Is there a way to draw a camera in a visualizer?

[bhkim94]

Hi,

Is there a way to draw a camera in a visualizer?
Like in the picture below, I want to put a camera icon in a visualizer with my extrinsic camera matrix.
I'm working on 0.13.0 in Python.

Thanks in advance.

[ssheorey]

http://www.open3d.org/docs/latest/python_api/open3d.geometry.LineSet.html#open3d.geometry.LineSet.create_camera_visualization

[prerakmody]

Sample Code for create_camera_visualization()

import pdb
import traceback
import open3d # 0.16.0
import numpy as np

print ('\n =============================== ')
print (f' ======  Open3D=={open3d.__version__}  ======= ')
print (' =============================== \n')

if __name__ == "__main__":

    try:

        # Step 0 - Init
        WIDTH = 1280
        HEIGHT = 720

        # Step 1 - Get scene objects
        meshFrame = open3d.geometry.TriangleMesh.create_coordinate_frame(size=1.0, origin=[0, 0, 0])
        sphere1 = open3d.geometry.TriangleMesh.create_sphere(radius=0.1)
        sphere1.translate([0.1, 0.2, 0.1])
        
        # Step 2 - Create visualizer object
        vizualizer = open3d.visualization.Visualizer()
        vizualizer.create_window()
        vizualizer.create_window(width=WIDTH, height=HEIGHT)

        # Step 3 - Add objects to visualizer
        vizualizer.add_geometry(sphere1)
        vizualizer.add_geometry(meshFrame)
        
        # Step 4 - Get camera lines
        standardCameraParametersObj     = vizualizer.get_view_control().convert_to_pinhole_camera_parameters()
        # cameraLines = open3d.geometry.LineSet.create_camera_visualization(intrinsic=standardCameraParametersObj.intrinsic, extrinsic=standardCameraParametersObj.extrinsic)
        cameraLines = open3d.geometry.LineSet.create_camera_visualization(view_width_px=WIDTH, view_height_px=HEIGHT, intrinsic=standardCameraParametersObj.intrinsic.intrinsic_matrix, extrinsic=standardCameraParametersObj.extrinsic)
        vizualizer.add_geometry(cameraLines)

        # Step 5 - Run visualizer
        vizualizer.run()

        # step 99 -- Debug
        pdb.set_trace()
    
    except:
        traceback.print_exc()
        pdb.set_trace()

[blackjacket996]

hello, I want to update cameralines in a for loop, and i have tried to generate new cameralines in every loop and add it into visualizer by visualizer.add_geometry(), but I got a empty screen when update_render().