|
|
OpenGL (1.2 - 2.0) Code Samples - Page 9
 |
 |
 |
 |
|
Simple Vertex
Shaders |
| The following code samples
demonstrate how to write a simple vertex
shader using the various OpenGL extensions
currently available. Of course, writing
shaders using GPU assembly will soon be
replaced by either OpenGL 2.0's implementation
of a high-level shader language or
Cg (C for graphics) from
nVIDIA.
Check out the DirectX9
source code page for the Direct3D equivalent
of these samples.
Relevant Keywords: GL_NV_vertex_program,
GL_EXT_vertex_shader, glGenProgramsNV, glDeleteProgramsNV,
glBindProgramNV, glLoadProgramNV, glProgramParameter4fNV,
glTrackMatrixNV, glBindParameterEXT, glGenVertexShadersEXT,
glBindVertexShaderEXT, glBeginVertexShaderEXT,
glGenSymbolsEXT, glShaderOp2EXT, glShaderOp1EXT,
glEndVertexShaderEXT, glSetInvariantEXT,
glSetLocalConstantEXT, glGetString, wglGetProcAddress,
GL_VERTEX_PROGRAM_NV, GL_VERTEX_SHADER_EXT,
GL_MODELVIEW_PROJECTION_NV, GL_IDENTITY_NV,
GL_MODELVIEW_MATRIX, GL_PROJECTION_MATRIX,
GL_CURRENT_VERTEX_EXT, GL_CURRENT_COLOR,
GL_VECTOR_EXT, GL_LOCAL_CONSTANT_EXT, GL_FULL_RANGE_EXT,
GL_FLOAT, GL_LOCAL_EXT, GL_OP_MULTIPLY_MATRIX_EXT,
GL_OUTPUT_VERTEX_EXT, GL_OP_MOV_EXT, GL_OUTPUT_COLOR0_EXT,
PFNGLGENPROGRAMSNVPROC, PFNGLDELETEPROGRAMSNVPROC,
PFNGLBINDPROGRAMNVPROC, PFNGLLOADPROGRAMNVPROC,
PFNGLPROGRAMPARAMETER4FNVPROC, PFNGLTRACKMATRIXNVPROC,
PFNGLBINDPARAMETEREXTPROC, PFNGLGENVERTEXSHADERSEXTPROC,
PFNGLBINDVERTEXSHADEREXTPROC, PFNGLBEGINVERTEXSHADEREXTPROC,
PFNGLGENSYMBOLSEXTPROC, PFNGLSHADEROP2EXTPROC,
PFNGLSHADEROP1EXTPROC, PFNGLENDVERTEXSHADEREXTPROC,
PFNGLSETINVARIANTEXTPROC, PFNGLSETLOCALCONSTANTEXTPROC,
!!VP1.1, DP4, HPOS, OPOS, MOV, , COL0, and
END. *
(*This list doesn't include the keywords
for the ARB_vertex_program extension since
they've already leen listed below.)
|
|
 |
 |
 |
 |
|
|
|
|
|
|
|
Simple
ARB Vertex & Pixel Shader |
| Demonstrates how to write both
a simple vertex and pixel shader using OpenGL's
new extensions,
ARB_vertex_program, and
ARB_fragment_program. Check out the
DirectX9 source
code page for the Direct3D equivalent of
this sample.
Relevant Keywords: GL_ARB_vertex_program,
GL_ARB_fragment_program, glGenProgramsARB,
glDeleteProgramsARB, glBindProgramARB, glProgramStringARB,
glProgramEnvParameter4fARB, glGetString,
wglGetProcAddress, GL_VERTEX_PROGRAM_ARB,
GL_FRAGMENT_PROGRAM_ARB, GL_PROGRAM_FORMAT_ASCII_ARB,
GL_C4UB_V3F, GL_QUADS, PFNGLGENPROGRAMSARBPROC,
PFNGLDELETEPROGRAMSARBPROC, PFNGLBINDPROGRAMARBPROC,
PFNGLPROGRAMSTRINGARBPROC, PFNGLPROGRAMENVPARAMETER4FARBPROC,
!!ARBvp1.0, !!ARBfp1.0, PARAM, ATTRIB, OUTPUT,
state.matrix.mvp, program.env, vertex.position,
vertex.color, result.position, result.color,
fragment.texcoord, fragment.color.primary,
texture, TEMP, TXP, MUL, ADD, 2D, DP4, MOV,
and END.
|
|
|
|
|
|
|
|
|
