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/**
* @file sumLightsV.glsl
*
* Copyright (c) 2005-$CurrentYear$, Linden Research, Inc.
* $License$
*/
float calcDirectionalLight(vec3 n, vec3 l);
float calcPointLight(vec3 v, vec3 n, vec4 lp, float la);
vec3 atmosAmbient(vec3 light);
vec3 atmosAffectDirectionalLight(float lightIntensity);
vec3 scaleDownLight(vec3 light);
vec3 scaleUpLight(vec3 light);
vec4 sumLights(vec3 pos, vec3 norm, vec4 color, vec4 baseLight)
{
vec4 col;
col.a = color.a;
// Add windlight lights
col.rgb = atmosAffectDirectionalLight(calcDirectionalLight(norm, gl_LightSource[0].position.xyz));
col.rgb += atmosAmbient(baseLight.rgb);
col.rgb = scaleUpLight(col.rgb);
// Collect normal lights (need to be divided by two, as we later multiply by 2)
col.rgb += gl_LightSource[2].diffuse.rgb*calcPointLight(pos, norm, gl_LightSource[2].position, gl_LightSource[2].linearAttenuation);
col.rgb += gl_LightSource[3].diffuse.rgb*calcPointLight(pos, norm, gl_LightSource[3].position, gl_LightSource[3].linearAttenuation);
col.rgb += gl_LightSource[4].diffuse.rgb*calcPointLight(pos, norm, gl_LightSource[4].position, gl_LightSource[4].linearAttenuation);
col.rgb += gl_LightSource[5].diffuse.rgb*calcPointLight(pos, norm, gl_LightSource[5].position, gl_LightSource[5].linearAttenuation);
col.rgb += gl_LightSource[6].diffuse.rgb*calcPointLight(pos, norm, gl_LightSource[6].position, gl_LightSource[6].linearAttenuation);
col.rgb += gl_LightSource[7].diffuse.rgb*calcPointLight(pos, norm, gl_LightSource[7].position, gl_LightSource[7].linearAttenuation);
col.rgb += gl_LightSource[1].diffuse.rgb*calcDirectionalLight(norm, gl_LightSource[1].position.xyz);
col.rgb = scaleDownLight(col.rgb);
col.rgb = min(col.rgb*color.rgb, 1.0);
return col;
}
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