XML Level loading problems

[JPulham]

I have an XML level like this:

Code: Select all

<level>
    <name>Desert Canyon</name>
    <desc>../models/level01.bmp</desc>
    <skymap>
        <image>../skys/reddesert_top.bmp</image>
        <image>../skys/reddesert_bottom.bmp</image>
        <image>../skys/reddesert_left.bmp</image>
        <image>../skys/reddesert_right.bmp</image>
        <image>../skys/reddesert_front.bmp</image>
        <image>../skys/reddesert_back.bmp</image>
    </skymap>
    <mesh file="../models/level01.3.lmts" type="lmts"></mesh>
</level>

and the reader looks like this

Code: Select all

//setup game data
stringc levelpath;
levelpath = "data\\levels\\";
				    levelpath.append(lstLevel->getListItem(lstLevel->getSelected()));
				    
IXMLReader* xml = device->getFileSystem()->createXMLReader(levelpath.c_str());
while(xml && xml->read())
{
switch(xml->getNodeType())
{
case EXN_TEXT:
break;
case EXN_ELEMENT:
if(stringw("mesh") == xml->getNodeName())
{
//load mesh
stringc meshpath;
meshpath = xml->getAttributeValue(L"file");
IAnimatedMesh* mesh = smgr->getMesh(meshpath.c_str());
IAnimatedMeshSceneNode* node = smgr->addAnimatedMeshSceneNode(mesh);
if (node)
{
node->setMaterialFlag(EMF_LIGHTING, false);
}
//setup Newton Mesh data
NewtonCollision* LvlCollision;
LvlCollision = NewtonCreateTreeCollision(nWorld, NULL);
NewtonTreeCollisionBeginBuild(LvlCollision);
//read in data from the irrlicht mesh data
//finallise mesh
NewtonTreeCollisionEndBuild(LvlCollision, 1);
//build newton body
NewtonBody* LevelBody = NewtonCreateBody(nWorld, LvlCollision);
//release mesh
NewtonReleaseCollision(nWorld, LvlCollision);
}
if(stringw("skymap") == xml->getNodeName())
{
//load sky
stringc imgTop;
stringc imgBottom;
stringc imgLeft;
stringc imgRight;
stringc imgFront;
stringc imgBack;
for(int i = 0;i < 6;i++)
{
xml->read();
if(stringw("image") == xml->getNodeName())
{
xml->getNodeData();
}
}
SkyBox = smgr->addSkyBoxSceneNode(
driver->getTexture(imgTop.c_str()),
driver->getTexture(imgBottom.c_str()),
driver->getTexture(imgLeft.c_str()),
driver->getTexture(imgRight.c_str()),
driver->getTexture(imgFront.c_str()),
driver->getTexture(imgBack.c_str()));
}
break;
}
}
// delete the parser after 
if(xml)xml->drop();

When I run the game I get a blank screen. What went wrong?

[pfo]

<image>../skys/reddesert_top.bmp</image>

XML sees this as 3 separate areas, an element, followed by text, followed by an element end. Your case handler for EXN_TEXT does nothing, so it never gets the skybox path. You could do 1 of 2 things, have the elements keep track of which EXN_TEXT the next skybox is, or the easier way would be to do your XML like this:

<image name="top" path="../skys/reddesert_top.bmp">

Then check which name you got from image, and set the path to load the texture:

Code: Select all

case EXN_ELEMENT:
    if (xml->getNodeName() == L"image")
    {
        name = xml->getAttributeValue(L"name");
        if (name == L"top") imgTop = xml->getAttributeValue(L"path");
    }
    break;

[sudi]

Do it the way i did it...right your own reader....its the easiest way....cause i couldn't get the irrxml parser to work either....

[Killingsworth]

There's nothing wrong with IrrXML. I like it. Follow JPulham's suggestions and you should be fine. He's right, it's not reading the path. So eather make the path an attribute (which is what I'd do) or make it read the text.