XB PointStream
Contents
Releases
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.
XBPS 0.1
XBPS 0.2
XBPS 0.3
XBPS 0.4
XBPS 0.4.5 [Only Lib | Full]
XB PointStream Dev Links
3D Image Gallery
Blogs
Specifications
LightHouse
Github
Twitter
YouTube Videos
Development Resources
WebGL Specification
WebGL Cheat Sheet
OpenGLES 2.0 man pages
Parser Interface
/*
Add an event listener to the parser. Once the event fires, the
associated function will be called, which will pass in a reference
to itself. This way the library knows which parser it is working with.
@param {String} eventName - can be
"onstart" - must occur exactly once
"onparse" - must occur one or many times
"onfinish" - must occur exactly once
"hook" - ?
@param {Function} func - the function to call when the event occurs
*/
addEventListener(eventName, func)
/*
Begins to load the resource
@param {String} path - Path to resource
*/
load(path)
/*
Get the version of this parser.
@returns {String} parser version
*/
getVersion()
/*
Get the number of points which have been parsed.
@returns {Number} the number of points parsed so far by the parser.
*/
getNumParsedPoints()
/*
Get the total number of points in the point cloud, including points
which have not yet been parsed.
@returns {Number} the total number of points in the resource or -1 if unknown.
*/
getNumTotalPoints()
/*
Get the progress of the parser, how much it has parsed so far.
@returns {Number} value from 0 to 1 or -1 if unknown.
*/
getProgress()
/*
The size of the resource in bytes.
@returns {Number} the number of bytes in the resource or -1 if unknown.
*/
getFileSize()
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 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
