struct MaterialStruct {
    int ambientTexutre;
    int diffuseTexture;
    int specularTexture;
    int bumpTexture;

    vec4 ambientColor;
    vec4 diffuseColor;
    vec4 specularColor;

    float specularComponent;
    float alpha;
    int illuminationModel;
};

layout (std140) uniform MaterialsBlock {
    MaterialStruct materials[8];
} u_materials;