Reset joint positions after detaching a rigged model

indra/llcharacter/lljoint.cpp

@@ -239,6 +239,17 @@ void LLJoint::setPosition( const LLVector3& pos )
 	}
 }
 
+
+//--------------------------------------------------------------------
+// setPosition()
+//--------------------------------------------------------------------
+void LLJoint::setDefaultFromCurrentXform( void )
+{
+	mDefaultXform = mXform;
+	touch(MATRIX_DIRTY | POSITION_DIRTY);
+	
+}
+
 //--------------------------------------------------------------------
 // storeCurrentXform()
 //--------------------------------------------------------------------
@@ -254,6 +265,14 @@ void LLJoint::restoreOldXform( void )
 {
 	mXform = mOldXform;
 }
+//--------------------------------------------------------------------
+// restoreOldXform()
+//--------------------------------------------------------------------
+void LLJoint::restoreToDefaultXform( void )
+{	
+	mXform = mDefaultXform;
+	setPosition( mXform.getPosition() );	
+}
 
 //--------------------------------------------------------------------
 // getWorldPosition()

indra/llcharacter/lljoint.h

@@ -87,6 +87,7 @@ protected:
 	// explicit transformation members
 	LLXformMatrix		mXform;
 	LLXformMatrix		mOldXform;
+	LLXformMatrix		mDefaultXform;
 
 public:
 	U32				mDirtyFlags;
@@ -137,7 +138,9 @@ public:
 	// get/set local position
 	const LLVector3& getPosition();
 	void setPosition( const LLVector3& pos );
-
+	
+	void setDefaultPosition( const LLVector3& pos );
+	
 	// get/set world position
 	LLVector3 getWorldPosition();
 	LLVector3 getLastWorldPosition();
@@ -181,6 +184,9 @@ public:
 	void setJointNum(S32 joint_num) { mJointNum = joint_num; }
 	
 	void restoreOldXform( void );
+	void restoreToDefaultXform( void );
+	void setDefaultFromCurrentXform( void );
+	
 	void storeCurrentXform( const LLVector3& pos );
 };
 #endif // LL_LLJOINT_H

indra/newview/llvoavatar.cpp

@@ -1631,7 +1631,8 @@ BOOL LLVOAvatar::setupBone(const LLVOAvatarBoneInfo* info, LLViewerJoint* parent
 							 info->mRot.mV[VZ], LLQuaternion::XYZ));
 	joint->setScale(info->mScale);
 
-
+	joint->setDefaultFromCurrentXform();
+	
 	if (info->mIsJoint)
 	{
 		joint->setSkinOffset( info->mPivot );
@@ -4784,6 +4785,38 @@ void LLVOAvatar::resetJointPositions( void )
 		mSkeleton[i].restoreOldXform();
 	}
 }
+//-----------------------------------------------------------------------------
+// resetJointPositionsToDefault
+//-----------------------------------------------------------------------------
+void LLVOAvatar::resetJointPositionsToDefault( void )
+{
+	const LLVector3& avPos = getCharacterPosition();
+	
+	//Reposition the pelvis
+	LLJoint* pPelvis = mRoot.findJoint("mPelvis");
+	if ( pPelvis )
+	{
+		pPelvis->setPosition( avPos + pPelvis->getPosition() );
+	}
+	else 
+	{
+		llwarns<<"Can't get pelvis joint."<<llendl;	
+		return;
+	}
+
+	//Subsequent joints are relative to pelvis
+	for( S32 i = 0; i < (S32)mNumJoints; ++i )
+	{
+		LLJoint* pJoint = (LLJoint*)&mSkeleton[i];
+		//restore joints to default positions, however skip over the pelvis
+		if ( pJoint && pPelvis != pJoint )
+		{
+			pJoint->restoreToDefaultXform();
+		}
+	}
+}
+
+
 //-----------------------------------------------------------------------------
 // getCharacterPosition()
 //-----------------------------------------------------------------------------

indra/newview/llvoavatar.h

@@ -171,6 +171,7 @@ public:
 	virtual LLJoint*     	getRootJoint() { return &mRoot; }
 	
 	void					resetJointPositions( void );
+	void					resetJointPositionsToDefault( void );
 	
 	virtual const char*		getAnimationPrefix() { return "avatar"; }
 	virtual const LLUUID&   getID();

indra/newview/llvoavatarself.cpp

@@ -62,6 +62,8 @@
 #include "llviewerstats.h"
 #include "llviewerregion.h"
 #include "llappearancemgr.h"
+#include "llmeshrepository.h"
+#include "llvovolume.h"
 
 #if LL_MSVC
 // disable boost::lexical_cast warning
@@ -655,6 +657,10 @@ LLJoint *LLVOAvatarSelf::getJoint(const std::string &name)
 	return LLVOAvatar::getJoint(name);
 }
 
+void LLVOAvatarSelf::resetJointPositions( void )
+{
+	return LLVOAvatar::resetJointPositionsToDefault();
+}
 // virtual
 BOOL LLVOAvatarSelf::setVisualParamWeight(LLVisualParam *which_param, F32 weight, BOOL upload_bake )
 {
@@ -1119,8 +1125,22 @@ const LLViewerJointAttachment *LLVOAvatarSelf::attachObject(LLViewerObject *view
 BOOL LLVOAvatarSelf::detachObject(LLViewerObject *viewer_object)
 {
 	const LLUUID attachment_id = viewer_object->getAttachmentItemID();
-	if (LLVOAvatar::detachObject(viewer_object))
+	if ( LLVOAvatar::detachObject(viewer_object) )
 	{
+		//If a VO has a skin that we'll reset the joint positions to their default
+		if ( viewer_object->mDrawable )
+		{
+			LLVOVolume* pVObj = viewer_object->mDrawable->getVOVolume();
+			if ( pVObj )
+			{
+				const LLMeshSkinInfo* pSkinData = gMeshRepo.getSkinInfo( pVObj->getVolume()->getParams().getSculptID() );
+				if ( pSkinData )
+				{
+					resetJointPositions();
+				}				
+			}
+		}
+		
 		// the simulator should automatically handle permission revocation
 		
 		stopMotionFromSource(attachment_id);

indra/newview/llvoavatarself.h

@@ -83,7 +83,9 @@ public:
 	/*virtual*/ void 		stopMotionFromSource(const LLUUID& source_id);
 	/*virtual*/ void 		requestStopMotion(LLMotion* motion);
 	/*virtual*/ LLJoint*	getJoint(const std::string &name);
-
+	
+				void		resetJointPositions( void );
+	
 	/*virtual*/ BOOL setVisualParamWeight(LLVisualParam *which_param, F32 weight, BOOL upload_bake = FALSE );
 	/*virtual*/ BOOL setVisualParamWeight(const char* param_name, F32 weight, BOOL upload_bake = FALSE );
 	/*virtual*/ BOOL setVisualParamWeight(S32 index, F32 weight, BOOL upload_bake = FALSE );