Projectile.cpp

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#include "Projectile.h"
#include "Level.h"
 
Texture *Projectile::s_pTexture = nullptr;
 
Projectile::Projectile()
{
    SetDirection(-Vector2::UNIT_Y);
    SetCollisionRadius(9);
}
 
void Projectile::Update(const GameTime& gameTime)
{
    if (IsActive())
    {
        Vector2 translation = m_direction * m_speed * gameTime.GetElapsedTime();
        TranslatePosition(translation);
 
        Vector2 position = GetPosition();
        Vector2 size = s_pTexture->GetSize();
 
        // Is the projectile off the screen?
        if (position.Y < -size.Y) Deactivate();
        else if (position.X < -size.X) Deactivate();
        else if (position.Y > Game::GetScreenHeight() + size.Y) Deactivate();
        else if (position.X > Game::GetScreenWidth() + size.X) Deactivate();
    }
 
    GameObject::Update(gameTime);
}
 
void Projectile::Draw(SpriteBatch& spriteBatch)
{
    if (IsActive())
    {
        const float alpha = GetCurrentLevel()->GetAlpha();
        spriteBatch.Draw(s_pTexture, GetPosition(), Color::White * alpha, s_pTexture->GetCenter());
    }
}
 
void Projectile::Activate(const Vector2 &position, bool wasShotByPlayer)
{
    m_wasShotByPlayer = wasShotByPlayer;
    SetPosition(position);
 
    GameObject::Activate();
}
 
std::string Projectile::ToString() const
{
    return std::string((WasShotByPlayer()) ? "Player" : "Enemy").append(" Projectile");
}
 
CollisionType Projectile::GetCollisionType() const
{
    CollisionType shipType = WasShotByPlayer() ? CollisionType::Player : CollisionType::Enemy;
    return (shipType | GetProjectileType());
}