mirror of
https://github.com/photonstorm/phaser
synced 2024-12-25 12:33:38 +00:00
53 lines
2 KiB
JavaScript
53 lines
2 KiB
JavaScript
module.exports = [
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'#define SHADER_NAME PHASER_FORWARD_DIFFUSE_FS',
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'',
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'precision mediump float;',
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'',
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'struct Light',
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'{',
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' vec2 position;',
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' vec3 color;',
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' float intensity;',
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' float radius;',
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'};',
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'',
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'const int kMaxLights = %LIGHT_COUNT%;',
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'',
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'uniform vec4 uCamera; /* x, y, rotation, zoom */',
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'uniform vec2 uResolution;',
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'uniform sampler2D uMainSampler;',
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'uniform sampler2D uNormSampler;',
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'uniform vec3 uAmbientLightColor;',
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'uniform Light uLights[kMaxLights];',
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'uniform mat3 uInverseRotationMatrix;',
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'',
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'varying vec2 outTexCoord;',
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'varying vec4 outTint;',
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'',
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'void main()',
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'{',
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' vec3 finalColor = vec3(0.0, 0.0, 0.0);',
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' vec4 color = texture2D(uMainSampler, outTexCoord) * vec4(outTint.rgb * outTint.a, outTint.a);',
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' vec3 normalMap = texture2D(uNormSampler, outTexCoord).rgb;',
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' vec3 normal = normalize(uInverseRotationMatrix * vec3(normalMap * 2.0 - 1.0));',
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' vec2 res = vec2(min(uResolution.x, uResolution.y)) * uCamera.w;',
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'',
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' for (int index = 0; index < kMaxLights; ++index)',
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' {',
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' Light light = uLights[index];',
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' vec3 lightDir = vec3((light.position.xy / res) - (gl_FragCoord.xy / res), 0.1);',
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' vec3 lightNormal = normalize(lightDir);',
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' float distToSurf = length(lightDir) * uCamera.w;',
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' float diffuseFactor = max(dot(normal, lightNormal), 0.0);',
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' float radius = (light.radius / res.x * uCamera.w) * uCamera.w;',
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' float attenuation = clamp(1.0 - distToSurf * distToSurf / (radius * radius), 0.0, 1.0);',
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' vec3 diffuse = light.color * diffuseFactor;',
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' finalColor += (attenuation * diffuse) * light.intensity;',
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' }',
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'',
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' vec4 colorOutput = vec4(uAmbientLightColor + finalColor, 1.0);',
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'',
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' gl_FragColor = color * vec4(colorOutput.rgb * colorOutput.a, colorOutput.a);',
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'}',
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''
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].join('\n');
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