#version 100
precision mediump float;
precision highp int;

struct Gradient
{
    vec4 color1;
    vec4 color2;
};

uniform Gradient _gradient;

varying highp float opacity;
varying highp vec2 vUV;

void main()
{
    gl_FragData[0] = mix(_gradient.color1, _gradient.color2, vec4(clamp(vUV.x, 0.0, 1.0))) * opacity;
}