source: GTP/trunk/Lib/Illum/GPUObscurancesGT/src/render.frag @ 930

uniform sampler2D texture;
uniform vec3 LightPos;
uniform vec3  Kd;
uniform sampler2D shadowMap;
uniform sampler2D spotlight;
uniform float modeDirect;
uniform float modeLight;
uniform float modeIndirect;
uniform float modeAmbient;
uniform vec3 intensity;
uniform vec3 lpower;
uniform vec3 factor;

varying vec4 position;
varying vec3 color;
varying vec2 texCoord;
varying vec3 normal;
varying vec3 lightVect;
varying vec4 shadowCoord;
varying vec3 position1;


void main()
{
        vec4 aux = tex2D(texture,texCoord);

        normal = normalize(normal);
        
        float depth = length(lightVect);

        lightVect /= depth;
        
        vec3 L; 
        float diffuseLight; 
        vec3 diffuse = vec3(0.0, 0.0, 0.0);
        float sum = 0;
        float sum2 = 0;
        float x, y;
        float s;
        float ac;
        float shadow = 0.0;
        float sLight;
        
        if (modeDirect == 1.0)
        {
                L = normalize(LightPos - position1.xyz);
                diffuseLight = lpower * max(dot(normalize(normal), L), 0);
                diffuse = Kd * diffuseLight;                    

                vec3 b = shadowCoord.xyz / shadowCoord.w;
                vec4 a = texture2DProj(shadowMap,shadowCoord);
                shadow = (depth < a.r + 0.01);

                shadow *= float(shadowCoord.w > 0.01);
                float variance = a.g - (a.r * a.r);
                float m_d = a.r - depth;
                float p_max = variance / (variance + m_d * m_d);
                shadow = max(p_max, shadow);
        }
        
        if (modeIndirect == 0.0) 
        {       
                if (modeAmbient == 0.0)
                {
                        if (modeDirect == 0.0) gl_FragColor = vec4(0.0,0.0,0.0,1.0);
                        else gl_FragColor = vec4(color.xyz, 1.0)* shadow * vec4(diffuse,0.0);
                }
                else 
                {
                        if (modeDirect == 0.0) gl_FragColor = vec4(1.0, 1.0, 1.0, 1.0);
                        else gl_FragColor = vec4(color.xyz, 1.0) * (vec4(intensity,1.0)*  vec4(factor,1.0) + shadow * vec4(diffuse,0.0));
                }
        }
        else
        {
                if (modeDirect == 0.0) gl_FragColor = vec4(color.xyz, 1.0)* vec4(intensity,1.0) * vec4(aux.rgb, 1.0);
                else gl_FragColor = vec4(color.xyz, 1.0) * (vec4(intensity,1.0) * vec4(aux.rgb, 1.0) + shadow * vec4(diffuse,0.0));
        }

        if (modeLight == 1.0) gl_FragColor = vec4(aux.rgb,1.0);
}