How to use code to achieve the same effect like arx command "flatshot"

[27925916]

How to use code to achieve the same effect like arx command "flatshot",and in addition, the layer of the result lines is the same as before。  because the arx command "flatshot"will make the layer of result lines to "0",like the picture below 

[ynapeu]

You can use the AsdkHlrEngine class to do this.

If you have only one AcDb3dSolid you can use the projectOnToSolid method.

[27925916]

thanks，I'll give it a try

[27925916]

I create two region A and B, and A is above B, but why it doesn't work to use AsdkHlrEngine.  I want the result like picture 3

 picture 1

picture 2

result I want 

Picture 3