2 * ICE / OPCODE - Optimized Collision Detection
3 * http://www.codercorner.com/Opcode.htm
5 * Copyright (c) 2001-2008 Pierre Terdiman, pierre@codercorner.com
7 This software is provided 'as-is', without any express or implied warranty.
8 In no event will the authors be held liable for any damages arising from the use of this software.
9 Permission is granted to anyone to use this software for any purpose,
10 including commercial applications, and to alter it and redistribute it freely,
11 subject to the following restrictions:
13 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.
14 2. Altered source versions must be plainly marked as such, and must not be misrepresented as being the original software.
15 3. This notice may not be removed or altered from any source distribution.
17 ///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
19 * Contains code for segments.
21 * \author Pierre Terdiman
22 * \date April, 4, 2000
24 ///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
26 ///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
28 #ifndef __ICESEGMENT_H__
29 #define __ICESEGMENT_H__
31 class ICEMATHS_API Segment
37 inline_ Segment(const Point& p0, const Point& p1) : mP0(p0), mP1(p1) {}
39 inline_ Segment(const Segment& seg) : mP0(seg.mP0), mP1(seg.mP1) {}
43 inline_ const Point& GetOrigin() const { return mP0; }
44 inline_ Point ComputeDirection() const { return mP1 - mP0; }
45 inline_ void ComputeDirection(Point& dir) const { dir = mP1 - mP0; }
46 inline_ float ComputeLength() const { return mP1.Distance(mP0); }
47 inline_ float ComputeSquareLength() const { return mP1.SquareDistance(mP0); }
49 inline_ void SetOriginDirection(const Point& origin, const Point& direction)
55 ///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
57 * Computes a point on the segment
58 * \param pt [out] point on segment
59 * \param t [in] point's parameter [t=0 => pt = mP0, t=1 => pt = mP1]
61 ///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
62 inline_ void ComputePoint(Point& pt, float t) const { pt = mP0 + t * (mP1 - mP0); }
64 float SquareDistance(const Point& point, float* t=null) const;
65 inline_ float Distance(const Point& point, float* t=null) const { return sqrtf(SquareDistance(point, t)); }
67 Point mP0; //!< Start of segment
68 Point mP1; //!< End of segment
71 #endif // __ICESEGMENT_H__