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Quellcode

uniform sampler2D texture0;
uniform sampler2DShadow shadowMap0;

uniform float xPixelOffset;
uniform float yPixelOffset;

in vec4 shadowCoord;
in vec2 texCoord0;

out vec4 color;

float shadowmapping(vec2 offset){
    return textureProj(shadowMap0,
                       shadowCoord+vec4(offset.x*xPixelOffset*shadowCoord.w, 
                                        offset.y*yPixelOffset*shadowCoord.w,
                                        0.0,
                                        0.0));
}

void main(void){    
    color = texture(texture0, texCoord0.st);
    
    float shadow = 1.0;

    if(shadowCoord.w > 0.0){
        float x, y;
        
        for(y = -1.5; y <= 1.5; y += 1.0){
            for(x = -1.5; x <= 1.5; x += 1.0){
                shadow += shadowmapping(vec2(x, y));
            }
        }

        shadow /= 16.0;
    }

    color *= shadow;
}

Quellcode

return textureProj(shadowMap0,
                       shadowCoord+vec4(offset.x*xPixelOffset*shadowCoord.w, 
                                        offset.y*yPixelOffset*shadowCoord.w,
                                        -0.005,                                                     // <------------
                                        0.0));