| Poster | : oldmasterchu | | Posts | : 1 | | Country | : Hong Kong | | City | : Hong Kong |
| | | | Posted by oldmasterchu on 29/04/2010 at 14:48:43
| | Hello Riemers,
LaughingJack is right. So does the X and Z rotation matrics.
The calculation in the example shows the coordinate rotate 45 degree counter clockwise around Z axis, not the point (10,5,0).
If you rotate the point (10,5,0) 45 degree CCW around Z axis, the rotated point is still in the first quadrant of the XY plane. Its y-value can't be negative. | |
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