#version 300 es
precision mediump float;
uniform sampler2D tex;
in float _alphaFac;
layout(location = 0) out vec4 color;
void main()
{
    vec4 c = texture(tex,gl_PointCoord);
    if(c.a<0.3)
        discard;
    color = c;
    color.a = color.a * _alphaFac;
}