Irrlicht Engine

Posted: **Sat Sep 13, 2008 7:47 pm**

Hello guys. My question is simple.
I just wanna load an xml config file through IXMLReader and read few useful parameters like:
- video driver
- screen resolution
- ...others...

I know I need this line of code

Code: Select all

IXMLReader* xml = device->getFileSystem()->createXMLReader("...");

but I can put it only *AFTER* the device creation. But I need it *BEFORE*, as I have to read xml parameters for creating a device. How can I proceed?!

Posted: **Sat Sep 13, 2008 7:53 pm**

I don't use the IXMLReader/Writer (I'm using tinyXML), but you can create a device with the NULL driver (EDT_NULL) first to read the xml file, then drop the device and create a new one with the desired parameters...

Posted: **Sat Sep 13, 2008 8:11 pm**

mmh I will give it a try, thanks

Posted: **Sat Sep 13, 2008 8:45 pm**

This works:

sourcecode:

Code: Select all

// ************ Setup irrlicht device *************** 
	s32 screenWidth, screenHeight;	
	SIrrlichtCreationParameters paramIrr;
  MyEventReceiver receiver;
	paramIrr.EventReceiver = &receiver; 	
	

	IrrXMLReader* xml = createIrrXMLReader("settings.xml");
	while(xml && xml->read())
	{	
		switch(xml->getNodeType())
		{	
			case EXN_ELEMENT:
			{	
				if (!strcmp("settings", xml->getNodeName()))
				{	
					screenWidth          = xml->getAttributeValueAsInt("width");
					screenHeight         = xml->getAttributeValueAsInt("height");
					paramIrr.Fullscreen	 = xml->getAttributeValueAsInt("fullscreen");
					paramIrr.Vsync			 = xml->getAttributeValueAsInt("vsync");
					//TODO: integrate more parameters in XML file
				} 
			}
			break;
		}//switch
	}//while
	delete xml;

	paramIrr.AntiAlias = false;
	paramIrr.Bits = 32;
	paramIrr.DriverType = EDT_DIRECT3D9;
	paramIrr.Stencilbuffer = false;	 
	paramIrr.WindowSize = dimension2d<s32>(screenWidth, screenHeight);

	device = createDeviceEx(paramIrr);
	
	// ************ Setup driver, smgr, guienv *************** 
	IVideoDriver*    driver = device->getVideoDriver();
	ISceneManager*   smgr   = device->getSceneManager();
	guienv = device->getGUIEnvironment();
	device->getCursorControl()->setVisible(true); // mouse cursor

XML file:

Code: Select all

<?xml version="1.0"?>
<config>
<!--This is a config file for the irrlicht engine.-->
<settings width = "1024" height = "768" antialias = "1" fullscreen = "0" vsync = "0">
</settings> 
</config>

Posted: **Sat Sep 13, 2008 10:47 pm**

Yes, Irrlicht 1.4 should have the create XML Reader method exposed even on Windows. So you can use the XML reader even without a device.

Posted: **Sun Sep 14, 2008 1:02 am**

So you can use the XML reader even without a device.

Yes, it definitely works before creating a device.

Posted: **Mon Sep 15, 2008 4:25 am**

ehenkes wrote:
Code: Select all
delete xml;

Should be xml->drop();.

Posted: **Mon Sep 15, 2008 4:33 am**

You can create & destroy a device or use this settings reader

Posted: **Mon Sep 15, 2008 9:57 pm**

Should be xml->drop();

Sorry, there is no member function "drop()".

Posted: **Mon Sep 15, 2008 10:23 pm**

ehenkes wrote:
Should be xml->drop();
Sorry, there is no member function "drop()".

Hmm. It seems like IrrXMLReader should be using IReferenceCounted as a base class (when used within Irrlicht). The documentation seems to assume that it will be. I wonder if there's a reason why it isn't?

Posted: **Mon Sep 15, 2008 10:25 pm**

ehenkes wrote:
Should be xml->drop();
Sorry, there is no member function "drop()". :roll:

Ah, yes. I forget that Irrlicht supports both the IrrXMLReader and IXMLReader types. Only the IXMLReader inherits from IReferenceCounted...

Travis

Posted: **Tue Sep 16, 2008 7:00 am**

Which seems bass ackwards. Deliberate, or snafu?

Posted: **Fri Sep 19, 2008 5:50 pm**

I forget that Irrlicht supports both the IrrXMLReader and IXMLReader types.

Nice feature.

bass ackwards = ass backwards
snafu = situation normal all beyond repair