Game Development Community

Rotate player around X or Y axis

by Eric den Boer · in Torque 3D Professional · 07/28/2009 (1:52 pm) · 23 replies

Hi all,

What I want to create is the following: have a player collide with a TSStatic, and when a certain flag on that static is set to true, have it scale the object, or walk on the wall of the object. Now, I've got the flags going and all that but now I'm running into the problem that I cannot rotate the player around its X or Y axis. Only around the Z-axis, using the mRot member.

Now, naturally I went looking for what caused this and I found out that the X and Y of mRot is never taken into account. Okay, good... so I changed things in setPosition and setRenderPosition etc. to have it take the X and Y of mRot into account.

void Player::setPosition(const Point3F& pos,const Point3F& rot)
{
   MatrixF mat;
   if (isMounted()) {
      // Use transform from mounted object
      MatrixF nmat,zrot;
      mMount.object->getMountTransform(mMount.node,&nmat);
      zrot.set(EulerF(rot.x, rot.y, rot.z)); // CHANGED THIS
      mat.mul(nmat,zrot);
   }
   else {
      mat.set(EulerF(rot.x, rot.y, rot.z)); // CHANGED THIS
      mat.setColumn(3,pos);
   }
   Parent::setTransform(mat);
   mRot = rot;

   if ( mPhysicsPlayer )
      mPhysicsPlayer->setPosition( mat );
}


void Player::setRenderPosition(const Point3F& pos, const Point3F& rot, F32 dt)
{
   MatrixF mat;
   if (isMounted()) {
      // Use transform from mounted object
      MatrixF nmat,zrot;
      mMount.object->getRenderMountTransform(mMount.node,&nmat);
      zrot.set(EulerF(rot.x, rot.y, rot.z)); // CHANGED THIS
      mat.mul(nmat,zrot);
   }
   else {
      EulerF   orient(rot.x, rot.y, rot.z); // CHANGED THIS 

      mat.set(orient);
      mat.setColumn(3, pos);

      if (inDeathAnim()) {
         F32   boxRad = (mDataBlock->boxSize.x * 0.5f);
         if (MatrixF * fallMat = mDeath.fallToGround(dt, pos, rot.z, boxRad))
            mat = * fallMat;
      }
      else
         mDeath.initFall();
   }
   Parent::setRenderTransform(mat);
}

However, when I set the rotation around the X axis to say 0.5, it won't work. How do I get the player objec to rotate around the X-axis, so I can then start working on having it run over the verticle surface of the object.

Thanks!
NextNext Thread
PrevPrevious Thread
More from Torque 3D Professional
Page«First 1 2 Next»

Torque Owner Ivan Mandzhukov
Liman3D
#21
09/11/2009 (4:01 pm)
A good idea is to reverse the gravity in your case (you can use gravitymod for it).
You should check very well what happens when jumping(in updatemove())
Input can be corrected in moveList or at the begining of updateMove().

Torque 3D Owner Eric den Boer
#22
09/11/2009 (4:34 pm)
i27.tinypic.com/4udgty.jpg
This is what's happening btw.

edit: I'll check it out. Will this enable me to apply the rotation to the player's movement?

Torque Owner Ivan Mandzhukov
Liman3D
#23
09/12/2009 (6:48 am)
Now i understand why when jumping you flip.
Acceleration should be calculated using the contactNormal.
In updateMove() go to the fragment of triggering jump.

replace:
acc.z += scaleZ * impulse * zSpeedScale;

with this:
acc += contactNormal * scaleZ * impulse * zSpeedScale;

Also your gravity should be recalculated:
VectorF acc(0.0f, 0.0f, mGravity * mGravityMod * TickSec);


will become:
VectorF acc;
acc.zero();
acc = contactNormal;//a possible findcontact() call here
acc.neg();
acc *= mGravityMod * TickSec;
Page«First 1 2 Next»