//This file is automatically rebuilt by the Cesium build process.
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export default "/**\n\
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* Compositing for Weighted Blended Order-Independent Transparency. See:\n\
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* - http://jcgt.org/published/0002/02/09/\n\
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* - http://casual-effects.blogspot.com/2014/03/weighted-blended-order-independent.html\n\
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*/\n\
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\n\
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uniform sampler2D u_opaque;\n\
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uniform sampler2D u_accumulation;\n\
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uniform sampler2D u_revealage;\n\
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\n\
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varying vec2 v_textureCoordinates;\n\
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\n\
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void main()\n\
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{\n\
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vec4 opaque = texture2D(u_opaque, v_textureCoordinates);\n\
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vec4 accum = texture2D(u_accumulation, v_textureCoordinates);\n\
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float r = texture2D(u_revealage, v_textureCoordinates).r;\n\
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\n\
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#ifdef MRT\n\
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vec4 transparent = vec4(accum.rgb / clamp(r, 1e-4, 5e4), accum.a);\n\
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#else\n\
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vec4 transparent = vec4(accum.rgb / clamp(accum.a, 1e-4, 5e4), r);\n\
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#endif\n\
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\n\
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gl_FragColor = (1.0 - transparent.a) * transparent + transparent.a * opaque;\n\
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\n\
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if (opaque != czm_backgroundColor)\n\
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{\n\
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gl_FragColor.a = 1.0;\n\
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}\n\
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}\n\
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";
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