#version 330

out vec4 outputColor;

uniform vec3 viewPos;
uniform sampler2D texture0;

in vec4 FarColor;
in vec3 FragPos;
in vec2 TexCoord;
in vec4 TexType;
in float RealType;

void main()
{
    float tileSize = 64.0 / 512.0;

    vec2 uvOffsets[4];
    uvOffsets[0] = vec2(mod(TexType.x, 8.0), floor(TexType.x / 8.0)) * tileSize;
    uvOffsets[1] = vec2(mod(TexType.y, 8.0), floor(TexType.y / 8.0)) * tileSize;
    uvOffsets[2] = vec2(mod(TexType.z, 8.0), floor(TexType.z / 8.0)) * tileSize;
    uvOffsets[3] = vec2(mod(TexType.w, 8.0), floor(TexType.w / 8.0)) * tileSize;

    vec4 blendedColor = vec4(0.0);
    for (int i = 0; i < 4; i++) {
        vec2 uv = TexCoord * tileSize + uvOffsets[i];
        blendedColor += texture(texture0, uv) * 0.25;
    }

    float distance = length(viewPos - FragPos);
    float interpolationFactor = clamp(distance / 1000.0, 0.0, 1.0);
    outputColor = mix(blendedColor, FarColor, interpolationFactor);
}