RedCore/cocos2d/cocos/editor-support/cocostudio/CCUtilMath.cpp

/****************************************************************************
Copyright (c) 2013-2017 Chukong Technologies Inc.

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#include "editor-support/cocostudio/CCUtilMath.h"

using namespace cocos2d;


namespace cocostudio {

bool isSpriteContainPoint(Sprite *sprite, Vec2 point, Vec2 &outPoint)
{
    outPoint = sprite->convertToNodeSpace(point);

    Size s  = sprite->getContentSize();
    Rect r(0, 0, s.width, s.height);

    return r.containsPoint(outPoint);
}

bool isSpriteContainPoint(Sprite *sprite, Vec2 point)
{
    Vec2 p;
    return isSpriteContainPoint(sprite, point, p);
}


Vec2 bezierTo(float t, Vec2 &point1, Vec2 &point2, Vec2 &point3)
{

    Vec2 p;

    p.x = pow((1 - t), 2) * point1.x + 2 * t * (1 - t) * point2.x + pow(t, 2) * point3.x;
    p.y = pow((1 - t), 2) * point1.y + 2 * t * (1 - t) * point2.y + pow(t, 2) * point3.y;

    return p;
}

Vec2 bezierTo(float t, Vec2 &point1, Vec2 &point2, Vec2 &point3, Vec2 &point4)
{
    Vec2 p;

    p.x = point1.x * pow((1 - t), 3) + 3 * t * point2.x * pow((1 - t), 2) + 3 * point3.x * pow(t, 2) * (1 - t) + point4.x * pow(t, 3);
    p.y = point1.y * pow((1 - t), 3) + 3 * t * point2.y * pow((1 - t), 2) + 3 * point3.y * pow(t, 2) * (1 - t) + point4.y * pow(t, 3);

    return p;
}

Vec2 circleTo(float t, Vec2 &center, float radius, float fromRadian, float radianDif)
{
    Vec2 p;

    p.x = center.x + radius * cos(fromRadian + radianDif * t);
    p.y = center.y + radius * sin(fromRadian + radianDif * t);

    return p;
}

}