crown-engine/engine/Unit.h

/*
Copyright (c) 2013 Daniele Bartolini, Michele Rossi
Copyright (c) 2012 Daniele Bartolini, Simone Boscaratto

Permission is hereby granted, free of charge, to any person
obtaining a copy of this software and associated documentation
files (the "Software"), to deal in the Software without
restriction, including without limitation the rights to use,
copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the
Software is furnished to do so, subject to the following
conditions:

The above copyright notice and this permission notice shall be
included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
OTHER DEALINGS IN THE SOFTWARE.
*/

#pragma once

#include "Vector3.h"
#include "Quaternion.h"
#include "Matrix4x4.h"
#include "Hash.h"
#include "IdTable.h"
#include "SceneGraph.h"
#include "StringUtils.h"

namespace crown
{

typedef Id CameraId;
typedef	Id ComponentId;
typedef Id UnitId;

//-----------------------------------------------------------------------------
struct ComponentType
{
	enum Enum
	{
		UNKNOWN,
		CAMERA,
		MESH,
		SPRITE,
		SOUND
	};
};

struct Component
{
	uint32_t name;
	Id component;
};

typedef Id UnitId;
typedef Id MeshId;
typedef Id SpriteId;

class Camera;
class Mesh;
class Sprite;
class World;
struct UnitResource;

#define MAX_CAMERA_COMPONENTS 8
#define MAX_MESH_COMPONENTS 8
#define MAX_SPRITE_COMPONENTS 8

struct Unit
{
					Unit();
	void			create(World& world, UnitResource* ur, UnitId id, const Vector3& pos, const Quaternion& rot);
	void			destroy();

	Vector3			local_position(int32_t node = 0) const;
	Quaternion		local_rotation(int32_t node = 0) const;
	Matrix4x4		local_pose(int32_t node = 0) const;

	Vector3			world_position(int32_t node = 0) const;
	Quaternion		world_rotation(int32_t node = 0) const;
	Matrix4x4		world_pose(int32_t node = 0) const;

	void			set_local_position(const Vector3& pos, int32_t node = 0);
	void			set_local_rotation(const Quaternion& rot, int32_t node = 0);
	void			set_local_pose(const Matrix4x4& pose, int32_t node = 0);

	void			link_node(int32_t child, int32_t parent);
	void			unlink_node(int32_t child);

	void			add_component(uint32_t name, Id component, uint32_t& size, Component* array);
	Id				find_component(const char* name, uint32_t size, Component* array);
	Id				find_component(uint32_t index, uint32_t size, Component* array);

	void			add_camera(uint32_t name, CameraId camera);
	void			add_mesh(uint32_t name, MeshId mesh);
	void			add_sprite(uint32_t name, SpriteId sprite);

	Camera*			camera(const char* name);
	Camera*			camera(uint32_t i);

	Mesh*			mesh(const char* name);
	Mesh*			mesh(uint32_t i);

	Sprite*			sprite(const char* name);
	Sprite*			sprite(uint32_t i);

public:

	World*			m_world;
	UnitResource*	m_resource;
	UnitId			m_id;

	int32_t			m_root_node;
	SceneGraph		m_scene_graph;

	uint32_t		m_num_cameras;
	Component		m_cameras[MAX_CAMERA_COMPONENTS];

	uint32_t		m_num_meshes;
	Component		m_meshes[MAX_MESH_COMPONENTS];

	uint32_t		m_num_sprites;
	Component		m_sprites[MAX_SPRITE_COMPONENTS];
};

} // namespace crown