Tool path curve generation method and tool path curve generation apparatus

A tool path curve generation method is provided for generating a curve from a tool path designated by a command point sequence. The method includes: a step of defining a region based on a polygonal line path connecting the command point sequence; a step of determining whether the curve is included in the region on the basis of the geometric shape of the surface of the region; and a step of generating a curve that has been determined to be included in the region in the determination step. 本发明提供种工具路径曲线化方法，从指令点序列所指令的工具路径生成曲线，其包括：定义以连接上述指令点序列的折线路径为基准的区域的步骤；基于该区域的表面的几何学形状判定上述曲线是否包含于该区域内的步骤；以及，生成根据上述判定步骤判定为包含于上述区域的曲线的步骤。