我在使用SFML在C++中製作小行星遊戲。雖然射擊子彈似乎有問題。雖然每次擊中子彈時班級似乎都能正常工作,但遊戲速度顯着下降。這是宇宙飛船和子彈的代碼。我似乎無法找到它的問題!感謝您的時間。當射擊項目符號時SFML遊戲速度減慢
這是這艘船的代碼:
#include "Spaceship.h"
Spaceship::Spaceship(void){}
Spaceship::~Spaceship(void){}
void Spaceship::LoadResources()
{
if(!shipAnimImg.LoadFromFile("Resources/Images/SpaceshipAnimation.png"))
std::cout <<"Could not locate the ship animation image" <<std::endl;
if(!shipIdleImg.LoadFromFile("Resources/Images/SpaceshipIdle.png"))
std::cout <<"Could not locate the ship idle image" <<std::endl;
if(!bulletImg.LoadFromFile("Resources/Images/Bullet.png"))
std::cout <<"Could not locate the bullet image" <<std::endl;
shipSpr.SetImage(shipIdleImg);
shipSpr.SetScale(0.5,0.5);
shipSpr.SetCenter(shipIdleImg.GetWidth()/2,shipIdleImg.GetHeight()/2);
x = DEFAULT_SCREENWIDTH/2;
y = DEFAULT_SCREENHEIGHT/2;
shipSpr.SetPosition(x,y);
shipSpr.SetRotation(90);
std::cout<<shipSpr.GetCenter().x<<std::endl;
std::cout<<shipSpr.GetCenter().y<<std::endl;
vx = 0.2;
vy = 0.2;
isBulletOnScreen = false;
isPressed = false;
}
void Spaceship::UnloadResources(){}
void Spaceship::Update(sf::RenderWindow &Window,sf::Event event)
{
if (Window.GetInput().IsKeyDown(sf::Key::A))
{
shipSpr.Rotate(0.08);
}
if (Window.GetInput().IsKeyDown(sf::Key::D))
{
shipSpr.Rotate(-0.08);
}
if (Window.GetInput().IsKeyDown(sf::Key::W))
{
x += (cos(shipSpr.GetRotation() * (3.14159265/180.0)) *0.2);
y -= (sin(shipSpr.GetRotation() * (3.14159265/180.0)) *0.2);
shipSpr.SetPosition(x,y);
}
if (Window.GetInput().IsKeyDown(sf::Key::Space) && !isPressed)
{
isBulletOnScreen = true;
isPressed = true;
bullets.push_back(new Bullet(shipSpr.GetPosition().x,shipSpr.GetPosition().y,0.3,shipSpr.GetRotation(),bulletImg));
}
if (event.Type == sf::Event::KeyReleased)
{
isPressed = false;
}
if(bullets.size() != 0)
{
for (int i=0; i<bullets.size(); i++)
{
bullets[i]->Update(Window,event);
if ((bullets[i]->GetX() > DEFAULT_SCREENWIDTH + 40) || (bullets[i]->GetX() < 0 - 40) ||
(bullets[i]->GetY() > DEFAULT_SCREENWIDTH + 40) || (bullets[i]->GetY() < 0 - 40))
{
bullets.erase(bullets.begin() +i);
}
}
std::cout<<bullets.size()<<std::endl;
}
std::cout<<bullets.size()<<std::endl;
}
void Spaceship::Draw(sf::RenderWindow &Window)
{
if(isBulletOnScreen)
for (int i=0; i<bullets.size(); i++)
{
Bullet *cur = bullets[i];
bullets[i]->Draw(Window);
std::cout<<bullets.size()<<std::endl;
}
Window.Draw(shipSpr);
}
這是子彈:
#include "Bullet.h"
Bullet::Bullet(void){}
Bullet::Bullet(float x,float y,float v,float r,sf::Image image)
{
LoadResources(x,y,v,r,image);
}
Bullet::~Bullet(void){}
void Bullet::LoadResources(float x,float y,float v,float r , sf::Image image)
{
this->x = x;
this->y = y;
this->v = v;
bulletImg = image;
bulletSpr.SetImage(bulletImg);
bulletSpr.SetScale(0.5,0.5);
bulletSpr.SetCenter(bulletImg.GetWidth()/2,bulletImg.GetHeight()/2);
bulletSpr.SetPosition(x,y);
bulletSpr.SetRotation(r);
}
void Bullet::UnloadResources(){}
void Bullet::Update(sf::RenderWindow &Window,sf::Event event)
{
x += (cos(bulletSpr.GetRotation() * (3.14159265/180.0)) *v);
y -= (sin(bulletSpr.GetRotation() * (3.14159265/180.0)) *v);
bulletSpr.SetPosition(x,y);
}
void Bullet::SetX(float x)
{
this->x = x;
}
void Bullet::SetY(float y)
{
this->y = y;
}
void Bullet::SetRotation(float r)
{
rotation = r;
}
float Bullet::GetX()
{
return x;
}
float Bullet::GetY()
{
return y;
}
void Bullet::Draw(sf::RenderWindow &Window)
{
Window.Draw(bulletSpr);
}
編輯:改變了代碼,以便它加載的飛船類和通行證內的圖像它在創建之後被添加到Bullet的資源。問題仍然保持不變。每次彈出子彈時,遊戲變得越來越慢,並且在被擦除之前它保持緩慢。
它在子彈的持續時間內減速還是僅在被觸發的時刻減速? – 2013-04-24 13:08:26
當屏幕上出現子彈時它會變慢。即使在改變從被加載的子彈的loadfrom文件並僅從宇宙飛船傳入後,我仍然得到相同的減速。當所有子彈從場景中移除時,程序的速度恢復正常。 – user2315574 2013-04-24 13:29:31