The cutting process was performed through subtraction boolean operation of the solid model of workpiece and cutter.
利用齿坯实体模型和刀具实体模型做布尔减运算，来实现模拟工件材料的去除过程；
The second algorithm, depending on setting the threshold controlling tool-axis vector and using solid based on Boolean-operation, realizes unsafe CL-points and Boolean-operation check.
后者通过设置刀轴矢量变化的阈值并采用集合碰撞体，实现了刀位的跳点检查和集合运算检查。
All obtained valid 3d solid elements are combined with Boolean operation, and the volumetric model of a tooth is then achieved at last.
把全部有效实体单元进行3维实体布尔运算，得到牙齿的实体模型。
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