为什么当我左键单击 window 时 Open3d Visualization 消失了？

Question

我尝试在 python 中编写一个简单的应用程序，它在右侧查看 3d 网格，并在单个 window.

中在左侧显示一些用户输入

我使用 SceneWidget 可视化网格并将其添加到水平 gui 元素。我还向该 gui 元素添加了一个文件选择器，然后将 gui 元素添加到 window。到目前为止一切顺利，它似乎按预期工作，但只要我在 window 内单击鼠标左键，可视化就会消失，没有任何错误消息。有谁知道为什么并且可以帮助我吗？

代码如下：

import os.path
import sys

import open3d as o3d
import open3d.visualization.gui as gui
import open3d.visualization.rendering as rendering

print("Project")
print("python version", sys.version)
print("open3d version", o3d.__version__)

class WindowApp:

    def __init__(self):
        self.window = gui.Application.instance.create_window("Project", 1400, 900)
        w = self.window

        # member variables
        self.model_dir = ""
        self.model_name = ""
        
        em = w.theme.font_size
        layout = gui.Horiz(0, gui.Margins(0.5 * em, 0.5 * em, 0.5 * em, 0.5 * em))
        # 3D Widget
        _widget3d = gui.SceneWidget()
        _widget3d.scene = rendering.Open3DScene(w.renderer)
        _widget3d.set_view_controls(gui.SceneWidget.Controls.ROTATE_CAMERA)
        mesh = o3d.geometry.TriangleMesh.create_sphere()
        mesh.compute_vertex_normals()
        material = rendering.MaterialRecord()
        material.shader = "defaultLit"
        _widget3d.scene.add_geometry('mesh', mesh, material)
        _widget3d.scene.set_background([200, 0, 0, 200]) # not working?!
        _widget3d.scene.camera.look_at([0, 0, 0], [1, 1, 1], [0, 0, 1])
        _widget3d.set_on_mouse(self._on_mouse_widget3d)

        # gui layout
        gui_layout = gui.Vert(0, gui.Margins(0.5 * em, 0.5 * em, 0.5 * em, 0.5 * em))
        # File-chooser widget
        self._fileedit = gui.TextEdit()
        filedlgbutton = gui.Button("...")
        filedlgbutton.horizontal_padding_em = 0.5
        filedlgbutton.vertical_padding_em = 0
        filedlgbutton.set_on_clicked(self._on_filedlg_button)

        fileedit_layout = gui.Horiz()
        fileedit_layout.add_child(gui.Label("Model file"))
        fileedit_layout.add_child(self._fileedit)
        fileedit_layout.add_fixed(0.25 * em)
        fileedit_layout.add_child(filedlgbutton)
        # add to the top-level (vertical) layout
        gui_layout.add_child(fileedit_layout)

        layout.add_child(gui_layout)
        layout.add_child(_widget3d)
        w.add_child(layout)

    def _on_mouse_widget3d(self, event):
        print(event.type)
        return gui.Widget.EventCallbackResult.IGNORED

    def _on_filedlg_button(self):
        filedlg = gui.FileDialog(gui.FileDialog.OPEN, "Select file",
                                 self.window.theme)
        filedlg.add_filter(".obj .ply .stl", "Triangle mesh (.obj, .ply, .stl)")
        filedlg.add_filter("", "All files")
        filedlg.set_on_cancel(self._on_filedlg_cancel)
        filedlg.set_on_done(self._on_filedlg_done)
        self.window.show_dialog(filedlg)

    def _on_filedlg_cancel(self):
        self.window.close_dialog()

    def _on_filedlg_done(self, path):
        self._fileedit.text_value = path
        self.model_dir = os.path.normpath(path)
        # load model
        self.window.close_dialog()

def main():
    gui.Application.instance.initialize()
    w = WindowApp()
    gui.Application.instance.run()

if __name__ == "__main__":
    main()

我使用 open3d 库版本 0.15.1 和 python3.9.

注意 - 如果我将 SceneWidget 直接添加到 window 它可以工作，但是我不能在左边有 gui。

有人对此有解决方案吗？

Answer 1

最后我找到了解决办法：将 Scenewidget 添加到 gui 容器似乎不起作用。但是将它封装在一个框架内并将其移动到右侧并直接将其添加到 window 工作。 _widget3d.frame = gui.Rect(500, w.content_rect.y, 900, w.content_rect.height) 也可以用类似的方式为 gui 创建框架。

这里是任何感兴趣的人的工作代码：

class WindowApp:

    def __init__(self):
        self.window = gui.Application.instance.create_window("Spinnables", 1400, 900)
        w = self.window

        # member variables
        self.model_dir = ""
        self.model_name = ""

        em = w.theme.font_size
        # 3D Widget
        _widget3d = gui.SceneWidget()
        _widget3d.scene = rendering.Open3DScene(w.renderer)
        _widget3d.set_view_controls(gui.SceneWidget.Controls.ROTATE_CAMERA)
        # create a frame that encapsulates the Scenewidget
        _widget3d.frame = gui.Rect(500, w.content_rect.y,
                                        900, w.content_rect.height)
        mesh = o3d.geometry.TriangleMesh.create_sphere()
        mesh.compute_vertex_normals()
        material = rendering.MaterialRecord()
        material.shader = "defaultLit"
        _widget3d.scene.add_geometry('mesh', mesh, material)
        _widget3d.scene.set_background([200, 0, 0, 200]) # not working?!
        _widget3d.scene.camera.look_at([0, 0, 0], [1, 1, 1], [0, 0, 1])
        _widget3d.set_on_mouse(self._on_mouse_widget3d)

        # gui layout
        gui_layout = gui.Vert(0, gui.Margins(0.5 * em, 0.5 * em, 0.5 * em, 0.5 * em))
        # create frame that encapsulates the gui
        gui_layout.frame = gui.Rect(w.content_rect.x, w.content_rect.y,
                                    500, w.content_rect.height)
        # File-chooser widget
        self._fileedit = gui.TextEdit()
        filedlgbutton = gui.Button("...")
        filedlgbutton.horizontal_padding_em = 0.5
        filedlgbutton.vertical_padding_em = 0
        filedlgbutton.set_on_clicked(self._on_filedlg_button)

        fileedit_layout = gui.Horiz()
        fileedit_layout.add_child(gui.Label("Model file"))
        fileedit_layout.add_child(self._fileedit)
        fileedit_layout.add_fixed(0.25 * em)
        fileedit_layout.add_child(filedlgbutton)
        # add to the top-level (vertical) layout
        gui_layout.add_child(fileedit_layout)

        w.add_child(gui_layout)
        w.add_child(_widget3d)

为什么当我左键单击 window 时 Open3d Visualization 消失了？

Why does Open3d Visualization disappear when I left click the window?

python

user-interface

open3d