mirror of
https://github.com/photonstorm/phaser
synced 2025-01-12 05:08:54 +00:00
36 lines
948 B
JavaScript
36 lines
948 B
JavaScript
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module.exports = [
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'#define SHADER_NAME SHADOW_FS',
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'',
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'precision mediump float;',
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'',
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'uniform sampler2D uMainSampler;',
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'uniform vec2 lightPosition;',
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'uniform vec4 shadowColor;',
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'uniform float decay;',
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'uniform float power;',
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'uniform float intensity;',
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'',
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'varying vec2 outTexCoord;',
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'',
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'const int SAMPLES = __SAMPLES__;',
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'',
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'void main ()',
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'{',
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' vec4 texture = texture2D(uMainSampler, outTexCoord);',
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'',
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' vec2 pc = (lightPosition - outTexCoord) * intensity;',
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'',
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' float shadow = 0.0;',
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'',
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' for (int i = 0; i < SAMPLES; ++i)',
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' {',
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' shadow += texture2D(uMainSampler, outTexCoord + float(i) * decay / float(SAMPLES) * pc).a * power;',
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' }',
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'',
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' float mask = 1.0 - texture.a;',
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'',
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' gl_FragColor = mix(texture, shadowColor, shadow * mask);',
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'}',
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''
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].join('\n');
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