Add rudimentary collision detection

collisions.h

@@ -0,0 +1,8 @@
+#ifndef COLLISIONS_H
+#define COLLISIONS_H
+
+#include <glm/glm.hpp>
+
+int getIntersection(glm::vec3 vec_start, glm::vec3 vec_stop, glm::vec3 P1, glm::vec3 P2, glm::vec3 P3);
+
+#endif