Zombie.cpp

#include "zombie.h"
#include "TextureHolder.h"
#include <cstdlib>
#include <ctime>

using namespace std;

void Zombie::spawn(float startX, float startY, int type, int seed)
{
    switch (type)
    {
    case 0:
        // Bloater
        m_Sprite = Sprite(TextureHolder::GetTexture("graphics/bloater.png"));
        m_Speed = BLOATER_SPEED;
        m_Health = BLOATER_HEALTH;
        break;
    case 1:
        // Chaser
        m_Sprite = Sprite(TextureHolder::GetTexture("graphics/chaser.png"));
        m_Speed = CHASER_SPEED;
        m_Health = CHASER_HEALTH;
        break;
    case 2:
        // Crawler
        m_Sprite = Sprite(TextureHolder::GetTexture("graphics/crawler.png"));
        m_Speed = CRAWLER_SPEED;
        m_Health = CRAWLER_HEALTH;
        break;
    }

    // Modify the speed to make the zombie unique
    // Every zombie is unique. Create a speed modifier
    srand((int)time(0) * seed);

    // Somewhere between 80 and 100
    float modifier = (rand() % MAX_VARRIANCE) + OFFSET;

    // Express this as a fraction of 1
    modifier /= 100; // Now equals between .7 and 1
    m_Speed *= modifier;

    // Initialize its location
    m_Position.x = startX;
    m_Position.y = startY;

    // Set its origin to its center
    m_Sprite.setOrigin(25, 25);

    // Set its position
    m_Sprite.setPosition(m_Position);
}

bool Zombie::hit()
{
    m_Health--;

    if (m_Health < 0)
    {
        // dead
        m_Alive = false;
        m_Sprite.setTexture(TextureHolder::GetTexture("graphics/blood.png"));

        return true;
    }
    // injured but not dead yet
    return false;
}

bool Zombie::isAlive()
{
    return m_Alive;
}

FloatRect Zombie::getPosition()
{
    return m_Sprite.getGlobalBounds();
}

Sprite Zombie::getSprite()
{
    return m_Sprite;
}

void Zombie::update(float elapsedTime, Vector2f playerLocation)
{
    float playerX = playerLocation.x;
    float playerY = playerLocation.y;

    // Update the zombie position variables
    if (playerX > m_Position.x)
    {
        m_Position.x = m_Position.x + m_Speed * elapsedTime;
    }

    if (playerY > m_Position.y)
    {
        m_Position.y = m_Position.y + m_Speed * elapsedTime;
    }

    if (playerX < m_Position.x)
    {
        m_Position.x = m_Position.x - m_Speed * elapsedTime;
    }

    if (playerY < m_Position.y)
    {
        m_Position.y = m_Position.y - m_Speed * elapsedTime;
    }

    // Move the sprite
    m_Sprite.setPosition(m_Position);

    // Face the sprite in the correct direction
    float angle = (atan2(playerY - m_Position.y, playerX - m_Position.x) * 180) / 3.141;

    m_Sprite.setRotation(angle);
}