Simon Schneegans
32 lines
1.1 KiB
GLSL
32 lines
1.1 KiB
GLSL
vec2 coords = cogl_tex_coord_in[0].st;
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coords.y = coords.y * (uOverShoot + 1.0) - uOverShoot * 0.5;
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// Get a cool matrix effect. See comments for those methods above.
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vec2 rainMask = getRain(coords);
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float textMask = getText(coords);
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// Get the window texture.
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cogl_color_out = texture2D(uTexture, coords);
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// Shell.GLSLEffect uses straight alpha. So we have to convert from premultiplied.
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if (cogl_color_out.a > 0) {
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cogl_color_out.rgb /= cogl_color_out.a;
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}
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// Fade the window according to the effect mask.
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cogl_color_out.a *= rainMask.y;
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// This is used to fade out the remaining trails in the end.
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float finalFade =
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1 - clamp((uProgress - FINAL_FADE_START_TIME) / (1 - FINAL_FADE_START_TIME), 0, 1);
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float rainAlpha = finalFade * rainMask.x;
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// Add the matrix effect to the window.
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vec4 text =
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vec4(mix(uTrailColor, uTipColor, min(1, pow(rainAlpha + 0.1, 4))), rainAlpha* textMask);
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cogl_color_out = alphaOver(cogl_color_out, text);
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// These are pretty useful for understanding how this works.
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// cogl_color_out = vec4(vec3(textMask), 1);
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// cogl_color_out = vec4(vec3(rainMask.x), 1);
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// cogl_color_out = vec4(vec3(rainMask.y), 1); |