mirror of https://github.com/axmolengine/axmol.git
344 lines
8.3 KiB
C
344 lines
8.3 KiB
C
/****************************************************************************
|
|
Copyright (c) 2010-2012 cocos2d-x.org
|
|
Copyright (c) 2007 Scott Lembcke
|
|
Copyright (c) 2010 Lam Pham
|
|
|
|
http://www.cocos2d-x.org
|
|
|
|
Permission is hereby granted, free of charge, to any person obtaining a copy
|
|
of this software and associated documentation files (the "Software"), to deal
|
|
in the Software without restriction, including without limitation the rights
|
|
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
|
|
copies of the Software, and to permit persons to whom the Software is
|
|
furnished to do so, subject to the following conditions:
|
|
|
|
The above copyright notice and this permission notice shall be included in
|
|
all copies or substantial portions of the Software.
|
|
|
|
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
|
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
|
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
|
|
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
|
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
|
|
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
|
|
THE SOFTWARE.
|
|
****************************************************************************/
|
|
|
|
#ifndef __SUPPORT_CGPOINTEXTENSION_H__
|
|
#define __SUPPORT_CGPOINTEXTENSION_H__
|
|
|
|
/**
|
|
@file
|
|
Point extensions based on Chipmunk's cpVect file.
|
|
These extensions work both with Point and cpVect.
|
|
|
|
The "ccp" prefix means: "CoCos2d Point"
|
|
|
|
Examples:
|
|
- ccpAdd( ccp(1,1), ccp(2,2) ); // preferred cocos2d way
|
|
- ccpAdd( CCPointMake(1,1), CCPointMake(2,2) ); // also ok but more verbose
|
|
|
|
- cpvadd( cpv(1,1), cpv(2,2) ); // way of the chipmunk
|
|
- ccpAdd( cpv(1,1), cpv(2,2) ); // mixing chipmunk and cocos2d (avoid)
|
|
- cpvadd( CCPointMake(1,1), CCPointMake(2,2) ); // mixing chipmunk and CG (avoid)
|
|
*/
|
|
|
|
#include "cocoa/CCGeometry.h"
|
|
#include <math.h>
|
|
|
|
NS_CC_BEGIN
|
|
|
|
/**
|
|
* @addtogroup data_structures
|
|
* @{
|
|
*/
|
|
|
|
/** Helper macro that creates a Point
|
|
@return Point
|
|
@since v0.7.2
|
|
*/
|
|
#define ccp(__X__,__Y__) cocos2d::CCPointMake((float)(__X__), (float)(__Y__))
|
|
|
|
/** Returns opposite of point.
|
|
@return Point
|
|
@since v0.7.2
|
|
*/
|
|
static inline Point
|
|
ccpNeg(const Point& v)
|
|
{
|
|
return -v;
|
|
}
|
|
|
|
/** Calculates sum of two points.
|
|
@return Point
|
|
@since v0.7.2
|
|
*/
|
|
static inline Point
|
|
ccpAdd(const Point& v1, const Point& v2)
|
|
{
|
|
return v1 + v2;
|
|
}
|
|
|
|
/** Calculates difference of two points.
|
|
@return Point
|
|
@since v0.7.2
|
|
*/
|
|
static inline Point
|
|
ccpSub(const Point& v1, const Point& v2)
|
|
{
|
|
return v1 - v2;
|
|
}
|
|
|
|
/** Returns point multiplied by given factor.
|
|
@return Point
|
|
@since v0.7.2
|
|
*/
|
|
static inline Point
|
|
ccpMult(const Point& v, const float s)
|
|
{
|
|
return v * s;
|
|
}
|
|
|
|
/** Calculates midpoint between two points.
|
|
@return Point
|
|
@since v0.7.2
|
|
*/
|
|
static inline Point
|
|
ccpMidpoint(const Point& v1, const Point& v2)
|
|
{
|
|
return (v1 + v2) / 2.f;
|
|
}
|
|
|
|
/** Calculates dot product of two points.
|
|
@return float
|
|
@since v0.7.2
|
|
*/
|
|
static inline float
|
|
ccpDot(const Point& v1, const Point& v2)
|
|
{
|
|
return v1.dot(v2);
|
|
}
|
|
|
|
/** Calculates cross product of two points.
|
|
@return float
|
|
@since v0.7.2
|
|
*/
|
|
static inline float
|
|
ccpCross(const Point& v1, const Point& v2)
|
|
{
|
|
return v1.cross(v2);
|
|
}
|
|
|
|
/** Calculates perpendicular of v, rotated 90 degrees counter-clockwise -- cross(v, perp(v)) >= 0
|
|
@return Point
|
|
@since v0.7.2
|
|
*/
|
|
static inline Point
|
|
ccpPerp(const Point& v)
|
|
{
|
|
return v.getPerp();
|
|
}
|
|
|
|
/** Calculates perpendicular of v, rotated 90 degrees clockwise -- cross(v, rperp(v)) <= 0
|
|
@return Point
|
|
@since v0.7.2
|
|
*/
|
|
static inline Point
|
|
ccpRPerp(const Point& v)
|
|
{
|
|
return v.getRPerp();
|
|
}
|
|
|
|
/** Calculates the projection of v1 over v2.
|
|
@return Point
|
|
@since v0.7.2
|
|
*/
|
|
static inline Point
|
|
ccpProject(const Point& v1, const Point& v2)
|
|
{
|
|
return v1.project(v2);
|
|
}
|
|
|
|
/** Rotates two points.
|
|
@return Point
|
|
@since v0.7.2
|
|
*/
|
|
static inline Point
|
|
ccpRotate(const Point& v1, const Point& v2)
|
|
{
|
|
return v1.rotate(v2);
|
|
}
|
|
|
|
/** Unrotates two points.
|
|
@return Point
|
|
@since v0.7.2
|
|
*/
|
|
static inline Point
|
|
ccpUnrotate(const Point& v1, const Point& v2)
|
|
{
|
|
return v1.unrotate(v2);
|
|
}
|
|
|
|
/** Calculates the square length of a Point (not calling sqrt() )
|
|
@return float
|
|
@since v0.7.2
|
|
*/
|
|
static inline float
|
|
ccpLengthSQ(const Point& v)
|
|
{
|
|
return v.getLengthSq();
|
|
}
|
|
|
|
|
|
/** Calculates the square distance between two points (not calling sqrt() )
|
|
@return float
|
|
@since v1.1
|
|
*/
|
|
static inline float
|
|
ccpDistanceSQ(const Point p1, const Point p2)
|
|
{
|
|
return (p1 - p2).getLengthSq();
|
|
}
|
|
|
|
|
|
/** Calculates distance between point an origin
|
|
@return float
|
|
@since v0.7.2
|
|
*/
|
|
float CC_DLL ccpLength(const Point& v);
|
|
|
|
/** Calculates the distance between two points
|
|
@return float
|
|
@since v0.7.2
|
|
*/
|
|
float CC_DLL ccpDistance(const Point& v1, const Point& v2);
|
|
|
|
/** Returns point multiplied to a length of 1.
|
|
@return Point
|
|
@since v0.7.2
|
|
*/
|
|
Point CC_DLL ccpNormalize(const Point& v);
|
|
|
|
/** Converts radians to a normalized vector.
|
|
@return Point
|
|
@since v0.7.2
|
|
*/
|
|
Point CC_DLL ccpForAngle(const float a);
|
|
|
|
/** Converts a vector to radians.
|
|
@return float
|
|
@since v0.7.2
|
|
*/
|
|
float CC_DLL ccpToAngle(const Point& v);
|
|
|
|
|
|
/** Clamp a value between from and to.
|
|
@since v0.99.1
|
|
*/
|
|
float CC_DLL clampf(float value, float min_inclusive, float max_inclusive);
|
|
|
|
/** Clamp a point between from and to.
|
|
@since v0.99.1
|
|
*/
|
|
Point CC_DLL ccpClamp(const Point& p, const Point& from, const Point& to);
|
|
|
|
/** Quickly convert Size to a Point
|
|
@since v0.99.1
|
|
*/
|
|
Point CC_DLL ccpFromSize(const Size& s);
|
|
|
|
/** Run a math operation function on each point component
|
|
* absf, fllorf, ceilf, roundf
|
|
* any function that has the signature: float func(float);
|
|
* For example: let's try to take the floor of x,y
|
|
* ccpCompOp(p,floorf);
|
|
@since v0.99.1
|
|
*/
|
|
Point CC_DLL ccpCompOp(const Point& p, float (*opFunc)(float));
|
|
|
|
/** Linear Interpolation between two points a and b
|
|
@returns
|
|
alpha == 0 ? a
|
|
alpha == 1 ? b
|
|
otherwise a value between a..b
|
|
@since v0.99.1
|
|
*/
|
|
Point CC_DLL ccpLerp(const Point& a, const Point& b, float alpha);
|
|
|
|
|
|
/** @returns if points have fuzzy equality which means equal with some degree of variance.
|
|
@since v0.99.1
|
|
*/
|
|
bool CC_DLL ccpFuzzyEqual(const Point& a, const Point& b, float variance);
|
|
|
|
|
|
/** Multiplies a and b components, a.x*b.x, a.y*b.y
|
|
@returns a component-wise multiplication
|
|
@since v0.99.1
|
|
*/
|
|
Point CC_DLL ccpCompMult(const Point& a, const Point& b);
|
|
|
|
/** @returns the signed angle in radians between two vector directions
|
|
@since v0.99.1
|
|
*/
|
|
float CC_DLL ccpAngleSigned(const Point& a, const Point& b);
|
|
|
|
/** @returns the angle in radians between two vector directions
|
|
@since v0.99.1
|
|
*/
|
|
float CC_DLL ccpAngle(const Point& a, const Point& b);
|
|
|
|
/** Rotates a point counter clockwise by the angle around a pivot
|
|
@param v is the point to rotate
|
|
@param pivot is the pivot, naturally
|
|
@param angle is the angle of rotation cw in radians
|
|
@returns the rotated point
|
|
@since v0.99.1
|
|
*/
|
|
Point CC_DLL ccpRotateByAngle(const Point& v, const Point& pivot, float angle);
|
|
|
|
/** A general line-line intersection test
|
|
@param p1
|
|
is the startpoint for the first line P1 = (p1 - p2)
|
|
@param p2
|
|
is the endpoint for the first line P1 = (p1 - p2)
|
|
@param p3
|
|
is the startpoint for the second line P2 = (p3 - p4)
|
|
@param p4
|
|
is the endpoint for the second line P2 = (p3 - p4)
|
|
@param s
|
|
is the range for a hitpoint in P1 (pa = p1 + s*(p2 - p1))
|
|
@param t
|
|
is the range for a hitpoint in P3 (pa = p2 + t*(p4 - p3))
|
|
@return bool
|
|
indicating successful intersection of a line
|
|
note that to truly test intersection for segments we have to make
|
|
sure that s & t lie within [0..1] and for rays, make sure s & t > 0
|
|
the hit point is p3 + t * (p4 - p3);
|
|
the hit point also is p1 + s * (p2 - p1);
|
|
@since v0.99.1
|
|
*/
|
|
bool CC_DLL ccpLineIntersect(const Point& p1, const Point& p2,
|
|
const Point& p3, const Point& p4,
|
|
float *s, float *t);
|
|
|
|
/*
|
|
ccpSegmentIntersect returns YES if Segment A-B intersects with segment C-D
|
|
@since v1.0.0
|
|
*/
|
|
bool CC_DLL ccpSegmentIntersect(const Point& A, const Point& B, const Point& C, const Point& D);
|
|
|
|
/*
|
|
ccpIntersectPoint returns the intersection point of line A-B, C-D
|
|
@since v1.0.0
|
|
*/
|
|
Point CC_DLL ccpIntersectPoint(const Point& A, const Point& B, const Point& C, const Point& D);
|
|
|
|
// end of data_structures group
|
|
/// @}
|
|
|
|
NS_CC_END
|
|
|
|
#endif // __SUPPORT_CGPOINTEXTENSION_H__
|
|
|