C++ Point3F::isZero方法代码示例

void Projectile::interpolateTick(F32 delta)
{
   Parent::interpolateTick(delta);

   if( mHasExploded )
      return;

   Point3F interpPos = mCurrDeltaBase + mCurrBackDelta * delta;
   Point3F dir = mCurrVelocity;
   if(dir.isZero())
      dir.set(0,0,1);
   else
      dir.normalize();

   MatrixF xform(true);
	xform = MathUtils::createOrientFromDir(dir);
   xform.setPosition(interpPos);
   setRenderTransform(xform);

   // fade out the projectile image
   S32 time = (S32)(mCurrTick - delta);
   if(time > mDataBlock->fadeDelay)
   {
      F32 fade = F32(time - mDataBlock->fadeDelay);
      mFadeValue = 1.0 - (fade / F32(mDataBlock->lifetime));
   }
   else
      mFadeValue = 1.0;

   updateSound();
}

bool Px3World::castRay( const Point3F &startPnt, const Point3F &endPnt, RayInfo *ri, const Point3F &impulse )
{
    
   physx::PxVec3 orig = px3Cast<physx::PxVec3>( startPnt );
   physx::PxVec3 dir = px3Cast<physx::PxVec3>( endPnt - startPnt );
   physx::PxF32 maxDist = dir.magnitude();
   dir.normalize();

   U32 groups = 0xffffffff;
   groups &= ~( PX3_TRIGGER ); // No trigger shapes!

   physx::PxHitFlags outFlags(physx::PxHitFlag::eDISTANCE | physx::PxHitFlag::eIMPACT | physx::PxHitFlag::eNORMAL);
   physx::PxQueryFilterData filterData(physx::PxQueryFlag::eSTATIC|physx::PxQueryFlag::eDYNAMIC);
   filterData.data.word0 = groups;
   physx::PxRaycastBuffer buf;

   if(!mScene->raycast(orig,dir,maxDist,buf,outFlags,filterData))
     return false;
   if(!buf.hasBlock)
    return false;

   const physx::PxRaycastHit hit = buf.block;
   physx::PxRigidActor *actor = hit.actor;
   PhysicsUserData *userData = PhysicsUserData::cast( actor->userData );

   if ( ri )
   {
      ri->object = ( userData != NULL ) ? userData->getObject() : NULL;
      
      if ( ri->object == NULL )

      ri->distance = hit.distance;
      ri->normal = px3Cast<Point3F>( hit.normal );
      ri->point = px3Cast<Point3F>( hit.position );
      ri->t = maxDist / hit.distance;
   }

   if ( impulse.isZero() ||
        !actor->isRigidDynamic() ||
        actor->is<physx::PxRigidDynamic>()->getRigidDynamicFlags() & physx::PxRigidDynamicFlag::eKINEMATIC )
      return true;
  
   physx::PxRigidBody *body = actor->is<physx::PxRigidBody>();
   physx::PxVec3 force = px3Cast<physx::PxVec3>( impulse );
   physx::PxRigidBodyExt::addForceAtPos(*body,force,hit.position,physx::PxForceMode::eIMPULSE);

   return true;
}

void Projectile::emitParticles(const Point3F& from, const Point3F& to, const Point3F& vel, const U32 ms)
{
   if ( mHasExploded )
      return;

   Point3F axis = -vel;

   if( axis.isZero() )
      axis.set( 0.0, 0.0, 1.0 );
   else
      axis.normalize();

   bool fromWater = pointInWater(from);
   bool toWater   = pointInWater(to);

   if (!fromWater && !toWater && bool(mParticleEmitter))                                        // not in water
      mParticleEmitter->emitParticles(from, to, axis, vel, ms);
   else if (fromWater && toWater && bool(mParticleWaterEmitter))                                // in water
      mParticleWaterEmitter->emitParticles(from, to, axis, vel, ms);
   else if (!fromWater && toWater && mDataBlock->splash)     // entering water
   {
      // cast the ray to get the surface point of the water
      RayInfo rInfo;
      if (gClientContainer.castRay(from, to, WaterObjectType, &rInfo))
      {
         MatrixF trans = getTransform();
         trans.setPosition(rInfo.point);

         Splash *splash = new Splash();
         splash->onNewDataBlock(mDataBlock->splash, false);
         splash->setTransform(trans);
         splash->setInitialState(trans.getPosition(), Point3F(0.0, 0.0, 1.0));
         if (!splash->registerObject())
         {
            delete splash;
            splash = NULL;
         }

         // create an emitter for the particles out of water and the particles in water
         if (mParticleEmitter)
            mParticleEmitter->emitParticles(from, rInfo.point, axis, vel, ms);

         if (mParticleWaterEmitter)
            mParticleWaterEmitter->emitParticles(rInfo.point, to, axis, vel, ms);
      }
   }
   else if (fromWater && !toWater && mDataBlock->splash)     // leaving water
   {
      // cast the ray in the opposite direction since that point is out of the water, otherwise
      //  we hit water immediately and wont get the appropriate surface point
      RayInfo rInfo;
      if (gClientContainer.castRay(to, from, WaterObjectType, &rInfo))
      {
         MatrixF trans = getTransform();
         trans.setPosition(rInfo.point);

         Splash *splash = new Splash();
         splash->onNewDataBlock(mDataBlock->splash,false);
         splash->setTransform(trans);
         splash->setInitialState(trans.getPosition(), Point3F(0.0, 0.0, 1.0));
         if (!splash->registerObject())
         {
            delete splash;
            splash = NULL;
         }

         // create an emitter for the particles out of water and the particles in water
         if (mParticleEmitter)
            mParticleEmitter->emitParticles(rInfo.point, to, axis, vel, ms);

         if (mParticleWaterEmitter)
            mParticleWaterEmitter->emitParticles(from, rInfo.point, axis, vel, ms);
      }
   }
}