1531446fb2
These two patches allow use of external shaders as the tree and 3d cloud
shaders. The shaders are Shaders/3dcloud.{frag|vert} and
Shaders/tree.{frag|vert}. If the shader files are not found, the
original shaders included in the source are used.
This makes testing modifications to the shaders easier and faster. End
users should see no difference when using this.
31 lines
1.2 KiB
GLSL
31 lines
1.2 KiB
GLSL
varying float fogFactor;
|
|
|
|
void main(void)
|
|
{
|
|
float numVarieties = gl_Normal.z;
|
|
float texFract = floor(fract(gl_MultiTexCoord0.x) * numVarieties) / numVarieties;
|
|
texFract += floor(gl_MultiTexCoord0.x) / numVarieties;
|
|
float sr = sin(gl_FogCoord);
|
|
float cr = cos(gl_FogCoord);
|
|
gl_TexCoord[0] = vec4(texFract, gl_MultiTexCoord0.y, 0.0, 0.0);
|
|
|
|
// scaling
|
|
vec3 position = gl_Vertex.xyz * gl_Normal.xxy;
|
|
|
|
// Rotation of the generic quad to specific one for the tree.
|
|
position.xy = vec2(dot(position.xy, vec2(cr, sr)), dot(position.xy, vec2(-sr, cr)));
|
|
position = position + gl_Color.xyz;
|
|
gl_Position = gl_ModelViewProjectionMatrix * vec4(position,1.0);
|
|
vec3 ecPosition = vec3(gl_ModelViewMatrix * vec4(position, 1.0));
|
|
|
|
float n = dot(normalize(gl_LightSource[0].position.xyz), normalize(-ecPosition));
|
|
|
|
vec3 diffuse = gl_FrontMaterial.diffuse.rgb * max(0.1, n);
|
|
vec4 ambientColor = gl_FrontLightModelProduct.sceneColor + gl_LightSource[0].ambient * gl_FrontMaterial.ambient;
|
|
gl_FrontColor = ambientColor + gl_LightSource[0].diffuse * vec4(diffuse, 1.0);
|
|
gl_BackColor = gl_FrontColor;
|
|
|
|
float fogCoord = abs(ecPosition.z);
|
|
fogFactor = exp( -gl_Fog.density * gl_Fog.density * fogCoord * fogCoord);
|
|
fogFactor = clamp(fogFactor, 0.0, 1.0);
|
|
}
|