How to draw a curve on a sphere

[lishaobobo]

How to draw a curve on a sphere，thank you！

[makc]

Shouldn't you be able to draw a curve on anything by copy-pasting from this?

[lishaobobo]

@makc now I know the beginning and the end and radius，but I can't control the direction of meshLine

[spite]

You have to build the array of vertices that define your curve. You can google how to create arcs: you need to turn your start and end points into spherical coordinates, and interpolate from one to the other, turning each interpolated point back to cartesian and add it to the MeshLine vertex array,

[lishaobobo]

@spite I've already solved it. Thank you！

[spite]

Great to know! How did you end up doing it?

[lishaobobo]

@spite As you say, first know the starting point, then use the ball coordinates, the most important time line radian