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#ifndef PYMOL_WEBGL
#version 120
#else
precision highp float;
#endif
uniform sampler2D accumTex;
uniform sampler2D revealageTex;
uniform float isRight;
varying vec2 texcoordAttr;
#define texture texture2D
void main()
{
vec4 accum = texture(accumTex, texcoordAttr).rgba;
float r = accum.a;
#ifdef ANAGLYPH
// need to set two components because anaglyph masks out colors for each eye
#ifdef GLEW_VERSION_3_0
accum.a = texture(revealageTex, texcoordAttr).r;
#else
vec2 sum = texture(revealageTex, texcoordAttr).rg;
accum.a = (1.-isRight) * sum.x + isRight * sum.y;
#endif
#else
accum.a = texture(revealageTex, texcoordAttr).r;
#endif
gl_FragColor = vec4(accum.rgb / clamp(accum.a, 1e-4, 5e4), r);
}
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