Just wanted to follow up on Stu Wier's question about setting the
projection "view".
visad.ProjectionControl as been modified with the following
methods added:
public void saveProjection() - Saves the current display projection matrix.
public void resetProjection() - Restores to projection matrix at time of last
saveProjection() call -- if one was made --
or to initial projection otherwise.
public double getSavedProjectionMatrix() - Get the matrix that defines
the saved graphics projection
saveProjection is called upon initialization and when setAspect() is
called. This means that if you want to implement a Reset button
on your UI to reset the display to the original view, you could
do something like:
DisplayImpl display = new DisplayImplJ3D("display");
ProjectionControl projControl = display.getProjectionControl();
JButton reset = new JButton("Reset");
reset.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e)
{
projControl.resetProjection();
}
});
Instead of having to keep track of the projection matrix and
setting it manually. This has been implemented in both ProjectionControlJ2D
and ProjectionControlJ3D.
Additionally, a setOrthoView method has been added to ProjectionControlJ3D
to allow one to easily switch the projection to one of the 6 sides of
the 3D cube. The signature is:
/**
* Set the projection so the requested view is displayed.
* @param view one of the static view fields (X_PLUS, X_MINUS, etc). This
* will set the view so the selected face is orthogonal to
* the display.
* @throws VisADException VisAD failure.
* @throws RemoteException Java RMI failure.
*/
public void setOrthoView(int view)
throws VisADException, RemoteException
with valid views being:
/** View of the postive X face of the display cube */
public static final int X_PLUS = 0;
/** View of the negative X face of the display cube */
public static final int X_MINUS = 1;
/** View of the postive Y face of the display cube */
public static final int Y_PLUS = 2;
/** View of the negative Y face of the display cube */
public static final int Y_MINUS = 3;
/** View of the postive Z face of the display cube */
public static final int Z_PLUS = 4;
/** View of the negative Z face of the display cube */
public static final int Z_MINUS = 5;
So to set the view so the cube face on the positive X side is orthogonal
to your view, you could call:
projControl.setOrthoView(ProjectionControlJ3D.X_PLUS);
If you have any questions or find any bugs, let me know.
Don
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Don Murray UCAR Unidata Program
dmurray@xxxxxxxxxxxxxxxx P.O. Box 3000
(303) 497-8628 Boulder, CO 80307
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