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static const char *fragShaderText =
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"uniform bool fragface; \n"
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" if (!fragface || gl_FrontFacing) { \n"
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" gl_FragColor = gl_Color; \n"
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" gl_FragColor = 0.8 * gl_SecondaryColor; \n"
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" bool f = gl_FrontFacing; \n"
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" gl_FragColor = vec4(1.0, 0.0, 0.0, 0.0); \n"