precision highp float;

uniform sampler2D uParticlesA;
uniform float uParticleSize;

attribute vec2 vPosition;

varying vec2 fPosition;

void main() {
    vec4 particleAData = texture2D(uParticlesA, vPosition);

    gl_Position = vec4(
        particleAData.x,
        particleAData.y,
        0,
        1);
    gl_PointSize = uParticleSize;
    fPosition = vPosition;
}