height_map_data.h

#ifndef HEIGHT_MAP_DATA_H
#define HEIGHT_MAP_DATA_H

#include <core/color.h>
#include <core/math/vector3.h>
#include <core/resource.h>
#include <core/io/resource_loader.h>
#include <core/io/resource_saver.h>
#include <core/dictionary.h>

#include "grid.h"

class HeightMapData : public Resource {
    GDCLASS(HeightMapData, Resource)
public:
    enum { TEXTURE_INDEX_COUNT = 4 };

    enum Channel {
        CHANNEL_HEIGHT = 0,
        CHANNEL_NORMAL,
        CHANNEL_COLOR,
        CHANNEL_TEXTURE_WEIGHT,
        CHANNEL_TEXTURE_INDEX,
        CHANNEL_COUNT
    };

    static const char *SIGNAL_RESOLUTION_CHANGED;
    static const char *SIGNAL_REGION_CHANGED;

    HeightMapData();

    void load_default();

    void set_resolution(int p_res);
    int get_resolution() const;

    void update_all_normals();
    void update_normals(Point2i min, Point2i size);

    void notify_region_change(Point2i min, Point2i max);

    // Public for convenience.
    // Do not attempt to resize them!
    Grid2D<float> heights;
    Grid2D<Vector3> normals;
    Grid2D<Color> colors;
    Grid2D<float> texture_weights[TEXTURE_INDEX_COUNT];
    Grid2D<char> texture_indices[TEXTURE_INDEX_COUNT];

#ifdef TOOLS_ENABLED
    bool _disable_apply_undo;
#endif

private:

#ifdef TOOLS_ENABLED
    void _apply_undo(Dictionary undo_data);
#endif

private:
    static void _bind_methods();
};


class HeightMapDataSaver : public ResourceFormatSaver {
public:
    Error save(const String &p_path, const Ref<Resource> &p_resource, uint32_t p_flags);
    bool recognize(const Ref<Resource> &p_resource) const;
    void get_recognized_extensions(const Ref<Resource> &p_resource, List<String> *p_extensions) const;
};


class HeightMapDataLoader : public ResourceFormatLoader {
public:
    Ref<Resource> load(const String &p_path, const String &p_original_path, Error *r_error);
    void get_recognized_extensions(List<String> *p_extensions) const;
    bool handles_type(const String &p_type) const;
    String get_resource_type(const String &p_path) const;
};


#endif // HEIGHT_MAP_DATA_H