AutoCAD draws plane and space curves

We often encounter problems with drawing intersecting lines, intersecting lines, and other curves when drawing patterns. Hand drawing is very cumbersome, looking for special points and a certain number of general points, and the resulting curve error is large. Drawing a flat or spatial curve with AutoCAD is easy.

Method 1: Use the Pline command to draw a polyline on a 2D graph through a special point. After Fit or Spline curve fitting in the Pedit command, it can become a smooth plane curve. Use the 3Dpoly command to draw a polyline on a 3D graph through a special point. After fitting the Spline curve in the Pedit command, it can be turned into a smooth space curve.

Method 2: Use the Solids command to create three-dimensional basic entities (cuboid, cylinder, cone, sphere, etc.), and then Boolean (Boolean) combination operations: intersection, union, difference and interference to obtain a variety of complex entities, Then use the drop-down menu View /3D Viewpoint to select different viewpoints to generate a standard view, and get a different view projection of the curve.