110 lines
5.0 KiB
C
110 lines
5.0 KiB
C
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/*
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* OPCODE - Optimized Collision Detection
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* http://www.codercorner.com/Opcode.htm
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*
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* Copyright (c) 2001-2008 Pierre Terdiman, pierre@codercorner.com
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This software is provided 'as-is', without any express or implied warranty.
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In no event will the authors be held liable for any damages arising from the use of this software.
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Permission is granted to anyone to use this software for any purpose,
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including commercial applications, and to alter it and redistribute it freely,
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subject to the following restrictions:
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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.
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2. Altered source versions must be plainly marked as such, and must not be misrepresented as being the original software.
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3. This notice may not be removed or altered from any source distribution.
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*/
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///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
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/**
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* Contains common classes & defs used in OPCODE.
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* \file OPC_Common.h
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* \author Pierre Terdiman
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* \date March, 20, 2001
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*/
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///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
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///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
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// Include Guard
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#ifndef __OPC_COMMON_H__
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#define __OPC_COMMON_H__
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// [GOTTFRIED]: Just a small change for readability.
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#ifdef OPC_CPU_COMPARE
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#define GREATER(x, y) AIR(x) > IR(y)
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#else
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#define GREATER(x, y) fabsf(x) > (y)
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#endif
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class OPCODE_API CollisionAABB
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{
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public:
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//! Constructor
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inline_ CollisionAABB() {}
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//! Constructor
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inline_ CollisionAABB(const AABB& b) { b.GetCenter(mCenter); b.GetExtents(mExtents); }
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//! Destructor
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inline_ ~CollisionAABB() {}
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//! Get min point of the box
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inline_ void GetMin(Point& min) const { min = mCenter - mExtents; }
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//! Get max point of the box
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inline_ void GetMax(Point& max) const { max = mCenter + mExtents; }
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//! Get component of the box's min point along a given axis
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inline_ float GetMin(udword axis) const { return mCenter[axis] - mExtents[axis]; }
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//! Get component of the box's max point along a given axis
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inline_ float GetMax(udword axis) const { return mCenter[axis] + mExtents[axis]; }
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///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
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/**
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* Setups an AABB from min & max vectors.
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* \param min [in] the min point
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* \param max [in] the max point
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*/
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///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
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inline_ void SetMinMax(const Point& min, const Point& max) { mCenter = (max + min)*0.5f; mExtents = (max - min)*0.5f; }
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///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
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/**
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* Checks a box is inside another box.
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* \param box [in] the other box
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* \return true if current box is inside input box
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*/
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///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
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inline_ BOOL IsInside(const CollisionAABB& box) const
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{
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if(box.GetMin(0)>GetMin(0)) return FALSE;
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if(box.GetMin(1)>GetMin(1)) return FALSE;
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if(box.GetMin(2)>GetMin(2)) return FALSE;
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if(box.GetMax(0)<GetMax(0)) return FALSE;
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if(box.GetMax(1)<GetMax(1)) return FALSE;
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if(box.GetMax(2)<GetMax(2)) return FALSE;
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return TRUE;
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}
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Point mCenter; //!< Box center
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Point mExtents; //!< Box extents
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};
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class OPCODE_API QuantizedAABB
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{
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public:
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//! Constructor
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inline_ QuantizedAABB() {}
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//! Destructor
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inline_ ~QuantizedAABB() {}
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sword mCenter[3]; //!< Quantized center
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uword mExtents[3]; //!< Quantized extents
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};
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//! Quickly rotates & translates a vector
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inline_ void TransformPoint(Point& dest, const Point& source, const Matrix3x3& rot, const Point& trans)
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{
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dest.x = trans.x + source.x * rot.m[0][0] + source.y * rot.m[1][0] + source.z * rot.m[2][0];
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dest.y = trans.y + source.x * rot.m[0][1] + source.y * rot.m[1][1] + source.z * rot.m[2][1];
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dest.z = trans.z + source.x * rot.m[0][2] + source.y * rot.m[1][2] + source.z * rot.m[2][2];
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}
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#endif //__OPC_COMMON_H__
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