controling characters moving make a mistake?

sxk8087

27-08-2008 04:57:05

I use "Body->setVelocity()" to control characters moving forward.
"Body->setOmega()" to Rotate. But making characters move forward for a period of time. The characters will not move no matter what I do
(Such as press Key'W','S','A','D'). my code is :
if (keyboard->isKeyDown(KC_W))
{
mDirection = mMainNode->getOrientation() * ctor3::UNIT_X;
mDirection.y = 0;
Body->setVelocity(mDirection);
}
if (keyboard->isKeyDown(KC_A))
{
mDirection = mMainNode->getOrientation()*Vector3::UNIT_X;
mDirection.y = 0;
Body->setVelocity(mDirection);
Body->setOmega(Vector3(0,1,0));
}
I can control it at the beginning,but after it I can not control until the last. Other,I want to know how you control characters.
I am sorry that my English is poor.I hope you understand my meaning

micken

27-08-2008 05:08:25

Make sure you are updating your world every frame (i.e. mWorld->update();)

If this is not the problem please post more information on how you are creating and managing the body you are trying to move.

sxk8087

27-08-2008 07:34:36

My code is:

 bool frameStarted(const FrameEvent& evt)

    {  ................................

	mWorld->update(true); 

if (keyboard->isKeyDown(KC_W)) 

{ 

mDirection = mMainNode->getOrientation() * ctor3::UNIT_X; 

mDirection.y = 0; 

Body->unFreeze();

Body->setVelocity(mDirection); 

} 

if (keyboard->isKeyDown(KC_A)) 

{ 

mDirection = mMainNode->getOrientation()*Vector3::UNIT_X; 

mDirection.y = 0; 

Body->unFreeze();

Body->setVelocity(mDirection); 

Body->setOmega(Vector3(0,1,0)); 

} .........................

}

  void createScene(void)

{  ..........              //"mNode"  is  floor node, is  fixed 

		OgreNewt::Collision* col = new OgreNewt::CollisionPrimitives::TreeCollision(mWorld, mNode, true );

		OgreNewt::Body* Body = new OgreNewt::Body(mWorld, col );

		delete col;

		Body->attachToNode( mNode );

//"mMainNode"  is character's node

		   OgreNewt::Collision* col = new OgreNewt::CollisionPrimitives::ConvexHull(mWorld,mMainNode); 

	       Body = new OgreNewt::Body(mWorld,col);

		   Body->attachToNode( mMainNode );



		   Body->setPositionOrientation( Ogre::Vector3(30,0,0),Ogre::Quaternion::IDENTITY);

		   delete col;



		   Ogre::Real mass = 10.0;

		   Ogre::Vector3 inertia = OgreNewt::MomentOfInertia::CalcCylinderSolid( mass, 0.5, 0.7);

    	   Body->setMassMatrix( mass, inertia );

		  Body->setStandardForceCallback();

}

micken

28-08-2008 01:31:30



mWorld->update(true);

This is most likely your problem. You need to pass the time since the last frame to the update function so OgreNewt knows how much time to simulate.



mWorld->update(evt.timeSinceLastFrame);



Body->unFreeze();

OgreNewt has the tendency to freeze things. If your object is being controlled by the user then it makes a lot of sense to use setAutoFreeze(false) on it when you create it so that it will never be frozen.



Body->setAutoFreeze(false);