mpri-graphics-project/Ball.cpp

47 lines
924 B
C++

#include "Ball.hpp"
#include <cmath>
Ball::Ball(Point& _center, double _p, double _q) :
Center(_center),
surface(_center, _p, _q),
init_h(_center.z),
bounce_number(0),
crt_time(0),
A(_center.z),
B(0),
U(sqrt(2 * G_CTE * _center.z)),
T(0)
{
}
void Ball::_compute_pos() {
Center.x = A + B * crt_time - (G_CTE / 2) * crt_time * crt_time;
surface.update_center_pos(Center);
}
void Ball::_compute_T_n() {
double swap = T;
T = swap + 2/G_CTE * pow(1/2, bounce_number - 2) * sqrt(2 * init_h / G_CTE);
}
void Ball::_compute_B_n() {
B = G_CTE * T + U;
}
void Ball::_compute_A_n() {
A = - G_CTE * T * T / 2 - (U * T);
}
void Ball::_compute_U_n() {
U *= 1/2;
}
void Ball::update_pos(double dt) {
crt_time += dt;
if (crt_time >= T) {
_compute_T_n();
_compute_U_n();
_compute_A_n();
_compute_B_n();
}
_compute_pos();
}