Archived discussion

The Triedron changes position

Visualization and 3D ViewerFri, 03/04/2022 - 05:556 replies

QuestionAuthorFri, 03/04/2022 - 05:55

Hi,
I use OCC to display a coordinate system. When I zoom the window, the coordinate system shifts!
This problem also exists in the OCC sample androidqt Who can help me?

The code below:
V3d_View::TriedronDisplay(Aspect_TOTP_LEFT_LOWER,Quantity_NOC_RED, 0.1, V3d_ZBUFFER);

Discussion

6 archived replies

Posts are displayed in their archived order.

01Commenter-1Fri, 03/04/2022 - 11:59

You are zooming into an empty scene?

02AuthorFri, 03/04/2022 - 12:37

No,I only changed the size of the view window, which is easy to happen when the height is getting smaller and smaller!

03Commenter-1Fri, 03/04/2022 - 15:23

If you application is not expected to work as a tiny horizontal viewer, then it makes sense preventing window resize smaller than predefined values.

Otherwise, you may override Graphic3d_Camera::FOV2d() default value (set to 180 degrees) to something less reliable like 360 degrees.

04AuthorMon, 03/07/2022 - 05:28

Thank you for your reply.
I modified the value and it didn't take effect.
The code below:
myView->DefaultCamera()->SetFOV2d(360.0);

Is there something wrong?

05Commenter-1Mon, 03/07/2022 - 20:01

Your code changes V3d_View::DefaultCamera(), not active camera (V3d_View::Camera()). Not sure that your code makes any change.

06AuthorTue, 03/08/2022 - 03:09

I use active camera,the problem also occurs.