openscad - 为什么差分功能不起作用（openSCAD）？

Question

我尝试学习如何使用 openSCAD。我正在阅读（也在观看）很多教程，但我不明白为什么以下代码不起作用。请你帮助我好吗？

difference() {

     polygon(
             points=[[2,0],[1.6,2.6],[2.2,3.4],[5.6,4],[11.4,3.4],[11.4,0.6],[10,-1.6],[7.6,-2.4],[4.4,-1.8]]);

     polygon(// right len holder in

             points=[[2.4,0],[2,2.6],[2.5,3.1],[5.6,3.6],[11,3],[11,0.6],[9.8,-1.2],[7.6,-2],[4.4,-1.45]]);}

Answer 1

您的顶级对象是 2D 对象，使用 linear_extrude 获取 3D 对象：

h = 10;
difference() {
    linear_extrude(height=h) polygon(
         points=[[2,0],[1.6,2.6],[2.2,3.4],[5.6,4],[11.4,3.4],[11.4,0.6],[10,-1.6],[7.6,-2.4],[4.4,-1.8]]);

     linear_extrude(height=h) polygon(// right len holder in

         points=[[2.4,0],[2,2.6],[2.5,3.1],[5.6,3.6],[11,3],[11,0.6],[9.8,-1.2],[7.6,-2],[4.4,-1.45]]);

}