float occlusion( vec2 uv, vec2 duv, float z ){
float z00 = textureLod( texZ, uv+duv.xy, 0 ).r;
float z11 = textureLod( texZ, uv-duv.xy, 0 ).r;
duv = vec2(duv.y,-duv.x);
float z10 = textureLod( texZ, uv+duv, 0 ).r;
float z01 = textureLod( texZ, uv-duv, 0 ).r;
float z1 = z00 + z11;
float z2 = z10 + z01;
//return (z1+z2)*0.25;
return ( z - min( z1, z2 )*0.5 )/dot(duv,duv);
//return max( z1, z2 )*0.5;
}
void main(){
vec2 uv = (gl_FragCoord.xy / resolution).xy;
float z = textureLod( texZ, uv, 0 ).r;
//float dzsum = 0;
//float z = textureLod( texZ, uv, 0 ).r;
//float dz = z - textureLod( texZ, uv, 3 ).r; dzsum += dz;
//float d = 0.02 + 0.008*sin(uv.x*uv.y*48145.0), w = 0.0;
//float d = 0.02 + 0.008*sin(z*48145989.0), w = 0.0;
//float d = 0.02 + 0.008*sin(z*481009.0), w = 0.0;
//float d = 0.02 + 0.005*cos(dot(uv,vec2(1000.0,500.0))) + 0.005*sin(z*3000000.0);
float d = 0.01 * ( 1.0+ 0.25*cos(dot(uv,vec2(2000.0,1000.0))));
//duv = d*fract(sin(1548.0*vec2( uv.x*uv.y, 100* uv.x-uv.y ))*43758.5453);
//float phi = 1548748.0 * uv.x*uv.y; vec2 duv = 2*d * vec2( sin( phi ), cos( phi ) );
//duv = vec2( 1.4, 1.4 );
float occ;
float occ1 = occlusion( uv, vec2( 0.5*d, 0.0 ), z )*1.0;
float occ2 = occlusion( uv, vec2( 1.4*d, 1.4*d ), z )*2.0;
float occ3 = occlusion( uv, vec2( 4.0*d, 0.0 ), z )*4.0;
//occ = max( occ1, occ2 );
//occ = max( occ , occ3 );
occ = occ1 + occ2 + occ3;
//occ = occ1;
if( occ > 0 ){
occ = 2.0*occ/(0.2 + occ );
vec3 zcolor = vec3( occ, occ, occ );
color = textureLod( texRGB, uv, 0 ).rgb - zcolor;
//color = zcolor;
}else{
color = textureLod( texRGB, uv, 0 ).rgb;
}
}
void main()\n\
{\n\
vec3 tx = normalize(in_texcoords);\n\
out_color = vec4(textureLod(uniform_texture, tx, 0.0).xyz * uniform_strength, 1.0);\n\
}";
