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
|
#include "bullets.h"
#include "game.h"
Bullet createBulletFromEntity(Entity entity, float damage) {
return (Bullet){
.ray = (Ray){
entity.position,
Vector3RotateByQuaternion((Vector3){0.0, 0.0, 1.0}, entity.rotation)
},
.fromId = entity.id,
.fromFingerprint = entity.fingerprint,
.damage = damage
};
}
BulletHitInfo handleBulletHit(Entity * entity, Bullet bullet) {
// Handle health.
entity->health -= bullet.damage;
entity->health = Clamp(entity->health, ENTITY_MIN_HEALTH, ENTITY_MAX_HEALTH);
// Check hit info.
BulletHitInfo hitInfo = (BulletHitInfo){
.hit = true,
.killed = entity->health == 0.0,
.hitId = entity->id,
.hitFingerprint = entity->fingerprint
};
return hitInfo;
}
BulletHitInfo shootBullet(World * world, Bullet bullet) {
int i, j;
RayCollision collision;
Entity * currentEntity;
Ray ray;
// Set direction.
ray.direction = bullet.ray.direction;
// Stores all the hits so we can find closest one.
int hits[world->entitiesCount];
size_t hitsSize = 0;
// Loop through entities.
for (i = 0; i < world->entitiesCount; ++i) {
currentEntity = &world->entities[i];
// This was the entity that shot it.
if (currentEntity->fingerprint == bullet.fromFingerprint)
continue;
else if (currentEntity->model == NULL) // Null model indeed.
continue;
// Set position relative to entity.
ray.position = Vector3Subtract(bullet.ray.position, currentEntity->position);
// Loop through meshes.
for (j = 0; j < currentEntity->model->meshCount; ++j) {
collision = GetRayCollisionMesh(
ray,
currentEntity->model->meshes[j],
currentEntity->model->transform
);
// Did hit.
if (collision.hit) {
hits[hitsSize] = i;
++hitsSize;
break;
}
}
}
// No hits.
if (hitsSize == 0)
return (BulletHitInfo){
.hit = false,
.killed = false,
.hitId = ENTITY_NONE,
};
float dis = Vector3Distance(world->entities[hits[0]].position, bullet.ray.position);
float closest = dis;
int closestNum = 0;
// Find closest.
for (i = 0; i < hitsSize; ++i) {
dis = Vector3Distance(world->entities[hits[i]].position, bullet.ray.position);
// This fucker is closer.
if (dis < closest) {
closest = dis;
closestNum = i;
}
}
// Handle closest bullet.
return handleBulletHit(&world->entities[hits[closestNum]], bullet);
}
|
