bsp_Differential bsp_Calculus.h float float bsp_Differential::dt dt bsp_Differential::dt 时间参数 bsp_Differential Differential bsp_Differential::bsp_Differential (float dt) bsp_Differential bsp_Differential::bsp_Differential float dt dt float float bsp_Differential::Differential (float var) Differential bsp_Differential::Differential float var 对数据微分 var 此处填入浮点数据 此时的微分值 dt 一个微分对象 bsp_Differentialbsp_Differential bsp_DifferentialDifferential bsp_Differentialdt