Entity.cpp

#include <SFML/Graphics.hpp>
#include <cmath>
#include "Entity.h"

Entity::Entity() : Entity(0, sf::Vector2(0.f, 0.f), sf::Color::Cyan, 0, sf::Vector2(0.f, 0.f), false) {}

Entity::Entity(int r, sf::Vector2f position, sf::Color color, float speed,
               sf::Vector2f destination, bool isPlayer)
    : speed(speed), destination(destination), isPlayer(isPlayer), isDestroyed(false)
{
    body = new sf::CircleShape();
    body->setRadius(r);
    body->setPosition(position);
    body->setFillColor(color);
    // Might not be needed
    body->setOrigin(r / 2, r / 2);
}

Entity::Entity(const Entity &entity)
    : speed(entity.speed), destination(entity.destination), isPlayer(entity.isPlayer), isDestroyed(entity.isDestroyed)
{
    body = new sf::CircleShape(*entity.body);
}

void Entity::move()
{
    // Creates a vector movement in the direction of destination
    sf::Vector2f movement = destination - body->getPosition();
    // Finds the length of the vector
    float length = std::sqrt(movement.x * movement.x + movement.y * movement.y);
    // Divide by length to normalise the length of the vector to 1
    if (length != 0)
        movement /= length;
    // Multiply by speed
    movement *= speed;
    // Moves the entity only if it is further away from its destination then half the speed. This value can be tweaked
    if (length > speed / 2)
    {
        body->move(movement);
    }
}

bool Entity::checkCollision(Entity *entity)
{
    // Check if the entity is not null and if it is not the same player type
    if (entity != nullptr && (entity->isPlayer != this->isPlayer))
    {
        // Calculate the distance between the two entities
        sf::Vector2f relativePosition = body->getPosition() - entity->body->getPosition();
        float distance = std::sqrt((relativePosition.x * relativePosition.x) + (relativePosition.y * relativePosition.y));
        // Return true if the distance is less than the sum of their radii
        return (distance < body->getRadius() + entity->body->getRadius());
    }
    else
    {
        return false;
    }
}

void Entity::draw(sf::RenderWindow *win)
{
    win->draw(*body);
}

sf::Vector2f Entity::getPosition()
{
    return body->getPosition();
}

sf::Vector2f Entity::getDestination()
{
    return destination;
}

float Entity::getSpeed()
{
    return speed;
}

bool Entity::getIsDestroyed() { return isDestroyed; }

Entity::~Entity() { delete body; }