Started sketching the photon mapping.

photon_tracer.hpp

@@ -0,0 +1,21 @@
+#pragma once
+#ifndef PHOTON_TRACER_HPP
+#define PHOTON_TRACER_HPP
+
+#include "tracer.hpp"
+#include "kd_tree.hpp"
+
+class PhotonTracer: public Tracer {
+public:
+  PhotonTracer(): Tracer() { }
+
+  PhotonTracer(unsigned int max_depth): Tracer(max_depth) { };
+
+  virtual ~PhotonTracer();
+
+  virtual vec3 trace_ray(Ray & r, Scene * s, unsigned int rec_level) const;
+
+  void build_photon_map(kdTree & photon_map, Scene * s, const unsigned int rec_level, const size_t n_photons_per_ligth = 10000, const bool specular = false) const;
+};
+
+#endif