Not sure how to phrase it in ZB but I am looking for a way to convert “global” to “local” coordinates and vice versa. I guess in ZB it would be “object” coordinates (as in preview window) to “canvas” coordinates (as on canvas). Has anyone figured out how to do this?
Also, any way to control the rotation axis with more precision?
Thanks for any input
Hi Bism
I think I can help you in regards to placing zspheres based upon canvas coordinates. My zsphere scripts are based on this
rough algorithm off the top of my head since I don’t have code with me at work.
in zscript code
create root zsphere at center of canvas x = 320 y = 240
Size the Zsphere to 100x100x100 using transformset (object cords are based upon unity factor of 1)
[Transformset,320,240,0,100,100,100,0,0,0]
Root global loc: gx=320 gy=240 gz=0
Object cords of root are always ox=0 oy=0 oz=0
example, you wish to connect a new Zsphere node to the root at canvas cordinates of gx1=420 gy1=340 gz1=0
the xyz location of the zsphere should be
to get the offset from the root sphere do this
nx = (gx1-gx).01 for example (420-320).01
ny = (gy1-gy).01 for example (340-240).01
nz = (gz1-gz) *.01 for example (0-0) *.01
Hope this helps and I have explained it in a legible manner
Digits,
Great!..The “aha” moment came with using transformset. My way was a little… goofy in comparison. Thanks.
Now, what the heck is going on with rotation? Seems I flip over when getting towards 90 or 180. Is this true? Have I been staying up too late? What is happening?
Anyway, thanks again. Hopefully scripts with a purpose will be coming soon…
What you have discovered is Gimbal Lock, here is a thread where this has been discussed
I’ve tried a number of ways to overcome this but my brain ain’t big enough 
Thanks for the link. Looks like Euler angles and quaternions are on todays reading menu…