95 lines
2.9 KiB
GLSL
95 lines
2.9 KiB
GLSL
#version 130
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//#extension GL_EXT_gpu_shader4 : enable
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uniform vec3 ambient;
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uniform sampler2D t0, t1, t2, tb;
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uniform int gid, lightsCount;
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uniform bool firstPass;
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uniform vec2 dt;
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uniform vec4 back_color;
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//uniform vec3 eye;
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//uniform vec4 lpos[8];
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uniform mat4 mat;
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//uniform float zNear, zFar;
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float light_diffuse(int model, vec3 l, vec3 n, vec3 h, vec3 v, float shininess) {return max(0., dot(l, n));}
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float light_specular(int model, vec3 l, vec3 n, vec3 h, vec3 v, float shininess) {return max(0., pow(dot(n, h), shininess));}
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vec4 pos, lpos;
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vec3 li, si, ldir, halfV;
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float sh, dist, NdotL, spot, ldist;
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void calcLight(in int index, in vec3 n, in vec3 v, in vec4 v2) {
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lpos = gl_LightSource[index].position;
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ldir = lpos.xyz - (pos.xyz * lpos.w);
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ldist = length(ldir);
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ldir = normalize(ldir);
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NdotL = max(dot(n, ldir), 0.);
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spot = step(0., NdotL);
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if (NdotL > 0.) {
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if (gl_LightSource[index].spotCutoff < 180.) {
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spot = max(dot(-ldir, gl_LightSource[index].spotDirection.xyz), 0.);
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spot *= step(gl_LightSource[index].spotCosCutoff, spot);
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spot = pow(spot, (gl_LightSource[index].spotExponent + 0.001));
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}
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halfV = normalize(ldir + v);
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//i += gl_LightSource[i].diffuse.rgb * NdotL;
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//si += gl_LightSource[i].specular.rgb * pow(max(dot(n, halfV), 0.), sh);
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spot /= (gl_LightSource[index].constantAttenuation + ldist * (gl_LightSource[index].linearAttenuation + ldist * gl_LightSource[index].quadraticAttenuation));
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li += spot * gl_LightSource[index].diffuse.rgb * light_diffuse(0, ldir, n, halfV, v, sh);
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si += spot * gl_LightSource[index].specular.rgb * v2.rgb * light_specular(0, ldir, n, halfV, v, sh);
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}
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//li = vec3(gl_LightSource[index].spotExponent);
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//si = vec3(0);
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}
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void main(void) {
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//if (d == 1.) discard;
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vec4 v0 = texture2D(t0, gl_TexCoord[0].xy);
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if (v0.w == 0.) {
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gl_FragColor = back_color;
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return;
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}
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vec4 v1 = texture2D(t1, gl_TexCoord[0].xy), v2 = texture2D(t2, gl_TexCoord[0].xy);//, v3 = texture2D(t3, gl_TexCoord[0].xy);
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vec2 sp = gl_FragCoord.xy * dt * 2 - vec2(1, 1);
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vec3 dc = v0.rgb, n = v1.xyz * 2. - vec3(1.);
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float height = v2.w;
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li = gl_LightModel.ambient.rgb;
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si = vec3(0.);
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pos = vec4(sp, 0, 1.) * mat;
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pos *= v0.w;
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pos.rgb += n * height;
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vec3 v = normalize(-pos.xyz);
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sh = v1.w;
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//int light_model = int(v3.r * 255. + 0.5);
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//li = ambient;
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if (lightsCount > 0) {
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calcLight(0, n, v, v2);
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if (lightsCount > 1) {
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calcLight(1, n, v, v2);
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if (lightsCount > 2) {
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calcLight(2, n, v, v2);
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if (lightsCount > 3) {
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calcLight(3, n, v, v2);
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if (lightsCount > 4) {
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calcLight(4, n, v, v2);
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if (lightsCount > 5) {
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calcLight(5, n, v, v2);
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if (lightsCount > 6) {
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calcLight(6, n, v, v2);
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if (lightsCount > 7) {
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calcLight(7, n, v, v2);
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}
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}
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}
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}
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}
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}
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}
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}
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gl_FragColor.rgb = li * dc + si + texture2D(tb, gl_TexCoord[0].xy).rgb;
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//gl_FragColor.rgb = v0.rgb;
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}
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