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Triggers and Flying Vehicles (once again)

by Martin Schultz · in Torque Game Engine · 10/21/2004 (11:42 am) · 7 replies

Hi,

I'm trying to get it to work that flying vehicles actually produce an trigger event when flying through triggers. I read through most of the trigger posts here in the forums and I wasn't able to really find the solution from the posts.

I tried in the FlyingVehicle.cc file to extend the mask:
sServerCollisionMask
to include also the TriggerObjectType like this:
static U32 sServerCollisionMask = (sCollisionMoveMask | TriggerObjectType);
but the only thing happens is that the ship collides with the trigger instead of creating a trigger event.

I compared also the wheeledVehicle files against the flyingVehicle files, but wasn't able to see the magic difference as I read somewhere in the forums that triggers should work with the wheeled vehicles. Can anyone light my darkness and solve this issue?

Thanks for any help! :-)

Best,
Martin
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Torque Owner Gonzo T. Clown
#1
10/21/2004 (2:50 pm)
First of all, the vehicles have TriggerDetection built in.

In vehicle.cc you would find....

// Trigger objects that are not normally collided with.
static U32 sTriggerMask = ItemObjectType     |
                          TriggerObjectType  |
                          CorpseObjectType;



And also....

void Vehicle::checkTriggers()
{
   Box3F bbox = mConvex.getBoundingBox(getTransform(), getScale());
   gServerContainer.findObjects(bbox,sTriggerMask,findCallback,this);
}


And your error is being created here(most likely)....


void Vehicle::findCallback(SceneObject* obj,void *key)
{
   Vehicle* vehicle = reinterpret_cast<Vehicle*>(key);
   //U32 objectMask = obj->getTypeMask();
   U32 objectMask = obj->getTypeMask();

   // Check: triggers, corpses and items, basically the same things
   // that the player class checks for
   if (objectMask & TriggerObjectType) {
      Trigger* pTrigger = static_cast<Trigger*>(obj);
      pTrigger->potentialEnterObject(vehicle);
   }
   else if (objectMask & CorpseObjectType) {
      ShapeBase* col = static_cast<ShapeBase*>(obj);
      vehicle->queueCollision(col,vehicle->getVelocity() - col->getVelocity());
   }
   else if (objectMask & ItemObjectType) {
      Item* item = static_cast<Item*>(obj);
      if (vehicle != item->getCollisionObject())
         vehicle->queueCollision(item,vehicle->getVelocity() - item->getVelocity());
   }
}

Torque Owner Martin Schultz
#2
10/21/2004 (9:38 pm)
Hi,

I looked at the source this morning but couldn't find that what you mean. The only thing that catched me was the "objectMask" variable, but I wasn't able to find where it comes from or where it is filled. Did you mean that one?

Anyone? :-)

Best,
Martin

Torque Owner Martin Schultz
#3
10/22/2004 (12:45 pm)
Bump di bump... anyone? :-)

Torque Owner Gonzo T. Clown
#4
10/22/2004 (3:10 pm)
Martin, just out of curiosity I ran a test to see if my flying vehicle would trigger a basic trigger and it did, I got this in my echo....

Team 1 trigger entered by this = 182 Trig = 1922 obj = 2055


'this' is the trigger's datablock ID#

'Trig' is the trigger's objectID#

'obj' is the vehicle's objectID#


So as far as I can tell, it should work. What version of TGE are you using?

Torque Owner Martin Schultz
#5
10/23/2004 (1:15 pm)
Hi,

hmm, well, I have to say this is strange - I think I found the bug. May be that the cause was that I missed to write this line
MissionGroup.add(%trigger);
after creating the trigger. It seems I simply forgot the add it to the missiongroup as it seems. Thanks Gonzo that you tried it - this kept me up searching for the reason :-)

Best,
Martin

Torque Owner Gonzo T. Clown
#6
10/23/2004 (1:25 pm)
Glad to help, I only wish I had actually tried it myself before sending you on a wild goose chase in the TGE code. My apologies for that.

Torque Owner Martin Schultz
#7
10/24/2004 (2:23 am)
Nevermind - in the end you directed me in the right direction! :-) Thanks!

Best, Martin