mpri-graphics-project/Ball.hpp
Rémi Oudin 188d43cb50 Better animation
Bounces are slower, final position is the ball undeformed.
Also, moves continuously when it keep staying on the ground.
2018-02-13 10:51:07 +01:00

46 lines
1.5 KiB
C++

/**
* Header file defining a ball.
* A ball is the kind of real object, with a physical model, and the implicit
* surface.
* The physical model is strongly inspired from
* http://www.physics-online.info/book1/chapt1/sect1a/problem1a-12/Problem1A-12.htm,
* apart for the x-axis drift.
* For this one, the assumption done is that the speed is divided by two at
* each bounce, which is a reasonable assumption since it is the same for the
* vertical bounces.
**/
#pragma once
#include <cstddef>
#include "spheroid.hpp"
#define G_CTE 9.81
class Ball {
private:
Point Center;
Spheroid surface;
double radius;
double init_h;
double min_height;
size_t bounce_number;
double crt_time;
double A, B, U, T; // Coefficients for the physical model.
double v_x, v_z;
void _compute_pos(double dt);
void _compute_v_x(Point normal);
void _compute_v_z(Point normal);
void _compute_A_n();
void _compute_B_n();
void _compute_U_n();
void _compute_T_n();
public:
Ball(const Point& _center, double _min_height, double _v_x,
double _v_z, double p, double q);
void update_pos(double dt);
Point getCenter() const {return Center;}
double accessT() const { return T;}
double access_crt_time() const { return crt_time;}
Spheroid* get_surface() { return &surface; }
};
std::ostream& operator << (std::ostream &out, Ball const& data);