Why are triangles cropped in this grid?

Question

I have the following code:

#include <irrlicht.h>

using namespace irr;

using namespace core;
using namespace scene;
using namespace video;
using namespace io;
using namespace gui;

int main(int argc, char** argv)
{
    IrrlichtDevice *device =
        createDevice(EDT_SOFTWARE, dimension2d<unsigned int>(640, 480), 16,
            false, false, false, 0);

    device->setWindowCaption(L"Train Simulator Demo");

    IVideoDriver* driver = device->getVideoDriver();
    ISceneManager* smgr = device->getSceneManager();
    IGUIEnvironment* guienv = device->getGUIEnvironment();

    IAnimatedMesh* mesh1 = smgr->getMesh("media/simple_engine.b3d");
    IAnimatedMesh* mesh2 = smgr->getMesh("media/simple_track.b3d");

    IAnimatedMeshSceneNode* node1 = smgr->addAnimatedMeshSceneNode( mesh1 );
    IAnimatedMeshSceneNode* node2 = smgr->addAnimatedMeshSceneNode( mesh2 );

    if (node1)
        node1->setMaterialFlag(EMF_LIGHTING, false);

    if (node2)
    {
        node2->setMaterialFlag(EMF_LIGHTING, false);
        node2->setMaterialTexture( 0, driver->getTexture("media/grass.jpg") );
    }

    ICameraSceneNode * pCamera = smgr->addCameraSceneNode(0, vector3df(5,0,5), vector3df(0,0,0));

    pCamera->setNearValue(0.5f);
    pCamera->setFarValue(40.0f);

    while(device->run())
    {
        driver->beginScene(true, true, SColor(0,0,0,0));

        u32 cur_time = device->getTimer()->getTime();
        float f_time = (float)cur_time / 1000.0f;

        // Change the camera
        pCamera->setPosition(vector3df(sinf(f_time) * 8.0f ,3.0f ,cosf(f_time) * 8.0f));

        smgr->drawAll();
        guienv->drawAll();

        driver->endScene();
    }

    device->drop();

    return 0;
}

... which at startup creates the following:

... that’s fine, except that the grass should be a grid of 16x16 squares, and for some reason some of the triangles are cropped. It also seems that this is due to the fact that triangles are only partially displayed on the screen, while only triangles that are completely in the window's viewing window are displayed. How can i fix this?

Additionally:

OS: Ubuntu 10.04 64-bit
Irrlicht version: 1.7 beta p>

Answer 1

, , OpenGL.

, 13:

IrrlichtDevice *device =
    createDevice(EDT_SOFTWARE, dimension2d<unsigned int>(640, 480), 16,
        false, false, false, 0);

:

IrrlichtDevice *device =
    createDevice(EDT_OPENGL, dimension2d<unsigned int>(640, 480), 16,
        false, false, false, 0);