automated snapshot

main.go

@@ -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)
-	for i := range len(actors) {
-		x := rng.Int() % sourceWidth
-		y := rng.Int() % sourceHeight
-		actors[i] =
+	actors := make([]*Actor, 0)
+
+	layer := ContourLayer {
+		rng: rng,
+		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: field,
+				field:    s.field,
 				stepSize: 1,
 				color:    rl.NewColor(11, 35, 176, 100),
 			}
-	}
-
-	return ContourLayer{
-		actors: actors,
+		s.actors = append(s.actors, newActor)
 	}
 }
 
 func (s *ContourLayer) Update(ctx *RenderCtx) {
-	;
+	s.AddActors(100) // parameterize
 }
 
 func (s *ContourLayer) Draw(ctx *RenderCtx) {