From 81bb6873f1c0291fecbf6e429ad15ac3db66a4c0 Mon Sep 17 00:00:00 2001
From: Aki <please@ignore.pl>
Date: Tue, 12 Mar 2024 22:07:03 +0100
Subject: Legal notices updated

Rename contrib -> third-party intendes to express the origin and purpose
of that part of the code better. I plan to readd contrib/ again but with
more in-project things like bash-completions, dev workflow scripts etc.
---
 third-party/Opcode/Ice/IceRay.h | 98 +++++++++++++++++++++++++++++++++++++++++
 1 file changed, 98 insertions(+)
 create mode 100644 third-party/Opcode/Ice/IceRay.h

(limited to 'third-party/Opcode/Ice/IceRay.h')

diff --git a/third-party/Opcode/Ice/IceRay.h b/third-party/Opcode/Ice/IceRay.h
new file mode 100644
index 0000000..4c0d6d9
--- /dev/null
+++ b/third-party/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 IcePoint& orig, const IcePoint& dir) : mOrig(orig), mDir(dir)	{}
+		//! Copy constructor
+		inline_					Ray(const Ray& ray) : mOrig(ray.mOrig), mDir(ray.mDir)				{}
+		//! Destructor
+		inline_					~Ray()																{}
+
+						float	SquareDistance(const IcePoint& point, float* t=null)	const;
+		inline_			float	Distance(const IcePoint& point, float* t=null)			const			{ return sqrtf(SquareDistance(point, t));	}
+
+						IcePoint	mOrig;		//!< Ray origin
+						IcePoint	mDir;		//!< Normalized direction
+	};
+
+	inline_ void ComputeReflexionVector(IcePoint& reflected, const IcePoint& incoming_dir, const IcePoint& outward_normal)
+	{
+		reflected = incoming_dir - outward_normal * 2.0f * (incoming_dir|outward_normal);
+	}
+
+	inline_ void ComputeReflexionVector(IcePoint& reflected, const IcePoint& source, const IcePoint& impact, const IcePoint& normal)
+	{
+		IcePoint V = impact - source;
+		reflected = V - normal * 2.0f * (V|normal);
+	}
+
+	inline_ void DecomposeVector(IcePoint& normal_compo, IcePoint& tangent_compo, const IcePoint& outward_dir, const IcePoint& 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(IcePoint& local_dir, const IcePoint& 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(IcePoint& local_pt, const IcePoint& 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__
-- 
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