examples: add a glow effect to spirograph.v

kimshrier · Jul 5, 2024 · 56d2ba6 · 56d2ba6
1 parent 3ee95d1
commit 56d2ba6
Showing 1 changed file with 7 additions and 3 deletions.
diff --git a/examples/gg/spirograph.v b/examples/gg/spirograph.v
@@ -5,7 +5,7 @@ const pixel_count = 15000
 const p = 3
 const s = math.pi * 2 / f32(pixel_count)
 const color = gg.Color{255, 255, 255, 255}
-const background = gg.Color{20, 20, 64, 255}
+const background = gg.Color{20, 20, 64, 5}
 const colors = [
 	gg.Color{255, 255, 255, 255},
 	gg.Color{255, 0, 255, 255},
@@ -23,14 +23,18 @@ gg.start(
 	width: 900
 	height: 950
 	sample_count: 2
-	frame_fn: fn [mut k, mut scale] (ctx &gg.Context) {
+	frame_fn: fn [mut k, mut scale] (mut ctx gg.Context) {
 		wsize := gg.window_size()
 		ctx.begin()
+		ctx.draw_rect_filled(0, 0, wsize.width, wsize.height, gg.Color{10, 1, 30, 60})
 		t := f64(ctx.frame) / 300
 		d := math.sin(t)
 		if math.abs(d) < 0.0015 {
 			k++
 		}
+		if ctx.pressed_keys[int(gg.KeyCode._0)] {
+			ctx.frame = 475
+		}
 		if ctx.pressed_keys[int(gg.KeyCode.left)] {
 			k--
 		}
@@ -62,6 +66,6 @@ gg.start(
 		ctx.draw_text(wsize.width / 2 - 170, wsize.height - 15, 'frame: ${ctx.frame:06}, k: ${k:4}, scale: ${scale:4}, arrows to change',
 			color: colors[1]
 		)
-		ctx.end()
+		ctx.end(how: .passthru)
 	}
 )