line_segment.h

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/*
**  ClanLib SDK
**  Copyright (c) 1997-2009 The ClanLib Team
**
**  This software is provided 'as-is', without any express or implied
**  warranty.  In no event will the authors be held liable for any damages
**  arising from the use of this software.
**
**  Permission is granted to anyone to use this software for any purpose,
**  including commercial applications, and to alter it and redistribute it
**  freely, subject to the following restrictions:
**
**  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.
**  2. Altered source versions must be plainly marked as such, and must not be
**     misrepresented as being the original software.
**  3. This notice may not be removed or altered from any source distribution.
**
**  Note: Some of the libraries ClanLib may link to may have additional
**  requirements or restrictions.
**
**  File Author(s):
**
**    Mark Page
*/


#pragma once

#include "../api_core.h"

template<typename Type>
class CL_LineSegment2x;

template<typename Type>
class CL_LineSegment3x;

template<typename Type>
class CL_Vec2;

template<typename Type>
class CL_Vec3;

template<typename Type>
class CL_Rectx;

class CL_Angle;

template<typename Type>
class CL_LineSegment3x
{
public:
        CL_Vec3<Type> p;

        // \brief End point on the line
        CL_Vec3<Type> q;

        CL_LineSegment3x() { }
        CL_LineSegment3x(const CL_LineSegment3x<Type> &copy) { p = copy.p; q = copy.q;}
        CL_LineSegment3x(const CL_Vec3<Type> &point_p, const CL_Vec3<Type> &point_q) { p = point_p; q = point_q; }

public:
        CL_Vec3<Type> get_midpoint() const { return CL_Vec3<Type>( (q.x + p.x)/((Type)2), (q.y + p.y)/((Type)2), (q.z + p.z)/((Type)2) ); };

        Type point_distance(const CL_Vec3<Type> &point, CL_Vec3<Type> &dest_intercept) const;

public:
        CL_LineSegment3x<Type> &operator = (const CL_LineSegment3x<Type>& copy) { p = copy.p; q = copy.q; return *this; }

        bool operator == (const CL_LineSegment3x<Type>& line) const {return ((p == line.p) && (q == line.q));}

        bool operator != (const CL_LineSegment3x<Type>& line) const {return ((p != line.p) || (q != line.q));}
};

template<typename Type>
class CL_LineSegment2x
{
public:
        CL_Vec2<Type> p;

        // \brief End point on the line
        CL_Vec2<Type> q;

        CL_LineSegment2x() { }
        CL_LineSegment2x(const CL_LineSegment2x<Type> &copy) { p = copy.p; q = copy.q;}
        CL_LineSegment2x(const CL_Vec2<Type> &point_p, const CL_Vec2<Type> &point_q) { p = point_p; q = point_q; }

public:
        CL_Vec2<Type> get_midpoint() const { return CL_Vec2<Type>( (q.x + p.x)/((Type)2), (q.y + p.y)/((Type)2) ); };

        Type point_distance(const CL_Vec2<Type> &point);

        bool collinear(const CL_LineSegment2x<Type> second) const;

        bool intersects( const CL_LineSegment2x<Type> second, bool collinear_intersect ) const;

        CL_Vec2<Type> get_intersection( const CL_LineSegment2x<Type> second, bool &intersect) const;

        Type point_right_of_line( CL_Vec2<Type> point ) const {return (q.x - p.x) * (point.y - p.y) - (point.x - p.x) * (q.y - p.y);}

        CL_Vec2<Type> normal() const;


public:
        CL_LineSegment2x<Type> &clip(const CL_Rectx<Type> &rect, bool &clipped);

public:
        CL_LineSegment2x<Type> &operator = (const CL_LineSegment2x<Type>& copy) { p = copy.p; q = copy.q; return *this; }

        bool operator == (const CL_LineSegment2x<Type>& line) const {return ((p == line.p) && (q == line.q));}

        bool operator != (const CL_LineSegment2x<Type>& line) const {return ((p != line.p) || (q != line.q));}
};

class CL_LineSegment2 : public CL_LineSegment2x<int>
{
public:
        CL_LineSegment2() : CL_LineSegment2x<int>() {}
        CL_LineSegment2(const CL_LineSegment2x<int> &copy) : CL_LineSegment2x<int>(copy) {}
        CL_LineSegment2(const CL_Vec2<int> &point_p, const CL_Vec2<int> &point_q) : CL_LineSegment2x<int>(point_p, point_q) {}
};

class CL_LineSegment2f : public CL_LineSegment2x<float>
{
public:
        CL_LineSegment2f() : CL_LineSegment2x<float>() {}
        CL_LineSegment2f(const CL_LineSegment2x<float> &copy) : CL_LineSegment2x<float>(copy) {}
        CL_LineSegment2f(const CL_Vec2<float> &point_p, const CL_Vec2<float> &point_q) : CL_LineSegment2x<float>(point_p, point_q) {}
};

class CL_LineSegment2d : public CL_LineSegment2x<double>
{
public:
        CL_LineSegment2d() : CL_LineSegment2x<double>() {}
        CL_LineSegment2d(const CL_LineSegment2x<double> &copy) : CL_LineSegment2x<double>(copy) {}
        CL_LineSegment2d(const CL_Vec2<double> &point_p, const CL_Vec2<double> &point_q) : CL_LineSegment2x<double>(point_p, point_q) {}
};

class CL_LineSegment3 : public CL_LineSegment3x<int>
{
public:
        CL_LineSegment3() : CL_LineSegment3x<int>() {}
        CL_LineSegment3(const CL_LineSegment3x<int> &copy) : CL_LineSegment3x<int>(copy) {}
        CL_LineSegment3(const CL_Vec3<int> &point_p, const CL_Vec3<int> &point_q) : CL_LineSegment3x<int>(point_p, point_q) {}
};

class CL_LineSegment3f : public CL_LineSegment3x<float>
{
public:
        CL_LineSegment3f() : CL_LineSegment3x<float>() {}
        CL_LineSegment3f(const CL_LineSegment3x<float> &copy) : CL_LineSegment3x<float>(copy) {}
        CL_LineSegment3f(const CL_Vec3<float> &point_p, const CL_Vec3<float> &point_q) : CL_LineSegment3x<float>(point_p, point_q) {}
};

class CL_LineSegment3d : public CL_LineSegment3x<double>
{
public:
        CL_LineSegment3d() : CL_LineSegment3x<double>() {}
        CL_LineSegment3d(const CL_LineSegment3x<double> &copy) : CL_LineSegment3x<double>(copy) {}
        CL_LineSegment3d(const CL_Vec3<double> &point_p, const CL_Vec3<double> &point_q) : CL_LineSegment3x<double>(point_p, point_q) {}
};

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