AbsolutePosition in ITerrainSceneNode not updated

[josemrsantos]

As posted here: http://irrlicht.sourceforge.net/forum/v ... 4&p=276788
I think there is a bug on ITerrainSceneNode, where AbsolutePosition is not returning the correct value, if the terrain is moved, even if updateAbsolutePosition is called.

Using Irrlicht 1.8 .

Code:

Code: Select all

 
#include <irrlicht.h>
#include "driverChoice.h"
#include <iostream>
#include <string>
#include <sstream>
 
using namespace irr;
using namespace std;
 
#ifdef _MSC_VER
#pragma comment(lib, "Irrlicht.lib")
#endif
 
int main()
{
 
  video::E_DRIVER_TYPE driverType=driverChoiceConsole();
  if (driverType==video::EDT_COUNT)
    return 1;
 
  irr::SIrrlichtCreationParameters params;
  params.DriverType=driverType;
  params.WindowSize=core::dimension2d<u32>(800, 600);
  params.Fullscreen= false;
  IrrlichtDevice* device = createDeviceEx(params);
  if (device == 0)
    return 1;
  video::IVideoDriver* driver = device->getVideoDriver();
  scene::ISceneManager* smgr = device->getSceneManager();
 
  scene::IMeshSceneNode* pinet1 = smgr->addMeshSceneNode(smgr->getMesh("./f_pinetree1/b3d__pinet1.b3d"));
  cout << "------------------ TEST IMeshSceneNode before setPosition   ------------\n";
  cout << "(";
  cout << pinet1->getAbsolutePosition().X;
  cout << ":";
  cout << pinet1->getAbsolutePosition().Z;
  cout << ")=(";
  cout << pinet1->getPosition().X;
  cout << ":";
  cout << pinet1->getPosition().Z;
  cout << ")\n";
  pinet1->setPosition(core::vector3df(11,100,11));
  cout << "------------------ TEST IMeshSceneNode after setPosition, before updateAbsolutePosition   ------------\n";
  cout << "(";
  cout << pinet1->getAbsolutePosition().X;
  cout << ":";
  cout << pinet1->getAbsolutePosition().Z;
  cout << ")=(";
  cout << pinet1->getPosition().X;
  cout << ":";
  cout << pinet1->getPosition().Z;
  cout << ")\n";
  pinet1->updateAbsolutePosition();
  cout << "------------------ TEST IMeshSceneNode after updateAbsolutePosition   ------------\n";
  cout << "(";
  cout << pinet1->getAbsolutePosition().X;
  cout << ":";
  cout << pinet1->getAbsolutePosition().Z;
  cout << ")=(";
  cout << pinet1->getPosition().X;
  cout << ":";
  cout << pinet1->getPosition().Z;
  cout << ")\n\n";
 
  scene::ITerrainSceneNode* terrain3 = smgr->addTerrainSceneNode("terrain.bmp");
  cout << "------------------ TEST TerrainSceneNode before setPosition   ------------\n";
  cout << "(";
  cout << terrain3->getAbsolutePosition().X;
  cout << ":";
  cout << terrain3->getAbsolutePosition().Z;
  cout << ")=(";
  cout << terrain3->getPosition().X;
  cout << ":";
  cout << terrain3->getPosition().Z;
  cout << ")\n";
  terrain3->setPosition(core::vector3df(11,100,11));
  cout << "------------------ TEST TerrainSceneNode after setPosition, before updateAbsolutePosition   ------------\n";
  cout << "(";
  cout << terrain3->getAbsolutePosition().X;
  cout << ":";
  cout << terrain3->getAbsolutePosition().Z;
  cout << ")=(";
  cout << terrain3->getPosition().X;
  cout << ":";
  cout << terrain3->getPosition().Z;
  cout << ")\n";
  terrain3->updateAbsolutePosition();
  cout << "------------------ TEST TerrainSceneNode after updateAbsolutePosition   ------------\n";
  cout << "(";
  cout << terrain3->getAbsolutePosition().X;
  cout << ":";
  cout << terrain3->getAbsolutePosition().Z;
  cout << ")=(";
  cout << terrain3->getPosition().X;
  cout << ":";
  cout << terrain3->getPosition().Z;
  cout << ")\t\n\n";
  
  exit(0);
}
 

Code output, where (absolutePosition.X:absolutePosition.Z)=(position.X:position.Z):

Code: Select all

 
------------------ TEST IMeshSceneNode before setPosition   ------------
(0:0)=(0:0)
------------------ TEST IMeshSceneNode after setPosition, before updateAbsolutePosition   ------------
(0:0)=(11:11)
------------------ TEST IMeshSceneNode after updateAbsolutePosition   ------------
(11:11)=(11:11)
 
Generated terrain data (129x129) in 0.0440 seconds
------------------ TEST TerrainSceneNode before setPosition   ------------
(0:0)=(0:0)
------------------ TEST TerrainSceneNode after setPosition, before updateAbsolutePosition   ------------
(0:0)=(11:11)
------------------ TEST TerrainSceneNode after updateAbsolutePosition   ------------
(0:0)=(11:11)
 

[CuteAlien]

CTerrainSceneNode does overwrite setPosition for some reason and not change the node-position. But don't know why it's doing that on a quick first look. Anyone got an idea? Maybe we should overwrite getAbsolutePosition and getAbsoluteTransformation additionally.

[hybrid]

The terrain scene node does all this position handling on its own. Not sure why really, but all the internal handling depends on it. Changing all this back to the usual way would probably be the better way, but having a quick fix which makes most of its interaction correct would also help.