Added point lights.

point_light.hpp

@@ -0,0 +1,30 @@
+#pragma once
+#ifndef POINT_LIGHT_HPP
+#define POINT_LIGHT_HPP
+
+#include "light.hpp"
+
+class PointLight: public Light {
+public:
+  float m_const_att;
+  float m_lin_att;
+  float m_quad_att;
+
+  PointLight(): m_const_att(1.0f), m_lin_att(0.0f), m_quad_att(0.0f) {
+    m_position = vec3(0.0f);
+    m_diffuse = vec3(1.0f);
+    m_specular = vec3(1.0f);
+  }
+
+  PointLight(vec3 _p, vec3 _d, vec3 _s, float _c, float _l, float _q): m_const_att(_c), m_lin_att(_l), m_quad_att(_q) {
+    m_position = _p;
+    m_diffuse = _d;
+    m_specular = _s;
+  }
+
+  virtual vec3 direction(vec3 point);
+  virtual float distance(vec3 point);
+  virtual vec3 shade(vec3 normal, Ray & r, float t, Material & m) const;
+};
+
+#endif