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Rotation axis
Author
I have a small app which loads an obj model, When I rotate the model it moves about point far away from it, I can`t seem to figure out how to get the model to spin around a specific point i.e in the center of the model.
If you are doing translations to move your view farther away from the object, make sure that you do the translations and then the rotations (not vice versa). You also might want to see how the vertices for the object are defined, if they are all defined far away from an origin of (0,0,0) in the same direction (like all positive z positions, or all negative z positions) then that could be the problem and you might want to fix the object. Hope that helps.
Morgan
Morgan
1) the object was centered in 0,0,0 (ie. a box was vertices -20,-20,-20 and 20,20,20). This center is the point of rotation.
2) First rotate, then translate. If you use matrix multiply, it is very important!!.
-eng3d-
2) First rotate, then translate. If you use matrix multiply, it is very important!!.
-eng3d-
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