--- /dev/null
+#ifndef GONG_PHYSICS_CONTACT_HPP_
+#define GONG_PHYSICS_CONTACT_HPP_
+
+#include "../graphics/glm.hpp"
+
+
+namespace gong {
+namespace physics {
+
+class Object;
+
+struct Contact {
+
+ glm::vec3 point;
+ glm::vec3 normal;
+ Object *a;
+ Object *b;
+
+ Contact(const glm::vec3 &p, const glm::vec3 &n, Object *a, Object *b)
+ : point(p), normal(n), a(a), b(b) { }
+
+};
+
+}
+}
+
+#endif