Bug Fix
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.
 
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| 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
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| Figure 2 - Compound angle YXZ angle : 20,20,0 - Test 7 screen shot |
More on compound orientation of the 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 at http://en.wikipedia.org/wiki/Euler_angles
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.
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| Figure 3- Sample picture description here |
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| 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: here.
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