Drawing Semi-circles in wysiwyg

[Tekkie]

Hi guys,

 

Just wondering how you make a semi circle in wysiwyg, I can make an arc, I can make a line, how do I join them to make a semicircle "D".

 

What I am going for is: imagine a column (circular prism), then cut it in half lenghtways making a half circle prism.

 

Cheers

[david.elsbury]

What is the version number of WYG that you are running?

[Tekkie]

What is the version number of WYG that you are running?

 

Am running on r22

[gareth]

Sounds like you need to draw a semi-circular surface, then extrude that into a 3D entity. As for drawing the semicircle - how about drawing a 180-degree arc to use as a construction entity, split it into as many lines as you need, then snap to end-point as you draw around it to create a surface, joining the two very end points to create your semi-circular surface?

[Tekkie]

Thanks,

 

Took me a while but it worked, shame there isnt a way to do it without drawing guides then 'draw over' them.

 

Much appeciated

[gareth]

The CAD side of WYSIWYG is always an aspect of it that's been woefully lacking in some fairly standard functionality. The CAST excuse has always been that WYG is a visualisation program, not a CAD program - which is OK as far as it goes, I guess, but even so there's some fairly basic stuff that I can do easily with TurboCAD (which cost me tens of pounds) which entails a lot more "round the houses" fannying-about in WYG (which cost me hundreds in initial purchase, and even more hundreds in ongoing subscriptions until I gave up on it). Much of the time, if I need to draw anything more than a simple set outline or groundplan, I find it easier to do my 2D drawing in TurboCAD, export it as a DXF, import that into WYG, and then use that as a base for constructing a 3D version.

[the kid]

The other way to do it is create a cylinder, extrude in to 3D then create a riser that is the same size, in height and width and depth.

Then over lay the square to the cut point (use the square's edge as a marker).

 

Then right click on the bit you want to keep > tools > boolean operations > subtract. - click the object you want to subtract (in this case the riser) and press enter.

 

Should do it.