How to design a circle in the 3-D space?
For a circle in the 2-D space, two members are enough.
1 center;
2 radius;
but in 3D, how can I define the direction and the position of the circle?
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How to design a circle in the 3-D space?
For a circle in the 2-D space, two members are enough.
1 center;
2 radius;
but in 3D, how can I define the direction and the position of the circle?
One possibility would be to include a vector that’s normal to the plane on which the circle lies. This has the advantage that if you ever decide to render the circle, the normal will be used to determine things like reflections off the surface defined by that circle.