Messages

1

Graphics / Creating an image

« on: June 24, 2011, 09:20:59 am »

Hello, I'm creating a platform game, and i've got everything working so far, but rendering the map is incredibly inefficient. I was wondering how I could speed things up, or just create an image and load that, instead of displaying every piece of the map every single time.

Code: [Select]

void InitBox(int x, int y, int Size,sf::Color Color)
{
Box.AddPoint(0, 0, Color,Color);
Box.AddPoint(Size, 0,Color,Color);
Box.AddPoint(Size, Size,Color,Color);
Box.AddPoint(0, Size,Color,Color);
Box.SetCenter(0,0);
Box.SetPosition(x,y);
Window.Draw(Box);
}


That's the function that I call to display each tile. What can I do to make my game more playable?[/code]

2

General / Obstacles

« on: June 15, 2011, 10:45:57 pm »

Without using GetPixel (Because it is awfully slow and I don't think I'm getting the right DC to the window), what's the best method to implement obstacles / multiple objects?

Thanks in advance

3

General / Laggy / Slowness with hotkeys. / Multiple Hotkeys

« on: June 12, 2011, 05:24:45 pm »

Yeah I realized that after messing around with the code, thanks! I also limit framerate to 60.

4

General / Collision Detection Function Doing Weird Things

« on: June 12, 2011, 04:03:14 am »

x1,y1,x2,y2 being the sprite's centers.

5

General / Collision Detection Function Doing Weird Things

« on: June 12, 2011, 04:02:52 am »

If you have multiple objects, why not just use distance formula?

Code: [Select]


bool cool(x1,y1,x2,y2)
{
  int distance = sqrt(pow((x1-x2),2) + pow((y1-y2),2));
  if distance < 1
     return true
  return false
}


6

General / Laggy / Slowness with hotkeys. / Multiple Hotkeys

« on: June 12, 2011, 12:58:22 am »

I have a couple questions / problems, that I'd love if you guys could help.

a) How would I implement multiple hot keys at once? ex. I can be going left and jumping at the same time without lag / freezing.

b) When moving my sprite, I find that there is a lag before it starts to actually move. How can I fix this?

My code is as follows:

Code: [Select]



#include <SFML/Graphics.hpp>
int pX,pY,Speed = 6;
sf::Event Event;
sf::Sprite Box;
HWND hwnd;
int main()
{
hwnd = FindWindow("Test",NULL);
ShowWindow(hwnd,SW_HIDE);
sf::RenderWindow fa(sf::VideoMode(800,600,256),"Test");
sf::Image image;

if(!image.LoadFromFile("res/Box1.png"))
return EXIT_FAILURE;
Box.SetImage(image);
pY = fa.GetHeight() - (image.GetHeight());
pX = fa.GetWidth() / 2;
while(fa.IsOpened())
{
Box.SetPosition(pX,pY);

while(fa.GetEvent(Event))
{
if (fa.GetInput().IsKeyDown(sf::Key::Left))  pX -= Speed;
if (fa.GetInput().IsKeyDown(sf::Key::Right)) pX += Speed;
if(Event.Type == sf::Event::Closed)
fa.Close();
if(pX > fa.GetWidth()) pX = 0;
}
sf::Image bg;
if(!bg.LoadFromFile("res/background.png"))
return EXIT_FAILURE;
sf::Sprite BG;
BG.SetImage(bg);
BG.SetPosition(0,0);
fa.Clear();
fa.Draw(BG);
fa.Draw(Box);
fa.Display();
}

return 0;
}
[/code]