97 lines
3.3 KiB
GLSL
97 lines
3.3 KiB
GLSL
#version 150
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//#extension GL_EXT_gpu_shader4 : enable
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in vec4 view_dir, view_pos;
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uniform vec3 ambient;
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uniform sampler2D t0, t1, t2, t3, t_pp;
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uniform sampler2D td;
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uniform int gid, lightsCount;
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uniform float z_near, z_far;
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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 mat4 mat_proji;
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float light_diffuse(int model, vec3 l, vec3 n) {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_pow, sh_mul, dist, NdotL, NdotH, spot, ldist, diff;
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void calcLight(in int index, in vec3 n, in vec3 v, in vec4 v2) {
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lpos = qgl_Light[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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halfV = normalize(ldir + v);
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NdotL = max(dot(n, ldir), 0.);
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NdotH = max(dot(n, halfV), 0.);
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spot = step(0., NdotL) * qgl_Light[index].intensity;
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if (NdotL > 0.) {
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if (qgl_Light[index].endAngle <= 90.) {
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float scos = max(dot(-ldir, qgl_Light[index].direction.xyz), 0.);
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spot *= scos * step(qgl_Light[index].endAngleCos, scos);
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//spot = clamp(scos / (-qgl_Light[index].endAngleCos + qgl_Light[index].startAngleCos + 0.0001),0,1);
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spot *= smoothstep(qgl_Light[index].endAngleCos, qgl_Light[index].startAngleCos, scos);
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//spot = pow(spot, (qgl_Light[index].spotExponent + 0.001));
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}
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spot /= (qgl_Light[index].constantAttenuation + ldist * (qgl_Light[index].linearAttenuation + ldist * qgl_Light[index].quadraticAttenuation));
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///li += spot * gl_LightSource[index].diffuse.rgb * light_diffuse(0, ldir, n);
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//si += spot * qgl_Light[index].color.rgb * sh_mul * light_specular(0, ldir, n, halfV, v, sh_pow);
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float NdotLs = NdotL*NdotL;
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float NdotHs = NdotH*NdotH;
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float ndlc = (1. - NdotLs) / NdotLs;
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float der = NdotLs * (sh_mul + ndlc);
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diff = 2. / (1. + sqrt(1. + (1. - sh_mul) * ndlc));
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li += spot * qgl_Light[index].color.rgb * diff;// * light_diffuse(0, ldir, n);
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ndlc = (1. - NdotHs) / NdotHs;
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der = NdotHs * (sh_mul + ndlc);
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si += spot * qgl_Light[index].color.rgb * (sh_mul / (der*der) / 3.1416);
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//si += der;//dot(n, halfV);
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}
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}
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void main(void) {
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//if (d == 1.) discard;
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vec2 tc = qgl_FragTexture.xy;
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vec4 v0 = texture2D(t0, tc);
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if (v0.w == 0.) {
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qgl_FragData[0] = back_color;
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return;
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}
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vec4 v1 = texture2D(t1, tc), v2 = texture2D(t2, tc), v3 = texture2D(t3, tc);
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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 = qgl_AmbientLight.color.rgb * qgl_AmbientLight.intensity;
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//li = vec3(0.);
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si = vec3(0.);
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float posz = z_near * z_far / (texture2D(td, tc).r * (z_far - z_near) - z_far);
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pos = vec4(sp, 0., 1) * mat_proji;
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pos.xy *= v3.w;
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pos.z = posz;
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pos.xyz += n * height;
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//pos.xyz = v3.xyz;
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//pos = v3;
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//pos = vec4(sp, 0, 1.) * mat_proji;
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//pos *= v0.w;
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//pos.z += 1;
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//pos.xy *= 10.;
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//pos.z = v0.w;
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vec3 v = normalize(-pos.xyz);
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sh_pow = 1. / max((1. - v1.w), 0.0001);
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sh_mul = max(1. - v1.w, 0.0001);
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for (int i = 0; i < 16; ++i)
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calcLight(i, n, v, v2);
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qgl_FragData[0].rgb = li * dc + si * v2.rgb + v3.rgb + texture(t_pp, tc).rgb;
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//qgl_FragData[0].rgb = vec3(abs(lpos.xyz - pos.xyz)/10);
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//qgl_FragData[0].rgb = si.rgb;
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//qgl_FragData[0].rgb = (v0.rgb)/2;
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//qgl_FragData[0].a = 0.;
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}
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