C++ TerrainBlock::castRay方法代码示例

bool SceneCullingState::isOccludedByTerrain( SceneObject* object ) const
{
   PROFILE_SCOPE( SceneCullingState_isOccludedByTerrain );

   // Don't try to occlude globally bounded objects.
   if( object->isGlobalBounds() )
      return false;

   const Vector< SceneObject* >& terrains = getSceneManager()->getContainer()->getTerrains();
   const U32 numTerrains = terrains.size();

   for( U32 terrainIdx = 0; terrainIdx < numTerrains; ++ terrainIdx )
   {
      TerrainBlock* terrain = dynamic_cast< TerrainBlock* >( terrains[ terrainIdx ] );
      if( !terrain )
         continue;

      MatrixF terrWorldTransform = terrain->getWorldTransform();

      Point3F localCamPos = getCameraState().getViewPosition();
      terrWorldTransform.mulP(localCamPos);
      F32 height;
      terrain->getHeight( Point2F( localCamPos.x, localCamPos.y ), &height );
      bool aboveTerrain = ( height <= localCamPos.z );

      // Don't occlude if we're below the terrain.  This prevents problems when
      //  looking out from underground bases...
      if( !aboveTerrain )
         continue;

      const Box3F& oBox = object->getObjBox();
      F32 minSide = getMin(oBox.len_x(), oBox.len_y());
      if (minSide > 85.0f)
         continue;

      const Box3F& rBox = object->getWorldBox();
      Point3F ul(rBox.minExtents.x, rBox.minExtents.y, rBox.maxExtents.z);
      Point3F ur(rBox.minExtents.x, rBox.maxExtents.y, rBox.maxExtents.z);
      Point3F ll(rBox.maxExtents.x, rBox.minExtents.y, rBox.maxExtents.z);
      Point3F lr(rBox.maxExtents.x, rBox.maxExtents.y, rBox.maxExtents.z);

      terrWorldTransform.mulP(ul);
      terrWorldTransform.mulP(ur);
      terrWorldTransform.mulP(ll);
      terrWorldTransform.mulP(lr);

      Point3F xBaseL0_s = ul - localCamPos;
      Point3F xBaseL0_e = lr - localCamPos;
      Point3F xBaseL1_s = ur - localCamPos;
      Point3F xBaseL1_e = ll - localCamPos;

      static F32 checkPoints[3] = {0.75, 0.5, 0.25};
      RayInfo rinfo;
      for( U32 i = 0; i < 3; i ++ )
      {
         Point3F start = (xBaseL0_s * checkPoints[i]) + localCamPos;
         Point3F end   = (xBaseL0_e * checkPoints[i]) + localCamPos;

         if (terrain->castRay(start, end, &rinfo))
            continue;

         terrain->getHeight(Point2F(start.x, start.y), &height);
         if ((height <= start.z) == aboveTerrain)
            continue;

         start = (xBaseL1_s * checkPoints[i]) + localCamPos;
         end   = (xBaseL1_e * checkPoints[i]) + localCamPos;

         if (terrain->castRay(start, end, &rinfo))
            continue;

         Point3F test = (start + end) * 0.5;
         if (terrain->castRay(localCamPos, test, &rinfo) == false)
            continue;

         return true;
      }
   }

   return false;
}

void EditTSCtrl::onRightMouseDown(const GuiEvent & event)
{
   // always process the right mouse event first...

   mRightMouseDown = true;
   mLastBorderMoveTime = 0;

   make3DMouseEvent(mLastEvent, event);
   on3DRightMouseDown(mLastEvent);

   if(!mLeftMouseDown && mRightMousePassThru && mProfile->mCanKeyFocus)
   {
      GuiCanvas *pCanvas = getRoot();
      if( !pCanvas )
         return;

      PlatformWindow *pWindow = static_cast<GuiCanvas*>(getRoot())->getPlatformWindow();
      if( !pWindow )
         return;

      PlatformCursorController *pController = pWindow->getCursorController();
      if( !pController )
         return;

      // ok, gotta disable the mouse
      // script functions are lockMouse(true); Canvas.cursorOff();
      pWindow->setMouseLocked(true);
      pCanvas->setCursorON( false );

      if(mDisplayType != DisplayTypePerspective)
      {
         mouseLock();
         mLastMousePos = event.mousePoint;
         pCanvas->setForceMouseToGUI(true);
         mLastMouseClamping = pCanvas->getClampTorqueCursor();
         pCanvas->setClampTorqueCursor(false);
      }

      if(mDisplayType == DisplayTypeIsometric)
      {
         // Store the screen center point on the terrain for a possible rotation
         TerrainBlock* activeTerrain = getActiveTerrain();
         if( activeTerrain )
         {
            F32 extx, exty;
            if(event.modifier & SI_SHIFT)
            {
               extx = F32(event.mousePoint.x);
               exty = F32(event.mousePoint.y);
            }
            else
            {
               extx = getExtent().x * 0.5;
               exty = getExtent().y * 0.5;
            }
            Point3F sp(extx, exty, 0.0f); // Near plane projection
            Point3F start;
            unproject(sp, &start);

            Point3F end = start + mLastEvent.vec * 4000.0f;
            Point3F tStartPnt, tEndPnt;
            activeTerrain->getTransform().mulP(start, &tStartPnt);
            activeTerrain->getTransform().mulP(end, &tEndPnt);

            RayInfo info;
            bool result = activeTerrain->castRay(tStartPnt, tEndPnt, &info);
            if(result)
            {
               info.point.interpolate(start, end, info.t);
               mIsoCamRotCenter = info.point;
            }
            else
            {
               mIsoCamRotCenter = start;
            }
         }
         else
         {
            F32 extx = getExtent().x * 0.5;
            F32 exty = getExtent().y * 0.5;
            Point3F sp(extx, exty, 0.0f); // Near plane projection
            unproject(sp, &mIsoCamRotCenter);
         }
      }

      setFirstResponder();
   }
}