70000445 Support of webGL in web library

Article 70000445
Type Wish
Product WebJS
Date Added 5/15/2015 12:00:00 AM
Fixed (5/22/2015 12:00:00 AM)
Submitted by VectorDraw Team

Summary

Support of webGL in web library

Solution

In version 7004.1.0, WebGL was utilized by the vdraw web library in order to offer faster render.
In order to use it call the EnableWebGL() function within the vdrawObject of the library.

EnableWebGL(bool enable)

The function takes the following parameters
  • enable: If true enables WebGL, if false disables it.

When using WebGL it is essential to use the API as effectively as possible.
Towards this philosophy the web library draws the internal objects in blocks.
The size of this block can be defined by the SetBlockSize() function.
The default value is 100.
The higher the value, the faster they will be rendered.
Keep in mind that after a certain value, speed improvement is insignificant.
Also certain devices may fail after a certain block size.



SetBlockSize(int blockSize)

The function takes the following parameters
  • blockSize: The number of triangles to be rendered with each draw.

Due to the nature of WebGL there are certain restrictions.
  • Supported objects: vdPolyface, vd3DFace vdCurves with Thickness. All other object types are ignored.
  • No Osnaps supported with WebGL render.
  • No Wire mode is supported.
In general you should keep in mind that this mode is designed for fast display of 3D models, without the editing capabilities of the web library.

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