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相关代码:

// http://wenku.baidu.com/view/7c6f4a000740be1e650e9a75.html// 帐篷映射class TentEquation : public DiscreteEquation{public:    TentEquation()    {        m_StartX = 0.0f;        m_StartY = 0.36f;        m_ParamA = 0.99f;    }    void IterateValue(float x, float y, float& outX, float& outY) const    {        outX = x+0.00025f;        outY = m_ParamA - (1 + m_ParamA)*fabsf(y);    }    bool IsValidParamA() const {
   return true;}};

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