area_2d.h

/*************************************************************************/
/*  area_2d.h                                                            */
/*************************************************************************/
/*                       This file is part of:                           */
/*                           GODOT ENGINE                                */
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/* Copyright (c) 2007-2016 Juan Linietsky, Ariel Manzur.                 */
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/* a copy of this software and associated documentation files (the       */
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/*************************************************************************/
#ifndef AREA_2D_H
#define AREA_2D_H

#include "scene/2d/collision_object_2d.h"
#include "vset.h"

class Area2D : public CollisionObject2D {

    OBJ_TYPE( Area2D, CollisionObject2D );
public:

    enum SpaceOverride {
        SPACE_OVERRIDE_DISABLED,
        SPACE_OVERRIDE_COMBINE,
        SPACE_OVERRIDE_COMBINE_REPLACE,
        SPACE_OVERRIDE_REPLACE,
        SPACE_OVERRIDE_REPLACE_COMBINE
    };
private:


    SpaceOverride space_override;
    Vector2 gravity_vec;
    real_t gravity;
    bool gravity_is_point;
    real_t gravity_distance_scale;
    real_t linear_damp;
    real_t angular_damp;
    uint32_t collision_mask;
    uint32_t layer_mask;
    int priority;
    bool monitoring;
    bool monitorable;
    bool locked;

    void _body_inout(int p_status,const RID& p_body, int p_instance, int p_body_shape,int p_area_shape);

    void _body_enter_tree(ObjectID p_id);
    void _body_exit_tree(ObjectID p_id);

    struct ShapePair {

        int body_shape;
        int area_shape;
        bool operator<(const ShapePair& p_sp) const {
            if (body_shape==p_sp.body_shape)
                return area_shape < p_sp.area_shape;
            else
                return body_shape < p_sp.body_shape;
        }

        ShapePair() {}
        ShapePair(int p_bs, int p_as) { body_shape=p_bs; area_shape=p_as; }
    };

    struct BodyState {

        int rc;
        bool in_tree;
        VSet<ShapePair> shapes;
    };

    Map<ObjectID,BodyState> body_map;



    void _area_inout(int p_status,const RID& p_area, int p_instance, int p_area_shape,int p_self_shape);

    void _area_enter_tree(ObjectID p_id);
    void _area_exit_tree(ObjectID p_id);

    struct AreaShapePair {

        int area_shape;
        int self_shape;
        bool operator<(const AreaShapePair& p_sp) const {
            if (area_shape==p_sp.area_shape)
                return self_shape < p_sp.self_shape;
            else
                return area_shape < p_sp.area_shape;
        }

        AreaShapePair() {}
        AreaShapePair(int p_bs, int p_as) { area_shape=p_bs; self_shape=p_as; }
    };

    struct AreaState {

        int rc;
        bool in_tree;
        VSet<AreaShapePair> shapes;
    };

    Map<ObjectID,AreaState> area_map;
    void _clear_monitoring();


protected:

    void _notification(int p_what);
    static void _bind_methods();
public:

    void set_space_override_mode(SpaceOverride p_mode);
    SpaceOverride get_space_override_mode() const;

    void set_gravity_is_point(bool p_enabled);
    bool is_gravity_a_point() const;

    void set_gravity_distance_scale(real_t p_scale);
    real_t get_gravity_distance_scale() const;

    void set_gravity_vector(const Vector2& p_vec);
    Vector2 get_gravity_vector() const;

    void set_gravity(real_t p_gravity);
    real_t get_gravity() const;

    void set_linear_damp(real_t p_linear_damp);
    real_t get_linear_damp() const;

    void set_angular_damp(real_t p_angular_damp);
    real_t get_angular_damp() const;

    void set_priority(real_t p_priority);
    real_t get_priority() const;

    void set_enable_monitoring(bool p_enable);
    bool is_monitoring_enabled() const;

    void set_monitorable(bool p_enable);
    bool is_monitorable() const;

    void set_collision_mask(uint32_t p_mask);
    uint32_t get_collision_mask() const;

    void set_layer_mask(uint32_t p_mask);
    uint32_t get_layer_mask() const;

    void set_collision_mask_bit(int p_bit, bool p_value);
    bool get_collision_mask_bit(int p_bit) const;

    void set_layer_mask_bit(int p_bit, bool p_value);
    bool get_layer_mask_bit(int p_bit) const;

    Array get_overlapping_bodies() const; //function for script
    Array get_overlapping_areas() const; //function for script

    bool overlaps_area(Node* p_area) const;
    bool overlaps_body(Node* p_body) const;

    Area2D();
    ~Area2D();
};

VARIANT_ENUM_CAST(Area2D::SpaceOverride);

#endif // AREA_2D_H