Transform sketch entities

graham_lock

Hi,

I've been unsuccessful in finding an example of transforming sketch entities.

In my use case I need to rotate a rectangle about its centre.

So far I have:

skRectangle(sketchStartFormer, "rectangleStartFormer", {
"firstCorner" : vector(centreStartXmm - (width / 2), centreStartYmm - (height / 2)),
"secondCorner" : vector(centreStartXmm + (width / 2), centreStartYmm + (height / 2))
});

const rotationMatrix = [[cos(startRotation), -sin(startRotation)], [sin(startRotation), cos(startRotation)]] as Matrix;

How do I apply this (if it's correct) to the rectangle and rotate it about its center?

Thank you.

Caden_Armstrong

You have a few different options,

- Calculate the four corners and create 4 line segments (this is how onshape does aligned rectangles, probably how I would do it in this case).

- Create rectangle, solve the sketch, and use opTransform to rotate it, just note that opTransform takes in a transform not a matrix.


- Create the rectangle and use sketch constraints to rotate it (personally my least favourite option)

Caden_Armstrong

You have a few different options,

- Calculate the four corners and create 4 line segments (this is how onshape does aligned rectangles, probably how I would do it in this case).

- Create rectangle, solve the sketch, and use opTransform to rotate it, just note that opTransform takes in a transform not a matrix.


- Create the rectangle and use sketch constraints to rotate it (personally my least favourite option)

graham_lock

Thank you