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Re^5: (OT) moving points from one plane to another

by assemble (Friar)
on Jul 09, 2009 at 15:34 UTC ( #778607=note: print w/ replies, xml ) Need Help??


in reply to Re^4: (OT) moving points from one plane to another
in thread (OT) moving points from one plane to another

No!

The angle between the normals is the angle between the two planes, but you don't get angles out of a dot product!

If θ is the angle between the planes: θ = cos-1((n1.n2)/(|n1||n2|))

This formula is based on one of the definitions of the dot product, which states: n1.n2=|n1||n2|cos(θ)


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