phaser
Version:
A fast, free and fun HTML5 Game Framework for Desktop and Mobile web browsers from the team at Phaser Studio Inc.
32 lines (31 loc) • 1.08 kB
JavaScript
module.exports = [
'#pragma phaserTemplate(shaderName)',
'precision mediump float;',
'uniform sampler2D uMainSampler;',
'varying vec2 outTexCoord;',
'uniform vec2 lightPosition;',
'uniform vec4 color;',
'uniform float decay;',
'uniform float power;',
'uniform float intensity;',
'uniform int samples;',
'const int MAX = 12;',
'#pragma phaserTemplate(fragmentHeader)',
'void main ()',
'{',
' vec4 texture = boundedSampler(uMainSampler, outTexCoord);',
' vec2 pc = (lightPosition - outTexCoord) * intensity;',
' float shadow = 0.0;',
' float limit = max(float(MAX), float(samples));',
' for (int i = 0; i < MAX; ++i)',
' {',
' if (i >= samples)',
' {',
' break;',
' }',
' shadow += boundedSampler(uMainSampler, outTexCoord + float(i) * decay / limit * pc).a * power;',
' }',
' float mask = 1.0 - texture.a;',
' gl_FragColor = mix(texture, color, clamp(shadow * mask, 0.0, 1.0));',
'}',
].join('\n');