SECTION D33 - TASK 33
View directions - Viewpoints and The vpoint command.
Task Thirty Three
An Alternative Vpoint Method
Confusion can arise when entities seem to lie on top of each other. This is likely to be the case in task 32 if you are viewing the image from Vpoint 1,1,1. It can be overcome by changing the Vpoint slightly. The method below is an alternative to the 1,1,1 method used in task 3, so change the viewpoint anyway even if you completed task 32.
| Autocad Command Sequence | Note |
| Command: vpoint > | |
| *** Switching to the WCS *** (Read comment a./ below) | a./ |
| Current view direction: VIEWDIR=1.0000,1.0000,1.0000 | |
| Specify a view point or [Rotate] < display compass and tripod > : r > | |
| Enter angle in XY plane from X axis < 45 > : 50 > | |
| Enter angle from XY plane < 35 > : 28 > | |
| *** Returning to the UCS *** | |
| Regenerating model. | |
| Command: | |
| a. Notice the Ucs is temporarily at its default "world" position. The command prompts apply to the Wcs. Read and fully understand the prompts shown in red above. AutoCADs first request for an angle value refers, as is usual in mathematics, to an anti-clockwise direction from the x axis rotating toward y at 90. The second prompt is the angle value rising from the horizontal XY plane. |
|
All four quadrant lines will now be visible. Save this view with the name 70.
(Task 5 to revise view saving.)
Experiment with other ’vpoint’ angle values, they're absolute not incremental. By
using a range of values from 0 to 360 for each prompt, the user is able to view objects from any position
be it birds eye, worms eye, back or front. For many people, this Vpoint - R method is considerably easier
for pre-visualising the chosen viewpoint. After experimenting with the Vpoint > R command,
restore view 70 as described in task 5. (For newer software, see the bottom paragraph
of task 5. For older software see the third paragraph after the note of task 5.)
Don't forget to add the 4 quadrant lines from task 32.
(Troubleshooting)
Please feel welcome to make use of the free resources at the side and bottom of these webpages. Many of them contain very useful 3D CAD material.
