35aa87674d
git-svn-id: svn+ssh://svn.code.sf.net/p/supertuxkart/code/main/trunk@10070 178a84e3-b1eb-0310-8ba1-8eac791a3b58
25 lines
1.1 KiB
GLSL
25 lines
1.1 KiB
GLSL
// By http://content.gpwiki.org/index.php/OpenGL:Tutorials:GLSL_Bump_Mapping
|
||
// Released under GNU FDL license, without invariant (so DFSG-compliant, see
|
||
// http://wiki.debian.org/DFSGLicenses#Exception)
|
||
|
||
varying vec4 passcolor; //The vertex color passed
|
||
varying vec3 LightDir; //The transformed light direction, to pass to the fragment shader
|
||
attribute vec3 tangent; //The inverse tangent to the geometry
|
||
attribute vec3 binormal; //The inverse binormal to the geometry
|
||
uniform vec3 lightdir; //The direction the light is shining
|
||
void main()
|
||
{
|
||
//Put the color in a varying variable
|
||
passcolor = gl_Color;
|
||
//Put the vertex in the position passed
|
||
gl_Position = ftransform();
|
||
//Construct a 3x3 matrix from the geometry’s inverse tangent, binormal, and normal
|
||
mat3 rotmat = mat3(tangent,binormal,gl_Normal);
|
||
//Rotate the light into tangent space
|
||
LightDir = rotmat * normalize(lightdir);
|
||
//Normalize the light
|
||
normalize(LightDir);
|
||
//Use the first set of texture coordinates in the fragment shader
|
||
gl_TexCoord[0] = gl_MultiTexCoord0;
|
||
}
|