GPU Pro 6

1. Hybrid Ray Tracing on a PowerVR GPU 361

vec3 CalcVirtualInRay ()

{

vec2 uv = rl_FrameCoord . xy/ rl_FrameSize . xy ;

vec3 left = mix( frustumRay [0] , frustumRay [1] , uv . y );

vec3 right = mix ( frustumRay [2] , frustumRay [3] , uv . y );

vec3 cameraRay = mix ( left , right , uv . x );

return cameraRay ;

}

void DoReflection ( vec4 normal , vec3 position , float reflectivity )

{

vec3 inRay = CalcVirtualInRay () ;

vec3 reflection = reflect( inRay , normal);

createRay () ;

rl_OutRay . direction = reflection ;

rl_OutRay . origin = position ;

emitRay () ;

}

Listing 1.7. Reflection in hybrid renderer.

Alpha blending causes many artifacts, as it bares little relation ...