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main.cpp
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main.cpp
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#include <vector>
#include <cmath>
#include <SFML/Graphics.hpp>
#include <iostream>
#include "utils.h"
#include "boid.h"
#include "params.h"
#include "slider.h"
void update(std::vector<Boid>& flock) {
for(size_t i = 0; i < flock.size(); ++i) {
flock[i].edges();
flock[i].flock(flock);
flock[i].update();
}
}
void render(sf::RenderWindow& window, sf::Sprite& background, std::vector<Boid>& flock, std::vector<sf::CircleShape>& fishes, std::vector<Slider>& sliders, std::vector<sf::Text>& texts) {
// Clear the window
window.clear(sf::Color::Blue);
window.draw(background);
for(int i = 0; i < Config::NUM_BOIDS; ++i) {
float angle = std::atan2(flock[i].getVelocity().second, flock[i].getVelocity().first) * 180.0f / M_PI;
fishes[i].setPosition(flock.at(i).getPosition().first, flock.at(i).getPosition().second);
fishes[i].setRotation(angle);
window.draw(fishes[i]);
}
for(size_t i = 0; i < sliders.size(); ++i)
sliders[i].draw(window);
for(size_t i = 0; i < texts.size(); ++i)
window.draw(texts[i]);
window.display();
}
int main() {
const sf::Time TimePerFrame = sf::seconds(1.0f / Config::FPS);
sf::Texture texture;
if(!texture.loadFromFile("./resources/images/fish.png")) {
std::cout << "Error loading fish image!" << std::endl;
}
sf::Texture backgroundTexture;
if(!backgroundTexture.loadFromFile("./resources/images/sea.jpg")) {
std::cout << "Error loading background image!" << std::endl;
}
sf::Sprite backgroundImage(backgroundTexture);
sf::Font font;
if(!font.loadFromFile("./resources/fonts/arial/arial_bold.ttf")) {
std::cout << "Error loading font!" << std::endl;
}
// Initialise boids
std::vector<Boid> flock;
std::vector<sf::CircleShape> fishes;
std::vector<Slider> sliders;
std::vector<sf::Text> texts;
initialise_boids(flock);
initialise_fishes(fishes, texture);
initialise_sliders(flock, sliders);
initialise_texts(font, texts);
sf::RenderWindow window(sf::VideoMode(Config::WINDOW_WIDTH, Config::WINDOW_HEIGHT), "Boids Simulation by Ignacio Belitzky");
sf::Clock clock;
sf::Time elapsedTime = sf::Time::Zero;
sf::Vector2u windowSize = window.getSize();
float scaleX = static_cast<float>(windowSize.x) / backgroundTexture.getSize().x;
float scaleY = static_cast<float>(windowSize.y) / backgroundTexture.getSize().y;
backgroundImage.setScale(scaleX, scaleY);
while(window.isOpen()) {
sf::Event event;
while(window.pollEvent(event)) {
if(event.type == sf::Event::Closed)
window.close();
for(size_t i = 0; i < sliders.size(); ++i)
sliders[i].handleEvent(event);
}
// Calculate elapsed time since the las frame
sf::Time deltaTime = clock.restart();
elapsedTime += deltaTime;
while(elapsedTime >= TimePerFrame) {
elapsedTime -= TimePerFrame;
update(flock);
}
// Render at every iteration
render(window, backgroundImage, flock, fishes, sliders, texts);
}
return 0;
}