Showing intersect path correctly in 3D Graphics
I created an applet which helps students learn the shape of the cross section by a plane and cylinder several days ago. However, I find a problem that doesn't match reality. Here is the capture image showing the problem
The orange region is the cross section showing by geogebra. I know that if the plane can be extend infinitely, indeed the orange region fits the result showing by geogebra. But I just want to show the region with ticks without region marked red pen, how can I do that? (The reason why I want to do this is that the plane is restricted in blue square).