/****************************************************************************
Copyright (c) 2010 cocos2d-x.org

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
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
THE SOFTWARE.
****************************************************************************/

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

// implementation of Point
NS_CC_BEGIN

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

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

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

Point::Point(const Size& size) : x(size.width), y(size.height)
{
}

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

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

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

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

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

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

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

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

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

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

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

// implementation of Size

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

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

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

Size::Size(const Point& point) : width(point.x), height(point.y)
{
}

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

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

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

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

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

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

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

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

// implementation of Rect

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

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

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

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

void Rect::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 Rect::equals(const Rect& rect) const
{
    return (origin.equals(rect.origin) && 
            size.equals(rect.size));
}

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

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

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

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

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

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

bool Rect::containsPoint(const Point& point) const
{
    bool bRet = false;

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

    return bRet;
}

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

NS_CC_END