axmol/cocos2dx/cocoa/CCGeometry.cpp

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#include "CCGeometry.h"
#include "ccMacros.h"

// implementation of CCPoint
NS_CC_BEGIN

CCPoint::CCPoint(void) : x(0), y(0)
{
}

CCPoint::CCPoint(float x, float y) : x(x), y(y)
{
}

CCPoint::CCPoint(const CCPoint& other) : x(other.x), y(other.y)
{
}

CCPoint::CCPoint(const CCSize& size) : x(size.width), y(size.height)
{
}

CCPoint& CCPoint::operator= (const CCPoint& other)
{
    setPoint(other.x, other.y);
    return *this;
}

CCPoint& CCPoint::operator= (const CCSize& size)
{
    setPoint(size.width, size.height);
    return *this;
}

CCPoint CCPoint::operator+(const CCPoint& right) const
{
    return CCPoint(this->x + right.x, this->y + right.y);
}

CCPoint CCPoint::operator-(const CCPoint& right) const
{
    return CCPoint(this->x - right.x, this->y - right.y);
}

CCPoint CCPoint::operator-() const
{
	return CCPoint(-x, -y);
}

CCPoint CCPoint::operator*(float a) const
{
    return CCPoint(this->x * a, this->y * a);
}

CCPoint CCPoint::operator/(float a) const
{
	CCAssert(a, "CCPoint division by 0.");
    return CCPoint(this->x / a, this->y / a);
}

void CCPoint::setPoint(float x, float y)
{
    this->x = x;
    this->y = y;
}

bool CCPoint::equals(const CCPoint& target) const
{
    return (fabs(this->x - target.x) < FLT_EPSILON)
        && (fabs(this->y - target.y) < FLT_EPSILON);
}

bool CCPoint::fuzzyEquals(const CCPoint& b, float var) const
{
    if(x - var <= b.x && b.x <= x + var)
        if(y - var <= b.y && b.y <= y + var)
            return true;
    return false;
}

float CCPoint::getAngle(const CCPoint& other) const
{
    CCPoint a2 = normalize();
    CCPoint b2 = other.normalize();
    float angle = atan2f(a2.cross(b2), a2.dot(b2));
    if( fabs(angle) < FLT_EPSILON ) return 0.f;
    return angle;
}

CCPoint CCPoint::rotateByAngle(const CCPoint& pivot, float angle) const
{
    return pivot + (*this - pivot).rotate(CCPoint::forAngle(angle));
}

// implementation of CCSize

CCSize::CCSize(void) : width(0), height(0)
{
}

CCSize::CCSize(float width, float height) : width(width), height(height)
{
}

CCSize::CCSize(const CCSize& other) : width(other.width), height(other.height)
{
}

CCSize::CCSize(const CCPoint& point) : width(point.x), height(point.y)
{
}

CCSize& CCSize::operator= (const CCSize& other)
{
    setSize(other.width, other.height);
    return *this;
}

CCSize& CCSize::operator= (const CCPoint& point)
{
    setSize(point.x, point.y);
    return *this;
}

CCSize CCSize::operator+(const CCSize& right) const
{
    return CCSize(this->width + right.width, this->height + right.height);
}

CCSize CCSize::operator-(const CCSize& right) const
{
    return CCSize(this->width - right.width, this->height - right.height);
}

CCSize CCSize::operator*(float a) const
{
    return CCSize(this->width * a, this->height * a);
}

CCSize CCSize::operator/(float a) const
{
	CCAssert(a, "CCSize division by 0.");
    return CCSize(this->width / a, this->height / a);
}

void CCSize::setSize(float width, float height)
{
    this->width = width;
    this->height = height;
}

bool CCSize::equals(const CCSize& target) const
{
    return (fabs(this->width  - target.width)  < FLT_EPSILON)
        && (fabs(this->height - target.height) < FLT_EPSILON);
}

// implementation of CCRect

CCRect::CCRect(void)
{
    setRect(0.0f, 0.0f, 0.0f, 0.0f);
}

CCRect::CCRect(float x, float y, float width, float height)
{
    setRect(x, y, width, height);
}

CCRect::CCRect(const CCRect& other)
{
    setRect(other.origin.x, other.origin.y, other.size.width, other.size.height);
}

CCRect& CCRect::operator= (const CCRect& other)
{
    setRect(other.origin.x, other.origin.y, other.size.width, other.size.height);
    return *this;
}

void CCRect::setRect(float x, float y, float width, float height)
{
    // CGRect can support width<0 or height<0
    // CCAssert(width >= 0.0f && height >= 0.0f, "width and height of Rect must not less than 0.");

    origin.x = x;
    origin.y = y;

    size.width = width;
    size.height = height;
}

bool CCRect::equals(const CCRect& rect) const
{
    return (origin.equals(rect.origin) && 
            size.equals(rect.size));
}

float CCRect::getMaxX() const
{
    return (float)(origin.x + size.width);
}

float CCRect::getMidX() const
{
    return (float)(origin.x + size.width / 2.0);
}

float CCRect::getMinX() const
{
    return origin.x;
}

float CCRect::getMaxY() const
{
    return origin.y + size.height;
}

float CCRect::getMidY() const
{
    return (float)(origin.y + size.height / 2.0);
}

float CCRect::getMinY() const
{
    return origin.y;
}

bool CCRect::containsPoint(const CCPoint& point) const
{
    bool bRet = false;

    if (point.x >= getMinX() && point.x <= getMaxX()
        && point.y >= getMinY() && point.y <= getMaxY())
    {
        bRet = true;
    }

    return bRet;
}

bool CCRect::intersectsRect(const CCRect& rect) const
{
    return !(     getMaxX() < rect.getMinX() ||
             rect.getMaxX() <      getMinX() ||
                  getMaxY() < rect.getMinY() ||
             rect.getMaxY() <      getMinY());
}

NS_CC_END