#1
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question about yaw, pitch, roll
Hello
I have a question about the command <viewpoint>.rotate(x,y,z,angle). It's said x specifies yaw, y specifies pitch, and z specifies roll. Also viz.get(viz.HEAD_EULER) returns the same order. my code is: view = viz.get(viz.MAIN_VIEWPOINT) view.rotate(1,0,0, 90) pe = viz.get(viz.HEAD_EULER) print 'orientation of viewpoint is at: ', pe[0], ', ', pe[1], ', ', pe[2] It's supposed to change orientation in yaw (vertical axis), and get result (90.0, 0.0, 0.0). But my result is (0.0, 90.0, 0.0). Then I tried other two directions: If: view.rotate(0,1,0, 90) then result is: (90.0, 0.0, 0.0) If: view.rotate(0,0,1 90) then result is: (0.0, 0.0, 90.0) It seems the yaw and pitch values somehow switch each other. Only roll value is what I expected. Can anybody tell me what happened? Thanks a lot. |
#2
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Those values are correct. The command view.rotate(1,0,0, 90) will rotate the view 90 degrees along the x-axis, which represents the pitch in euler angles.
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#3
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That's always bothered me too. Yaw is rotation about the y axis.
If you do it this way: view.rotate(1,0,0,90) the Eulers come back 0,90,0 but if you do it this way: view.rotate(90,0,0) the Eulers are 90,0,0 |
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