Couldnīt you use a cross product for this?:
sx1#=(a_x0#-a_x1#)
sy1#=(a_y0#-a_y1#)
sz1#=(a_z0#-a_z1#)
sx2#=(a_x0#-a_x2#)
sy2#=(a_y0#-a_y2#)
sz2#=(a_z0#-a_z2#)
;cross product, a vector perpendicular to both sx1, and sx2 vectors:
cx#=(sy1*sz2)-(sz1*sy2)
cy#=(sz1*sx2)-(sx1*sz2)
cz#=(sx1*sy2)-(sy1*sx2)
;normalize
clen#=sqr(cx*cx+cy*cy+cz*cz)
cx=cx/clen
cy=cy/clen
cz=cz/clen
;position sphere, at distance away:
d#=5
PositionEntity sphere, m_x+cx*d , m_y+cy*d , m_z+cz*d
Hope this helps, as I am not entirely sure of what you want to do.
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