hi,
rotation doesn't affect translational components only if the object is
placed in the origin of the coordinate system. If you place your
viewplatform at (1,0,1) and perform a rotation (pi) around the y-axis, the
new location will be at (-1,0,-1). orientation and locations have changed.
if you want to rotate an object in place, you first have to perform a
coordinate transformation.
Gernot
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Vladimir Olenin
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Sent by: Discussion Subject: Re: [JAVA3D] Coordinate
Transform
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30.11.99 07:48
Please respond to
Vladimir Olenin
If all u do is Rotation only, then no translation components of
Transform3D matrix are changed. So, u can easily use
transform3D.get(vector3d) or transform3D.get(vector3f) functions in
order to get the position (but it wouldn't change anyway).
vladimir
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In your previous letter u wrote:
--------------------------------
CY> Could any one help me figure out this problem? When I move the
viewpoint
CY> by rotation, I have 3*3 matrix after rotation and 4*4 matrix before
CY> rotation, how could I get the coordinate(x,y,z) of the viewpoint in
the
CY> original coordinate system?
CY> thank you in advance.
CY> Chen
CY>
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