2 attribute highp vec2 aPosition;
3 varying highp vec2 vTexCoord;
4 uniform highp mat4 uMvpMatrix;
5 uniform highp vec3 uSize;
9 highp vec4 vertexPosition = vec4(aPosition * uSize.xy, 0.0, 1.0);
10 vTexCoord = aPosition + vec2(0.5);
11 gl_Position = uMvpMatrix * vertexPosition;