merged .hgtags

1 files changed, 59 insertions, 0 deletions

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);