 }
 
@@ -150,7 +150,7 @@ type FieldLayer struct {
 }
 
 func (s *FieldLayer) Update(ctx *RenderCtx) {
-	;
+
 }
 
 func (s *FieldLayer) Draw(ctx *RenderCtx) {
@@ -171,30 +171,45 @@ func (s *FieldLayer) IsDirty() bool {
 type ContourLayer struct {
 	field                     Field
 	actors                    []*Actor
+	rng                       *rand.Rand
+	sourceWidth int
+	sourceHeight int
 }
 
 func NewContourLayer(rng *rand.Rand, field Field, sourceWidth int, sourceHeight int) ContourLayer {
 
-	actors := make([]*Actor, 20000)
+	actors := make([]*Actor, 0)
-	for i := range len(actors) {
+
-		x := rng.Int() % sourceWidth
+	layer := ContourLayer {
-		y := rng.Int() % sourceHeight
+		rng: rng,
-		actors[i] =
-			&Actor{
-				position: rl.Vector2 { X: float32(x), Y: float32(y) },
 		field: field,
+		actors:       actors,
+		sourceWidth:  sourceWidth,
+		sourceHeight: sourceHeight,
+	}
+
+	layer.AddActors(1)
+
+	return layer
+}
+
+func (s *ContourLayer) AddActors(n int) {
+	for range n {
+		x := s.rng.Int() % s.sourceWidth
+		y := s.rng.Int() % s.sourceHeight
+		newActor :=
+			&Actor {
+				position: rl.Vector2{X: float32(x), Y: float32(y)},
+				field:    s.field,
 				stepSize: 1,
 				color:    rl.NewColor(11, 35, 176, 100),
 			}
-	}
+		s.actors = append(s.actors, newActor)
-
-	return ContourLayer{
-		actors: actors,
 	}
 }
 
 func (s *ContourLayer) Update(ctx *RenderCtx) {
-	;
+	s.AddActors(100) // parameterize
 }
 
 func (s *ContourLayer) Draw(ctx *RenderCtx) {