rotating an object in 3d space

 From: wimverbe 20 Nov 2014  (1 of 5)
 hi, is it possible to rotate an object in 3d space, thus not only along a parallel of the X, Y or Z axis? I have a simple plane, and it needs to align its normal (the green line) with the yellow line. it is for mirror projections, so it has to be very accurate. now I have to rotate it first along the x axis, then the z, then x again and so on, but it never is spot on, always an aproxximation, since every rotation moves it away in the other axis a bit. always smaller deviation, but never perfect. it would be nice to use the perspective view, select the green line and with object snap on, have it snap to the yellow line. but this does not work. tnx wim Image Attachments:

 From: Michael Gibson 20 Nov 2014  (2 of 5)
 7053.2 In reply to 7053.1 Hi wim, you can use the Transform > Rotate > Rotate Axis rotation command to rotate around any arbitrary axis line in 3D space. At the start of that Rotate Axis command you will pick 2 points to define the rotation axis. For your case there you would want to get 2 points on a normal going perpendicular to both those lines. To do that you could either set your construction plane onto the base of those lines and then drag the x and y axes of the construction plane orientation picker onto those endpoints, or also a quick way to do it is to drag out 2 construction lines from the base point along each line, that will then make a "normal" straight snap line available for your desired direction. See here for an example of the quick construction line way: http://moi3d.com/forum/index.php?webtag=MOI&msg=4665.3 Basically 2 construction lines that come out from the same base point will form a temporary construction plane and you can snap along the normal of that plane , you want to use that to place the axis line for rotate axis. Then the next steps for rotate axis are to either enter in angle value or pick 2 reference points - you would want to pick 2 reference points, one on each of your line endpoints. - Michael