1 // Created on: 2013-10-10
2 // Created by: Denis BOGOLEPOV
3 // Copyright (c) 2013-2014 OPEN CASCADE SAS
5 // This file is part of Open CASCADE Technology software library.
7 // This library is free software; you can redistribute it and/or modify it under
8 // the terms of the GNU Lesser General Public License version 2.1 as published
9 // by the Free Software Foundation, with special exception defined in the file
10 // OCCT_LGPL_EXCEPTION.txt. Consult the file LICENSE_LGPL_21.txt included in OCCT
11 // distribution for complete text of the license and disclaimer of any warranty.
13 // Alternatively, this file may be used under the terms of Open CASCADE
14 // commercial license or contractual agreement.
16 // This files includes definition of common uniform variables in OCCT GLSL programs
18 #define THE_MAX_LIGHTS 8
19 #define THE_MAX_CLIP_PLANES 8
23 attribute vec4 occVertex;
24 attribute vec3 occNormal;
25 attribute vec4 occTexCoord;
26 attribute vec4 occVertColor;
30 uniform mat4 occWorldViewMatrix; //!< World-view matrix
31 uniform mat4 occProjectionMatrix; //!< Projection matrix
32 uniform mat4 occModelWorldMatrix; //!< Model-world matrix
34 uniform mat4 occWorldViewMatrixInverse; //!< Inverse of the world-view matrix
35 uniform mat4 occProjectionMatrixInverse; //!< Inverse of the projection matrix
36 uniform mat4 occModelWorldMatrixInverse; //!< Inverse of the model-world matrix
38 uniform mat4 occWorldViewMatrixTranspose; //!< Transpose of the world-view matrix
39 uniform mat4 occProjectionMatrixTranspose; //!< Transpose of the projection matrix
40 uniform mat4 occModelWorldMatrixTranspose; //!< Transpose of the model-world matrix
42 uniform mat4 occWorldViewMatrixInverseTranspose; //!< Transpose of the inverse of the world-view matrix
43 uniform mat4 occProjectionMatrixInverseTranspose; //!< Transpose of the inverse of the projection matrix
44 uniform mat4 occModelWorldMatrixInverseTranspose; //!< Transpose of the inverse of the model-world matrix
46 // light type enumeration
47 const int OccLightType_Direct = 1; //!< directional light source
48 const int OccLightType_Point = 2; //!< isotropic point light source
49 const int OccLightType_Spot = 3; //!< spot light source
52 uniform vec4 occLightAmbient; //!< Cumulative ambient color
53 uniform int occLightSourcesCount; //!< Total number of light sources
54 int occLight_Type (in int theId); //!< Type of light source
55 int occLight_IsHeadlight (in int theId); //!< Is light a headlight?
56 vec4 occLight_Diffuse (in int theId); //!< Diffuse intensity for specified light source
57 vec4 occLight_Specular (in int theId); //!< Specular intensity (currently - equals to diffuse intencity)
58 vec4 occLight_Position (in int theId); //!< Position of specified light source
59 vec4 occLight_SpotDirection (in int theId); //!< Direction of specified spot light source
60 float occLight_ConstAttenuation (in int theId); //!< Const attenuation factor of positional light source
61 float occLight_LinearAttenuation (in int theId); //!< Linear attenuation factor of positional light source
62 float occLight_SpotCutOff (in int theId); //!< Maximum spread angle of the spot light (in radians)
63 float occLight_SpotExponent (in int theId); //!< Attenuation of the spot light intensity (from 0 to 1)
65 // Front material properties accessors
66 vec4 occFrontMaterial_Emission(void); //!< Emission color
67 vec4 occFrontMaterial_Ambient(void); //!< Ambient reflection
68 vec4 occFrontMaterial_Diffuse(void); //!< Diffuse reflection
69 vec4 occFrontMaterial_Specular(void); //!< Specular reflection
70 float occFrontMaterial_Shininess(void); //!< Specular exponent
71 float occFrontMaterial_Transparency(void); //!< Transparency coefficient
73 // Back material properties accessors
74 vec4 occBackMaterial_Emission(void); //!< Emission color
75 vec4 occBackMaterial_Ambient(void); //!< Ambient reflection
76 vec4 occBackMaterial_Diffuse(void); //!< Diffuse reflection
77 vec4 occBackMaterial_Specular(void); //!< Specular reflection
78 float occBackMaterial_Shininess(void); //!< Specular exponent
79 float occBackMaterial_Transparency(void); //!< Transparency coefficient
81 uniform vec4 occColor; //!< color value (in case of disabled lighting)
82 uniform int occDistinguishingMode; //!< Are front and back faces distinguished?
83 uniform int occTextureEnable; //!< Is texture enabled?
84 uniform sampler2D occActiveSampler; //!< Current active sampler
85 uniform float occPointSize; //!< point size
87 // clipping planes state
88 const int OccEquationCoords_View = 0; //!< view-space clipping plane
89 const int OccEquationCoords_World = 1; //!< world-space clipping plane
91 //! Parameters of clipping planes
92 uniform vec4 occClipPlaneEquations[THE_MAX_CLIP_PLANES];
93 uniform int occClipPlaneSpaces [THE_MAX_CLIP_PLANES];
94 uniform int occClipPlaneCount; //!< Total number of clip planes