#version 450 core
in vec2 vUv;
out vec4 FragColor;
uniform sampler2D uTexture;
uniform bool uUseTexture;
uniform bool uUseGradient;
uniform vec4 uColor;
uniform vec4 uGradientTop;
uniform vec4 uGradientBottom;

void main() {
    if (uUseTexture) {
        FragColor = texture(uTexture, vUv) * uColor;
    } else if (uUseGradient) {
        FragColor = mix(uGradientTop, uGradientBottom, vUv.y);
    } else {
        FragColor = uColor;
    }
}