#version 330

// Input vertex attributes (from vertex shader)
in vec3 fragPosition;
in vec2 fragTexCoord;
in vec4 fragColor;
in vec3 fragNormal;

// Input uniform values
uniform sampler2D texture0;
uniform sampler2D texture1;
uniform vec4 colDiffuse;

#define POSTERIZE 5.0

out vec4 finalColor;

void main() {
    vec4 texelColor = texture(texture0, fragTexCoord);
    float grey = 0.21 * texelColor.r + 0.71 * texelColor.g + 0.07 * texelColor.b ;
    vec2 paluv = vec2(grey, 0.5);
    vec4 paletteValue = texture(texture1, paluv);

    finalColor.a = 1.0;
    // finalColor.rgb = floor(texelColor.rgb * POSTERIZE) / POSTERIZE;

    finalColor.rgb = paletteValue.rgb;
    //
    // finalColor.rgb = vec3(mean) + paletteValue.rgb;
}