24 lines
593 B
GLSL
24 lines
593 B
GLSL
/* Fragment shader dealing with transitions */
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uniform sampler2D currentScene;
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uniform sampler2D frozenScene;
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uniform sampler2D transMap;
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/* Normalized */
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uniform float prog;
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/* Vague [0, 512] normalized */
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uniform float vague;
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varying vec2 v_texCoord;
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void main()
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{
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float transV = texture2D(transMap, v_texCoord).r;
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float cTransV = clamp(transV, prog, prog+vague);
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float alpha = (cTransV - prog) / vague;
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vec4 newFrag = texture2D(currentScene, v_texCoord);
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vec4 oldFrag = texture2D(frozenScene, v_texCoord);
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gl_FragColor = mix(newFrag, oldFrag, alpha);
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}
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