how to set a projection for Arc in 3D

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Hi friends,
I have a arc start point, end point, center point. I am unable to set the projection for arc.
Please reply any clue to find arc projection.

Posted 10-Feb-14 1:48am

vvino2020

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Kornfeld Eliyahu Peter 10-Feb-14 10:02am

Show your code, please...

lukeer 5-Mar-14 5:09am

What exactly do you mean by "projection"?
You have 3 points. Do you need to transfer them to another coordinate system (that one of the observer, camera, screen, whatever you want to call it)?
Do you need to process the actual pixels that make the arc up?

Please Improve your question[^].

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bkyee · Answer 1 · 2014-03-04T22:25:00

Solution 1

Here is the step to get the arc with 3 points in 3D.
1) First, find a plane with all 3 points on it.
2) Then, find the center of circle on this plane based on these 3 points.
3) With known center, find the starting and ending points out of these 3 points.
4) Connect the starting point and ending points, based on the center of circle.

Posted 4-Mar-14 22:25pm

bkyee

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lukeer 5-Mar-14 5:03am

Erm, ..., OP already knows 2) and 3). Question sounds like it's all about how to do 4).