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0024310: TKOpenGl - GLSL compatibility issues
Lights defintion clean up: - remove duplicated enumeration TLightType (equals to Visual3d_TypeOfLightSource) - remove unused fields from Graphic3d_CLight - OpenGl_Light, reuse Graphic3d_CLight definition Phong GLSL program: - move out cumulative ambient light intencity from limited list of lights - compatibility issues, replace array of structures (light sources, materials, clipping planes) with arrays of primitive types New Draw Harness command vlight to alter light sources definition. OpenGl_ShaderProgram::Initialize() - add missing Linker log
This commit is contained in:
kgv
abv
@@ -1,192 +1,79 @@
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#define _OCC_MAX_LIGHTS_ 8
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// This files includes definition of common uniform variables in OCCT GLSL programs
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#define _OCC_MAX_CLIP_PLANES_ 8
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//! OCCT ambient light source.
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const int occAmbientLight = 0;
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//! OCCT directional light source.
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const int occDirectLight = 1;
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//! OCCT isotropic point light source.
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const int occPointLight = 2;
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//! OCCT spot light source.
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const int occSpotLight = 3;
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//! Parameters of OCCT light source.
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struct occLightSource
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{
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//! Type of light source.
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int Type;
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//! Is light a headlight?
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int Head;
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//! Ambient intensity.
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vec3 Ambient;
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//! Diffuse intensity.
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vec3 Diffuse;
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//! Specular intensity.
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vec3 Specular;
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//! Position of light source.
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vec3 Position;
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//! Direction of the spot light.
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vec3 SpotDirection;
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//! Maximum spread angle of the spot light (in radians).
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float SpotCutoff;
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//! Attenuation of the spot light intensity (from 0 to 1).
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float SpotExponent;
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//! Const attenuation factor of positional light source.
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float ConstAttenuation;
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//! Linear attenuation factor of positional light source.
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float LinearAttenuation;
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};
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//! Parameters of OCCT material.
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struct occMaterialParams
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{
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//! Emission color.
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vec4 Emission;
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//! Ambient reflection.
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vec4 Ambient;
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//! Diffuse reflection.
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vec4 Diffuse;
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//! Specular reflection.
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vec4 Specular;
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//! Specular exponent.
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float Shininess;
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//! Transparency coefficient.
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float Transparency;
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};
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//! OCCT view-space clipping plane.
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const int occEquationCoordsView = 0;
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//! OCCT world-space clipping plane.
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const int occEquationCoordsWorld = 1;
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//! Parameters of OCCT clipping plane.
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struct occClipPlane
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{
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//! Plane equation.
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vec4 Equation;
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//! Equation space.
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int Space;
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};
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#ifdef VERTEX_SHADER
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/////////////////////////////////////////////////////////////////////
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// OCCT vertex attributes
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#define THE_MAX_LIGHTS 8
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#define THE_MAX_CLIP_PLANES 8
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// Vertex attributes
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// Note: At the moment, we just 'rename' the default OpenGL
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// vertex attributes from compatibility profile. In the next
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// release old functionality will be removed from shader API.
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//! Vertex color.
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#define occColor gl_Color
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//! Normal coordinates.
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#define occNormal gl_Normal
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//! Vertex coordinates.
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#define occVertex gl_Vertex
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//! Texture coordinates.
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#define occTexCoord gl_MultiTexCoord0
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#ifdef VERTEX_SHADER
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#define occColor gl_Color //!< Vertex color
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#define occNormal gl_Normal //!< Normal coordinates
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#define occVertex gl_Vertex //!< Vertex coordinates
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#define occTexCoord gl_MultiTexCoord0 //!< Texture coordinates
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#endif
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/////////////////////////////////////////////////////////////////////
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// OCCT matrix state
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// Matrix state
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uniform mat4 occWorldViewMatrix; //!< World-view matrix
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uniform mat4 occProjectionMatrix; //!< Projection matrix
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uniform mat4 occModelWorldMatrix; //!< Model-world matrix
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//! World-view matrix.
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uniform mat4 occWorldViewMatrix;
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uniform mat4 occWorldViewMatrixInverse; //!< Inverse of the world-view matrix
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uniform mat4 occProjectionMatrixInverse; //!< Inverse of the projection matrix
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uniform mat4 occModelWorldMatrixInverse; //!< Inverse of the model-world matrix
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//! Projection matrix.
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uniform mat4 occProjectionMatrix;
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uniform mat4 occWorldViewMatrixTranspose; //!< Transpose of the world-view matrix
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uniform mat4 occProjectionMatrixTranspose; //!< Transpose of the projection matrix
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uniform mat4 occModelWorldMatrixTranspose; //!< Transpose of the model-world matrix
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//! Model-world matrix.
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uniform mat4 occModelWorldMatrix;
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uniform mat4 occWorldViewMatrixInverseTranspose; //!< Transpose of the inverse of the world-view matrix
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uniform mat4 occProjectionMatrixInverseTranspose; //!< Transpose of the inverse of the projection matrix
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uniform mat4 occModelWorldMatrixInverseTranspose; //!< Transpose of the inverse of the model-world matrix
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//-------------------------------------------------------
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// light type enumeration
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const int OccLightType_Direct = 1; //!< directional light source
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const int OccLightType_Point = 2; //!< isotropic point light source
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const int OccLightType_Spot = 3; //!< spot light source
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//! Inverse of the world-view matrix.
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uniform mat4 occWorldViewMatrixInverse;
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// Light sources
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uniform vec4 occLightAmbient; //!< Cumulative ambient color
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uniform int occLightSourcesCount; //!< Total number of light sources
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int occLight_Type (in int theId); //!< Type of light source
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int occLight_IsHeadlight (in int theId); //!< Is light a headlight?
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vec4 occLight_Diffuse (in int theId); //!< Diffuse intensity for specified light source
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vec4 occLight_Specular (in int theId); //!< Specular intensity (currently - equals to diffuse intencity)
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vec4 occLight_Position (in int theId); //!< Position of specified light source
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vec4 occLight_SpotDirection (in int theId); //!< Direction of specified spot light source
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float occLight_ConstAttenuation (in int theId); //!< Const attenuation factor of positional light source
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float occLight_LinearAttenuation (in int theId); //!< Linear attenuation factor of positional light source
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float occLight_SpotCutOff (in int theId); //!< Maximum spread angle of the spot light (in radians)
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float occLight_SpotExponent (in int theId); //!< Attenuation of the spot light intensity (from 0 to 1)
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//! Inverse of the projection matrix.
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uniform mat4 occProjectionMatrixInverse;
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// Front material properties accessors
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vec4 occFrontMaterial_Emission(void); //!< Emission color
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vec4 occFrontMaterial_Ambient(void); //!< Ambient reflection
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vec4 occFrontMaterial_Diffuse(void); //!< Diffuse reflection
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vec4 occFrontMaterial_Specular(void); //!< Specular reflection
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float occFrontMaterial_Shininess(void); //!< Specular exponent
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float occFrontMaterial_Transparency(void); //!< Transparency coefficient
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//! Inverse of the model-world matrix.
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uniform mat4 occModelWorldMatrixInverse;
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// Front material properties accessors
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vec4 occBackMaterial_Emission(void); //!< Emission color
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vec4 occBackMaterial_Ambient(void); //!< Ambient reflection
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vec4 occBackMaterial_Diffuse(void); //!< Diffuse reflection
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vec4 occBackMaterial_Specular(void); //!< Specular reflection
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float occBackMaterial_Shininess(void); //!< Specular exponent
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float occBackMaterial_Transparency(void); //!< Transparency coefficient
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//-------------------------------------------------------
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uniform int occDistinguishingMode; //!< Are front and back faces distinguished?
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uniform int occTextureEnable; //!< Is texture enabled?
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uniform sampler2D occActiveSampler; //!< Current active sampler
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//! Transpose of the world-view matrix.
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uniform mat4 occWorldViewMatrixTranspose;
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// clipping planes state
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const int OccEquationCoords_View = 0; //!< view-space clipping plane
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const int OccEquationCoords_World = 1; //!< world-space clipping plane
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//! Transpose of the projection matrix.
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uniform mat4 occProjectionMatrixTranspose;
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//! Transpose of the model-world matrix.
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uniform mat4 occModelWorldMatrixTranspose;
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//-------------------------------------------------------
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//! Transpose of the inverse of the world-view matrix.
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uniform mat4 occWorldViewMatrixInverseTranspose;
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//! Transpose of the inverse of the projection matrix.
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uniform mat4 occProjectionMatrixInverseTranspose;
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//! Transpose of the inverse of the model-world matrix.
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uniform mat4 occModelWorldMatrixInverseTranspose;
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/////////////////////////////////////////////////////////////////////
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// OCCT light source state
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//! Array of OCCT light sources.
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uniform occLightSource occLightSources[_OCC_MAX_LIGHTS_];
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//! Total number of OCCT light sources.
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uniform int occLightSourcesCount;
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/////////////////////////////////////////////////////////////////////
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// OCCT material state
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//! Parameters of OCCT back material.
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uniform occMaterialParams occBackMaterial;
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//! Parameters of OCCT front material.
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uniform occMaterialParams occFrontMaterial;
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//! Are front and back faces distinguished?
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uniform int occDistinguishingMode;
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//! Is texture enabled?
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uniform int occTextureEnable;
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//! Current active sampler.
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uniform sampler2D occActiveSampler;
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/////////////////////////////////////////////////////////////////////
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// OCCT clipping planes state
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uniform occClipPlane occClipPlanes[_OCC_MAX_CLIP_PLANES_];
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//! Parameters of clipping planes
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uniform vec4 occClipPlaneEquations[THE_MAX_CLIP_PLANES];
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uniform int occClipPlaneSpaces [THE_MAX_CLIP_PLANES];
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37
src/Shaders/DeclarationsImpl.glsl
Normal file
37
src/Shaders/DeclarationsImpl.glsl
Normal file
@@ -0,0 +1,37 @@
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// This file includes implementation of common functions and properties accessors
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// arrays of light sources
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uniform ivec2 occLightSourcesTypes[THE_MAX_LIGHTS]; //!< packed light sources types
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uniform vec4 occLightSources[THE_MAX_LIGHTS * 4]; //!< packed light sources parameters
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// light source properties accessors
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int occLight_Type (in int theId) { return occLightSourcesTypes[theId].x; }
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int occLight_IsHeadlight (in int theId) { return occLightSourcesTypes[theId].y; }
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vec4 occLight_Diffuse (in int theId) { return occLightSources[theId * 4 + 0]; }
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vec4 occLight_Specular (in int theId) { return occLightSources[theId * 4 + 0]; }
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vec4 occLight_Position (in int theId) { return occLightSources[theId * 4 + 1]; }
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vec4 occLight_SpotDirection (in int theId) { return occLightSources[theId * 4 + 2]; }
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float occLight_ConstAttenuation (in int theId) { return occLightSources[theId * 4 + 3].x; }
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float occLight_LinearAttenuation (in int theId) { return occLightSources[theId * 4 + 3].y; }
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float occLight_SpotCutOff (in int theId) { return occLightSources[theId * 4 + 3].z; }
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float occLight_SpotExponent (in int theId) { return occLightSources[theId * 4 + 3].w; }
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// material state
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uniform vec4 occFrontMaterial[5];
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uniform vec4 occBackMaterial[5];
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// front material properties accessors
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vec4 occFrontMaterial_Emission(void) { return occFrontMaterial[0]; }
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vec4 occFrontMaterial_Ambient(void) { return occFrontMaterial[1]; }
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vec4 occFrontMaterial_Diffuse(void) { return occFrontMaterial[2]; }
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vec4 occFrontMaterial_Specular(void) { return occFrontMaterial[3]; }
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float occFrontMaterial_Shininess(void) { return occFrontMaterial[4].x; }
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float occFrontMaterial_Transparency(void) { return occFrontMaterial[4].y; }
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// back material properties accessors
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vec4 occBackMaterial_Emission(void) { return occBackMaterial[0]; }
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vec4 occBackMaterial_Ambient(void) { return occBackMaterial[1]; }
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vec4 occBackMaterial_Diffuse(void) { return occBackMaterial[2]; }
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vec4 occBackMaterial_Specular(void) { return occBackMaterial[3]; }
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float occBackMaterial_Shininess(void) { return occBackMaterial[4].x; }
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float occBackMaterial_Transparency(void) { return occBackMaterial[4].y; }
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@@ -17,46 +17,22 @@
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// purpose or non-infringement. Please see the License for the specific terms
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// and conditions governing the rights and limitations under the License.
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//! Direction to the viewer.
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varying vec3 View;
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varying vec3 View; //!< Direction to the viewer
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varying vec3 Normal; //!< Vertex normal in view space
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varying vec4 Position; //!< Vertex position in view space.
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//! Vertex normal in view space.
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varying vec3 Normal;
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vec3 Ambient; //!< Ambient contribution of light sources
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vec3 Diffuse; //!< Diffuse contribution of light sources
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vec3 Specular; //!< Specular contribution of light sources
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//! Vertex position in view space.
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varying vec4 Position;
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//! Ambient contribution of light sources.
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vec3 Ambient;
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//! Diffuse contribution of light sources.
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vec3 Diffuse;
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//! Specular contribution of light sources.
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vec3 Specular;
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// =======================================================================
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// function : AmbientLight
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// purpose : Computes contribution of OCCT pure ambient light source
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// =======================================================================
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void AmbientLight (in int theIndex)
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{
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Ambient += occLightSources[theIndex].Ambient;
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}
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// =======================================================================
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// function : PointLight
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// purpose : Computes contribution of OCCT isotropic point light source
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// =======================================================================
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void PointLight (in int theIndex,
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//! Computes contribution of isotropic point light source
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void pointLight (in int theId,
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in vec3 theNormal,
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in vec3 theView,
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in vec3 thePoint)
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{
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vec3 aLight = occLightSources[theIndex].Position;
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if (occLightSources[theIndex].Head == 0)
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vec3 aLight = occLight_Position (theId).xyz;
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if (occLight_IsHeadlight (theId) == 0)
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{
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aLight = vec3 (occWorldViewMatrix * occModelWorldMatrix * vec4 (aLight, 1.0));
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}
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@@ -64,107 +40,86 @@ void PointLight (in int theIndex,
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float aDist = length (aLight);
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aLight = aLight * (1.0 / aDist);
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float anAttenuation = 1.0 / (occLightSources[theIndex].ConstAttenuation +
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occLightSources[theIndex].LinearAttenuation * aDist);
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float anAtten = 1.0 / (occLight_ConstAttenuation (theId)
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+ occLight_LinearAttenuation (theId) * aDist);
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vec3 aHalf = normalize (aLight + theView);
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float aNdotL = max (0.0, dot (theNormal, aLight));
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float aNdotH = max (0.0, dot (theNormal, aHalf));
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float aNdotH = max (0.0, dot (theNormal, aHalf ));
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float aSpecl = 0.0;
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if (aNdotL > 0.0)
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{
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aSpecl = pow (aNdotH, occFrontMaterial.Shininess);
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aSpecl = pow (aNdotH, occFrontMaterial_Shininess());
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}
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Ambient += occLightSources[theIndex].Ambient * anAttenuation;
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Diffuse += occLightSources[theIndex].Diffuse * aNdotL * anAttenuation;
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Specular += occLightSources[theIndex].Specular * aSpecl * anAttenuation;
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Diffuse += occLight_Diffuse (theId).rgb * aNdotL * anAtten;
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Specular += occLight_Specular (theId).rgb * aSpecl * anAtten;
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}
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// =======================================================================
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// function : DirectionalLight
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// purpose : Computes contribution of OCCT directional light source
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// =======================================================================
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void DirectionalLight (in int theIndex,
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//! Computes contribution of directional light source
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void directionalLight (in int theId,
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in vec3 theNormal,
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in vec3 theView)
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{
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vec3 aLight = normalize (occLightSources[theIndex].Position);
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if (occLightSources[theIndex].Head == 0)
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vec3 aLight = normalize (occLight_Position (theId).xyz);
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if (occLight_IsHeadlight (theId) == 0)
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{
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aLight = vec3 (occWorldViewMatrix * occModelWorldMatrix * vec4 (aLight, 0.0));
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}
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vec3 aHalf = normalize (aLight + theView);
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float aNdotL = max (0.0, dot (theNormal, aLight));
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float aNdotH = max (0.0, dot (theNormal, aHalf));
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float aNdotH = max (0.0, dot (theNormal, aHalf ));
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float aSpecl = 0.0;
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if (aNdotL > 0.0)
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{
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aSpecl = pow (aNdotH, occFrontMaterial.Shininess);
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aSpecl = pow (aNdotH, occFrontMaterial_Shininess());
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}
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Ambient += occLightSources[theIndex].Ambient;
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Diffuse += occLightSources[theIndex].Diffuse * aNdotL;
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Specular += occLightSources[theIndex].Specular * aSpecl;
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Diffuse += occLight_Diffuse (theId).rgb * aNdotL;
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Specular += occLight_Specular (theId).rgb * aSpecl;
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}
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// =======================================================================
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// function : ComputeLighting
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// purpose : Computes illumination from OCCT light sources
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// =======================================================================
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vec4 ComputeLighting (in vec3 theNormal,
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//! Computes illumination from light sources
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vec4 computeLighting (in vec3 theNormal,
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in vec3 theView,
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in vec4 thePoint)
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{
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// Clear the light intensity accumulators
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Ambient = vec3 (0.0);
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Ambient = occLightAmbient.rgb;
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Diffuse = vec3 (0.0);
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Specular = vec3 (0.0);
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vec3 aPoint = thePoint.xyz / thePoint.w;
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for (int anIndex = 0; anIndex < occLightSourcesCount; ++anIndex)
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{
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occLightSource light = occLightSources[anIndex];
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if (light.Type == occAmbientLight)
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int aType = occLight_Type (anIndex);
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if (aType == OccLightType_Direct)
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{
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AmbientLight (anIndex);
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directionalLight (anIndex, theNormal, theView);
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}
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else if (aType == OccLightType_Point)
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{
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pointLight (anIndex, theNormal, theView, aPoint);
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}
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else if (aType == OccLightType_Spot)
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{
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// Not implemented
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}
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else if (light.Type == occDirectLight)
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{
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DirectionalLight (anIndex, theNormal, theView);
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}
|
||||
else if (light.Type == occPointLight)
|
||||
{
|
||||
PointLight (anIndex, theNormal, theView, aPoint);
|
||||
}
|
||||
else if (light.Type == occSpotLight)
|
||||
{
|
||||
/* Not implemented */
|
||||
}
|
||||
}
|
||||
|
||||
return vec4 (Ambient, 1.0) * occFrontMaterial.Ambient +
|
||||
vec4 (Diffuse, 1.0) * occFrontMaterial.Diffuse +
|
||||
vec4 (Specular, 1.0) * occFrontMaterial.Specular;
|
||||
|
||||
return vec4 (Ambient, 1.0) * occFrontMaterial_Ambient()
|
||||
+ vec4 (Diffuse, 1.0) * occFrontMaterial_Diffuse()
|
||||
+ vec4 (Specular, 1.0) * occFrontMaterial_Specular();
|
||||
}
|
||||
|
||||
// =======================================================================
|
||||
// function : main
|
||||
// purpose : Entry point to the fragment shader
|
||||
// =======================================================================
|
||||
//! Entry point to the Fragment Shader
|
||||
void main()
|
||||
{
|
||||
gl_FragColor = ComputeLighting (normalize (Normal),
|
||||
gl_FragColor = computeLighting (normalize (Normal),
|
||||
normalize (View),
|
||||
Position);
|
||||
}
|
||||
|
||||
@@ -17,42 +17,27 @@
|
||||
// purpose or non-infringement. Please see the License for the specific terms
|
||||
// and conditions governing the rights and limitations under the License.
|
||||
|
||||
//! Direction to the viewer.
|
||||
varying vec3 View;
|
||||
varying vec3 View; //!< Direction to the viewer
|
||||
varying vec3 Normal; //!< Vertex normal in view space
|
||||
varying vec4 Position; //!< Vertex position in view space
|
||||
|
||||
//! Vertex normal in view space.
|
||||
varying vec3 Normal;
|
||||
|
||||
//! Vertex position in view space.
|
||||
varying vec4 Position;
|
||||
|
||||
// =======================================================================
|
||||
// function : TransformNormal
|
||||
// purpose : Computes the normal in view space
|
||||
// =======================================================================
|
||||
//! Computes the normal in view space
|
||||
vec3 TransformNormal (in vec3 theNormal)
|
||||
{
|
||||
vec4 aResult = occWorldViewMatrixInverseTranspose *
|
||||
occModelWorldMatrixInverseTranspose * vec4 (theNormal, 0.0);
|
||||
|
||||
vec4 aResult = occWorldViewMatrixInverseTranspose
|
||||
* occModelWorldMatrixInverseTranspose
|
||||
* vec4 (theNormal, 0.0);
|
||||
return normalize (aResult.xyz);
|
||||
}
|
||||
|
||||
// =======================================================================
|
||||
// function : main
|
||||
// purpose : Entry point to the vertex shader
|
||||
// =======================================================================
|
||||
//! Entry point to the Vertex Shader
|
||||
void main()
|
||||
{
|
||||
// Compute vertex position in the view space
|
||||
Position = occWorldViewMatrix * occModelWorldMatrix * occVertex;
|
||||
|
||||
// Compute vertex normal in the view space
|
||||
Normal = TransformNormal (occNormal);
|
||||
|
||||
// Note: The specified view vector is absolutely correct only for the orthogonal
|
||||
// projection. For perspective projection it will be approximate, but it is in
|
||||
// good agreement with the OpenGL calculations
|
||||
Position = occWorldViewMatrix * occModelWorldMatrix * occVertex; // position in the view space
|
||||
Normal = TransformNormal (occNormal); // normal in the view space
|
||||
|
||||
// Note: The specified view vector is absolutely correct only for the orthogonal projection.
|
||||
// For perspective projection it will be approximate, but it is in good agreement with the OpenGL calculations.
|
||||
View = vec3 (0.0, 0.0, 1.0);
|
||||
|
||||
// Do fixed functionality vertex transform
|
||||
|
||||
Reference in New Issue
Block a user