(2022-07-26, 23:03)Travis Cobbs Wrote: The X, Y, and Z values in the dialog are not a matrix row. They are the coordinates of one endpoint of line segment representing a vector. (The other endpoint is implicitly 0,0,0.) The direction the vector points defines the axis of rotation, and the rotation angle defines the magnitude of the rotation. Note that the only thing that matters for this vector is the direction it points, not its own magnitude. So, 1,0,0 and 2,0,0 would produce the same results for a given angle, since both are aligned with the X axis.
Well shoot, I always though matrix rows were vectors. But I'd never really thought in terms of coordinates before. (This is always my problem with this stuff: I learn specific concepts for specific tasks, but I'm always missing the important bits in the middle.)
So this means, to find the values for this dialog, I could simply select the first helper part and set the grid relative to it. Then, the coordinates of the second helper part would give me the XYZ values I need to rotate around a vector connecting them.
I think.