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NL3D::CVertexProgram Class ReferenceThis class is a vertex program.
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#include <vertex_program.h>
Inheritance diagram for NL3D::CVertexProgram:
List of all members.
Detailed Description
This class is a vertex program.
D3D / OPENGL compatibility notes: ---------------------------------
To make your program compatible with D3D and OPENGL nel drivers, please follow thoses directives to write your vertex programs
- Use only v[0], v[1] etc.. syntax for input registers. Don't use v0, v1 or v[OPOS] etc..
- Use only c[0], c[1] etc.. syntax for constant registers. Don't use c0, c1 etc..
- Use only o[HPOS], o[COL0] etc.. syntax for output registers. Don't use oPos, oD0 etc..
- Use only uppercase for registers R1, R2 etc.. Don't use lowercase r1, r2 etc..
- Use a semicolon to delineate instructions.
- Use ARL instruction to load the adress register and not MOV.
- Don't use the NOP instruction.
- Don't use macros.
-> Thoses programs work without any change under OpenGL. -> Direct3D driver implementation will have to modify the syntax on the fly before the setup like this:
- "v[0]" must be changed in "v0" etc..
- "o[HPOS]" must be changed in oPos etc..
- Semicolon must be changed in line return character.
- ARL instruction must be changed in MOV.
Behaviour of LOG may change depending on implementation: You can only expect to have dest.z = log2(abs(src.w)). LIT may or may not clamp the specular exponent to [-128, 128] (not done when EXT_vertex_shader is used for example ..)
Depending on the implementation, some optimizations can be achieved by masking the unused output values of instructions as LIT, EXPP ..
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Author:
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Cyril 'Hulud' Corvazier , Nevrax France
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Date:
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2001
Definition at line 92 of file vertex_program.h.
Constructor & Destructor Documentation
| NL3D::CVertexProgram::CVertexProgram |
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const char * |
program |
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| NL3D::CVertexProgram::~CVertexProgram |
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[virtual] |
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Member Function Documentation
| const std::string& NL3D::CVertexProgram::getProgram |
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const [inline] |
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Member Data Documentation
std::string NL3D::CVertexProgram::_Program [private]
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The documentation for this class was generated from the following files:
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