112 lines
4.0 KiB
GLSL
112 lines
4.0 KiB
GLSL
/**
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* @file alphaV.glsl
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*
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* Copyright (c) 2007-$CurrentYear$, Linden Research, Inc.
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* $License$
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*/
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vec4 calcLighting(vec3 pos, vec3 norm, vec4 color, vec4 baseCol);
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void calcAtmospherics(vec3 inPositionEye);
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float calcDirectionalLight(vec3 n, vec3 l);
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vec3 atmosAmbient(vec3 light);
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vec3 atmosAffectDirectionalLight(float lightIntensity);
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vec3 scaleDownLight(vec3 light);
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vec3 scaleUpLight(vec3 light);
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varying vec3 vary_ambient;
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varying vec3 vary_directional;
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varying vec3 vary_fragcoord;
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varying vec3 vary_position;
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varying vec3 vary_light;
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varying vec3 vary_pointlight_col;
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varying float vary_texture_index;
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uniform float near_clip;
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uniform float shadow_offset;
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uniform float shadow_bias;
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float calcPointLightOrSpotLight(vec3 v, vec3 n, vec4 lp, vec3 ln, float la, float fa, float is_pointlight)
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{
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//get light vector
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vec3 lv = lp.xyz-v;
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//get distance
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float d = length(lv);
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float da = 0.0;
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if (d > 0.0 && la > 0.0 && fa > 0.0)
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{
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//normalize light vector
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lv *= 1.0/d;
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//distance attenuation
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float dist2 = d*d/(la*la);
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da = clamp(1.0-(dist2-1.0*(1.0-fa))/fa, 0.0, 1.0);
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// spotlight coefficient.
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float spot = max(dot(-ln, lv), is_pointlight);
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da *= spot*spot; // GL_SPOT_EXPONENT=2
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//angular attenuation
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da *= calcDirectionalLight(n, lv);
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}
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return da;
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}
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void main()
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{
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//transform vertex
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vec4 vert = vec4(gl_Vertex.xyz, 1.0);
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vary_texture_index = gl_Vertex.w;
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gl_Position = gl_ModelViewProjectionMatrix * vert;
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gl_TexCoord[0] = gl_TextureMatrix[0] * gl_MultiTexCoord0;
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vec4 pos = (gl_ModelViewMatrix * vert);
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vec3 norm = normalize(gl_NormalMatrix * gl_Normal);
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float dp_directional_light = max(0.0, dot(norm, gl_LightSource[0].position.xyz));
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vary_position = pos.xyz + gl_LightSource[0].position.xyz * (1.0-dp_directional_light)*shadow_offset;
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calcAtmospherics(pos.xyz);
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//vec4 color = calcLighting(pos.xyz, norm, gl_Color, vec4(0.));
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vec4 col = vec4(0.0, 0.0, 0.0, gl_Color.a);
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// Collect normal lights
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col.rgb += gl_LightSource[2].diffuse.rgb*calcPointLightOrSpotLight(pos.xyz, norm, gl_LightSource[2].position, gl_LightSource[2].spotDirection.xyz, gl_LightSource[2].linearAttenuation, gl_LightSource[2].quadraticAttenuation, gl_LightSource[2].specular.a);
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col.rgb += gl_LightSource[3].diffuse.rgb*calcPointLightOrSpotLight(pos.xyz, norm, gl_LightSource[3].position, gl_LightSource[3].spotDirection.xyz, gl_LightSource[3].linearAttenuation, gl_LightSource[3].quadraticAttenuation ,gl_LightSource[3].specular.a);
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col.rgb += gl_LightSource[4].diffuse.rgb*calcPointLightOrSpotLight(pos.xyz, norm, gl_LightSource[4].position, gl_LightSource[4].spotDirection.xyz, gl_LightSource[4].linearAttenuation, gl_LightSource[4].quadraticAttenuation, gl_LightSource[4].specular.a);
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col.rgb += gl_LightSource[5].diffuse.rgb*calcPointLightOrSpotLight(pos.xyz, norm, gl_LightSource[5].position, gl_LightSource[5].spotDirection.xyz, gl_LightSource[5].linearAttenuation, gl_LightSource[5].quadraticAttenuation, gl_LightSource[5].specular.a);
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col.rgb += gl_LightSource[6].diffuse.rgb*calcPointLightOrSpotLight(pos.xyz, norm, gl_LightSource[6].position, gl_LightSource[6].spotDirection.xyz, gl_LightSource[6].linearAttenuation, gl_LightSource[6].quadraticAttenuation, gl_LightSource[6].specular.a);
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col.rgb += gl_LightSource[7].diffuse.rgb*calcPointLightOrSpotLight(pos.xyz, norm, gl_LightSource[7].position, gl_LightSource[7].spotDirection.xyz, gl_LightSource[7].linearAttenuation, gl_LightSource[7].quadraticAttenuation, gl_LightSource[7].specular.a);
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vary_pointlight_col = col.rgb*gl_Color.rgb;
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col.rgb = vec3(0,0,0);
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// Add windlight lights
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col.rgb = atmosAmbient(vec3(0.));
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vary_light = gl_LightSource[0].position.xyz;
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vary_ambient = col.rgb*gl_Color.rgb;
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vary_directional.rgb = gl_Color.rgb*atmosAffectDirectionalLight(max(calcDirectionalLight(norm, gl_LightSource[0].position.xyz), (1.0-gl_Color.a)*(1.0-gl_Color.a)));
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col.rgb = col.rgb*gl_Color.rgb;
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gl_FrontColor = col;
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gl_FogFragCoord = pos.z;
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pos = gl_ModelViewProjectionMatrix * vert;
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vary_fragcoord.xyz = pos.xyz + vec3(0,0,near_clip);
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}
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