7 files changed, 115 insertions, 5 deletions
diff --git a/indra/newview/llfloaterobjectweights.cpp b/indra/newview/llfloaterobjectweights.cpp
index 80a753757e..d39a93991f 100644
--- a/indra/newview/llfloaterobjectweights.cpp
+++ b/indra/newview/llfloaterobjectweights.cpp
@@ -34,6 +34,15 @@
 
 #include "llselectmgr.h"
 #include "llviewerparcelmgr.h"
+#include "llviewerregion.h"
+
+struct LLCrossParcelFunctor : public LLSelectedObjectFunctor
+{
+	/*virtual*/ bool apply(LLViewerObject* obj)
+	{
+		return obj->crossesParcelBounds();
+	}
+};
 
 /**
  * Class LLLandImpactsObserver
@@ -159,13 +168,30 @@ void LLFloaterObjectWeights::refresh()
 		mSelectedObjects->setText(llformat("%d", link_count));
 		mSelectedPrims->setText(llformat("%d", prim_count));
 
-		LLViewerObject* selected_object = mObjectSelection->getPrimaryObject();
-		if (selected_object)
+		LLCrossParcelFunctor func;
+		if (LLSelectMgr::getInstance()->getSelection()->applyToRootObjects(&func, true))
 		{
-			// Select a parcel at the currently selected object's position.
-			LLViewerParcelMgr::getInstance()->selectParcelAt(selected_object->getPositionGlobal());
+			// Some of the selected objects cross parcel bounds.
+			// We don't display land impacts in this case.
+			const std::string text = getString("nothing_selected");
+
+			mSelectedOnLand->setText(text);
+			mRezzedOnLand->setText(text);
+			mRemainingCapacity->setText(text);
+			mTotalCapacity->setText(text);
 
-			toggleLandImpactsLoadingIndicators(true);
+			toggleLandImpactsLoadingIndicators(false);
+		}
+		else
+		{
+			LLViewerObject* selected_object = mObjectSelection->getFirstObject();
+			if (selected_object)
+			{
+				// Select a parcel at the currently selected object's position.
+				LLViewerParcelMgr::getInstance()->selectParcelAt(selected_object->getPositionGlobal());
+
+				toggleLandImpactsLoadingIndicators(true);
+			}
 		}
 	}
 }
diff --git a/indra/newview/llviewerobject.cpp b/indra/newview/llviewerobject.cpp
index b5fdca632b..34c73ee739 100644
--- a/indra/newview/llviewerobject.cpp
+++ b/indra/newview/llviewerobject.cpp
@@ -628,6 +628,20 @@ void LLViewerObject::constructAndAddReturnable( std::vector<PotentialReturnableO
 	}
 }
 
+bool LLViewerObject::crossesParcelBounds()
+{
+	std::vector<LLBBox> boxes;
+	boxes.push_back(LLBBox(getPositionRegion(), getRotationRegion(), getScale() * -0.5f, getScale() * 0.5f).getAxisAligned());
+	for (child_list_t::iterator iter = mChildList.begin();
+		 iter != mChildList.end(); iter++)
+	{
+		LLViewerObject* child = *iter;
+		boxes.push_back(LLBBox(child->getPositionRegion(), child->getRotationRegion(), child->getScale() * -0.5f, child->getScale() * 0.5f).getAxisAligned());
+	}
+
+	return mRegionp && mRegionp->objectsCrossParcel(boxes);
+}
+
 BOOL LLViewerObject::setParent(LLViewerObject* parent)
 {
 	if(mParent != parent)
diff --git a/indra/newview/llviewerobject.h b/indra/newview/llviewerobject.h
index 1828a64917..f27b825bbe 100644
--- a/indra/newview/llviewerobject.h
+++ b/indra/newview/llviewerobject.h
@@ -243,6 +243,10 @@ public:
 	void buildReturnablesForChildrenVO( std::vector<PotentialReturnableObject>& returnables, LLViewerObject* pChild, LLViewerRegion* pTargetRegion );
 	void constructAndAddReturnable( std::vector<PotentialReturnableObject>& returnables, LLViewerObject* pChild, LLViewerRegion* pTargetRegion );
 
+	// This method returns true if the object crosses
+	// any parcel bounds in the region.
+	bool crossesParcelBounds();
+
 	/*
 	// This method will scan through this object, and then query the
 	// selection manager to see if the local agent probably has the
diff --git a/indra/newview/llviewerparceloverlay.cpp b/indra/newview/llviewerparceloverlay.cpp
index eff16b6a6e..e619b89f9b 100644
--- a/indra/newview/llviewerparceloverlay.cpp
+++ b/indra/newview/llviewerparceloverlay.cpp
@@ -201,6 +201,65 @@ bool LLViewerParcelOverlay::encroachesOnUnowned(const std::vector<LLBBox>& boxes
 	return false;
 }
 
+bool LLViewerParcelOverlay::encroachesOnNearbyParcel(const std::vector<LLBBox>& boxes) const
+{
+	// boxes are expected to already be axis aligned
+	for (U32 i = 0; i < boxes.size(); ++i)
+	{
+		LLVector3 min = boxes[i].getMinAgent();
+		LLVector3 max = boxes[i].getMaxAgent();
+
+		// If an object crosses region borders it crosses a parcel
+		if (   min.mV[VX] < 0
+			|| min.mV[VY] < 0
+			|| max.mV[VX] > REGION_WIDTH_METERS
+			|| max.mV[VY] > REGION_WIDTH_METERS)
+		{
+			return true;
+		}
+
+		S32 left   = S32(llclamp((min.mV[VX] / PARCEL_GRID_STEP_METERS), 0.f, REGION_WIDTH_METERS - 1));
+		S32 right  = S32(llclamp((max.mV[VX] / PARCEL_GRID_STEP_METERS), 0.f, REGION_WIDTH_METERS - 1));
+		S32 bottom = S32(llclamp((min.mV[VY] / PARCEL_GRID_STEP_METERS), 0.f, REGION_WIDTH_METERS - 1));
+		S32 top    = S32(llclamp((max.mV[VY] / PARCEL_GRID_STEP_METERS), 0.f, REGION_WIDTH_METERS - 1));
+
+		const S32 GRIDS_PER_EDGE = mParcelGridsPerEdge;
+
+		for (S32 row = bottom; row <= top; row++)
+		{
+			for (S32 col = left; col <= right; col++)
+			{
+				// This is not the rightmost column
+				if (col < GRIDS_PER_EDGE-1)
+				{
+					U8 east_overlay = mOwnership[row*GRIDS_PER_EDGE+col+1];
+					// If the column to the east of the current one marks
+					// the other parcel's west edge and the box extends
+					// to the west it crosses the parcel border.
+					if ((east_overlay & PARCEL_WEST_LINE) && col < right)
+					{
+						return true;
+					}
+				}
+
+				// This is not the topmost column
+				if (row < GRIDS_PER_EDGE-1)
+				{
+					U8 north_overlay = mOwnership[(row+1)*GRIDS_PER_EDGE+col];
+					// If the row to the north of the current one marks
+					// the other parcel's south edge and the box extends
+					// to the south it crosses the parcel border.
+					if ((north_overlay & PARCEL_SOUTH_LINE) && row < top)
+					{
+						return true;
+					}
+				}
+			}
+		}
+	}
+	return false;
+}
+
 BOOL LLViewerParcelOverlay::isSoundLocal(const LLVector3& pos) const
 {
 	S32 row =    S32(pos.mV[VY] / PARCEL_GRID_STEP_METERS);
diff --git a/indra/newview/llviewerparceloverlay.h b/indra/newview/llviewerparceloverlay.h
index 3c6794e7d0..7445d5bf1d 100644
--- a/indra/newview/llviewerparceloverlay.h
+++ b/indra/newview/llviewerparceloverlay.h
@@ -61,6 +61,7 @@ public:
 	// bounding boxes which isn't perfect, but is close
 	bool encroachesOwned(const std::vector<LLBBox>& boxes) const;
 	bool encroachesOnUnowned(const std::vector<LLBBox>& boxes) const;
+	bool encroachesOnNearbyParcel(const std::vector<LLBBox>& boxes) const;
 	
 	BOOL			isSoundLocal(const LLVector3& pos) const;
 
diff --git a/indra/newview/llviewerregion.cpp b/indra/newview/llviewerregion.cpp
index 5be2234ec2..7ebfcc2b5a 100644
--- a/indra/newview/llviewerregion.cpp
+++ b/indra/newview/llviewerregion.cpp
@@ -1784,6 +1784,11 @@ bool LLViewerRegion::childrenObjectReturnable( const std::vector<LLBBox>& boxes
 	return result;
 }
 
+bool LLViewerRegion::objectsCrossParcel(const std::vector<LLBBox>& boxes) const
+{
+	return mParcelOverlay && mParcelOverlay->encroachesOnNearbyParcel(boxes);
+}
+
 void LLViewerRegion::getNeighboringRegions( std::vector<LLViewerRegion*>& uniqueRegions )
 {
 	mImpl->mLandp->getNeighboringRegions( uniqueRegions );
diff --git a/indra/newview/llviewerregion.h b/indra/newview/llviewerregion.h
index b3c19ea58d..c86c30b93c 100644
--- a/indra/newview/llviewerregion.h
+++ b/indra/newview/llviewerregion.h
@@ -322,6 +322,7 @@ public:
 
 	bool objectIsReturnable(const LLVector3& pos, const std::vector<LLBBox>& boxes) const;
 	bool childrenObjectReturnable( const std::vector<LLBBox>& boxes ) const;
+	bool objectsCrossParcel(const std::vector<LLBBox>& boxes) const;
 
 	void getNeighboringRegions( std::vector<LLViewerRegion*>& uniqueRegions );