blob: bcde43151cf3335922f7b6a94e37fd141100805b (
plain)
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
|
#include <cmath>
#include "../ComponentManager.h"
#include "../api/Config.h"
#include "../api/Rigidbody.h"
#include "../api/Transform.h"
#include "../api/Vector2.h"
#include "PhysicsSystem.h"
using namespace crepe;
void PhysicsSystem::update() {
ComponentManager & mgr = this->component_manager;
RefVector<Rigidbody> rigidbodies = mgr.get_components_by_type<Rigidbody>();
RefVector<Transform> transforms = mgr.get_components_by_type<Transform>();
double gravity = Config::get_instance().physics.gravity;
for (Rigidbody & rigidbody : rigidbodies) {
if (!rigidbody.active) continue;
switch (rigidbody.data.body_type) {
case Rigidbody::BodyType::DYNAMIC:
for (Transform & transform : transforms) {
if (transform.game_object_id == rigidbody.game_object_id) {
// Add gravity
if (rigidbody.data.use_gravity) {
rigidbody.data.linear_velocity.y
+= (rigidbody.data.mass * rigidbody.data.gravity_scale
* gravity);
}
// Add damping
if (rigidbody.data.angular_damping != 0) {
rigidbody.data.angular_velocity *= rigidbody.data.angular_damping;
}
if (rigidbody.data.linear_damping != Vector2{0, 0}) {
rigidbody.data.linear_velocity *= rigidbody.data.linear_damping;
}
// Max velocity check
if (rigidbody.data.angular_velocity
> rigidbody.data.max_angular_velocity) {
rigidbody.data.angular_velocity
= rigidbody.data.max_angular_velocity;
} else if (rigidbody.data.angular_velocity
< -rigidbody.data.max_angular_velocity) {
rigidbody.data.angular_velocity
= -rigidbody.data.max_angular_velocity;
}
if (rigidbody.data.linear_velocity.x
> rigidbody.data.max_linear_velocity.x) {
rigidbody.data.linear_velocity.x
= rigidbody.data.max_linear_velocity.x;
} else if (rigidbody.data.linear_velocity.x
< -rigidbody.data.max_linear_velocity.x) {
rigidbody.data.linear_velocity.x
= -rigidbody.data.max_linear_velocity.x;
}
if (rigidbody.data.linear_velocity.y
> rigidbody.data.max_linear_velocity.y) {
rigidbody.data.linear_velocity.y
= rigidbody.data.max_linear_velocity.y;
} else if (rigidbody.data.linear_velocity.y
< -rigidbody.data.max_linear_velocity.y) {
rigidbody.data.linear_velocity.y
= -rigidbody.data.max_linear_velocity.y;
}
// Move object
if (!rigidbody.data.constraints.rotation) {
transform.rotation += rigidbody.data.angular_velocity;
transform.rotation = std::fmod(transform.rotation, 360.0);
if (transform.rotation < 0) {
transform.rotation += 360.0;
}
}
if (!rigidbody.data.constraints.x) {
transform.position.x += rigidbody.data.linear_velocity.x;
}
if (!rigidbody.data.constraints.y) {
transform.position.y += rigidbody.data.linear_velocity.y;
}
}
}
break;
case Rigidbody::BodyType::KINEMATIC:
break; //(scripts)
case Rigidbody::BodyType::STATIC:
break; //(unmoveable objects)
default:
break;
}
}
}
|