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Adds _repr_html_() to viewer class that renders an interactive Three.js point cloud inline in Jupyter notebooks. Supports RGB vertex colors, scalar-to-jet colormap, auto-subsampling for large clouds (>200k points), and orbit/zoom/pan controls. Includes example notebook and README update.
Add test_camera_math.py with pure-Python mirrors of the C++ camera functions (computeRightVector, computeUpVector, computeViewVector) and tests that validate the right-handed orthonormal frame, default orientation, pan direction, and axis-aligned view presets.
…ouds Add _MAX_POINTS_WARNING (500M) threshold that warns before loading very large point clouds. Apply the check in __load, __update, and __append. In the C++ octree, add a max recursion depth of 40 to buildTreeHelper to prevent stack overflow with degenerate point distributions.
Add message type 14 to the C++ viewer and a Python depth_capture(filename) method that renders the scene to an off-screen FBO, reads the depth buffer, and saves it as a 16-bit grayscale image.
Add a per-vertex size buffer (_buffer_user_sizes) and 'user_size' shader attribute to PointCloud. When user_size > 0 the shader uses it instead of the global point_size uniform. Exposed via message type handler in viewer.h and registered as a float-array property in viewer.py.
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