MS_4 Invisible wheels

#1 Is you name Akira?Just wondering ins not a usual name and one of my children are named Akira...sorry for the off topic post:)

#2 The wheel rendering code still hasn't been updated to match the characteristics of the batching system.

#3 Thank you for the info, Chris.
Robert, my name isn't Akiraa, loved the Anime movie...

#4 Nice!!My Daughter Is named Akira...I named her after the Movie!!

#5 Anyone able to shed light on add the wheels into the new batching approach?

I presume we need to add some code to WheeledVehicle.cpp to call the batch code before and after the wheels are dealt with.

#6 On wheeledVehicle.h, find this:

void setWheelSpring(S32 wheel,WheeledVehicleSpring*);

And add this right after it:

void prepBatchRender( SceneState *state, S32 mountedImageIndex );

Now in wheeledVehicle.cpp, somewhere after the WheeledVehicle::renderImage() function add this:

void WheeledVehicle::prepBatchRender(SceneState* state, S32 mountedImageIndex )
{

   Parent::prepBatchRender(state, mountedImageIndex);

   // Shape transform
   GFX->pushWorldMatrix();

   MatrixF mat = getRenderTransform();
   mat.scale( mObjScale );
   GFX->setWorldMatrix( mat );

   Wheel* wend = &mWheel[mDataBlock->wheelCount];
   for (Wheel* wheel = mWheel; wheel < wend; wheel++) 
   {
      if (wheel->shapeInstance) 
      {
         GFX->pushWorldMatrix();

         // Steering & spring extension
         MatrixF hub(EulerF(0,0,mSteering.x * wheel->steering));
         Point3F pos = wheel->data->pos;
         pos.z -= wheel->spring->length * wheel->extension;
         hub.setColumn(3,pos);

         GFX->multWorld(hub);

         // Wheel rotation
         MatrixF rot(EulerF(wheel->apos * M_2PI,0,0));
         GFX->multWorld(rot);

         // Rotation the tire to face the right direction
         // (could pre-calculate this)
         MatrixF wrot(EulerF(0,0,(wheel->data->pos.x > 0)? M_PI/2: -M_PI/2));
         GFX->multWorld(wrot);

         // Render!
         wheel->shapeInstance->animate();
         wheel->shapeInstance->render();
         
         GFX->popWorldMatrix();
      }
   }

   GFX->popWorldMatrix();

}

That'll make the wheels render. They'll not cast shadows, however, that requires some extra changes I haven't made yet.

#7 Thank you Manoel, I will give it a try.

#8 I added this but wheels are not rending still in TSE. Do you have to call that function anywhere?

#9 Oops, I forgot one change! Sorry!

In game/shapeBase.h, find this line:

void prepBatchRender( SceneState *state, S32 mountedImageIndex );

And change it to this:

virtual void prepBatchRender( SceneState *state, S32 mountedImageIndex );

Since WheeledVehicles inherit from shapeBase, you need to virtualize shapeBase's prepBatchRender so the WheeledVehicle can override it with it's own.

#10 It works !
Thank you Manoel.

#11 @Manoel - There is a bug in your code there... prepBatchRender will also be called per-mounted object... that's what the 'mountedImageIndex' is. So if you have something mounted to the vehicle you'll get the wheels rendered twice. The fix is to add this...

void WheeledVehicle::prepBatchRender(SceneState* state, S32 mountedImageIndex )
{
   Parent::prepBatchRender(state, mountedImageIndex);
   if ( mountedImageIndex != -1 )
      return;

I'm working on the shadow issue for wheels now... anyone look at it yet?

#12 Added that. wheels work now woot! =)