72 lines
3.5 KiB
C
72 lines
3.5 KiB
C
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/*
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* ICE / 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 code for segments.
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* \file IceSegment.h
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* \author Pierre Terdiman
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* \date April, 4, 2000
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*/
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///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
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///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
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// Include Guard
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#ifndef __ICESEGMENT_H__
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#define __ICESEGMENT_H__
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class ICEMATHS_API Segment
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{
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public:
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//! Constructor
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inline_ Segment() {}
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//! Constructor
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inline_ Segment(const Point& p0, const Point& p1) : mP0(p0), mP1(p1) {}
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//! Copy constructor
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inline_ Segment(const Segment& seg) : mP0(seg.mP0), mP1(seg.mP1) {}
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//! Destructor
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inline_ ~Segment() {}
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inline_ const Point& GetOrigin() const { return mP0; }
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inline_ Point ComputeDirection() const { return mP1 - mP0; }
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inline_ void ComputeDirection(Point& dir) const { dir = mP1 - mP0; }
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inline_ float ComputeLength() const { return mP1.Distance(mP0); }
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inline_ float ComputeSquareLength() const { return mP1.SquareDistance(mP0); }
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inline_ void SetOriginDirection(const Point& origin, const Point& direction)
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{
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mP0 = mP1 = origin;
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mP1 += direction;
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}
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///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
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/**
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* Computes a point on the segment
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* \param pt [out] point on segment
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* \param t [in] point's parameter [t=0 => pt = mP0, t=1 => pt = mP1]
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*/
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///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
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inline_ void ComputePoint(Point& pt, float t) const { pt = mP0 + t * (mP1 - mP0); }
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float SquareDistance(const Point& point, float* t=null) const;
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inline_ float Distance(const Point& point, float* t=null) const { return sqrtf(SquareDistance(point, t)); }
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Point mP0; //!< Start of segment
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Point mP1; //!< End of segment
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};
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#endif // __ICESEGMENT_H__
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