#version 430 core

out vec4 FragColor;
in vec2 fragUV;
in vec3 fragPos;
in float lighting;

uniform sampler2D uTexture;
uniform vec3 cameraPosition;

void main()
{
    float fogEnd = 512;
    float fogStart = 32;

    float dist = length(cameraPosition - fragPos);
    float fogFactor = (fogEnd - dist) / (fogEnd - fogStart);
    fogFactor = clamp(fogFactor, 0, 1);

    vec4 fogColor = vec4(0.8,0.8,0.8,1);
    vec4 texColor = texture(uTexture, fragUV) * lighting;
    vec4 color = mix(fogColor, texColor, fogFactor);

    FragColor = vec4(color.rgb, texColor.a);
}