From e33e19d0587146859d48a134ec9fd94e7b7ba5cd Mon Sep 17 00:00:00 2001
From: "FWoltermann@gmail.com"
 <FWoltermann@gmail.com@076cb2c4-205e-83fd-5cf3-1be9aa105544>
Date: Thu, 8 Dec 2011 14:53:40 +0000
Subject: Initial upload

---
 Opcode/Ice/IceRay.h | 98 +++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 98 insertions(+)
 create mode 100644 Opcode/Ice/IceRay.h

(limited to 'Opcode/Ice/IceRay.h')

diff --git a/Opcode/Ice/IceRay.h b/Opcode/Ice/IceRay.h
new file mode 100644
index 0000000..f99a78b
--- /dev/null
+++ b/Opcode/Ice/IceRay.h
@@ -0,0 +1,98 @@
+///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+/**
+ *	Contains code for rays.
+ *	\file		IceRay.h
+ *	\author		Pierre Terdiman
+ *	\date		April, 4, 2000
+ */
+///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+
+///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+// Include Guard
+#ifndef __ICERAY_H__
+#define __ICERAY_H__
+
+	class ICEMATHS_API Ray
+	{
+		public:
+		//! Constructor
+		inline_					Ray()																{}
+		//! Constructor
+		inline_					Ray(const Point& orig, const Point& dir) : mOrig(orig), mDir(dir)	{}
+		//! Copy constructor
+		inline_					Ray(const Ray& ray) : mOrig(ray.mOrig), mDir(ray.mDir)				{}
+		//! Destructor
+		inline_					~Ray()																{}
+
+						float	SquareDistance(const Point& point, float* t=null)	const;
+		inline_			float	Distance(const Point& point, float* t=null)			const			{ return sqrtf(SquareDistance(point, t));	}
+
+						Point	mOrig;		//!< Ray origin
+						Point	mDir;		//!< Normalized direction
+	};
+
+	inline_ void ComputeReflexionVector(Point& reflected, const Point& incoming_dir, const Point& outward_normal)
+	{
+		reflected = incoming_dir - outward_normal * 2.0f * (incoming_dir|outward_normal);
+	}
+
+	inline_ void ComputeReflexionVector(Point& reflected, const Point& source, const Point& impact, const Point& normal)
+	{
+		Point V = impact - source;
+		reflected = V - normal * 2.0f * (V|normal);
+	}
+
+	inline_ void DecomposeVector(Point& normal_compo, Point& tangent_compo, const Point& outward_dir, const Point& outward_normal)
+	{
+		normal_compo = outward_normal * (outward_dir|outward_normal);
+		tangent_compo = outward_dir - normal_compo;
+	}
+
+	///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+	/**
+	 *	Transforms a direction vector from world space to local space
+	 *	\param		local_dir	[out] direction vector in local space
+	 *	\param		world_dir	[in] direction vector in world space
+	 *	\param		world		[in] world transform
+	 */
+	///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+	inline_ void ComputeLocalDirection(Point& local_dir, const Point& world_dir, const Matrix4x4& world)
+	{
+		// Get world direction back in local space
+//		Matrix3x3 InvWorld = world;
+//		local_dir = InvWorld * world_dir;
+		local_dir = Matrix3x3(world) * world_dir;
+	}
+
+	///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+	/**
+	 *	Transforms a position vector from world space to local space
+	 *	\param		local_pt	[out] position vector in local space
+	 *	\param		world_pt	[in] position vector in world space
+	 *	\param		world		[in] world transform
+	 */
+	///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+	inline_ void ComputeLocalPoint(Point& local_pt, const Point& world_pt, const Matrix4x4& world)
+	{
+		// Get world vertex back in local space
+		Matrix4x4 InvWorld = world;
+		InvWorld.Invert();
+		local_pt = world_pt * InvWorld;
+	}
+
+	///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+	/**
+	 *	Transforms a ray from world space to local space
+	 *	\param		local_ray	[out] ray in local space
+	 *	\param		world_ray	[in] ray in world space
+	 *	\param		world		[in] world transform
+	 */
+	///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+	inline_ void ComputeLocalRay(Ray& local_ray, const Ray& world_ray, const Matrix4x4& world)
+	{
+		// Get world ray back in local space
+		ComputeLocalDirection(local_ray.mDir, world_ray.mDir, world);
+		ComputeLocalPoint(local_ray.mOrig, world_ray.mOrig, world);
+	}
+
+#endif // __ICERAY_H__
-- 
cgit v1.1