5899a26aad
git-svn-id: svn+ssh://svn.code.sf.net/p/supertuxkart/code/main/trunk@14590 178a84e3-b1eb-0310-8ba1-8eac791a3b58
51 lines
1.1 KiB
GLSL
51 lines
1.1 KiB
GLSL
uniform sampler2D ntex;
|
|
uniform sampler2D dtex;
|
|
|
|
uniform vec3 center;
|
|
uniform vec3 col;
|
|
uniform vec3 campos;
|
|
uniform float r;
|
|
uniform float spec;
|
|
uniform vec2 screen;
|
|
uniform mat4 invprojview;
|
|
|
|
float decdepth(vec4 rgba) {
|
|
return dot(rgba, vec4(1.0, 1.0/255.0, 1.0/65025.0, 1.0/16581375.0));
|
|
}
|
|
|
|
void main() {
|
|
|
|
vec2 texc = gl_FragCoord.xy / screen;
|
|
float z = decdepth(vec4(texture2D(dtex, texc).xyz, 0.0));
|
|
|
|
if (z < 0.03) discard;
|
|
|
|
vec3 tmp = vec3(texc, z);
|
|
tmp = tmp * 2.0 - 1.0;
|
|
|
|
vec4 xpos = vec4(tmp, 1.0);
|
|
xpos = invprojview * xpos;
|
|
xpos.xyz /= xpos.w;
|
|
|
|
float d = distance(center, xpos.xyz);
|
|
if (d > r) discard;
|
|
|
|
float att = 1.0 - smoothstep(0.0, r, d);
|
|
|
|
vec3 norm = texture2D(ntex, texc).xyz;
|
|
norm = (norm - 0.5) * 2.0;
|
|
|
|
vec3 camdir = normalize(campos - xpos.xyz);
|
|
|
|
vec3 L = normalize(center - xpos.xyz);
|
|
vec3 H = normalize(L + camdir);
|
|
|
|
float NdotL = max(0.0, dot(norm, L)) * att;
|
|
if (NdotL < 0.01) discard;
|
|
float NdotH = max(0.0, dot(norm, H));
|
|
NdotH = pow(NdotH, spec);
|
|
NdotH += 0.05; // offset so that the alpha test doesn't kill us
|
|
|
|
gl_FragColor = NdotL * vec4(col, NdotH);
|
|
}
|