src/Shaders/Shaders_PBRFresnel_glsl.pxx

   1 // This file has been automatically generated from resource file src/Shaders/PBRFresnel.glsl
   2
   3 static const char Shaders_PBRFresnel_glsl[] =
   4   "//! Functions to calculate fresnel coefficient and approximate zero fresnel value.\n"
   5   "vec3 occPBRFresnel (in vec3  theBaseColor,\n"
   6   "                    in float theMetallic,\n"
   7   "                    in float theIOR)\n"
   8   "{\n"
   9   "  theIOR = (1.0 - theIOR) / (1.0 + theIOR);\n"
  10   "  theIOR *= theIOR;\n"
  11   "  vec3 f0 = vec3(theIOR);\n"
  12   "  f0 = mix (f0, theBaseColor.rgb, theMetallic);\n"
  13   "  return f0;\n"
  14   "}\n"
  15   "\n"
  16   "vec3 occPBRFresnel (in vec3  theBaseColor,\n"
  17   "                    in float theMetallic,\n"
  18   "                    in float theIOR,\n"
  19   "                    in float theCosVH)\n"
  20   "{\n"
  21   "  vec3 f0 = occPBRFresnel (theBaseColor, theMetallic, theIOR);\n"
  22   "  theCosVH = 1.0 - theCosVH;\n"
  23   "  theCosVH *= theCosVH;\n"
  24   "  theCosVH *= theCosVH * theCosVH * theCosVH * theCosVH;\n"
  25   "  return f0 + (vec3 (1.0) - f0) * theCosVH;\n"
  26   "}\n"
  27   "\n"
  28   "vec3 occPBRFresnel (in vec3  theBaseColor,\n"
  29   "                    in float theMetallic,\n"
  30   "                    in float theRoughness,\n"
  31   "                    in float theIOR,\n"
  32   "                    in float theCosV)\n"
  33   "{\n"
  34   "  vec3 f0 = occPBRFresnel (theBaseColor, theMetallic, theIOR);\n"
  35   "  theCosV = 1.0 - theCosV;\n"
  36   "  theCosV *= theCosV;\n"
  37   "  theCosV *= theCosV * theCosV * theCosV * theCosV;\n"
  38   "  return f0 + (max(vec3(1.0 - theRoughness), f0) - f0) * theCosV;\n"
  39   "}\n";