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Fly Through Mode.
In the fly through mode, mouse movements in the 2D windows control the viewpoint. The mode is entered/exited by checking/unchecking the Fly Through Mode items in the Graphics, 2D context, or 3D context menus. The Figure at left shows an example. The mode works properly in perspective projection. It will also change the viewpoint in the orthographic projection, but not in an intuitive manner.
When the fly through mode is active, a small triangle appears at the cursor position in the active 2D window to show the viewpoint location. The view is in the direction of the opening angle of the triangle. Cursor motion with the left button held down moves the viewpoint. Moving the cursor with the left button and control keys held down rotates the view direction. View direction rotation is also accomplished by control + arrow keys.
The vertical direction in the 3D window is rotated with the left mouse and either the shift or alt key held down. An arrow points in the up direction. When the shift key is used, the direction is constrained to multiples of 10°; there is no constraint when the alt key is used. The up direction and view direction should not be the same. If they are, the 3D window is blank.
Sometimes it is necessary to rotate the view direction when switching to another 2D window in order to get the expected viewpoint. We will work to correct this necessity.
 White Rock Science http://www.whiterockscience.com/wrs.html 505 672 1105 |
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