automated snapshot

sketch.go

@@ -127,8 +127,40 @@ func (s *Sketch) Draw(ctx *RenderCtx) {
 	}
 
 	viewport := s.CalcViewport(ctx)
+	outputRect := s.calcOutputRectKeepingAspectRatio(ctx)
+
+	x := float32(0)
+	y := float32(0)
+	w := outputRect.Width
+	h := outputRect.Height
+	rl.PushMatrix()
+	rl.Translatef(outputRect.X, outputRect.Y, 0)
+	rl.BeginScissorMode(int32(outputRect.X), int32(outputRect.Y), int32(outputRect.Width), int32(outputRect.Height))
+	checkSize := float32(25.0)
+	grey := rl.NewColor(220, 220, 220, 255)
+	cellX := 0
+	cellY := 0
+	for y < h {
+		x = 0
+		cellX = 0
+		for x < w {
+			c := rl.White
+			if ((cellX + cellY) & 1) == 1 {
+				c = grey
+			}
+			rl.DrawRectangle(int32(x), int32(y), int32(checkSize), int32(checkSize), c)
+			x += checkSize
+			cellX++
+		}
+		y += checkSize
+		cellY++
+	}
+	rl.EndScissorMode()
+	rl.PopMatrix()
+
 
 	rl.BeginBlendMode(rl.BlendAlphaPremultiply)
+	//rl.BeginBlendMode(rl.BlendAlpha)
 	rl.BeginTextureMode(s.composite)
 	rl.ClearBackground(rl.Blank)
 	//rl.ClearBackground(rl.Black)
@@ -147,6 +179,9 @@ func (s *Sketch) Draw(ctx *RenderCtx) {
 			if config.bVisible {
 				b = config.b
 			}
+			r = uint8(float32(r) * (float32(config.a) / 255.0))
+			g = uint8(float32(g) * (float32(config.a) / 255.0))
+			b = uint8(float32(b) * (float32(config.a) / 255.0))
 			tint := rl.NewColor(r, g, b, config.a)
 			rl.DrawTexturePro(instance.texture.Texture, src, dst, rl.Vector2{}, 0, tint)
 		}
@@ -157,7 +192,6 @@ func (s *Sketch) Draw(ctx *RenderCtx) {
 	rl.GenTextureMipmaps(&s.composite.Texture)
 	rl.SetTextureFilter(s.composite.Texture, rl.FilterTrilinear)
 
-	outputRect := s.calcOutputRectKeepingAspectRatio(ctx)
 	rl.DrawTexturePro(s.composite.Texture, viewport, outputRect, rl.Vector2{}, 0, rl.White)
 
 	outlineRect := outputRect.ToInt32()