HLL Vertex and Pixel Programs
This implementation of vertex program and fragment program from openGL and vertex shaders 1.1 and pixel shaders 1.4 from directX, is developped to interpret and compile in assembly, pseudo code in a particular syntax.
The functionnalities of vertex program in the lib is designed to work on all cards even if graphic card driver doen't support it.(some divers doesn't have the open gl extension, some cards do not implement the ARB spefs even in software).
Here are some explanation on how to develop vertex shaders and pixel shaders and how to decline technique to fit destination graphic cards.
Functions:
sample[.xyzw] ( stage , uv )
coord( TexCoordn )
mul_x2 ( a , b )
mul_x4 ( a , b )
mul_sat ( a , b )
dot ( a , b )
dot_sat ( a , b )
dotbx2 ( a , b ) ou dotofbx2 ( a , b )
reciprocal ( x ) ou rcp ( x )
rsq ( x )
fractionnal ( x ) ou fract ( x ) ou frac ( x )
cmp ( value , a , b ) ou compare ( value , a , b ) -> ( value > 0.0 ) ? a : b
sge ( a , b )
slt ( a , b )
mix ( a , b , x )
lerp ( a , b , x )
lerp_sat ( a , b , x )
smoothstep ( a , b , x )
clamp ( x , min , max )
max ( x , y )
min ( x , y )
normalise ( v ) ou normalize ( v )
norme ( v ) ou norm ( v )
inv ( v )
mod ( x , modulo )
pow ( x , e )
log2 ( x )
exp2 ( x )
log ( x )
exp ( x )
abs ( x )
floor ( x )
round ( x )
trunc ( x )
degrees ( x )
radians ( x )
rsqrt ( x )
sqrt ( x )
atan ( x )
atan2 ( x , y )
tan ( x )
asin ( x )
sin ( x )
acos ( x )
cos ( x )
tgt ( up , v )
reflect ( u , n )
refract ( u , n , eta )
equation ( normal , point )
plane ( v , eq )
interpolate( v1 , v2 , t , M ) ou interpolation( v1 , v2 , t , M )
normal_interpolate( v1 , v2 , t , M ) ou normal_interpolation( v1 , v2 , t , M )
iter( level )
ValueToRGB( x )
RGBToValue( rgb )
Exemples of vertex program that works with lib3d vertex programs
Exemple1: Syntaxe
[VERTEXFORMAT]
XYZ DIFFUSE TEX0-> vertex buffer format
[DEFINES]
MATRIX WORLD; -> link variables, constants
MATRIX VIEWPROJ;
CONST zero=;
CONST one=1.0,1.0,1.0,1.0;
TEXTURE tex;
-> the words following [TECHNIQUE] can be the following :
-> Shaders, Dot3, Multitexture, All Cards due to specification of the technique.
[TECHNIQUE] All cards
[PASS0]
[POSITION] -> pseudo code
u=iPos*4WORLD;
oPos=u*4VIEWPROJ;
[DIFFUSE]
oDiffuse=one;
[MAPPING0]
oTexture0=iTexture0;
[RENDER_STATE] -> similar to directx
Blend False
Texture[0] tex
ColorOp[0] Modulate
ColorArg1[0] Texture
ColorArg2[0] Diffuse
AlphaOp[0] Modulate
AlphaArg1[0] Texture
AlphaArg2[0] Diffuse
ColorOp[1] Disable
AlphaOp[1] Disable
Cull None
ZBuffer True
ZBufferWrite True
TextureCoordinate[0] TexCoo0
[END]
Exemple2: Environment mapping exemple
[VERTEXFORMAT]
XYZ NORMAL TEX0
[DEFINES]
CONST zero;
CONST one=1.0,1.0,1.0,1.0;
CONST half=0.5;
VECTOR alpha;
VECTOR color;
MATRIX WORLD;
MATRIX VIEWPROJ;
TEXTURE tex;
TEXTURE envmap;
[TECHNIQUE] All cards
[PASS0]
[POSITION]
tPos=iPos*4WORLD;
tNorm=iNorm*3WORLD;
oPos=tPos*4VIEWPROJ;
[DIFFUSE]
c=color;
oDiffuse=alpha*c;
oDiffuse.w=one.x;
[MAPPING0]
oTexture1.x=iTexture0.x;
oTexture1.y=iTexture0.y;
[MAPPING1]
oTexture1.x=half.x+half.x*tNorm.x;
oTexture1.y=half.x+half.x*tNorm.y;
[RENDER_STATE]
ShadeMode Smooth
Texture[0] tex
Texture[1] envmap
ColorOp[0] Modulate
ColorArg1[0] Texture
ColorArg2[0] Diffuse
AlphaOp[0] SelectArg2
AlphaArg2[0] Diffuse
ColorOp[1] Modulate
ColorArg1[1] Texture
ColorArg2[1] Current
AlphaOp[1] Disable
Cull Ccw
ZBuffer True
ZBufferWrite True
TextureCoordinate[0] TexCoo0
[END]
Exemple3: Extrude silhouette volume of a degenerated edges vertex buffer
[VERTEXFORMAT]
XYZ NORMAL TEX0
[DEFINES]
MATRIX WORLD;
MATRIX VIEWPROJ;
VECTOR longueur;
VECTOR Light;
VECTOR Decal;
CONST zero=;
CONST one=1.0,1.0,1.0,1.0;
TEXTURE tex;
[TECHNIQUE] All cards
[PASS0]
[POSITION]
tPos=iPos*4WORLD;
tNorm=iNorm*3WORLD;
u=tPos-Light;
s=sge((u|tNorm),zero);
u1=tPos+longueur*s*u*rsq(u|u);
oPos=u1*4VIEWPROJ;
[DIFFUSE]
oDiffuse.x=zero.x;
oDiffuse.y=zero.y;
oDiffuse.z=zero.z;
oDiffuse.w=one.w-s.w;
[MAPPING0]
oTexture0=iTexture0+Decal;
[RENDER_STATE]
ShadeMode Smooth
Blend True
SrcBlendSrcAlpha
DstBlendInvSrcAlpha
Texture[0] tex
ColorOp[0] SelectArg2
ColorArg1[0] Texture
ColorArg2[0] Diffuse
AlphaOp[0] SelectArg2
AlphaArg2[0] Diffuse
ColorOp[1] Disable
AlphaOp[1] Disable
Cull Ccw
ZBuffer True
ZBufferWrite False
TextureCoordinate[0] TexCoo0
[PASS1]
[POSITION]
tPos=iPos*4WORLD;
tNorm=iNorm*3WORLD;
u=tPos-Light;
s=sge((u|tNorm),zero);
u1=tPos+longueur*s*u*rsq(u|u);
oPos=u1*4VIEWPROJ;
[DIFFUSE]
oDiffuse.x=zero.x;
oDiffuse.y=zero.y;
oDiffuse.z=zero.z;
oDiffuse.w=one.w-s.w;
[MAPPING0]
oTexture0=iTexture0+Decal;
[RENDER_STATE]
ShadeMode Smooth
Blend True
SrcBlendSrcAlpha
DstBlendInvSrcAlpha
Texture[0] tex
ColorOp[0] SelectArg2
ColorArg1[0] Texture
ColorArg2[0] Diffuse
AlphaOp[0] SelectArg2
AlphaArg2[0] Diffuse
ColorOp[1] Disable
AlphaOp[1] Disable
Cull Cw
ZBuffer True
ZBufferWrite False
TextureCoordinate[0] TexCoo0
[END]
