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May 20, 2011
You view three dimensional drawings by setting the viewing direction. The viewing direction establishes the viewing position, the Cartesian coordinate corresponding to the viewpoint looking back at the origin point, the 0,0,0 coordinate. When you view a drawing from the default viewpoint (0,0,1), you see a plan view of the drawing.
You can change the viewing direction to look at the drawing from a different vantage point or to work on a three dimensional model from a different orientation.
To set a new viewing direction
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Choose View > 3D Views > Viewpoint Presets.
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Click the preset button.
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Click the preset view you want to use.
Command line SETVPOINT
You can set the current viewing direction to the plan view of the current user coordinate system (UCS), a previously saved UCS, or the World Coordinate System (WCS).
To dynamically set a view direction
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Choose View- 3D Views – Viewpoint Presets.
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Click the appropriate tools to dynamically change the viewpoint.
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To complete the command, click OK.
Command line DDVPOINT
You can dynamically rotate the viewpoint within the xy plane and relative to the xy plane, and you can pan and zoom the drawing. As you change the viewpoint settings, the drawing display automatically updates.
To display a plan view of the current drawing
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Choose View > 3D Views > Plan View.
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It concludes three plan views: Current UCS, World, UCS. Choose one what you want.
Command line PLAN
Commands Reference
DVIEW: Defines parallel projection or perspective views
PLAN: Displays the plan view of a specified user coordinate system
VPOINT: Sets the viewing direction for a three-dimensional visualization of the drawing
System Variables Reference
VIEWDIR: Stores the viewing direction in the current viewport expressed in UCS coordinates
WORLDVIEW: Determines whether input to the DVIEW, and VPOINT commands is relative to the WCS (default) or the current UCS
BACKZ: Stores the back clipping plane offset from the target plane for the current viewport, in drawing units
FRONTZ: Stores the front clipping plane offset from the target plane for the current viewport, in drawing units
VIEWTWIST: Stores the view twist angle for the current viewport
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