[Cst-1b] 99.6.4 Graphics

[Phebe Mann]

99/6/4
try on AutoCAD

1) Scale from 1 to 8 units (base radius 4 units in question) Scaling must
be (8, 8, 13)
2) rotate about x-axis +22.62
3) rotate about z-axis -36.87
4) translate by (-1, 3,7)

alternatives for 2) and 3)
2) rotate about y-axis -22.62
3) rotate about z-axis +53.13
or
2) rotate about y-axis -12.99
3) rotate about x-axis +18.43
These also work 

HTH

Phebe


On Sun, 28 May 2000, M.Y.W.Y.B. wrote:

> CST 99.6.4 Graphics
> 
> First Part (rotate the cone)
> 
> I'm not sure whether the values are correct. Could someone check against
> his/her values?
> 
> 1) Scale: 4*x, 4*y, 13*z
> 2) Rotate about y-axis by -13.33 degrees
> 3) Rotate about x-axis by 22.62 degrees
> 4) Translage: x -1, y +3, z +7
> 
> 
> 
> Last Part:
> Clearly the Sutherland algorithm doesn't work with concave clipping poly's.
> What to do?
> Break it into smaller, convex poly's?
> Any other ideas?
> 
> Cheers, 
> 
> Mo
> 
> 
> 
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