I've been using some of the ideas here to try and produce a sphere for refracting light from an LED (focusing element). The idea is, given a known distance from the emitter, and a known height (both of which set the maximum capture angle) then constants on two rays of light will force the sphere rad...

Hi, I've produced a lens for a rear bicycle LED which uses "best guestimate" design. It needs to be validated before production. Can Freecad model such refraction? The lens in question has two refractive sections, the simpler is the triangle shown here. The LED and dimensions are all accur...

Hi, I have the following sketch (see attached) which is two circles and a rectangle in-between. When I apply this to an object to pocket it out the object goes black (fail). I assume this is because it can't work out how to cut out the intersections. Ideally I'd like it to be a single object but one...

Good call, stderr is: Running the Python command 'dd_circularDimension' failed: Traceback (most recent call last): File "/home/andrew/.FreeCAD/Mod/FreeCAD_drawing_dimensioning/circularDimension.py", line 87, in Activated V = getDrawingPageGUIVars() File "/home/andrew/.FreeCAD/Mod/Free...

Sorry I wasn't sure if it were the right place for it.

Using 0.16, the current official Fedora 26 package.

Hi, New Freecad user here! I've installed the Drawing Dimensions Plugin from github and am attempting to set one. I click for example the circle and get a line, I pull that and click again somewhere where it places a measurement text. I click a second time expecting it to "set" and it disa...