Problem creating character

Hello, i've been searching around and i can't seem to find the solution for this specifically. I am creating an FPS kind of game. I think it is best to use character for my player and also for my enemies. Now i am doing the player.
Here is how my code looks like...

NxOgre::Character *mPlayer; // player
NxOgre::CharacterParams mParams; // player params

mParams.setToDefault();

// when i run the app i get error on this line
mPlayer = mScene->createCharacter("Player", NxOgre::Pose(0, 200, 0), mParams);

The error i get is this...
Unhandled exception at 0x00687155 (NxOgre_d.dll) in App.exe: 0xC0000005: Access violation reading location 0x00000000.

Something to do with the dll, but I build NxOgre without any problems. According to the changes.txt, the NxOgre version is 0.9-38 and the PhysX version is Ageia PhysX SDK 2.7.2. Please help.

Are you sure that mScene is initialized?

Yes i have those...

NxOgre::World *mWorld;
NxOgre::Scene *mScene;

NxOgre::Character *mPlayer;
NxOgre::CharacterParams mParams;

mWorld = new NxOgre::World ();

mScene = mWorld->createScene ("myScene", mSceneMgr, "gravity: 0 -980 0, floor: yes");

mParams.setToDefault();
mPlayer = mScene->createCharacter("Player", NxOgre::Pose(0, 200, 0), mParams);

I am able to create body and actor with this code but i just can't create the character.

I got the same problems. For two reasons in the past. The first reason was I did not set the parameter to default (you did that right) and the second reason was, I used not corresponding libs/dll...

try to do this

CharacterParams cp;
cp.setToDefault();
cp.mType = CharacterParams::CT_Box;
cp.mDimensions.set(0.5f, 2.0f, 0.5f);
cp.mSkinWidth = 1.0f;

here is working

i'm sorry. It is still not working. i get the same error. I managed to go deeper and see at the point of the crash.

In NxOgreCharacter.h:

96|mNxActorUserData = new NxActorUserData(this, NxActorUserData::T_Character);
97|mCharacter->getActor()->setGroup(0);
98|mCharacter->getActor()->userData = mNxActorUserData;
99|mCharacter->setCollision(true);

It crashes at line 97.

Then the character wasn't created, probably due to an invalid NxCharacterControllerDesc. Is there any errors in the log or console window related to this?

There are two errors shown in the NxOgre.log...


NxOgre::Error::reportError#78T0 F0

PhysX Error (NXE_INVALID_PARAMETER) 'Actor::loadFromDescInternal: Can't compute mass from shapes: must have at least one non-trigger shape!' in line 388 of g:\scm\release\PhysX_2.7.2\novodex\SDKs\Physics\src\Actor.cpp


NxOgre::Error::reportError#78T0 F0

PhysX Error (NXE_INVALID_PARAMETER) 'Actor Initialisation failed: returned NULL.' in line 776 of g:\scm\release\PhysX_2.7.2\novodex\SDKs\Physics\src\NpScene.cpp

Try to add "mass: 100" to your params. But normally there should be a default value.

By the way is gravity -980 a valid value? Betajaen?

No..That didn't work neither..

PhysX Error (NXE_INVALID_PARAMETER) 'Actor Initialisation failed: returned NULL.' in line 776 of g:\scm\release\PhysX_2.7.2\novodex\SDKs\Physics\src\NpScene.cpp

That's your problem of the Character or another actor. Let's see your Character code again.

@xadh00m

It's extremely high. It's four times higher than the sun.

Here is everything from start to end...

NxOgre::World *mWorld;
NxOgre::Scene *mScene;

mWorld = new NxOgre::World ();

mScene = mWorld->createScene ("myScene", mSceneMgr, "gravity: 0 -980 0, floor: yes, renderer: ogre");

// Create a box
mCube = mScene->createBody ("box.mesh"
,new NxOgre::CubeShape (100.0f) // Collision Model
,Vector3 (0,200,0) // starting position
,"density: 0.00785");

// create a character
NxOgre::Character *mCharacter = 0;
NxOgre::CharacterParams mCP;
mCP.setToDefault();

mCharacter = mScene->createCharacter("Player", NxOgre::Pose(0, 50, 0), mCP);

// create a sphere
NxOgre::Body *mSphere = 0;

// add a sphere in the game
mSphere = mScene->createBody ("sphere.mesh"
,new NxOgre::SphereShape(100.0f) // Collision Model
,Vector3 (10,200,0) // starting position
,"density: 0.00785");

From this code I am able to create the cube. Debug will crash when creating the character. Commenting the create character line will allow me to create the sphere successfully.

Do what LFMS said:

try to do this

CharacterParams cp;
cp.setToDefault();
cp.mType = CharacterParams::CT_Box;
cp.mDimensions.set(0.5f, 2.0f, 0.5f);
cp.mSkinWidth = 1.0f;

here is working

Ok, my code now looks like this...

NxOgre::World *mWorld;
NxOgre::Scene *mScene;

mWorld = new NxOgre::World ();

mScene = mWorld->createScene ("myScene", mSceneMgr, "gravity: 0 -980 0, floor: yes, renderer: ogre");

// Create a box
mCube = mScene->createBody ("box.mesh"
,new NxOgre::CubeShape (100.0f) // Collision Model
,Vector3 (0,200,0) // starting position
,"density: 0.00785");

// create a character
NxOgre::Character *mCharacter = 0;
NxOgre::CharacterParams cp;
cp.setToDefault();
cp.mType = CharacterParams::CT_Box;
cp.mDimensions.set(0.5f, 2.0f, 0.5f);
cp.mSkinWidth = 1.0f;

mCharacter = mScene->createCharacter("Player", NxOgre::Pose(0, 50, 0), cp);

// create a sphere
NxOgre::Body *mSphere = 0;

// add a sphere in the game
mSphere = mScene->createBody ("sphere.mesh"
,new NxOgre::SphereShape(100.0f) // Collision Model
,Vector3 (10,200,0) // starting position
,"density: 0.00785");

It still crashes at the same place with the same error. I tried changing the type to CT_CAPSULE I would still get the same error.

hmmm...
Did you test this code snippet in Cake with the same libs?

PhysX Error (NXE_INVALID_PARAMETER) 'Actor Initialisation failed: returned NULL.' in line 776 of g:\scm\release\PhysX_2.7.2\novodex\SDKs\Physics\src\NpScene.cpp

That's your problem of the Character or another actor. Let's see your Character code again.

@xadh00m

It's extremely high. It's four times higher than the sun.

Correctly spoken its a very low value, isn´t it? Is it right to set a negative value? I currently use 9.81.