gpu.js 不能被webpack 打包使用吗


## *What* is wrong?

## *Where* does it happen?

## *How* do we replicate the issue?

## *How* important is this (1-5)?

## Expected behavior (i.e. solution)

打包编译就报错 开发环境 很正常
renderer.js:1 Error: Error compiling fragment shader: ERROR: 0:404: '!' : wrong operand type - no operation '!' exists that takes an operand of type lowp int (or there is no acceptable conversion)
ERROR: 0:404: '&&' : wrong operand types - no operation '&&' exists that takes a left-hand operand of type 'bool' and a right operand of type 'void' (or there is no acceptable conversion)
## Other Comments