how to assign a variable to control number of sides of a polygon?

dhiraj_patil · August 2021

I want to assign a variable to control number of sides of a polygon. But it won't accept the input.

Image: https://us.v-cdn.net/5022071/uploads/editor/bf/0x2n7oyxbtlq.jpg

Alex_Kempen · August 2021

Sketch patterns and polygons cannot unfortunately be controlled with variables. This is due to the way Onshape handles creating new sketch entities internally; new entities aren’t processed deterministically, so increasing the number of sides on a polygon and then changing it back will cause things which reference the sides of the polygon to behave unexpectedly and inconsistently.

One alternative to configuring polygons directly is to make multiple polygon sketches and to use configurations to switch between them.

Also, note that variables are called in Onshape using a # - this also activates the variable autocomplete menu.

Evan_Reese · August 2021

This limitation bugs me semi-frequently, and if the Onshape team finds a way to make it work in the background, that would be great. Until then, I'll get around it like this. Start by making a surface that's a single section of the poligon, using the circular pattern feature to make the whole shape, and extruding the face (or lofting or whatever). Here's an example.

Image: https://us.v-cdn.net/5022071/uploads/editor/bt/udllnii49oe0.gif

Alex_Kempen · August 2021

Sketch patterns and polygons cannot unfortunately be controlled with variables. This is due to the way Onshape handles creating new sketch entities internally; new entities aren’t processed deterministically, so increasing the number of sides on a polygon and then changing it back will cause things which reference the sides of the polygon to behave unexpectedly and inconsistently.

One alternative to configuring polygons directly is to make multiple polygon sketches and to use configurations to switch between them.

Also, note that variables are called in Onshape using a # - this also activates the variable autocomplete menu.

Evan_Reese · August 2021

This limitation bugs me semi-frequently, and if the Onshape team finds a way to make it work in the background, that would be great. Until then, I'll get around it like this. Start by making a surface that's a single section of the poligon, using the circular pattern feature to make the whole shape, and extruding the face (or lofting or whatever). Here's an example.

how to assign a variable to control number of sides of a polygon?

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