# Shader Setup

Create Shader（Vertex and Fragment）
Compile Shader
Attach shader to progrqam
Link Program
Use Program

# Vertex Shader

attribute vec3 aVertexPosition;
attribute vec3 aNormalPosition;
attribute vec2 aTextureCoord;

uniform mat4 uModelViewMatrix;
uniform mat4 uProjectionMatrix;

varying highp vec2 vTextureCoord;
varying highp vec3 vFragPos;
varying highp vec3 vNormal;

void main(void){
  vFragPos = aVertexPosition;
  vNormal = aNormalPosition;

  gl_Position = uProjectionMatrix * uModelViewMatrix * vec4(aVertexPosition,1.0);

  vTextureCoord = aTextureCoord;
}