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Knifing a sphere causes a crash?

by Donald Teal · in Constructor · 04/11/2007 (7:46 am) · 3 replies

I created a sphere which I wanted to cut in half. So I took the knife tool and made my cut. Constructor crashed. I repeated this multiple times.

I can use the slice tool on the sphere with no crashes but not the knife

#1
04/11/2007 (7:54 am)
I found the best way so far was to:
1.) create your sphere the size you want the dome to be. Note: be careful on how many sides and segments you use for the sphere. If it crashes set them to a lower value.
2.) use the hollow brush, set wall thickness to 0.8 or higher.
3.) create a cube large enough to cover the bottom half of the sphere and use CSG Subtract, then delete cube.
You now have a dome that will go into the engine. I noticed several times though that if you set the wall thickness lower than 0.8 you will have some faces missing, the wall thickness defaults at 0.5.
#2
04/11/2007 (9:00 am)
Good advice about the wall thickness.

I can create half spheres, just was strange that constructor would crash on using the knife tool yet let me do the slice tool just fine.
#3
04/11/2007 (11:06 am)
It does seem that the knife tool crashes on spheres - but only when trying to cut them in half along their center. Slice and Clip tools seem unaffected. Most strange, I'll point it out to Matt.