float PointInShadow(const glm::vec3& point, RayTracerState& state) {
Ray shadow_ray(point, position-point);
const float z_offset = 10e-4f;
float t = -1;
float t_min = std::numeric_limits<float>::max();
int k_min=-1;
//Loop through all the objects, to find the closest intersection, if any
for (unsigned int k=0; k<state.getScene().size(); ++k) {
t = state.getScene().at(k)->intersect(shadow_ray);
//skipping the cubemap
if(t >= (std::numeric_limits<float>::max()))
continue;
if (t > z_offset && t <= t_min) {
k_min = k;
t_min = t;
}
}
if (k_min >= 0) {
glm::vec3 q = point + shadow_ray.getDirection()*t_min;
float light_length = glm::length(position-point);
float q_lenght = glm::length(q);
if(q_lenght < light_length)
return 0.0f;
}
return 1.0f;
}
