XB PointStream

A cross-browser JavaScript tool which will emulate Arius3D's PointStream viewer. It will be able to quickly render a large amount of point cloud data to the <canvas> tag using WebGL.

XB PointStream Dev Links:
3D Gallery Specifications
LightHouse
Github
Twitter

Development Resources:
GPU Gems
GPU Gems 2

WebGL Specification
WebGL Cheat Sheet
OpenGLES 2.0 man pages

Occlusion Culling Algorithms

Performance Issue Ideas

• Spatially partition point cloud into Bounding volume hierarchy and do bounding volume frustum culling
• Do static rendering
• Render low LOD when rotating point cloud
• Push as much as we can to CPU and GPU
• Use GL_ARB_occlusion_query to cull points which do not contribute to the scene (render BB of octant and count contributing fragments). This can be used for culling 'backface points'
• Use progressive "mesh" optimization to render objects if they are far from the camera
• Allow user to control LOD
• Stream point cloud, dynamically create and merge bounding volumes
• Pre-create Bounding volume hierarchy