automated snapshot

main.go

@@ -15,10 +15,17 @@ import (
 const (
 	targetWidth  = 800
 	targetHeight = 600
-	sourceScale  = 1
+	sourceScale  = 10
 	snapshotsDir = "snapshots"
 )
 
+type TextureCam struct {
+	SourceWidth int
+	SourceHeight int
+	LookAt rl.Vector2
+	Zoom float32
+}
+
 func main() {
 
 	sourceWidth  := sourceScale * targetWidth
@@ -32,7 +39,7 @@ func main() {
 		os.Exit(1)
 	}
 
-	rl.SetConfigFlags(rl.FlagWindowHighdpi & rl.FlagMsaa4xHint)
+	rl.SetConfigFlags(rl.FlagMsaa4xHint)
 	rl.InitWindow(targetWidth, targetHeight, "sumi sierpinski arrow")
 
 	log.Printf("screen=%dx%d render=%dx%d",
@@ -42,11 +49,11 @@ func main() {
 
 	// point at source center
 	// put source center at center of screen
-	var camera = rl.Camera2D {
-		Target:   rl.Vector2{X: float32(targetWidth) / 2, Y: float32(targetHeight) / 2},
-		Offset:   rl.Vector2{},
-		Zoom:     1.0,
-		Rotation: 0,
+	var camera = TextureCam {
+		LookAt: rl.Vector2 { X: float32(sourceWidth) / 2.0, Y: float32(sourceHeight) / 2.0 },
+		Zoom: 1.0,
+		SourceWidth: sourceWidth,
+		SourceHeight: sourceHeight,
 	}
 
 	/*
@@ -85,7 +92,6 @@ func main() {
 	}
 
 	for !rl.WindowShouldClose() {
-		updateCamera(&camera)
 
 		// begin drawing
 		t := time.Since(t0).Seconds()
@@ -98,9 +104,11 @@ func main() {
 			SourceHeight: int32(sourceHeight),
 			Time:         t,
 			Ports:        ports.Eval(t),
-			Cam:          camera,
+			Cam:          &camera,
 		}
 
+		sketch.Update(renderCtx)
+
 		/**
 		MAIN DRAWING
 		 **/
@@ -131,6 +139,7 @@ type FieldSketch struct {
 	Field Field
 }
 
+/*
 func (s *FieldSketch) Draw(ctx *RenderCtx) {
 	fmt.Printf("drawing field")
 	for x := range ctx.TargetWidth {
@@ -143,6 +152,7 @@ func (s *FieldSketch) Draw(ctx *RenderCtx) {
 		}
 	}
 }
+*/
 
 type ContourLayer struct {
 	field  Field
@@ -196,40 +206,6 @@ func RandRadialVec(rng *rand.Rand, minRadius float32, maxRadius float32, loAngle
 	return rl.Vector2{X: float32(r * math.Cos(rad)), Y: float32(r * math.Sin(rad))}
 }
 
-func updateCamera(camera *rl.Camera2D) {
-	// Get the world point that is under the mouse
-	mouseVec2 := rl.GetMousePosition()
-
-	if rl.IsMouseButtonDown(rl.MouseRightButton) {
-		// get mouse delta from last frame
-		delta := rl.GetMouseDelta()
-		// compute the amount to move scaled by the camera zoom
-		delta = rl.Vector2Scale(delta, -1.0/camera.Zoom)
-		delta.Y = -delta.Y
-		camera.Target = rl.Vector2Add(camera.Target, delta)
-	}
-	// Zoom based on mouse wheel
-	wheel := rl.GetMouseWheelMove()
-	if wheel != 0 {
-		mouseWorldPos := rl.GetScreenToWorld2D(mouseVec2, *camera)
-
-		// Set the offset to where the mouse is
-		camera.Offset = mouseVec2
-
-		// Set the target to match, so that the camera maps the world space point
-		// under the cursor to the screen space point under the cursor at any zoom
-		camera.Target = mouseWorldPos
-
-		// Zoom increment
-		const zoomIncrement float32 = 0.125
-
-		camera.Zoom += (wheel * zoomIncrement)
-		if camera.Zoom < zoomIncrement {
-			camera.Zoom = zoomIncrement
-		}
-	}
-}
-
 type Worm struct {
 	position   rl.Vector2
 	angles     []float32