/*************************************************************************/
/*  multimesh.h                                                          */
/*************************************************************************/
/*                       This file is part of:                           */
/*                           GODOT ENGINE                                */
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/* Copyright (c) 2007-2020 Juan Linietsky, Ariel Manzur.                 */
/* Copyright (c) 2014-2020 Godot Engine contributors (cf. AUTHORS.md).   */
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/*************************************************************************/

#ifndef MULTIMESH_H
#define MULTIMESH_H

#include "scene/resources/mesh.h"
#include "servers/visual_server.h"

class MultiMesh : public Resource {

	GDCLASS(MultiMesh, Resource);
	RES_BASE_EXTENSION("multimesh");

public:
	enum TransformFormat {
		TRANSFORM_2D = VS::MULTIMESH_TRANSFORM_2D,
		TRANSFORM_3D = VS::MULTIMESH_TRANSFORM_3D
	};

	enum ColorFormat {
		COLOR_NONE = VS::MULTIMESH_COLOR_NONE,
		COLOR_8BIT = VS::MULTIMESH_COLOR_8BIT,
		COLOR_FLOAT = VS::MULTIMESH_COLOR_FLOAT,
	};

	enum CustomDataFormat {
		CUSTOM_DATA_NONE,
		CUSTOM_DATA_8BIT,
		CUSTOM_DATA_FLOAT,
	};

private:
	Ref<Mesh> mesh;
	RID multimesh;
	TransformFormat transform_format;
	ColorFormat color_format;
	CustomDataFormat custom_data_format;
	int instance_count;
	int visible_instance_count;

protected:
	static void _bind_methods();

	void _set_transform_array(const PoolVector<Vector3> &p_array);
	PoolVector<Vector3> _get_transform_array() const;

	void _set_transform_2d_array(const PoolVector<Vector2> &p_array);
	PoolVector<Vector2> _get_transform_2d_array() const;

	void _set_color_array(const PoolVector<Color> &p_array);
	PoolVector<Color> _get_color_array() const;

	void _set_custom_data_array(const PoolVector<Color> &p_array);
	PoolVector<Color> _get_custom_data_array() const;

public:
	void set_mesh(const Ref<Mesh> &p_mesh);
	Ref<Mesh> get_mesh() const;

	void set_color_format(ColorFormat p_color_format);
	ColorFormat get_color_format() const;

	void set_custom_data_format(CustomDataFormat p_custom_data_format);
	CustomDataFormat get_custom_data_format() const;

	void set_transform_format(TransformFormat p_transform_format);
	TransformFormat get_transform_format() const;

	void set_instance_count(int p_count);
	int get_instance_count() const;

	void set_visible_instance_count(int p_count);
	int get_visible_instance_count() const;

	void set_instance_transform(int p_instance, const Transform &p_transform);
	void set_instance_transform_2d(int p_instance, const Transform2D &p_transform);
	Transform get_instance_transform(int p_instance) const;
	Transform2D get_instance_transform_2d(int p_instance) const;

	void set_instance_color(int p_instance, const Color &p_color);
	Color get_instance_color(int p_instance) const;

	void set_instance_custom_data(int p_instance, const Color &p_custom_data);
	Color get_instance_custom_data(int p_instance) const;

	void set_as_bulk_array(const PoolVector<float> &p_array);

	virtual AABB get_aabb() const;

	virtual RID get_rid() const;

	MultiMesh();
	~MultiMesh();
};

VARIANT_ENUM_CAST(MultiMesh::TransformFormat);
VARIANT_ENUM_CAST(MultiMesh::ColorFormat);
VARIANT_ENUM_CAST(MultiMesh::CustomDataFormat);

#endif // MULTI_MESH_H
