extension factor meaning in English

扩大因子
伸展因素

In addition , we often encounter a general problem - it is very difficult to describe a complex shape with a single bezier curve precise . method of bezier definites shape of curve , which is global project . if you locally modify curve , it is necessary to affact the global . it is that method of bezier has character of global control , but it has not charater of local control . by way of arbitrary partition . arbitrary degree elevation , that may increases control point . increases potential active character of controling curve . therefore , the thesis discusses mainly the problem of local free - form deformation , which may make bezier curve deform continuely and gain wanted figures . however , no matter what free - form deformation based on extension factor for parametric curve or arbitrary partition will reduce smoothness of parametric curve
另外，我们经常会遇到一个普遍问题，就是难以用单一的贝齐尔曲线段描述复杂的形状。贝齐尔方法对形状的定义是整体方案，欲对其作局部修改，必然会影响到整体，即贝齐尔方法是有整体控制性质，但却缺乏局部控制性质。通过任意分割和任意升阶得出所要变形的一段，以及增加控制点，增加对曲线进行控制的潜在灵活性。