Need to Restrict block rotation through jigging in autocad c#

[Anonymous]

Hi,

I have Two Ploylines intersection at one point. At That intersection point i need place block and it should jig along with either one polyline or other polyline. I need to place parallel to one polyline or other. 

For more information please check attachment.

[norman.yuan]

Moving/rotating entity along a given path with a jig only requires a bit of math calculation in the custom implemented Sampler() method to correctly the entity's position/rotation at given mouse cursor position (likely obtained from JigPrompts.AcquirePoint()).

One of my blog articles posted quite a few years back might be of help:

https://drive-cad-with-code.blogspot.com/2012/03/moving-entity-along-curve.html