// OPENGL SUPPORT
// Enable or disable OpenGL and GLEW libraries.
#define C_USE_OPENGL

//==============================================================================
// CHAI3D - OPENGL:
//==============================================================================

//------------------------------------------------------------------------------
// The following definitions allow CHAI3D to compile without the external OpenGL 
// libraries. This mode of compilation is controlled by the flag C_USE_OPENGL.
// Compiling the framework without OpenGL can be very useful if you plan to 
// use CHAI3D for haptic rendering purposes only, or on real-time operating 
// systems such as QNX or VxWorks for instance where OpenGL is not supported. 
//------------------------------------------------------------------------------

#ifndef C_USE_OPENGL

typedef unsigned int                GLenum;
typedef unsigned int                GLuint;
typedef int                         GLint;
typedef int                         GLsizei;
typedef unsigned char               GLboolean;
typedef signed char                 GLbyte;
typedef short                       GLshort;
typedef unsigned char               GLubyte;
typedef unsigned short              GLushort;
typedef unsigned long               GLulong;
typedef float                       GLfloat;
typedef float                       GLclampf;
typedef double                      GLdouble;
typedef double                      GLclampd;

#define GL_FALSE                    0
#define GL_TRUE                     1
#define GL_EXP                      0x0800
#define GL_EXP2                     0x0801
#define GL_UNSIGNED_BYTE            0x1401
#define GL_LINE                     0x1B01
#define GL_POINTS                   0x0000
#define GL_BYTE                     0x1400
#define GL_SHORT                    0x1402
#define GL_UNSIGNED_SHORT           0x1403
#define GL_UNSIGNED_INT             0x1405
#define GL_DEPTH_COMPONENT          0x1902
#define GL_RGB                      0x1907
#define GL_RGBA                     0x1908
#define GL_LUMINANCE                0x1909
#define GL_LUMINANCE_ALPHA          0x190A
#define GL_TEXTURE0                 0x84C0
#define GL_TEXTURE1                 0x84C1
#define GL_TEXTURE2                 0x84C2
#define GL_TEXTURE3                 0x84C3
#define GL_TEXTURE4                 0x84C4
#define GL_POINT                    0x1B00
#define GL_POINTS                   0x0000
#define GL_LINES                    0x0001
#define GL_LINE_LOOP                0x0002
#define GL_LINE_STRIP               0x0003
#define GL_TRIANGLES                0x0004
#define GL_TRIANGLE_STRIP           0x0005
#define GL_TRIANGLE_FAN             0x0006
#define GL_FILL                     0x1B02

#define GL_MODULATE                 0x2100
#define GL_DECAL                    0x2101
#define GL_LINEAR                   0x2601
#define GL_LINEAR_MIPMAP_LINEAR     0x2703
#define GL_CLAMP                    0x2900
#define GL_REPEAT                   0x2901
#define GL_LIGHT0                   0x4000
#define GL_VERTEX_ARRAY             0x8074
#define GLUquadricObj               void
    
#define GL_CLAMP_TO_EDGE            0x812F
#define GL_NEAREST                  0x2600
#define GL_NEAREST_MIPMAP_NEAREST   0x2700

#endif // C_USE_OPENGL