How apply pitch and yaw to a newt body!

majc

02-09-2006 15:13:14

I have this code for yaw and pitch camera movement:



DarkFuture->mCamNode->yaw( Degree(-mRotate * mInputDevice->getMouseRelativeX()) );

   DarkFuture->mCamNode->getChild(0)->pitch( Degree(-mRotate * mInputDevice->getMouseRelativeY()) );

Now i want to apply this yaw and pitch movement to the body i created for my camera.
I already saw another posts but everything i did didnt work

I have forward, backwards and strafe working now i need this.

Thanks in advance!

lonwolf

03-09-2006 19:46:54

well your problem is really simple. Heres the simpliest way to do that:

Assuming your camera is attache to a scene node called mCamNode and u have a newton body attached to that node after the line youve just posted add these

Vector3 pos;

Quaternion orn;

mCameraBody->getPositionOrientation(pos, orn);

orn=mCamNode->getOrientation();

mCameraBody->setPositionOrientation(pos, orn);

everithing should work just fine

majc

03-09-2006 22:40:27

I tryed that mate but the problem is that the pitch dont work and the yaw movement its strange initialy the camera make a good yaw movement but when i walk a little the camera moves around the y axis like an orbit instead of rotate.
By the way i saw your website and your game seems very nice.

lonwolf

04-09-2006 10:49:28

Well the game is still under development, should be ready in 2 weeks.. only a part of it..

Only one question, can i see your cam movement code? i have the feeling its not right. First of all the camnode should be atached directly to the Root and you should move/rotate the cam node only. So if you move only the camera you will get an orbit.. you need to move the node. The cam will move along

majc

04-09-2006 21:14:06

Of course you can im thinking in release the fps camera code when i put it work.

cPlayer class code:





#include "cPlayer.h"

#include "DF.h"



cPlayer::cPlayer(Camera *cam, InputReader* InputDevice, SceneManager* SceneMgr, DF* _DF, OgreNewt::Body* body)

{

	DarkFuture = _DF;

	mCamera = cam;

	mSceneMgr = SceneMgr;

	mInputDevice = InputDevice;

	cam_body = body;	

	mRotate = 0.1;

}



void cPlayer::moveOrientation(){



   //camera orientation

   DarkFuture->mCamNode->setOrientation(quat/*Quaternion::IDENTITY*/);

   DarkFuture->cam_body->setPositionOrientation(lastPosition,quat/*Quaternion::IDENTITY*/);



   DarkFuture->mCamNode->pitch( Degree(pitchAngle));

   DarkFuture->cam_body->setPositionOrientation(lastPosition,Quaternion(Radian(Degree(yawAngle)),Vector3::UNIT_Y));

} 





void cPlayer::Input(const FrameEvent &evt)

{

	mCamera->getParentSceneNode()->detachObject( mCamera );//get camera nodes

    DarkFuture->mCamNode = mSceneMgr->getSceneNode( "CamNode" );

    mSceneMgr->getSceneNode( "PitchNode1" )->attachObject( mCamera );

		

		

	

	Vector3 trans, strafe, vec;

   



    quat = DarkFuture->mCamNode->getOrientation();



    vec = Vector3(0.0,0.0,-2);

    trans = quat * vec;



    vec = Vector3(2,0.0,0.0);

    strafe = quat * vec;

      

    bool up_enable;



    up_enable = true;



	



	//DarkFuture->cam_body->getPositionOrientation

   if (mInputDevice->isKeyDown(Ogre::KC_UP) || mInputDevice->isKeyDown(Ogre::KC_W))

   {

	   DarkFuture->cam_body->setVelocity( (trans * 6.0) );//add velocity to the body

   }

   

   if (mInputDevice->isKeyDown(Ogre::KC_DOWN) || mInputDevice->isKeyDown(Ogre::KC_S))

   {

      DarkFuture->cam_body->unFreeze();

      DarkFuture->cam_body->setVelocity( (trans * -1 * 6.0) );

   }



   if (mInputDevice->isKeyDown(Ogre::KC_LEFT) || mInputDevice->isKeyDown(Ogre::KC_A))

   {

      DarkFuture->cam_body->unFreeze();

      DarkFuture->cam_body->setVelocity( (strafe * -1 * 6.0) );

   }



   if (mInputDevice->isKeyDown(Ogre::KC_RIGHT) || mInputDevice->isKeyDown(Ogre::KC_D))

   {

      DarkFuture->cam_body->unFreeze();

      DarkFuture->cam_body->setVelocity( (strafe * 6.0) );

   }



   if (mInputDevice->isKeyDown(Ogre::KC_PGDOWN))

   {

      Ogre::Vector3 dir(0,-1,0);

      DarkFuture->cam_body->setVelocity( (dir * 6.0) );

   }



   if (mInputDevice->isKeyDown(Ogre::KC_PGUP))

   {

      Ogre::Vector3 dir(0,1,0);

      DarkFuture->cam_body->setVelocity( (dir * 6.0) );

   }

   DarkFuture->cam_body->setOmega(Ogre::Vector3::ZERO );//for camera dont start rotate

   //DarkFuture->cam_body->getPositionOrientation(lastPosition,quat);



   yawAngle += -mRotate * mInputDevice->getMouseRelativeX();

   pitchAngle += -mRotate * mInputDevice->getMouseRelativeY();

	

  



   Ogre::Quaternion quater;

   Ogre::Matrix3 mMatrix;

   Ogre::Vector3 vect, mTorque;

  

   

   //DarkFuture->mCamNode->yaw( Degree(-mRotate * mInputDevice->getMouseRelativeX()) );

   //DarkFuture->mCamNode->getChild(0)->pitch( Degree(-mRotate * mInputDevice->getMouseRelativeY()) );

   mTorque = Ogre::Vector3(yawAngle,pitchAngle,0);

   DarkFuture->cam_body->setTorque(mTorque);

   //Ogre::lo

   //vect = DarkFuture->mCamNode->getPosition(); 

   DarkFuture->cam_body->getPositionOrientation(vect,quater);

   quater = DarkFuture->mCamNode->getOrientation();

   //DarkFuture->mCamNode->pitch(Ogre::Degree(quater.y));	

   //DarkFuture->mCamNode->yaw(Ogre::Degree(quater.x));

   DarkFuture->cam_body->setPositionOrientation(vect,quater);

      //moveOrientation();// give the movement of the camera to the body

   //quat = DarkFuture->mCamNode->getOrientation();	

   //lastPosition = DarkFuture->mCamNode->getPosition(); //get the last position of the camera

   

   

}

create camera code:





void DF::createCamera() {

   mCamera = mSceneMgr->createCamera("PlayerCam");

   mCamNode = mSceneMgr->getRootSceneNode()->createChildSceneNode("CamNode");



   // Create the pitch node

   mCamNode = mCamNode->createChildSceneNode( "PitchNode1" );

   mCamNode->attachObject(mCamera);

   mCamNode->setPosition(0,50,0);

   mCamera->setNearClipDistance(0.1);

}

Create camera body code:





void DF::createCamBody()

{

		col = new OgreNewt::CollisionPrimitives::Ellipsoid( m_World, Ogre::Vector3(1,1,1) );

		cam_body = new OgreNewt::Body( m_World, col );

		delete col;







		Ogre::Real mass = 20.0;

		Ogre::Vector3 inertia = OgreNewt::MomentOfInertia::CalcEllipsoidSolid( mass,Ogre::Vector3(1,1,1));

		cam_body->setMassMatrix( mass, inertia );

		Vector3 posi = mCamNode->getPosition();

		cam_body->setPositionOrientation(posi, mCamNode->getOrientation()); 

		cam_body->addForce(Vector3(0,-9.8,0));

		cam_body->setStandardForceCallback();

		cam_body->setAutoFreeze(0);

		cam_body->attachToNode(mCamNode);

		cam_body->setLinearDamping ( 0.01f );

		cam_body->setAngularDamping ( Vector3(0.01f, 0.01f, 0.01f )); 

		cam_body->setUserData(this);



		const OgreNewt::MaterialID* mMatDefault = m_World->getDefaultMaterialID();

		const OgreNewt::MaterialID* mMatCamera = new OgreNewt::MaterialID( m_World );

   

		OgreNewt::MaterialPair *mMatPairDefaultCamera = new OgreNewt::MaterialPair( m_World, mMatDefault, mMatCamera );

		mMatPairDefaultCamera->setDefaultFriction( 0.4, 0.4 );

		mMatPairDefaultCamera->setDefaultSoftness(0.1);

		mMatPairDefaultCamera->setDefaultElasticity(0.0);

		mMatPairDefaultCamera->setContinuousCollisionMode(1);

		cam_body->setMaterialGroupID(mMatCamera);

		new OgreNewt::BasicJoints::UpVector( m_World, cam_body, Ogre::Vector3::UNIT_Y );

}

I think all code needed is here.
If you can see what is the problem i will thank you alot.

lonwolf

04-09-2006 21:26:03

as i can see from yourr code:

1. this line is reduntant: cam_body->addForce(Vector3(0,-9.8,0)); this has only efect in an forca callback function but u dont need it coz u use standard force callback.
2. that elipsoid is a bit to small i guess. if u want the cam not to collide and have a nice view when hitting a wall you should enlarge it in such manner that when u open OgreNewt::Debugger yoou can see the cameras body from the inside if u understand wat i mean.
3.the orbiting camera is abnormal since its parent mCamNode is at 0,0,0 and the pitch node at 0,50,0 shouldnt pose problems..
4. heres my code for yawing a body (main character and it could work to pitch it too)

void mouseDragged (MouseEvent *e) 

   { 

	   if(currMouse && !the_hero.isInFirstPerson)

	   {

		   CEGUI::MouseCursor::getSingleton().hide();

		   mCamNode->yaw( Degree(-e->getRelX( ) * mRotateM) );

		   the_hero.playerBody->setPositionOrientation(mCamNode->getPosition(), mCamNode->getOrientation());

		   mCamNode->getChild( 0 )->pitch( Degree(-e->getRelY() * mRotateM) );

	   }

       mouseMoved(e);

   }

if u raplace

mCamNode->getChild( 0 )->pitch( Degree(-e->getRelY() * mRotateM) );

with

mCamNode->pitch( Degree(-e->getRelY() * mRotateM) );

you can have o working pitch code.

hope it helps.

majc

04-09-2006 22:15:25

Thanks mate i will try it i think i will try to join my code tou yours and hansel code.
And see what i get.

majc

05-09-2006 00:36:12

When i aply pitch all my screen becames black but without pitch it works fine.
This is the code of the creation of the camera and the 2 nodes:





void DF::createCamera() {

  

   mCamera = mSceneMgr->createCamera("PlayerCam");

   mCamera->setNearClipDistance(0.1);

  

   mCamBodyNode = mSceneMgr->getRootSceneNode()->createChildSceneNode("CamBodyNode");

   //mCamBodyNode->setPosition(0,0,0);

   mCamBodyNode->setScale(cam_size);



   mCamView = mCamBodyNode->createChildSceneNode(Vector3(0,5,0));

   mCamView->attachObject(mCamera);

  

}

This is where i call the pitch:





void cPlayer::Input(const FrameEvent &evt)

{

	/*mCamera->getParentSceneNode()->detachObject( mCamera );//get camera nodes

    DarkFuture->mCamBodyNode = mSceneMgr->getSceneNode( "CamBodyNode" );

    mSceneMgr->getSceneNode( "CamView" )->attachObject( mCamera );*/

		

		

	

	Vector3 trans, strafe, vec;

   



    quat = DarkFuture->mCamBodyNode->getOrientation();



    vec = Vector3(0.0,0.0,-2);

    trans = quat * vec;



    vec = Vector3(2,0.0,0.0);

    strafe = quat * vec;

      

    bool up_enable;



    up_enable = true;



	

   if (mInputDevice->isKeyDown(Ogre::KC_UP) || mInputDevice->isKeyDown(Ogre::KC_W))

   {

	   DarkFuture->cam_body->setVelocity( (trans * 15.0) );//add velocity to the body

   }

   

   if (mInputDevice->isKeyDown(Ogre::KC_DOWN) || mInputDevice->isKeyDown(Ogre::KC_S))

   {

      DarkFuture->cam_body->unFreeze();

      DarkFuture->cam_body->setVelocity( (trans * -1 * 15.0) );

   }



   if (mInputDevice->isKeyDown(Ogre::KC_LEFT) || mInputDevice->isKeyDown(Ogre::KC_A))

   {

      DarkFuture->cam_body->unFreeze();

      DarkFuture->cam_body->setVelocity( (strafe * -1 * 15.0) );

   }



   if (mInputDevice->isKeyDown(Ogre::KC_RIGHT) || mInputDevice->isKeyDown(Ogre::KC_D))

   {

      DarkFuture->cam_body->unFreeze();

      DarkFuture->cam_body->setVelocity( (strafe * 15.0) );

   }



   if (mInputDevice->isKeyDown(Ogre::KC_PGDOWN))

   {

      Ogre::Vector3 dir(0,-1,0);

      DarkFuture->cam_body->setVelocity( (dir * 6.0) );

   }



   if (mInputDevice->isKeyDown(Ogre::KC_PGUP))

   {

      Ogre::Vector3 dir(0,1,0);

      DarkFuture->cam_body->setVelocity( (dir * 6.0) );

   }



   camRotationX = -mInputDevice->getMouseRelativeX() * xSensitivity /(100 * evt.timeSinceLastFrame);

   camRotationY = -mInputDevice->getMouseRelativeY() * ySensitivity /(100 * evt.timeSinceLastFrame);



   DarkFuture->cam_body->setOmega(Ogre::Vector3(0 ,camRotationX ,0));//for camera dont start rotate

   

   // Create the pitch node

  

   



   DarkFuture->mCamView->pitch( Degree(camRotationY) );

   

}