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Focusing point with camera #133

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Focusing point with camera#133

Description

@kingjin94
kingjin94
opened on Feb 24, 2023

When generating more complex scenes I would like to guide the user's view to the most important elements.

The demos suggest using

viz.viewer["/Cameras/default"].set_transform(<Some 4x4 matrix>))
viz.viewer["/Cameras/default/rotated/<object>"].set_property("position", [x, y, z])

How do you use these to move the camera close to an arbitrary position, such as (10., 0., 0.) and look at this arbitrary position?

The set_property seems to be able to reposition the camera (in the three js system where "up" = z_meshcat = +y_three_js and z_three_js = -y_meshcat). The camera seems to keep focusing on the origin. How to do you change the position the camera points at and pans around?

Activity

  1. ManifoldFR commented on Feb 24, 2023

    @ManifoldFR
    ManifoldFR
    on Feb 24, 2023
    Contributor

    Hi @kingjin94 ! I have an open PR about this: #109

  2. kingjin94 commented on Feb 24, 2023

    @kingjin94
    kingjin94
    on Feb 24, 2023
    Author

    Great to hear that it is not just a problem of understanding the available API 😅 Is there any way I could help to expedite this PR?

  3. ManifoldFR commented on Mar 17, 2023

    @ManifoldFR
    ManifoldFR
    on Mar 17, 2023
    Contributor

    Great to hear that it is not just a problem of understanding the available API sweat_smile Is there any way I could help to expedite this PR?

    I'm not sure. The maintainer seems very busy and maybe would like some help to look at PRs and merge them.

    @rdeits, are you open to onboarding some folks to help maintain meshcat?

  4. GianniLunardi commented on May 8, 2024

    @GianniLunardi
    GianniLunardi
    on May 8, 2024

    Hi all,

    I see that the pull request #109 has been merged. But in my code if do something like:

    viz = pin.visualize.MeshcatVisualizer(rmodel, collision, visual)
viz.initViewer(loadModel=True, open=True)
viz.setCameraPosition(np.array([0.6, 0., -0.15]))
viz.setCameraTarget(np.array([0., 1, 0.]))

    then setCameraTarget does not change anything and the camera keep focusing on the origin. Am I doing something wrong or the problem is still existing?
    I have installed the last versione from source.

  5. zimmerman-pliant commented on Jun 13, 2024

    @zimmerman-pliant
    zimmerman-pliant
    on Jun 13, 2024

    It's set_cam_target() and set_cam_pos(), see here.

    Working well for me installed from source.

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