| /** | |
| * Convert standard camera intrinsic and extrinsic parameters to a vtkCamera instance for rendering | |
| * Assume square pixels and 0 skew (for now). | |
| * | |
| * focal_len : camera focal length (units pixels) | |
| * nx,ny : image dimensions in pixels | |
| * principal_pt: camera principal point, | |
| * i.e. the intersection of the principal ray with the image plane (units pixels) | |
| * camera_rot, camera_trans : rotation, translation matrix mapping world points to camera coordinates | |
| * depth_min, depth_max : needed to set the clipping range |
A small multi-threaded C++ library (so, does not include any main) compiled with emscripten and pthread running under the main thread in the browser, a web worker or using node.js.
Running this lib in the main thread is fine but, obviously, block the main thread. Running it using a web worker leads no error with modification of the worker script (see below)
Run fine except that it prevents Node app from ever exiting.
| import vtk | |
| import numpy as np | |
| from vtk.util import numpy_support | |
| import cv2 | |
| class Camera_VTK(): | |
| """ | |
| Example class showing how to project a 3D world coordinate onto a 2D image plane using VTK |