85 lines
2.1 KiB
C++
85 lines
2.1 KiB
C++
#include "Ball.hpp"
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#include <iostream>
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#include <cmath>
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Ball::Ball(const Point& _center, double _min_height, double _v_x, double _v_z,
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double _p, double _q) :
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Center(_center),
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surface(_center, _min_height, _p, _q),
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init_h(_center.y),
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min_height(_min_height),
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bounce_number(0.0),
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crt_time(0),
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A(_center.y),
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B(0),
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U(sqrt(2 * G_CTE * _center.y)),
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T(sqrt(2.0 * _center.y / G_CTE)),
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v_x(_v_x),
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v_z(_v_z)
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{
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}
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void Ball::_compute_pos(double dt) {
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Center.y = fmax(0.0, A + B * crt_time - (G_CTE / 2) * crt_time * crt_time + min_height);
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Center.x += dt * v_x;
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Center.z += dt * v_z;
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surface.update_center_pos(Center);
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surface.check_horizontal_plan_collision(0.0);
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}
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void Ball::_compute_T_n() {
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double update = (pow(0.5, bounce_number-1) * sqrt(2 * init_h / G_CTE));
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T += update;
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}
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void Ball::_compute_B_n() {
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B = G_CTE * T + U;
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}
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void Ball::_compute_A_n() {
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A = - G_CTE * T * T / 2 - (U * T);
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}
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void Ball::_compute_U_n() {
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U *= 0.5;
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}
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void Ball::_compute_v_x(Point normal) {
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double factor = normal.x / (4*(normal.x + normal.z));
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v_x *= (0.5 + factor);
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}
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void Ball::_compute_v_z(Point normal) {
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double factor = normal.z / (4*(normal.x + normal.z));
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v_z *= (0.5 + factor);
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}
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void Ball::update_pos(double dt) {
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crt_time += dt;
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if (crt_time >= T) {
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Point normal = surface.getNormalVector();
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bounce_number += 1;
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_compute_U_n();
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_compute_A_n();
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_compute_B_n();
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_compute_T_n();
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_compute_v_x(normal);
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_compute_v_z(normal);
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std::cout << "New bounce :";
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std::cout << "U:" << U << ":";
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std::cout << "A:" << A << ":";
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std::cout << "B:" << B << ":";
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std::cout << "T:" << T << "\n";
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}
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_compute_pos(dt);
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}
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std::ostream& operator<< (std::ostream &out, Ball const& data) {
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Point center = data.getCenter();
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out << "t:" << data.access_crt_time() << ":";
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out << "T:" << data.accessT() << ":";
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out << center.x << ':';
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out << center.z << ':';
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out << center.y << ':';
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return out;
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}
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