STOR211beta first created
05/12/08 - last modified
05/12/08 Page Author: Ty HarnessWork in Progress - please refresh page by pressing F5 for latest info.
Important bug fix - please uninstall STOR21beta and replace with STOR211beta
Compound rotation about the x axis, y axis and z axis by entering angles for the circle end
Nudge control - experimental
STOR211beta fixes a problem with the Inclined circle square off central axis feature with STOR21beta.
STOR21beta produced a deformed circular end. I've performed 8 tests using a known circular pipe connection
to check whether circular end is being deformed when rotated.
Figure 1 - Test 1
Tests 1-4 are performed with the Square Off central axis check box checked.
Test 5 inclines the circular end about it's own X axis by -20 deg.
Test 6 inclines the circular end about it's own Y axis by 20 deg.
Test 7 is the compound angle formed by rotating X 20 deg and Y 20 deg.
Test 8 repeat of test 3 with more triangulations.
Inclined circle end with a compounded circle end
To fully describe a compound angle we need 3 rotations to position the circle end
in any orientation.
The way my algorithm works lends itself to this convention:
RY, RX and then RZ (YXZ convention where the transformation matrix can be found at
it's not easy to measure angles at the best of times and I'm still not happy that 3 rotations
is the best entry method for sheet metal workers who'd go on site and (say) measure 3 plumb verticals and
offsets from a datum point to describe the circle end.
Figure 3- Sample picture description here
Figure 4 - Compound YXZ angle : 20,20,20
RZ vs. Nudging
Write some on the pros and cons of nudging to make well conditioned patterns.
More information on nudging can be found: