precision highp float;

uniform sampler2D uParticlesB;
uniform vec4 uColor;

varying vec2 fPosition;

void main() {
    vec4 particleBData = texture2D(uParticlesB, fPosition);
    gl_FragColor = vec4(uColor.x, uColor.y, uColor.z, uColor.w * particleBData.x);
}