From a52f89a33eeafe767520b3ebe35416506c98e8c2 Mon Sep 17 00:00:00 2001
From: Daniel Chappuis <chappuis.daniel@gmail.com>
Date: Sun, 13 Jul 2014 18:11:15 -0700
Subject: [PATCH] Add the Ray class for raycasting

---
 src/mathematics/Ray.cpp | 46 ++++++++++++++++++++++++
 src/mathematics/Ray.h   | 77 +++++++++++++++++++++++++++++++++++++++++
 2 files changed, 123 insertions(+)
 create mode 100644 src/mathematics/Ray.cpp
 create mode 100644 src/mathematics/Ray.h

diff --git a/src/mathematics/Ray.cpp b/src/mathematics/Ray.cpp
new file mode 100644
index 00000000..d617ad9c
--- /dev/null
+++ b/src/mathematics/Ray.cpp
@@ -0,0 +1,46 @@
+/********************************************************************************
+* ReactPhysics3D physics library, http://code.google.com/p/reactphysics3d/      *
+* Copyright (c) 2010-2014 Daniel Chappuis                                       *
+*********************************************************************************
+*                                                                               *
+* This software is provided 'as-is', without any express or implied warranty.   *
+* In no event will the authors be held liable for any damages arising from the  *
+* use of this software.                                                         *
+*                                                                               *
+* Permission is granted to anyone to use this software for any purpose,         *
+* including commercial applications, and to alter it and redistribute it        *
+* freely, subject to the following restrictions:                                *
+*                                                                               *
+* 1. The origin of this software must not be misrepresented; you must not claim *
+*    that you wrote the original software. If you use this software in a        *
+*    product, an acknowledgment in the product documentation would be           *
+*    appreciated but is not required.                                           *
+*                                                                               *
+* 2. Altered source versions must be plainly marked as such, and must not be    *
+*    misrepresented as being the original software.                             *
+*                                                                               *
+* 3. This notice may not be removed or altered from any source distribution.    *
+*                                                                               *
+********************************************************************************/
+
+// Libraries
+#include "Ray.h"
+
+// Namespaces
+using namespace reactphysics3d;
+
+// Constructor with arguments
+Ray::Ray(const Vector3& originPoint, const Vector3& directionVector)
+    : origin(originPoint), direction(directionVector) {
+
+}
+
+// Copy-constructor
+Ray::Ray(const Ray& ray) : origin(ray.origin), direction(ray.direction) {
+
+}
+
+// Destructor
+Ray::~Ray() {
+
+}
diff --git a/src/mathematics/Ray.h b/src/mathematics/Ray.h
new file mode 100644
index 00000000..ab4eb259
--- /dev/null
+++ b/src/mathematics/Ray.h
@@ -0,0 +1,77 @@
+/********************************************************************************
+* ReactPhysics3D physics library, http://code.google.com/p/reactphysics3d/      *
+* Copyright (c) 2010-2014 Daniel Chappuis                                       *
+*********************************************************************************
+*                                                                               *
+* This software is provided 'as-is', without any express or implied warranty.   *
+* In no event will the authors be held liable for any damages arising from the  *
+* use of this software.                                                         *
+*                                                                               *
+* Permission is granted to anyone to use this software for any purpose,         *
+* including commercial applications, and to alter it and redistribute it        *
+* freely, subject to the following restrictions:                                *
+*                                                                               *
+* 1. The origin of this software must not be misrepresented; you must not claim *
+*    that you wrote the original software. If you use this software in a        *
+*    product, an acknowledgment in the product documentation would be           *
+*    appreciated but is not required.                                           *
+*                                                                               *
+* 2. Altered source versions must be plainly marked as such, and must not be    *
+*    misrepresented as being the original software.                             *
+*                                                                               *
+* 3. This notice may not be removed or altered from any source distribution.    *
+*                                                                               *
+********************************************************************************/
+
+#ifndef REACTPHYSICS3D_RAY_H
+#define REACTPHYSICS3D_RAY_H
+
+// Libraries
+#include "Vector3.h"
+
+/// ReactPhysics3D namespace
+namespace reactphysics3d {
+
+// Class Ray
+/**
+ * This structure represents a 3D ray with a origin point and a direction.
+ */
+struct Ray {
+
+    public:
+
+        // -------------------- Attributes -------------------- //
+
+        /// Origin point of the ray
+        Vector3 origin;
+
+        /// Direction vector of the ray
+        Vector3 direction;
+
+        // -------------------- Methods -------------------- //
+
+        /// Constructor with arguments
+        Ray(const Vector3& originPoint, const Vector3& directionVector);
+
+        /// Copy-constructor
+        Ray(const Ray& ray);
+
+        /// Destructor
+        ~Ray();
+
+        /// Overloaded assignment operator
+        Ray& operator=(const Ray& ray);
+};
+
+// Assignment operator
+inline Ray& Ray::operator=(const Ray& ray) {
+    if (&ray != this) {
+        origin = ray.origin;
+        direction = ray.direction;
+    }
+    return *this;
+}
+
+}
+
+#endif