1 attribute mediump vec2 aPosition;
2 uniform mediump mat4 uMvpMatrix;
3 uniform mediump vec3 uSize;
4 varying mediump vec2 vTexCoord;
8 vec4 position = vec4(aPosition, 0.0, 1.0) * vec4(uSize, 1.0);
9 vTexCoord = aPosition + vec2(0.5);
10 gl_Position = uMvpMatrix * position;