Const vertexShaderText
vertexShaderText: "precision highp float;attribute vec2 readPos;attribute vec2 writePos;varying vec2 pos;void main(void) {pos = readPos;gl_Position = vec4(writePos,0.0, 1.0);}" = `precision highp float;attribute vec2 readPos;attribute vec2 writePos;varying vec2 pos;void main(void) {pos = readPos;gl_Position = vec4(writePos,0.0, 1.0);}`