1 files changed, 43 insertions, 9 deletions

diff --git a/indra/newview/llviewerwindow.cpp b/indra/newview/llviewerwindow.cpp
index b9243f3fdb..7ab98d6633 100755
--- a/indra/newview/llviewerwindow.cpp
+++ b/indra/newview/llviewerwindow.cpp
@@ -225,6 +225,8 @@ LLFrameTimer	gAwayTriggerTimer;
 BOOL			gShowOverlayTitle = FALSE;
 
 LLViewerObject*  gDebugRaycastObject = NULL;
+LLVOPartGroup* gDebugRaycastParticle = NULL;
+LLVector3		gDebugRaycastParticleIntersection;
 LLVector3       gDebugRaycastIntersection;
 LLVector2       gDebugRaycastTexCoord;
 LLVector3       gDebugRaycastNormal;
@@ -2811,6 +2813,8 @@ void LLViewerWindow::updateUI()
 											  &gDebugRaycastBinormal,
 											  &gDebugRaycastStart,
 											  &gDebugRaycastEnd);
+
+		gDebugRaycastParticle = gPipeline.lineSegmentIntersectParticle(gDebugRaycastStart, gDebugRaycastEnd, &gDebugRaycastParticleIntersection, NULL);
 	}
 
 	updateMouseDelta();
@@ -3633,7 +3637,7 @@ void LLViewerWindow::pickAsync(S32 x, S32 y_from_bot, MASK mask, void (*callback
 		pick_transparent = TRUE;
 	}
 
-	LLPickInfo pick_info(LLCoordGL(x, y_from_bot), mask, pick_transparent, TRUE, callback);
+	LLPickInfo pick_info(LLCoordGL(x, y_from_bot), mask, pick_transparent, FALSE, TRUE, callback);
 	schedulePick(pick_info);
 }
 
@@ -3689,7 +3693,7 @@ void LLViewerWindow::returnEmptyPicks()
 }
 
 // Performs the GL object/land pick.
-LLPickInfo LLViewerWindow::pickImmediate(S32 x, S32 y_from_bot,  BOOL pick_transparent)
+LLPickInfo LLViewerWindow::pickImmediate(S32 x, S32 y_from_bot,  BOOL pick_transparent, BOOL pick_particle)
 {
 	BOOL in_build_mode = LLFloaterReg::instanceVisible("build");
 	if (in_build_mode || LLDrawPoolAlpha::sShowDebugAlpha)
@@ -3698,10 +3702,10 @@ LLPickInfo LLViewerWindow::pickImmediate(S32 x, S32 y_from_bot,  BOOL pick_trans
 		// "Show Debug Alpha" means no object actually transparent
 		pick_transparent = TRUE;
 	}
-
+	
 	// shortcut queueing in mPicks and just update mLastPick in place
 	MASK	key_mask = gKeyboard->currentMask(TRUE);
-	mLastPick = LLPickInfo(LLCoordGL(x, y_from_bot), key_mask, pick_transparent, TRUE, NULL);
+	mLastPick = LLPickInfo(LLCoordGL(x, y_from_bot), key_mask, pick_transparent, pick_particle, TRUE, NULL);
 	mLastPick.fetchResults();
 
 	return mLastPick;
@@ -5107,13 +5111,15 @@ LLPickInfo::LLPickInfo()
 	  mNormal(),
 	  mBinormal(),
 	  mHUDIcon(NULL),
-	  mPickTransparent(FALSE)
+	  mPickTransparent(FALSE),
+	  mPickParticle(FALSE)
 {
 }
 
 LLPickInfo::LLPickInfo(const LLCoordGL& mouse_pos, 
 		       MASK keyboard_mask, 
 		       BOOL pick_transparent,
+			   BOOL pick_particle,
 		       BOOL pick_uv_coords,
 		       void (*pick_callback)(const LLPickInfo& pick_info))
 	: mMousePt(mouse_pos),
@@ -5128,7 +5134,8 @@ LLPickInfo::LLPickInfo(const LLCoordGL& mouse_pos,
 	  mNormal(),
 	  mBinormal(),
 	  mHUDIcon(NULL),
-	  mPickTransparent(pick_transparent)
+	  mPickTransparent(pick_transparent),
+	  mPickParticle(pick_particle)
 {
 }
 
@@ -5142,20 +5149,34 @@ void LLPickInfo::fetchResults()
 	LLHUDIcon* hit_icon = gViewerWindow->cursorIntersectIcon(mMousePt.mX, mMousePt.mY, 512.f, &intersection);
 	
 	F32 icon_dist = 0.f;
+	LLVector3 start;
+	LLVector3 end;
+	LLVector3 particle_end;
+
 	if (hit_icon)
 	{
 		icon_dist = (LLViewerCamera::getInstance()->getOrigin()-intersection).magVec();
 	}
 	LLViewerObject* hit_object = gViewerWindow->cursorIntersect(mMousePt.mX, mMousePt.mY, 512.f,
 									NULL, -1, mPickTransparent, &face_hit,
-									&intersection, &uv, &normal, &binormal);
+									&intersection, &uv, &normal, &binormal, &start, &end);
 	
 	mPickPt = mMousePt;
 
 	U32 te_offset = face_hit > -1 ? face_hit : 0;
 
-	//unproject relative clicked coordinate from window coordinate using GL
-	
+	if (mPickParticle)
+	{ //get the end point of line segement to use for particle raycast
+		if (hit_object)
+		{
+			particle_end = intersection;
+		}
+		else
+		{
+			particle_end = end;
+		}
+	}
+
 	LLViewerObject* objectp = hit_object;
 
 	if (hit_icon && 
@@ -5166,6 +5187,7 @@ void LLPickInfo::fetchResults()
 		mHUDIcon = hit_icon;
 		mPickType = PICK_ICON;
 		mPosGlobal = mHUDIcon->getPositionGlobal();
+
 	}
 	else if (objectp)
 	{
@@ -5210,6 +5232,18 @@ void LLPickInfo::fetchResults()
 		}
 	}
 	
+	if (mPickParticle)
+	{ //search for closest particle to click origin out to intersection point
+		S32 part_face = -1;
+
+		LLVOPartGroup* group = gPipeline.lineSegmentIntersectParticle(start, particle_end, NULL, &part_face);
+		if (group)
+		{
+			mParticleOwnerID = group->getPartOwner(part_face);
+			mParticleSourceID = group->getPartSource(part_face);
+		}
+	}
+
 	if (mPickCallback)
 	{
 		mPickCallback(*this);