146 lines
5.3 KiB
GLSL
146 lines
5.3 KiB
GLSL
// vert //
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out vec3 view_dir;
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uniform vec4 view_corners[4];
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void main(void) {
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qgl_FragTexture = qgl_Texture;
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gl_Position = qgl_ftransform();
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view_dir = view_corners[gl_VertexID].xyz;
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}
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// frag //
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in vec3 view_dir;
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uniform vec2 dt;
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uniform float z_near;
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uniform sampler2D tex_coeffs[2];
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uniform sampler2D tex_0, tex_1, tex_2, tex_3, tex_4;
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uniform int lights_start, lights_count;
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uniform vec4 fog_color = vec4(0.5, 0.5, 0.5, 1);
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uniform float fog_decay = 10, fog_density = 0;
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const vec3 luma = vec3(0.299, 0.587, 0.114);
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const float _min_rough = 1.e-8;
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vec4 pos, lpos, shp;
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vec3 li, si, ldir, halfV, bn, bn2, lwdir;
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//vec3 vds, vds2;
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float rough_diff, rough_spec, dist, NdotL, NdotH, spot, ldist, diff, spec, sdist, shadow;
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void calcLight(in int index, in vec3 n, in vec3 v) {
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lpos = qgl_light_position[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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//ldir = vec3(0,0,1);
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halfV = normalize(ldir + v);
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NdotL = max(dot(n, ldir), 1E-8);
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NdotH = max(dot(n, halfV), 1E-8);
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spot = step(1.001E-8, NdotL) * qgl_light_parameter[index].decay_intensity.w;
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#ifdef SPOT
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float scos = max(dot(-ldir, qgl_light_position[index].direction.xyz), 0.);
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spot *= scos * step(qgl_light_parameter[index].angles.w, scos);
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spot *= smoothstep(qgl_light_parameter[index].angles.w, qgl_light_parameter[index].angles.y, scos);
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/*//lwdir = mat3(mat_viewi) * qgl_Light[index].direction.xyz;
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//bn = normalize(cross(lwdir, vec3(1, 0, 0)));
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//bn2 = normalize(cross(lwdir, bn));
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float ds = ldist/200.;//max(abs(sdist) / 5000, 0.02);
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//spot *= clamp(1. - sdist, 0, 1);
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vds = ds * bn.xyz;
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vds2 = ds * bn2.xyz;
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float shadow = getShadow(index, pos.xyz, vec3(0)) * 3.;
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shadow += getShadow(index, pos.xyz, vds ) * 2.;
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shadow += getShadow(index, pos.xyz, - vds ) * 2.;
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shadow += getShadow(index, pos.xyz, - vds2 ) * 2.;
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shadow += getShadow(index, pos.xyz, + vds2 ) * 2.;
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//shadow += getShadow(index, pos.xyz, vds - vds2 ) * 1.5;
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//shadow += getShadow(index, pos.xyz, vds + vds2 ) * 1.5;
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//shadow += getShadow(index, pos.xyz, - vds - vds2 ) * 1.5;
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//shadow += getShadow(index, pos.xyz, - vds + vds2 ) * 1.5;
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//shadow += getShadow(index, pos.xyz, vds + vds );
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//shadow += getShadow(index, pos.xyz, - vds - vds );
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//shadow += getShadow(index, pos.xyz, - vds2 - vds2);
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//shadow += getShadow(index, pos.xyz, + vds2 + vds2);
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//shadow += getShadow(index, pos.xyz, vds + vds - vds2 );
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//shadow += getShadow(index, pos.xyz, - vds - vds - vds2 );
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//shadow += getShadow(index, pos.xyz, vds + vds + vds2 );
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//shadow += getShadow(index, pos.xyz, - vds - vds + vds2 );
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//shadow += getShadow(index, pos.xyz, vds - vds2 - vds2);
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//shadow += getShadow(index, pos.xyz, vds + vds2 + vds2);
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//shadow += getShadow(index, pos.xyz, - vds - vds2 - vds2);
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//shadow += getShadow(index, pos.xyz, - vds + vds2 + vds2);
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//shadow += shadow += getShadow(index, pos.xyz, vds+vds2)*10;
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spot *= mix(1., shadow / 11., shadow_on);*/
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#endif
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vec3 dist_decay = vec3(1, ldist, ldist*ldist);
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spot /= dot(qgl_light_parameter[index].decay_intensity.xyz, dist_decay);
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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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diff = 2. / (1. + sqrt(1. + (1. - rough_diff) * ndlc));
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//diff = texture(tex_coeffs[0], vec2(roughness, (NdotLs))).r;
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li += spot * diff * qgl_light_parameter[index].color.rgb;
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ndlc = (1. - NdotHs) / NdotHs;
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float der = NdotHs * (rough_spec + ndlc);
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spec = rough_spec / (der*der) / 3.1416;
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//spec = texture(tex_coeffs[1], vec2(roughness, (NdotHs))).r;
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si += spot * spec * qgl_light_parameter[index].color.rgb;
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}
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void main(void) {
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ivec2 tc = ivec2(gl_FragCoord.xy);
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vec4 v1 = texelFetch(tex_1, tc, 0);
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float z = v1.w;
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if (z == 1.) {
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discard;
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}
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pos.w = 1;
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pos.xyz = view_dir * z;
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vec3 v = normalize(-pos.xyz);
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vec4 v0 = texelFetch(tex_0, tc, 0),
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v2 = texelFetch(tex_2, tc, 0),
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v3 = texelFetch(tex_3, tc, 0),
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v4 = texelFetch(tex_4, tc, 0);
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vec3 diffuse = v0.rgb;
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vec3 normal = v1.xyz;
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vec3 emission = v3.rgb;
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float alpha = v0.a;
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float metalness = v2.r;
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float roughness = v2.g;
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float reflectivity = v2.b;
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//bn = normalize(vec3(v3.w, v4.zw));
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//bn2 = normalize(cross(n, bn));
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rough_diff = max(roughness, _min_rough);
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rough_spec = max(roughness*roughness*roughness, _min_rough);
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float shlick = clamp(metalness + (1 - metalness) * pow(1 - dot(normal, v), 5), 0, 1);
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li = vec3(0.);//qgl_AmbientLight.color.rgb * qgl_AmbientLight.intensity;
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si = vec3(0.);
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for (int i = 0; i < lights_count; ++i)
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calcLight(lights_start + i, normal, v);
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si *= shlick;
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li *= (1 - shlick);
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alpha = min(1, alpha * (1 + shlick));
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vec3 res_col = max(vec3(0), li * diffuse + si * mix(vec3(1), diffuse, metalness) + emission);
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float plen = length(pos.xyz);
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float fog = 1 - exp(-plen / fog_decay);
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fog = clamp(fog * fog_color.a * fog_density, 0, 1);
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res_col = mix(res_col, fog_color.rgb, fog);
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qgl_FragColor = vec4(res_col, alpha);
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//qgl_FragColor.rgb = vec3(texture(tex_coeffs[0], qgl_FragTexture.xy).r);
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//qgl_FragColor.rgb = vec3(ldir);
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}
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