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https://git.dev.opencascade.org/repos/occt.git
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b470ebea04
Graphic3d_ShaderManager - Phong shading now uses World space calculations. OpenGl_ShaderManager::pushLightSourceState() - fixed unnormalized direction of headlight source.
40 lines
1.6 KiB
Plaintext
40 lines
1.6 KiB
Plaintext
// This file has been automatically generated from resource file src/Shaders/PhongPointLight.glsl
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static const char Shaders_PhongPointLight_glsl[] =
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"//! Function computes contribution of isotropic point light source\n"
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"//! into global variables Diffuse and Specular (Phong shading).\n"
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"//! @param theId light source index\n"
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"//! @param theNormal surface normal\n"
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"//! @param theView view direction\n"
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"//! @param thePoint 3D position (world space)\n"
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"//! @param theIsFront front/back face flag\n"
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"void occPointLight (in int theId,\n"
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" in vec3 theNormal,\n"
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" in vec3 theView,\n"
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" in vec3 thePoint,\n"
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" in bool theIsFront)\n"
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"{\n"
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" vec3 aLight = occLight_Position (theId) - thePoint;\n"
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"\n"
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" float aDist = length (aLight);\n"
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" float aRange = occLight_Range (theId);\n"
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" float anAtten = occPointLightAttenuation (aDist, aRange, occLight_LinearAttenuation (theId), occLight_ConstAttenuation (theId));\n"
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" if (anAtten <= 0.0) return;\n"
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" aLight /= aDist;\n"
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"\n"
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" vec3 aHalf = normalize (aLight + theView);\n"
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"\n"
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" vec3 aFaceSideNormal = theIsFront ? theNormal : -theNormal;\n"
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" float aNdotL = max (0.0, dot (aFaceSideNormal, aLight));\n"
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" float aNdotH = max (0.0, dot (aFaceSideNormal, aHalf ));\n"
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"\n"
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" float aSpecl = 0.0;\n"
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" if (aNdotL > 0.0)\n"
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" {\n"
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" aSpecl = pow (aNdotH, occMaterial_Shininess (theIsFront));\n"
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" }\n"
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"\n"
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" Diffuse += occLight_Diffuse (theId) * aNdotL * anAtten;\n"
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" Specular += occLight_Specular(theId) * aSpecl * anAtten;\n"
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"}\n";
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