C++ Box3F::extend方法代码示例

void AppMesh::computeBounds(Box3F& bounds)
{
   bounds = Box3F::Invalid;

   if ( isSkin() )
   {
      // Need to skin the mesh before we can compute the bounds

      // Setup bone transforms
      Vector<MatrixF> boneTransforms;
      boneTransforms.setSize( nodeIndex.size() );
      for (S32 iBone = 0; iBone < boneTransforms.size(); iBone++)
      {
         MatrixF nodeMat = bones[iBone]->getNodeTransform( TSShapeLoader::DefaultTime );
         TSShapeLoader::zapScale(nodeMat);
         boneTransforms[iBone].mul( nodeMat, initialTransforms[iBone] );
      }

      // Multiply verts by weighted bone transforms
      for (S32 iVert = 0; iVert < initialVerts.size(); iVert++)
         points[iVert].set( Point3F::Zero );

      for (S32 iWeight = 0; iWeight < vertexIndex.size(); iWeight++)
      {
         const S32& vertIndex = vertexIndex[iWeight];
         const MatrixF& deltaTransform = boneTransforms[ boneIndex[iWeight] ];

         Point3F v;
         deltaTransform.mulP( initialVerts[vertIndex], &v );
         v *= weight[iWeight];

         points[vertIndex] += v;
      }

      // compute bounds for the skinned mesh
      for (S32 iVert = 0; iVert < initialVerts.size(); iVert++)
         bounds.extend( points[iVert] );
   }
   else
   {
      MatrixF transform = getMeshTransform(TSShapeLoader::DefaultTime);
      TSShapeLoader::zapScale(transform);

      for (S32 iVert = 0; iVert < points.size(); iVert++)
      {
         Point3F p;
         transform.mulP(points[iVert], &p);
         bounds.extend(p);
      }
   }
}

void T3DSceneComponent::_ComputeObjectBox()
{
   _objectBox->set(Box3F(10E30f, 10E30f, 10E30f, -10E30f, -10E30f, -10E30f));
   bool gotone = false;
   for (T3DSceneClient * walk = _sceneClientList; walk != NULL; walk = walk->getNextSceneClient())
   {
      ISolid3D * solid = dynamic_cast<ISolid3D*>(walk);
      if (solid == NULL)
         continue;

      Box3F box = solid->getObjectBox();
      if (solid->getTransform3D() != NULL)
      {
         MatrixF mat;
         solid->getTransform3D()->getObjectMatrix(mat, true);
         mat.mul(box);
      }
      box.extend(_objectBox->get().min);
      box.extend(_objectBox->get().max);
      _objectBox->set(box);
      gotone = true;
   }
   if (!gotone)
      _objectBox->set(Box3F());

   setDirtyObjectBox(false);
   setDirtyWorldBox(true);
}

void T3DSceneComponent::AddSceneClient(T3DSceneClient * sceneClient)
{
   AssertFatal(sceneClient,"Cannot add a NULL scene client");

   // add to the front of the list
   sceneClient->setNextSceneClient(_sceneClientList);
   _sceneClientList = sceneClient;

   // extend object box
   ISolid3D * solid = dynamic_cast<ISolid3D*>(sceneClient);
   if (solid != NULL)
   {
      if (isObjectBoxLocked())
         setDirtyObjectBox(true);
      else
      {
         Box3F box = solid->getObjectBox();
         if (solid->getTransform3D() != NULL)
         {
            MatrixF mat;
            solid->getTransform3D()->getObjectMatrix(mat, true);
            mat.mul(box);
         }
         box.extend(_objectBox->get().min);
         box.extend(_objectBox->get().max);
         _objectBox->set(box);
      }

      // policy is that we become parent transform
      if (solid->getTransform3D() != NULL && solid->getTransform3D()->isChildOf(_transform, true))
         solid->getTransform3D()->setParentTransform(_transform);
   }
}

void DecalRoad::_captureVerts()
{  
   PROFILE_SCOPE( DecalRoad_captureVerts );

   //Con::warnf( "%s - captureVerts", isServerObject() ? "server" : "client" );

   if ( isServerObject() )
   {
      //Con::errorf( "DecalRoad::_captureVerts - called on the server side!" );
      return;
   }

   if ( mEdges.size() == 0 )
      return;

   //
   // Construct ClippedPolyList objects for each pair
   // of roadEdges.
   // Use them to capture Terrain verts.
   //
   SphereF sphere;
   RoadEdge *edge = NULL;
   RoadEdge *nextEdge = NULL;

   mTriangleCount = 0;
   mVertCount = 0;

   Vector<ClippedPolyList> clipperList;

   for ( U32 i = 0; i < mEdges.size() - 1; i++ )
   {      
      Box3F box;
      edge = &mEdges[i];
      nextEdge = &mEdges[i+1];

      box.minExtents = edge->p1;
      box.maxExtents = edge->p1;
      box.extend( edge->p0 );
      box.extend( edge->p2 );
      box.extend( nextEdge->p0 );
      box.extend( nextEdge->p1 );
      box.extend( nextEdge->p2 );
      box.minExtents.z -= 5.0f;
      box.maxExtents.z += 5.0f;

      sphere.center = ( nextEdge->p1 + edge->p1 ) * 0.5f;
      sphere.radius = 100.0f; // NOTE: no idea how to calculate this

      ClippedPolyList clipper;
      clipper.mNormal.set(0.0f, 0.0f, 0.0f);
      VectorF n;
      PlaneF plane0, plane1;

      // Construct Back Plane
      n = edge->p2 - edge->p0;
      n.normalize();
      n = mCross( n, edge->uvec );      
      plane0.set( edge->p0, n );   
      clipper.mPlaneList.push_back( plane0 );

      // Construct Front Plane
      n = nextEdge->p2 - nextEdge->p0;
      n.normalize();
      n = -mCross( edge->uvec, n );
      plane1.set( nextEdge->p0, -n );
      //clipper.mPlaneList.push_back( plane1 );

      // Test if / where the planes intersect.
      bool discardLeft = false;
      bool discardRight = false;
      Point3F iPos; 
      VectorF iDir;

      if ( plane0.intersect( plane1, iPos, iDir ) )
      {                  
         Point2F iPos2F( iPos.x, iPos.y );
         Point2F cPos2F( edge->p1.x, edge->p1.y );
         Point2F rVec2F( edge->rvec.x, edge->rvec.y );

         Point2F iVec2F = iPos2F - cPos2F;
         F32 iLen = iVec2F.len();
         iVec2F.normalize();

         if ( iLen < edge->width * 0.5f )
         {
            F32 dot = mDot( rVec2F, iVec2F );

            // The clipping planes intersected on the right side,
            // discard the right side clipping plane.
            if ( dot > 0.0f )
               discardRight = true;         
            // The clipping planes intersected on the left side,
            // discard the left side clipping plane.
            else
               discardLeft = true;
         }
      }

      // Left Plane
      if ( !discardLeft )
//.........这里部分代码省略.........