![]() | View menu: 3D Dynamic View |
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Command line: dview |
Select objects: Select objects or press ENTER
After you've selected objects or pressed ENTER to use DVIEWBLOCK, AutoCAD LT prompts
CAmera / TArget / Distance / POints / PAn / Zoom / TWist / CLip / Hide / Off / Undo / <eXit>: Specify a point with your pointing device, enter an option, or press ENTER
To help you view a model from any point in space, DVIEW uses a camera-target metaphor. The line of sight, or viewing direction, is the line between the camera and the target.
DVIEW uses objects you select or a special block named DVIEWBLOCK to display a preview image. The preview image shows the changes you make in the view. When you end the command, AutoCAD LT regenerates the drawing based on the view you set.
Transparent ZOOM, DSVIEWER, PAN, and scrollbars are not available in DVIEW. When you define a perspective view, ZOOM and PAN, along with transparent ZOOM, DSVIEWER, PAN, and scrollbars, are not available while that view is current.
When you select objects, they are dragged in the preview image as you change views. Selecting too many objects slows image dragging and updating.
If you press ENTER at the Select Objects prompt, AutoCAD LT uses DVIEWBLOCK for the preview image. You can create your own DVIEWBLOCK block in a 1x1x1-unit area, with its origin at the lower-left corner. The following illustration shows an example of using the default DVIEWBLOCK to set the view (moving the graphics cursor adjusts the view).
Rolls the view under the camera. The point you select with your pointing device is a starting point for the dragging operation. Your viewing direction changes about the target point as you move the cursor.
Enter direction and magnitude angles: Enter angles from 0 through 360 degrees or specify a point with your pointing device
Enter both angles, separated by a comma. The angles must be positive. The direction angle indicates the front of the view, and the magnitude angle determines how far the view rolls.
Specifies a new camera position by rotating the camera about the target point. Two angles determine the amount of rotation.
Toggle angle in / Enter angle from XY plane <current>: Enter t, enter an angle, or press ENTER
After you've toggled the angle input mode or specified the angle from the XY plane, AutoCAD LT prompts:
Toggle angle from / Enter angle in XY plane from X axis <current>: Enter t, enter an angle, or press ENTER
The illustrations show how the camera rotates to the left from its initial position, leaving its angle from the XY plane unchanged.
Switches between two angle input modes. Entering an angle on the command line locks the cursor movement so you see only the positions available for that angle. The toggle option unlocks the cursor movement for the angle, and you can use the cursor to rotate the camera.
Sets the camera's position at an angle above or below the XY plane. An angle of 90 degrees looks down from above, and an angle of -90 degrees looks up from below. A camera angle of 0 degrees places the camera parallel to the XY plane of the UCS.
Switches between two angle input modes. Entering an angle on the command line locks the cursor movement so you see only the positions available for that angle. The toggle option unlocks the cursor movement for the angle, and you can use the cursor to rotate the camera.
Sets the camera's position at an angle in the XY plane relative to the X axis of the current UCS. This angle measures from -180 to 180 degrees. With rotation angle of 0 degrees, you look down the X axis of the UCS toward the origin.
Specifies a new position for the target by rotating it around the camera. The effect is like turning your head to see different views of the drawing from one vantage point. Two angles determine the amount of rotation.
Toggle angle in / Enter angle from XY plane <current>: Enter t, enter an angle, or press ENTER
After you've toggled the angle input mode or specified the angle from the XY plane, AutoCAD LT prompts:
Toggle angle from / Enter angle in XY plane from X axis <current>: Enter t, enter an angle, or press ENTER
The following illustrations show the effect of rotating the target point from left to right, leaving its angle from the XY plane unchanged.
Sets the target's position at an angle above or below the XY plane. An angle of 90 degrees looks down from above, and an angle of -90 degrees looks up from below. A target angle of 0 degrees places the target parallel to the XY plane of the UCS.
Sets the target's position at an angle of rotation in the XY plane relative to the X axis of the current UCS. This angle measures from -180 to 180 degrees. With rotation angle of 0 degrees, you look down the X axis of the UCS toward the origin.
Moves the camera in or out along the line of sight relative to the target. This option turns on perspective viewing, which causes objects farther from the camera to appear smaller than those closer to the camera. A special perspective icon replaces the coordinate system icon. AutoCAD LT prompts for the new camera-to-target distance.
New camera / target distance <current>: Enter a distance or press ENTER
A slider bar is displayed along the top of the graphics window and is labeled from 0x to 16x, with 1x representing the current distance. Move the slider bar cursor to the right to increase the distance between the camera and target. Move the cursor to the left to decrease that distance. To turn off perspective viewing, use the Off option. If the target and camera points are close together, or if you specify a long-focal-length lens, you might see very little of your drawing when you specify a new distance. If you see little or none of your drawing, try the maximum scale value (16x) or enter a large distance. To magnify the drawing without turning perspective viewing on, use the DVIEW Zoom option. The illustration shows the effect of moving the camera along the line of sight relative to the target, where the field of view remains constant.
Locates the camera and target points using X,Y,Z coordinates. You can use XYZ point filters. You must specify these points in a nonperspective view. If perspective viewing is on, AutoCAD LT turns it off while you specify new camera and target locations and then redisplays the preview image in perspective view.
Enter target point <current>: Specify a point or press ENTER
To help you define a new line of sight, AutoCAD LT draws a rubber-band line from the current camera position to the crosshairs. Then AutoCAD LT prompts you for a new camera location.
Enter camera point <current>: Specify a point, enter direction and magnitude angles, or press ENTER
A rubber-band line connects the target point to the crosshairs to help you place the camera relative to the target. The illustration shows the change in view as the camera and target points are swapped. Lens and distance settings are the same in each case.
Swapping camera and target points
For information on entering direction and magnitude angles, see Point Specification.
Shifts the image without changing the level of magnification.
Displacement base point: Specify a point
Second point: Specify a point
If perspective viewing is off, Zoom dynamically increases or decreases the apparent size of objects in the current viewport.
Adjust zoom scale factor <current>: Specify a scale or press ENTER
A slider bar is displayed along the top of the graphics window and labeled from 0x to 16x, with 1x representing the current scale. Move the slider bar cursor to the right to increase the scale. Move the cursor to the left to decrease the scale.
If perspective viewing is on, Zoom adjusts the camera lens length, which changes the field of view and causes more or less of the drawing to be visible at a given camera and target distance. The default lens length is 50mm, simulating what you would see with a 35mm camera and a 50mm lens. Increasing the lens length is similar to switching to a telephoto lens. Decreasing the lens length widens the field of view, as with a wide-angle lens.
Adjust lenslength <current>: Specify a value or press ENTER
A slider bar is displayed along the top of the graphics window and labeled from 0x to 16x, with 1x representing the current lens length. Move the slider bar cursor to the right to increase the lens length. Move the cursor to the left to decrease the lens length.
Twists or tilts the view around the line of sight. AutoCAD LT measures the twist angle counterclockwise, with 0 degrees to the right.
New view twist <current>: Specify a value or press ENTER
Clips the view, obscuring portions of the drawing that are behind or in front of the front clipping plane. The front and back clipping planes are invisible walls that you can position perpendicular to the line of sight between the camera and target.
Back / Front / <Off>: Enter an option or press ENTER
Disables front and back clipping. If perspective viewing is on, front clipping remains on at the camera position.
Obscures objects located behind the back clipping plane.
ON / OFF / <Distance from target> <current>: Specify a distance, enter an option, or press ENTER
Obscures objects located between the camera and the front clipping plane.
Eye / ON / OFF / <Distance from target> <current>: Specify a distance, enter an option, or press ENTER
Performs hidden line suppression on the selected objects to aid visualization. Circles, 2D solids, wide polyline segments, and extruded objects have opaque surfaces and can hide other objects. This hidden line suppression is quicker than that performed by HIDE, but it can't be plotted.
Turns off perspective viewing. The Distance option turns on perspective viewing.
Reverses the effects of the last DVIEW operation. You can undo multiple DVIEW operations.