automated snapshot

field.go

@@ -90,3 +90,36 @@ func (f *ImageField) Get(x, y float32) float32 {
 	c := f.pixels.Get(int(x+float32(f.offsetX)), int(y+float32(f.offsetY)))
 	return Brightness(c)
 }
+
+
+/** LAYER HELPERS **/
+
+type FieldLayer struct {
+	field Field
+	loColor rl.Color
+	hiColor rl.Color
+	dirty bool
+}
+
+func (fl *FieldLayer) Update(ctx *RenderCtx) {
+	;
+}
+
+func (fl *FieldLayer) Draw(ctx *RenderCtx) {
+	rl.ClearBackground(rl.Blank)
+	rl.BeginBlendMode(rl.BlendAlphaPremultiply)
+	for x := range ctx.SourceWidth {
+		for y := range ctx.SourceHeight {
+			v := fl.field.Get(float32(x), float32(y))
+			clr := LerpCurve(v, 1.3, fl.loColor, fl.hiColor)
+			rl.DrawPixel(x, y, clr)
+		}
+	}
+	rl.EndBlendMode()
+	fl.dirty = false
+}
+
+func (fl *FieldLayer) IsDirty() bool {
+	return fl.dirty
+}
+