irrlicht-newton geometry

[DarkScythe]

okay yea i got it all compiled now.
but it's still not scaling it.

this is what i have:

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NewtonCollision* myShape = NewtonCreateBox(nWorld, size2.X, size2.Y, size2.Z, NULL);
	NewtonCollision* collision;
	collision = NewtonCreateConvexHullModifier(nWorld,myShape);
	dMatrix pMatrix;
	NewtonConvexHullModifierGetMatrix(collision, &pMatrix[0][0]);
	pMatrix.m_up.m_x *= 0.4;
	pMatrix.m_up.m_y *= 2;
	pMatrix.m_up.m_z *= 0.4;

	NewtonConvexHullModifierSetMatrix(collision, &pMatrix[0][0]);

am i doing it right?
changing the numbers didn't seem to have any effects...

???
where is your body?

[Guest]

oh sorry..here's a better chunk of the code

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node = Core->getSceneMngr()->addAnimatedMeshSceneNode(mesh);
	camera = new ThirdCamera(node,Core->getSceneMngr()->addCameraSceneNode(),camOffset);
	node->setMaterialTexture (0, Core->getVideo()->getTexture(texture));

	//newton for player
	if (node)
	{
      node->setMaterialFlag(EMF_LIGHTING, false);
	  node->setPosition(playerPosition); //wtf
	  //node->setRotation(vector3df(0,0,0));
	  //node->setScale(vector3df(0.1,0.1,0.1));
	}
    
	//size the box in Newton units
	
	aabbox3d<f32> sbox = mesh->getMesh(0)->getBoundingBox();
    vector3df size2 = sbox.getExtent();

	NewtonCollision* myShape = NewtonCreateBox(nWorld, size2.X, size2.Y, size2.Z, NULL);
	NewtonCollision* collision = NewtonCreateConvexHullModifier(nWorld,myShape);
	NewtonReleaseCollision(nWorld,myShape);
	NewtonBody* myBody = NewtonCreateBody(nWorld, myShape);
	
 	NewtonBodySetUserData((const NewtonBody *) myBody, (void *) node); //with this you are sending your graphic pointer to Newton.
	
	NewtonBodySetMassMatrix(myBody, 1.0f, 1.0f, 1.0f, 1.0f);
	NewtonBodySetForceAndTorqueCallback(myBody, Physics::setForceAndTorque);
	NewtonBodySetTransformCallback(myBody, Physics::setTransform);

	matrix4 mat2;
	mat2.setTranslation(node->getPosition());
	NewtonBodySetMatrix(myBody, &mat2.M[0]);

	NewtonJoint* upVector;
	vector3df upDirection (0.0f, 1.0f, 0.0f);
	upVector = NewtonConstraintCreateUpVector (nWorld, &upDirection.X, myBody);

	score = 0;
	speed = 0;
	
	dMatrix pMatrix;
	NewtonConvexHullModifierGetMatrix(collision, &pMatrix[0][0]);
	pMatrix.m_up.m_x += 40;
	pMatrix.m_up.m_y += 40;
	pMatrix.m_up.m_z += 40;

	NewtonConvexHullModifierSetMatrix(myShape, &pMatrix[0][0]);

thanks

[DarkScythe]

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 NewtonReleaseCollision(nWorld,myShape);
   NewtonBody* myBody = NewtonCreateBody(nWorld, myShape); 

i did not look at all but first i saw this , you release "myShape" and create the body with it, you should create the body with the collision you've created:

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NewtonCollision* collision = NewtonCreateConvexHullModifier(nWorld,myShape); 

[DarkScythe]

and again:

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dMatrix pMatrix;
   NewtonConvexHullModifierGetMatrix(collision, &pMatrix[0][0]);
   pMatrix.m_up.m_x += 40;
   pMatrix.m_up.m_y += 40;
   pMatrix.m_up.m_z += 40;

   NewtonConvexHullModifierSetMatrix(myShape, &pMatrix[0][0]);

you've released "myShape" , you should only deal with "collision" , be careful with it, you may release "collision" at the end.

[Guest]

oh..those mistakes i was just fooling around with the codes before.

but after i fixed it back,

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   NewtonCollision* myShape = NewtonCreateBox(nWorld, size2.X, size2.Y, size2.Z, NULL);
	NewtonCollision* collision = NewtonCreateConvexHullModifier(nWorld,myShape);
	
	NewtonBody* myBody = NewtonCreateBody(nWorld, collision);
   dMatrix pMatrix;
	NewtonConvexHullModifierGetMatrix(collision, &pMatrix[0][0]);
	pMatrix.m_up.m_x += 0.04;
	pMatrix.m_up.m_y += 0.04;
	pMatrix.m_up.m_z += 0.04;

	NewtonConvexHullModifierSetMatrix(collision, &pMatrix[0][0]);
	NewtonReleaseCollision(nWorld,collision);

still no changes to the model...

[Guest]

oh again...
pMatrix.m_up.m_x += 0.04;

should have been
pMatrix.m_up.m_x *= 0.04;

[Acki]

Well, creating a new body would be more easy....

[Guest]

Well, creating a new body would be more easy....

could you give me some example to illustrate your suggestion? i'm a little bit confused...

thanks

[Acki]

Use NewtonDestroyBody(const NewtonWorld* newtonWorld, const NewtonBody* bodyPtr) to delete the current body and create a new body as desired...

[Guest]

ok thanks, but i meant, when creating new body, how's the scaling part takes place?

[Acki]

Well, try something like this:

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vector3df size2 = mesh->getMesh(0)->getBoundingBox().getExtent() * node->getScale();
NewtonCollision* myShape = NewtonCreateBox(nWorld, size2.X, size2.Y, size2.Z, NULL);

[Guest]

ok yea. it kind a works. just for clarification, the above method is to scale the bounding box right? but right now, for some reason when i scale the node player itself, it messes up the mesh...like it's being stretched all over the place.
(this is being done by playernode->setScale(vector3df(..,..,..)); )

anyone knows why it's happening like this?

thanks

[Guest]

sorry...after further testing, i found out i was inside the model and that's why it looked like it's messed up.
now it seems doing anything to the model did not do anything (ie rotating it)
i'm going to test some things first..

thanks guys for the help