ray-intersection.glsl

vec3 calcRayIntersection( vec3 pos )
{
    vec3 retPos = pos;
    if (rayPosition.x > pos.x - 1 &&
        rayPosition.x < pos.x + 1 &&
        rayPosition.y > pos.y - 1 &&
        rayPosition.y < pos.y + 1 &&
        rayPosition.z > pos.z - 1 &&
        rayPosition.z < pos.z + 1 &&
        connection[0] != -1 && connection[1] != -1 &&
        connection[2] != -1 && connection[3] != -1) {
        retPos = vec3(rayPosition.x, rayPosition.y, rayPosition.z);
    }
    return retPos;
}