59 lines
1.6 KiB
GLSL
59 lines
1.6 KiB
GLSL
|
// Shader based on work by Fabien Sanglard
|
||
|
|
// Released under the terms of CC-BY 3.0
|
||
|
|
|
||
|
|
uniform sampler2D BumpTex1; // Normal map 1
|
||
|
|
uniform sampler2D BumpTex2; // Normal map 2
|
||
|
|
uniform sampler2D DecalTex; //The texture
|
||
|
|
|
||
|
|
uniform vec2 delta1;
|
||
|
|
uniform vec2 delta2;
|
||
|
|
|
||
|
|
varying vec3 lightVec;
|
||
|
|
varying vec3 halfVec;
|
||
|
|
varying vec3 eyeVec;
|
||
|
|
|
||
|
|
void main()
|
||
|
|
{
|
||
|
|
// lookup normal from normal map, move from [0,1] to [-1, 1] range, normalize
|
||
|
|
vec3 normal = 2.0 * texture2D (BumpTex1, gl_TexCoord[0].st + delta1).rgb - 1.0;
|
||
|
|
vec3 normal2 = 2.0 * texture2D (BumpTex2, gl_TexCoord[0].st + delta2).rgb - 1.0;
|
||
|
|
|
||
|
|
// scale normals
|
||
|
|
//normal.y = 4.0*normal.y;
|
||
|
|
//normal2.y = 4.0*normal2.y;
|
||
|
|
|
||
|
|
normal = (normalize(normal) + normalize(normal2))/2.0;
|
||
|
|
|
||
|
|
// compute diffuse lighting
|
||
|
|
float lamberFactor = max (dot (lightVec, normal), 0.0);
|
||
|
|
vec4 diffuseMaterial;
|
||
|
|
vec4 diffuseLight;
|
||
|
|
|
||
|
|
diffuseMaterial = texture2D (DecalTex, gl_TexCoord[0].st + vec2(delta1.x, 0.0));
|
||
|
|
diffuseLight = vec4(1.0, 1.0, 1.0, 1.0);
|
||
|
|
|
||
|
|
//if (lamberFactor < 0.7)
|
||
|
|
//{
|
||
|
|
// lamberFactor = 0.0;
|
||
|
|
//}
|
||
|
|
|
||
|
|
gl_FragColor = diffuseMaterial * (lamberFactor);
|
||
|
|
|
||
|
|
// specular (phong)
|
||
|
|
vec3 R = normalize(reflect(lightVec, normal));
|
||
|
|
float specular = max(dot(R,eyeVec),0.0);
|
||
|
|
|
||
|
|
if (specular > 0.0)
|
||
|
|
{
|
||
|
|
// weak specular
|
||
|
|
specular = specular*specular;
|
||
|
|
float specular03 = specular*0.2;
|
||
|
|
gl_FragColor += vec4(specular03, specular03, specular03, 0.0);
|
||
|
|
|
||
|
|
// strong specular
|
||
|
|
specular = specular*specular*specular;
|
||
|
|
float specular06 = specular*0.5;
|
||
|
|
gl_FragColor += vec4(specular06, specular06, specular06, 0.0);
|
||
|
|
}
|
||
|
|
}
|