Acces Hatch Angle and origins (vb.net)

[AdriDicri]

Hello everyone !

(First thing, my english is bad, french is my mother tongue)

I'm a vb.net developer and i've a project to do for my job (my compagny is building laser machines)

So i have to use autocad for drawing and, inside autocad, add a vb.net project to transfer all coordinates to a laser.

There's no problem for the most of object, but i've some difficulties with the hatch.

I explain.

I can get the coordinates for hatching with the " . explose " (it gave me lines and after that, i can have all the points x and y)

But i need to "Rotate the hatch" (for making some sorts of holes in metal by example)

(Ex : Hatch angle start at 0 degrees, then 45, then 90, etc... etc...)

How can i rotate this hatch in vb.net ? (The hatch must not change on the autocad screen, so i use a clone for getting lines)

I've find a method for getting the pattern angle (ex : MyHatch.patternAngle) but it returns me strange angle (like 0,00812 etc...)

And a other problem is that the origins of hatch angle seems based on 0,0 (so, when i change angle, it change from 0,0 and not the center of the Hatch)

Can someone help me with this?

(Once again, sorry for  my bad english)

Thanks a lot !

[Alfred.NESWADBA · Accepted solution]

Hi,

>> but it returns me strange angle

internally in AutoCAD angles are measured based on Math.PI, so you don't put in 90 for a square-angle but Math.PI/2.0 (which gives 1.57 ==> and so the angle-values looks quite small.

>> And a other problem is that the origins of hatch angle seems based on 0,0

Do not get confused with that "origin", there is a difference between "rotate an object" (there the rotation-base is important) and the "hatch-rotation" where the hatch-basepoint is not as important because the hatch-lines duplicates themselves to be visible within the hatch-boundary. Modifying the hatch-angle does NOT rotate the complete object (hatch and boundary) around the base-point!

HTH, - alfred -

[AdriDicri]

Great ! Tanks for your help, it works perfectly