1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
|
#pragma once
#include <memory>
#include <typeindex>
#include <unordered_map>
#include <vector>
#include "Component.h"
#include "types.h"
namespace crepe {
class GameObject;
/**
* \brief Manages all components
*
* This class manages all components. It provides methods to add, delete and get components.
*/
class ComponentManager {
// TODO: This relation should be removed! I (loek) believe that the scene manager should
// create/destroy components because the GameObject's are stored in concrete Scene classes,
// which will in turn call GameObject's destructor, which will in turn call
// ComponentManager::delete_components_by_id or something. This is a pretty major change, so
// here is a comment and temporary fix instead :tada:
friend class SceneManager;
public:
ComponentManager(); // dbg_trace
~ComponentManager(); // dbg_trace
/**
* \brief Create a new game object using the component manager
*
* \param name Metadata::name (required)
* \param tag Metadata::tag (optional, empty by default)
* \param position Transform::position (optional, origin by default)
* \param rotation Transform::rotation (optional, 0 by default)
* \param scale Transform::scale (optional, 1 by default)
*
* \returns GameObject interface
*
* \note This method automatically assigns a new entity ID
*/
GameObject new_object(const std::string & name, const std::string & tag = "",
const vec2 & position = {0, 0}, double rotation = 0,
double scale = 1);
protected:
/**
* GameObject is used as an interface to add/remove components, and the game programmer is
* supposed to use it instead of interfacing with the component manager directly.
*/
friend class GameObject;
/**
* \brief Add a component to the ComponentManager
*
* This method adds a component to the ComponentManager. The component is created with the
* given arguments and added to the ComponentManager.
*
* \tparam T The type of the component
* \tparam Args The types of the arguments
* \param id The id of the GameObject this component belongs to
* \param args The arguments to create the component
* \return The created component
*/
template <typename T, typename... Args>
T & add_component(game_object_id_t id, Args &&... args);
/**
* \brief Delete all components of a specific type and id
*
* This method deletes all components of a specific type and id.
*
* \tparam T The type of the component
* \param id The id of the GameObject this component belongs to
*/
template <typename T>
void delete_components_by_id(game_object_id_t id);
/**
* \brief Delete all components of a specific type
*
* This method deletes all components of a specific type.
*
* \tparam T The type of the component
*/
template <typename T>
void delete_components();
/**
* \brief Delete all components of a specific id
*
* This method deletes all components of a specific id.
*
* \param id The id of the GameObject this component belongs to
*/
void delete_all_components_of_id(game_object_id_t id);
/**
* \brief Delete all components
*
* This method deletes all components.
*/
void delete_all_components();
/**
* \brief Set a GameObject as persistent
*
* This method sets a GameObject as persistent. If a GameObject is persistent, its
* components will not be deleted.
*
* \param id The id of the GameObject to set as persistent
*/
void set_persistent(game_object_id_t id);
public:
/**
* \brief Get all components of a specific type and id
*
* This method gets all components of a specific type and id.
*
* \tparam T The type of the component
* \param id The id of the GameObject this component belongs to
* \return A vector of all components of the specific type and id
*/
template <typename T>
RefVector<T> get_components_by_id(game_object_id_t id) const;
/**
* \brief Get all components of a specific type
*
* This method gets all components of a specific type.
*
* \tparam T The type of the component
* \return A vector of all components of the specific type
*/
template <typename T>
RefVector<T> get_components_by_type() const;
private:
/**
* \brief The components
*
* This unordered_map stores all components. The key is the type of the component and the
* value is a vector of vectors of unique pointers to the components.
*
* Every component type has its own vector of vectors of unique pointers to the components.
* The first vector is for the ids of the GameObjects and the second vector is for the
* components (because a GameObject might have multiple components).
*/
std::unordered_map<std::type_index, std::vector<std::vector<std::unique_ptr<Component>>>>
components;
//! Persistent flag for each GameObject
std::vector<bool> persistent = {false};
//! ID of next GameObject allocated by \c ComponentManager::new_object
game_object_id_t next_id = 0;
};
} // namespace crepe
#include "ComponentManager.hpp"
|