#version 150 core

uniform sampler2D tex;
uniform float time;

in vec3 color;
in vec2 coord;

out vec4 outColor;

void main() {
    vec2 sampleCoord;

    if(coord.y < 0.75) {
        sampleCoord = coord;
    } else {
        sampleCoord = vec2(
            coord.x + 0.025 * sin(time * 1.5 + coord.y * 80.0),
            (1.0 - coord.y) * 3
        );
    }

    outColor = texture(tex, sampleCoord) * vec4(color, 1.0);
}