Render FPS in a static text.

[alfabeta90]

I wanted to show a fps in a static text.

Code: Select all

    while(device->run())
    { 
        driver->beginScene(true, true, SColor(0,192,192,192));
                smgr->drawAll();
                guienv->drawAll();
	    driver->endScene();

		int fps = driver->getFPS();
		core::stringw str = L"FPS: ";     
		str += fps;     
		guienv->addStaticText(str.c_str(), rect<s32>(35,35,140,50), false, false, 0);
	}

But if i run program i see: "FPS: " and then a black little somthing. I think that are fps number whos are rendered on previous fps number. Any help?

[Dorth]

you have to either use a string buffer then throw in it the numbers with the << operator or use something like itoa to convert them to text. Right now the value you give it is not something a string recognizes...

[vitek]

You only need to call addStaticText() once. After that you need to use setText(). Otherwise you're creating a new static text over the top of the old one every frame.

Code: Select all

IGUIStaticText* fpsTextElement = guienv->addStaticText(L"", rect<s32>(35, 35, 140, 50), false, false, 0);

int lastFPS = 0;

while (device->run())
{
  if (driver->beginScene(true, true, SColor(0,192,192,192)))
  {
    smgr->drawAll(); 
    guienv->drawAll(); 

    driver->endScene(); 
  }

  // only update fps display if fps changed
  int fps = driver->getFPS(); 
  if (lastFPS != fps)
  {
    core::stringw str = L"FPS: ";      
    str += fps;      
    fpsTextElement->setText(str.c_str());

    lastFPS = fps;
  }
}

Travis

[alfabeta90]

I do so:

Code: Select all

	IGUIFont* font = device->getGUIEnvironment()->getFont("images/courier.bmp");
	font->draw(buffer,rect<s32>(10,10,300,60),SColor(255,255,255,255));

What must i do to show fps because font has no methos lik setText?

[Dances]

I do so:

Code: Select all

	IGUIFont* font = device->getGUIEnvironment()->getFont("images/courier.bmp");
	font->draw(buffer,rect<s32>(10,10,300,60),SColor(255,255,255,255));

What must i do to show fps because font has no methos lik setText?

When you use addStaticText the first time you'll get a pointer to an IStaticText... or something like that... you should probably check the API.

Anyway, when you've got that you use setText on that pointer.

[vitek]

If you insist on using drawText() you need to change the text that you draw...

Code: Select all

IGUIFont* font = device->getGUIEnvironment()->getFont("images/courier.bmp"); 

int lastFPS = 0; 

while (device->run()) 
{ 
  if (driver->beginScene(true, true, SColor(0,192,192,192))) 
  { 
    smgr->drawAll(); 
    guienv->drawAll(); 

    driver->endScene(); 
  } 

  // only update fps display if fps changed 
  int fps = driver->getFPS(); 
  if (font && (lastFPS != fps)) 
  { 
    core::stringw str = L"FPS: ";      
    str += fps;      

    font->draw(str.c_str(), rect<s32>(10,10,300,60), video::SColor(255,255,255,255)); 

    lastFPS = fps; 
  } 
} 

I don't know why you'd want to do that though. The IGUIStaticText does exactly the same thing, the only diference is that it creates a GUI element to hold the state.

Travis