Using Irrlicht engine just to support model rendering

[galf]

Hi,

Environment: windows 7 64 bit, c++ visual studio 2012, no clr.

I'm new in irrlicht.

I have my own framework which I use in order to draw simple primitive in 3D
such as: lines, images,text, points etc.
In this framework:
*I use openGL (I define my own coordinate system).
* the framework has it's own "Game Loop"

now I want to draw a model using irrlicht within this framework.
I created a device using an handle I gave and set it to openGL:

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        HWND hIrrlichtWindow = mGlFrame->GetHandle();
    irr::video::SExposedVideoData videodata(hIrrlichtWindow);
    irr::SIrrlichtCreationParameters param;
    param.DriverType = irr::video::EDT_OPENGL;
    param.WindowId = reinterpret_cast<void*>(hIrrlichtWindow);
    param.Bits = 16;
    param.Fullscreen = false;
    param.Stencilbuffer = false;
    param.Vsync = false;
    irr::IrrlichtDevice* device = irr::createDeviceEx(param);
 

I took the "Hello world" example, and copied the settings :

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        IVideoDriver* driver = device->getVideoDriver();
    ISceneManager* smgr = device->getSceneManager();
        IAnimatedMesh* mesh = smgr->getMesh("sydney.md2");
        IAnimatedMeshSceneNode* node = smgr->addAnimatedMeshSceneNode( mesh );
        node->setMaterialFlag(EMF_LIGHTING, false);
        // I set a model position and camera position in such way I can see the result
        smgr->addCameraSceneNode(0, vector3df(0,30,-40), vector3df(0,5,0));
 

in the framework's game loop I inserted this code:

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         driver->beginScene(false, true, SColor(0,0,0,255));
    smgr->drawAll();
    driver->endScene();
 

problem:
1.When I draw the model it seems the normals (it's my explanation for the phenomena) does not look right,
meaning - the back of the model is drawn in the front (sydney's left arm is drawn in the same plane of it's right although they are clearly not in the same plane).

2. it seems irrlicht sometimes causes the framework's game-loop to be stuck (I guess)

3. some of the primitive I draw is not shown
does anybody have an idea?

[mongoose7]

1. I guess you have reversed the winding order for visible faces. For Irrlicht this is normally clockwise from the outside (I think). Irrlicht has a left-hand coordinate system.
2. No.
3. Irrlicht changes the OpenGL state, so you should set state for your code and restore it before calling Irrlicht. You may have changed the projection matrix.

[galf]

Thank you for your answer.

My problem was (like in many cases in opengl) in the opengl pipeline.
I did not call glEnable(GL_DEPTH_TEST)
after I called glDisable(GL_DEPTH_TEST)
in one of my primitives drawings.

The other issue caused by bad integration...