blob: 7435737c0fd6199ffe9bfe5bdcc3dc9f09b383d0 (
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
|
#include "Physics/particlebody.hpp"
#include <iostream>
#include <cmath>
namespace yage
{
ParticleBody::ParticleBody(const Vector2d &position,
double mass,
const Vector2d &velocity,
bool gravity) :
Body(position, mass, velocity, gravity)
{}
void ParticleBody::applyForce(const Vector2d &force)
{
force_+=force;
}
void ParticleBody::update()
{
// set the time_step for 60fps
double time_step=1.0/60.0;
// set the last acceleration
Vector2d last_acceleration=acceleration_;
// update the position of the body
position_+=velocity_*time_step+(0.5*last_acceleration*std::pow(time_step, 2));
// update the acceleration
if(gravity_)
acceleration_=Vector2d(force_.x()/mass_, (GRAVITY+force_.y())/mass_);
else
acceleration_=Vector2d(force_.x()/mass_, force_.y()/mass_);
std::cout<<acceleration_<<"\n";
Vector2d avg_acceleration=(acceleration_+last_acceleration)/2.0;
// update the velocity of the body
velocity_=avg_acceleration*time_step;
}
} // yage
|
