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
159
160
161
162
163
164
165
166
167
|
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "storage.h"
#include "bitset.h"
enum component_t
{
C_TRANSFORM = (int) 0,
C_COLLIDER,
};
typedef struct
{
int x;
int y;
} transform_t;
void
printTransform(transform_t *t)
{
printf("Transform { .x = %i, .y = %i }\n", t->x, t->y);
}
typedef struct
{
float width;
float height;
int collisionsCount;
} collider_t;
void
sys_collide(storage_t *storage, entity_t eid)
{
printf("Inside collide, id = %i\n", eid);
transform_t *transform = GET_COMPONENT(storage, transform_t, eid);
// collider_t *collider = GET_COMPONENT(storage, collider_t, eid);
printTransform(transform);
printf("\n");
}
void
sys_move(storage_t *storage, entity_t eid)
{
printf("Inside move, id = %i\n", eid);
transform_t *transform = GET_COMPONENT(storage, transform_t, eid);
printTransform(transform);
printf("\n");
}
// Engine functions
void
initStorage(storage_t *storage)
{
storage->componentsStored = 0;
storage->objectsStored = 0;
storage->objects = (component_pair_t *) malloc(MAX_COMPONENTS * sizeof(component_pair_t));
bitarena_init(&storage->objectSignatures, MAX_OBJECTS);
storage->systemsStored = 0;
storage->systems = (system_t *) malloc(4096 * sizeof(system_t));
bitarena_init(&storage->systemSignatures, 4096);
REGISTER_COMPONENT(storage, transform_t);
REGISTER_COMPONENT(storage, collider_t);
}
void
loadScene(storage_t *storage)
{
// bitset_t s1 = bitarena_at(&storage->objectSignatures, 0);
// bitset_t s2 = bitarena_at(&storage->objectSignatures, 1);
// bitset_set(s1, 9);
// bitset_set(s2, 9);
// bitset_print(s1);
// bitset_print(s2);
// bitset_t sAnd = bitset_and(s1, s2);
// printf("Bitset is zero: %i\n", bitset_isZero(sAnd));
// printf("Bitset is equals: %i\n", bitset_equals(s1, s2));
entity_t e1 = createEntity(storage);
ADD_COMPONENT(storage, e1, transform_t);
ADD_COMPONENT(storage, e1, collider_t);
transform_t *t1 = GET_COMPONENT(storage, transform_t, e1);
t1->x = 13;
t1->y = 37;
collider_t *c1 = GET_COMPONENT(storage, collider_t, e1);
c1->height = 50;
c1->width = 50;
c1->collisionsCount = 5;
entity_t e2 = createEntity(storage);
ADD_COMPONENT(storage, e2, transform_t);
transform_t *t2 = GET_COMPONENT(storage, transform_t, e2);
t2->x = 14;
t2->y = 88;
entity_t e3 = createEntity(storage);
ADD_COMPONENT(storage, e3, transform_t);
transform_t *t3 = GET_COMPONENT(storage, transform_t, e3);
t3->x = 123;
t3->y = 456;
entity_t e4 = createEntity(storage);
ADD_COMPONENT(storage, e4, transform_t);
transform_t *t4 = GET_COMPONENT(storage, transform_t, e4);
t4->x = 1212;
t4->y = 1212;
entity_t e5 = createEntity(storage);
ADD_COMPONENT(storage, e5, transform_t);
transform_t *t5 = GET_COMPONENT(storage, transform_t, e5);
t5->x = 777;
t5->y = 666;
{
char *components[] = {"transform_t", "collider_t", NULL};
bitset_t bitset = createSignature(storage, components);
// printf("Collide bitset: ");
// bitset_print(bitset);
registerSystem(storage, sys_collide, bitset);
}
{
char *components[] = {"transform_t", NULL};
bitset_t bitset = createSignature(storage, components);
// printf("Move bitset: ");
// bitset_print(bitset);
registerSystem(storage, sys_move, bitset);
}
}
void
update(storage_t *storage)
{
for (entity_t i = 0; i < storage->objectsStored; ++i)
{
for (int j = 0; j < storage->systemsStored; ++j)
{
bitset_t objBitset = bitarena_at(&storage->objectSignatures, i);
bitset_t sysBitset = bitarena_at(&storage->systemSignatures, j);
bitset_t bitAnd = bitset_and(objBitset, sysBitset);
if (bitset_equals(bitAnd, sysBitset))
{
storage->systems[j](storage, i);
}
}
}
}
int
main()
{
storage_t storage;
initStorage(&storage);
loadScene(&storage);
update(&storage);
return 0;
}
|
