Added ray-plane intersection.

plane.hpp

@@ -0,0 +1,29 @@
+#pragma once
+#ifndef PLANE_HPP
+#define PLANE_HPP
+
+#include <glm/glm.hpp>
+
+#include "figure.hpp"
+
+using glm::vec3;
+using glm::normalize;
+
+class Plane : public Figure {
+public:
+  vec3 m_point;
+  vec3 m_normal;
+  
+  Plane(): m_point(vec3(0.0f)), m_normal(0.0f, 0.0f, 1.0f) { }
+
+  Plane(float x, float y, float z, float nx, float ny, float nz): m_point(vec3(x, y, z)), m_normal(normalize(vec3(nx, ny, nz))) { }
+
+  Plane(vec3 _p, vec3 _n): m_point(_p), m_normal(normalize(_n)) { }
+
+  virtual ~Plane() { }
+
+  virtual bool intersect(Ray & r, float & t, vec3 & n) const;
+};
+
+
+#endif