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Re: Determining X and Y for the intersection of a conic section and rotated plane given Y

T
Terrypin
Thu, Jun 17, 2021 6:52 PM
<http://forum.openscad.org/file/t3184/ConeProject-1.jpg> Or https://www.dropbox.com/s/5w3ybt5gmscpvw8/ConeProject-1.jpg?dl=0httraw=1 <https://www.dropbox.com/s/5w3ybt5gmscpvw8/ConeProject-1.jpg?dl=0httraw=1> -- Sent from: http://forum.openscad.org/
WF
William F. Adams
Thu, Jun 17, 2021 7:51 PM

Drawing the lines first isn't an option --- I need to match a differently cut part and need to get from the left (the tip of the cone) to the right (the ellipse where the cone and plane intersect at X and Z based on knowing Y (I'll be looping through).
I've tried doing it w/ trigonometry, and it's a long series of nested calculations which seem cumbersome and slow to calculate even before I get halfway there. 
William

Drawing the lines first isn't an option --- I need to match a differently cut part and need to get from the left (the tip of the cone) to the right (the ellipse where the cone and plane intersect at X and Z based on knowing Y (I'll be looping through). I've tried doing it w/ trigonometry, and it's a long series of nested calculations which seem cumbersome and slow to calculate even before I get halfway there.  William