/usr/include/ClanLib-1.0/ClanLib/Core/Math/point.h is in libclanlib-dev 1.0~svn3827-3build1.
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** ClanLib SDK
** Copyright (c) 1997-2005 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):
**
** Magnus Norddahl
** (if your name is missing here, please add it)
*/
//! clanCore="Math"
//! header=core.h
#ifndef header_point
#define header_point
#if _MSC_VER > 1000
#pragma once
#endif
#include "math.h"
class CL_Pointf;
//: 2D (x,y) point structure.
//- !group=Core/Math!
//- !header=core.h!
class CL_Point
{
// Construction:
public:
//: Constructs a point.
//param x: Initial x value.
//param y: Initial y value.
//param p: Point to use for initial values.
CL_Point()
{ return; }
CL_Point(int x, int y)
: x(x), y(y) { }
CL_Point(const CL_Point &p)
{ x = p.x; y = p.y; }
explicit CL_Point(const CL_Pointf& p);
// Operations:
public:
//: Return a rotated version of this point.
//param hotspot: The point around which to rotate.
//param angle: The amount of degrees to rotate by, clockwise.
CL_Point rotate(
const CL_Point &hotspot,
float angle) const
{
//Move the hotspot to 0,0
CL_Point r(x - hotspot.x, y - hotspot.y);
//Do some Grumbel voodoo.
// Because MSVC sucks ass wrt standards compliance, it gets it own special function calls
#ifdef _MSC_VER
const float c = (float) sqrt((float)r.x*(float)r.x + (float)r.y*(float)r.y);
const float nw = (float)(atan2((float)r.y, (float)r.x) + ((angle + 180) * M_PI / 180));
r.x = (int)((sin(1.5 * M_PI - nw) * c) + 0.5) + hotspot.x;
r.y = -(int)((sin(nw) * c) + 0.5) + hotspot.y;
#else
const float c = (float) std::sqrt((float)r.x*(float)r.x + (float)r.y*(float)r.y);
const float nw = (float)(std::atan2((float)r.y, (float)r.x) + ((angle + 180) * M_PI / 180));
r.x = (int)((std::sin(1.5 * M_PI - nw) * c) + 0.5) + hotspot.x;
r.y = -(int)((std::sin(nw) * c) + 0.5) + hotspot.y;
#endif
return r;
}
//: Return the distance to another point.
//param CL_Point &p: The other point.
int distance( const CL_Point &p ) const
{
#ifdef _MSC_VER
return int(sqrt(double((x-p.x)*(x-p.x) + (y-p.y)*(y-p.y))) + 0.5f);
#else
return int(std::sqrt(double((x-p.x)*(x-p.x) + (y-p.y)*(y-p.y))) + 0.5f);
#endif
}
//: Translate point.
CL_Point &operator+=(const CL_Point &p)
{ x += p.x; y += p.y; return *this; }
//: Translate point negatively.
CL_Point &operator-=(const CL_Point &p)
{ x -= p.x; y -= p.y; return *this; }
//: Point + Point operator.
CL_Point operator+(const CL_Point &p) const
{ return CL_Point(x + p.x, y + p.y); }
//: Point - Point operator.
CL_Point operator-(const CL_Point &p) const
{ return CL_Point(x - p.x, y - p.y); }
//: Point == Point operator (deep compare)
bool operator==(const CL_Point &p) const
{ return (x == p.x) && (y == p.y); }
//: Point != Point operator (deep compare)
bool operator!=(const CL_Point &p) const
{ return (x != p.x) || (y != p.y); }
// Attributes:
public:
//: X coordinate.
int x;
//: Y coordinate.
int y;
};
//: 2D (x,y) floating point point structure.
class CL_Pointf
{
// Construction:
public:
//: Constructs a point.
//param x: Initial x value.
//param y: Initial y value.
//param p: Point to use for initial values.
CL_Pointf()
{ return; }
CL_Pointf(const CL_Point& p)
: x((float)p.x), y((float)p.y)
{}
CL_Pointf(float x, float y)
: x(x), y(y) { }
CL_Pointf(const CL_Pointf &p)
{ x = p.x; y = p.y; }
// Operations:
public:
//: Return a rotated version of this point.
//param hotspot: The point around which to rotate.
//param angle: The amount of degrees to rotate by, clockwise.
CL_Pointf rotate(
const CL_Pointf &hotspot,
float angle) const
{
//Move the hotspot to 0,0
CL_Pointf r(x - hotspot.x, y - hotspot.y);
//Do some Grumbel voodoo.
// MSVC is doesn't recognize std::sin and friends
#ifdef _MSC_VER
const float c = (float)(sqrt(r.x*r.x + r.y*r.y));
const float nw = (float)((float)atan2(r.y, r.x) + ((angle + 180) * M_PI / 180));
r.x = ((float)(sin(1.5 * M_PI - nw)) * c) + hotspot.x;
r.y = -((float)(sin(nw)) * c) + hotspot.y;
#else
const float c = (float)(std::sqrt(r.x*r.x + r.y*r.y));
const float nw = (float)((float)std::atan2(r.y, r.x) + ((angle + 180) * M_PI / 180));
r.x = ((float)(std::sin(1.5 * M_PI - nw)) * c) + hotspot.x;
r.y = -((float)(std::sin(nw)) * c) + hotspot.y;
#endif
return r;
}
//: Return the distance to another point.
//param CL_Pointf &p: The other point.
float distance( const CL_Pointf &p ) const
{
#ifdef _MSC_VER
return (float) sqrt((x-p.x)*(x-p.x) + (y-p.y)*(y-p.y));
#else
return std::sqrt((x-p.x)*(x-p.x) + (y-p.y)*(y-p.y));
#endif
}
//: Translate point.
CL_Pointf &operator+=(const CL_Pointf &p)
{ x += p.x; y += p.y; return *this; }
//: Translate point negatively.
CL_Pointf &operator-=(const CL_Pointf &p)
{ x -= p.x; y -= p.y; return *this; }
//: Point + Point operator.
CL_Pointf operator+(const CL_Pointf &p) const
{ return CL_Pointf(x + p.x, y + p.y); }
//: Point - Point operator.
CL_Pointf operator-(const CL_Pointf &p) const
{ return CL_Pointf(x - p.x, y - p.y); }
//: Point == Point operator (deep compare)
bool operator==(const CL_Pointf &p) const
{ return (x == p.x) && (y == p.y); }
//: Point != Point operator (deep compare)
bool operator!=(const CL_Pointf &p) const
{ return (x != p.x) || (y != p.y); }
// Attributes:
public:
//: X coordinate.
float x;
//: Y coordinate.
float y;
};
inline CL_Point::CL_Point(const CL_Pointf& p)
: x(static_cast<int>(p.x)),
y(static_cast<int>(p.y))
{}
#endif
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