🚚 Rename shader files

2022-05-27 21:21:05 +02:00
parent c90f3a1c97
commit 6a65d59144
13 changed files with 2 additions and 2 deletions
@@ -0,0 +1,59 @@
+//////////////////////////////////////////////////////////////////////////////////////////
+//          )                                                   (                       //
+//       ( /(   (  (               )    (       (  (  (         )\ )    (  (            //
+//       )\()) ))\ )(   (         (     )\ )    )\))( )\  (    (()/( (  )\))(  (        //
+//      ((_)\ /((_|()\  )\ )      )\  '(()/(   ((_)()((_) )\ )  ((_)))\((_)()\ )\       //
+//      | |(_|_))( ((_)_(_/(    _((_))  )(_))  _(()((_|_)_(_/(  _| |((_)(()((_|(_)      //
+//      | '_ \ || | '_| ' \))  | '  \()| || |  \ V  V / | ' \)) _` / _ \ V  V (_-<      //
+//      |_.__/\_,_|_| |_||_|   |_|_|_|  \_, |   \_/\_/|_|_||_|\__,_\___/\_/\_//__/      //
+//                                 |__/                                                 //
+//                       Copyright (c) 2021 Simon Schneegans                            //
+//          Released under the GPLv3 or later. See LICENSE file for details.            //
+//////////////////////////////////////////////////////////////////////////////////////////
+
+// The content from common.glsl is automatically prepended to each shader effect.
+
+uniform vec2 uSeed;
+uniform float uShake;
+uniform float uTwirl;
+uniform float uSuction;
+uniform float uRandomness;
+
+const float ACTOR_SCALE = 2.0;
+const float PADDING     = ACTOR_SCALE / 2.0 - 0.5;
+
+// The math for the whirling is inspired by this post:
+// http://www.geeks3d.com/20110428/shader-library-swirl-post-processing-filter-in-glsl
+void main() {
+  // We simply inverse the progress for opening windows.
+  float progress = uForOpening ? 1.0 - uProgress : uProgress;
+
+  // Choose a random suction center.
+  vec2 center = uSeed * uRandomness + 0.5 * (1.0 - uRandomness);
+  vec2 coords = cogl_tex_coord_in[0].st * ACTOR_SCALE - PADDING - center;
+
+  // Add some shaking.
+  coords.x +=
+    progress * 0.05 * uShake * sin((progress + uSeed.x) * (1.0 + uSeed.x) * uShake);
+  coords.y +=
+    progress * 0.05 * uShake * cos((progress + uSeed.y) * (1.0 + uSeed.y) * uShake);
+
+  // "Suck" the texture into the center.
+  float dist = length(coords) / sqrt(2);
+  coords += progress * coords / dist * 0.5 * uSuction;
+
+  // Apply some whirling.
+  float angle = pow(1.0 - dist, 2.0) * uTwirl * progress;
+  float s     = sin(angle);
+  float c     = cos(angle);
+  coords      = vec2(dot(coords, vec2(c, -s)), dot(coords, vec2(s, c)));
+
+  // Shell.GLSLEffect uses straight alpha. So we have to convert from premultiplied.
+  cogl_color_out = texture2D(uTexture, coords + center);
+  if (cogl_color_out.a > 0) {
+    cogl_color_out.rgb /= cogl_color_out.a;
+  }
+
+  // Fade out the window texture.
+  cogl_color_out.a *= 1.0 - progress;
+}