interface display {
    use %world.{entity};
    use text.{text-component};
    use item-stack.{item-stack};
    use uuid.{uuid};

    /// Billboard rendering constraints for display entities.
    enum billboard-mode {
        fixed,
        vertical,
        horizontal,
        center,
    }

    /// Item display transformation modes for item display entities.
    enum item-display-mode {
        none,
        thirdperson-lefthand,
        thirdperson-righthand,
        firstperson-lefthand,
        firstperson-righthand,
        head,
        gui,
        ground,
        fixed,
    }

    /// Text alignment options for text display entities.
    enum text-alignment {
        center,
        left,
        right,
    }

    /// 3D single-precision vector.
    record vector3f {
        x: f32,
        y: f32,
        z: f32,
    }

    /// Single-precision quaternion representing a 3D rotation.
    record quaternionf {
        x: f32,
        y: f32,
        z: f32,
        w: f32,
    }

    /// Transformation (translation, scale, left and right rotations) for display entities.
    record display-transformation {
        translation: vector3f,
        scale: vector3f,
        left-rotation: quaternionf,
        right-rotation: quaternionf,
    }

    /// Common base resource for all display entities.
    resource display-entity {
        from-entity: static func(entity: borrow<entity>) -> option<display-entity>;
        get-entity: func() -> entity;

        get-transformation: func() -> display-transformation;
        set-transformation: func(transformation: display-transformation);

        get-interpolation-duration: func() -> s32;
        set-interpolation-duration: func(duration: s32);

        get-interpolation-start: func() -> s32;
        set-interpolation-start: func(delta-ticks: s32);

        get-teleport-duration: func() -> s32;
        set-teleport-duration: func(duration: s32);

        get-billboard: func() -> billboard-mode;
        set-billboard: func(mode: billboard-mode);

        get-view-range: func() -> f32;
        set-view-range: func(range: f32);

        get-shadow-radius: func() -> f32;
        set-shadow-radius: func(radius: f32);

        get-shadow-strength: func() -> f32;
        set-shadow-strength: func(strength: f32);

        get-display-width: func() -> f32;
        set-display-width: func(width: f32);

        get-display-height: func() -> f32;
        set-display-height: func(height: f32);

        get-glow-color-override: func() -> s32;
        set-glow-color-override: func(color: s32);

        get-brightness: func() -> s32;
        set-brightness: func(brightness: s32);
    }

    /// Resource specifically for Block Display entities.
    resource block-display-entity {
        from-entity: static func(entity: borrow<entity>) -> option<block-display-entity>;
        get-display: func() -> display-entity;
        get-entity: func() -> entity;

        get-block-state-id: func() -> u16;
        set-block-state-id: func(state-id: u16);
    }

    /// Resource specifically for Item Display entities.
    resource item-display-entity {
        from-entity: static func(entity: borrow<entity>) -> option<item-display-entity>;
        get-display: func() -> display-entity;
        get-entity: func() -> entity;

        get-item: func() -> option<item-stack>;
        set-item: func(item: option<item-stack>);

        get-item-display-mode: func() -> item-display-mode;
        set-item-display-mode: func(mode: item-display-mode);
    }

    /// Resource specifically for Text Display entities.
    resource text-display-entity {
        from-entity: static func(entity: borrow<entity>) -> option<text-display-entity>;
        get-display: func() -> display-entity;
        get-entity: func() -> entity;

        get-text: func() -> text-component;
        set-text: func(text: text-component);

        get-line-width: func() -> s32;
        set-line-width: func(width: s32);

        get-background: func() -> s32;
        set-background: func(color: s32);

        get-text-opacity: func() -> s8;
        set-text-opacity: func(opacity: s8);

        get-shadow: func() -> bool;
        set-shadow: func(shadow: bool);

        get-see-through: func() -> bool;
        set-see-through: func(see-through: bool);

        get-default-background: func() -> bool;
        set-default-background: func(default-background: bool);

        get-alignment: func() -> text-alignment;
        set-alignment: func(alignment: text-alignment);
    }

    /// Resource specifically for Interaction entities.
    resource interaction-entity {
        from-entity: static func(entity: borrow<entity>) -> option<interaction-entity>;
        get-entity: func() -> entity;

        get-width: func() -> f32;
        set-width: func(width: f32);

        get-height: func() -> f32;
        set-height: func(height: f32);

        get-response: func() -> bool;
        set-response: func(response: bool);

        get-last-attacker: func() -> option<uuid>;
        get-last-interaction: func() -> option<uuid>;
    }
}