Function createProgram

src/gl-obj.js:20–23

(vert,frag)

    this.useProgram(this.program);
  },
  createProgram(vert,frag){
    let program=WebGL.createProgram(this.gl,vert,frag);
    return program;
  },
  useProgram(program){
    this.program=program;
    this.gl.useProgram(program);