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/**
* @file sumLightsV.glsl
*
* $LicenseInfo:firstyear=2005&license=viewerlgpl$
* $/LicenseInfo$
*/
float calcDirectionalLight(vec3 n, vec3 l);
float calcPointLightOrSpotLight(vec3 v, vec3 n, vec4 lp, vec3 ln, float la, float is_pointlight);
vec3 atmosAmbient(vec3 light);
vec3 atmosAffectDirectionalLight(float lightIntensity);
vec3 scaleDownLight(vec3 light);
vec4 sumLights(vec3 pos, vec3 norm, vec4 color, vec4 baseLight)
{
vec4 col = vec4(0.0, 0.0, 0.0, color.a);
// Collect normal lights (need to be divided by two, as we later multiply by 2)
col.rgb += gl_LightSource[1].diffuse.rgb * calcDirectionalLight(norm, gl_LightSource[1].position.xyz);
col.rgb += gl_LightSource[2].diffuse.rgb * calcPointLightOrSpotLight(pos, norm, gl_LightSource[2].position, gl_LightSource[2].spotDirection.xyz, gl_LightSource[2].linearAttenuation, gl_LightSource[2].specular.a);
col.rgb += gl_LightSource[3].diffuse.rgb * calcPointLightOrSpotLight(pos, norm, gl_LightSource[3].position, gl_LightSource[3].spotDirection.xyz, gl_LightSource[3].linearAttenuation, gl_LightSource[3].specular.a);
//col.rgb += gl_LightSource[4].diffuse.rgb * calcPointLightOrSpotLight(pos, norm, gl_LightSource[4].position, gl_LightSource[4].spotDirection.xyz, gl_LightSource[4].linearAttenuation, gl_LightSource[4].specular.a);
col.rgb = scaleDownLight(col.rgb);
// Add windlight lights
col.rgb += atmosAmbient(baseLight.rgb);
col.rgb += atmosAffectDirectionalLight(calcDirectionalLight(norm, gl_LightSource[0].position.xyz));
col.rgb = min(col.rgb*color.rgb, 1.0);
return col;
}
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