[BUG] Can't get gl.VERSION correctly.

[finscn]

three.js/src/renderers/webgl/WebGLState.js

Line 345 in e2973b7

var version = parseFloat( /^WebGL\ ([0-9])/.exec( gl.getParameter( gl.VERSION ) )[ 1 ] );

on some android platforms , the code

/^WebGL\ ([0-9])/.exec( gl.getParameter( gl.VERSION ) )

will return null (because there is no WebGL, only OpenGL ES),
so , this line will take an error Cannot read '1' of null.

Suggestion :

change to

var version = /^WebGL\ ([0-9])/.exec( gl.getParameter( gl.VERSION ) );
version = version ? parseFloat(  version[ 1 ] ) : 1.0; 

[eastecho]

Same here.

I'm running three.js with WeChat platform, the same problem occured.

[Mugen87]

(because there is no WebGL, only OpenGL ES)

Does that mean you are not using three.js in a browser but in a WebView or something?

[finscn]

@Mugen87 , in browser , but it's the built-in browser of custom ROM .
In China , there are many custom ROMs in different android phones.

[Mugen87]

I'm curious how these browsers internally work 🤔. They have a WebGL API but no WebGL implementation?

[finscn]

@Mugen87 , they could run many webgl app , just information of gl.VERSION is incorrect.
So magic ...

[Mugen87]

I've realized that there is already a PR for introducing OpenGL ES support: #13046

@finscn Can you please check what's different compared to your PR? I think one PR that tackles the issue is sufficient.

[finscn]

@Mugen87 , I read the #13046 , and it inspires me.
I've updated my PR.
Now , I think my PR #13211 is better than #13046.
Whatever , thanks , @raindust .