1 files changed, 85 insertions, 0 deletions
diff --git a/mp/src/game/client/bone_merge_cache.h b/mp/src/game/client/bone_merge_cache.h
new file mode 100644
index 00000000..b1802706
--- /dev/null
+++ b/mp/src/game/client/bone_merge_cache.h
@@ -0,0 +1,85 @@
+//========= Copyright Valve Corporation, All rights reserved. ============//
+//
+// Purpose: 
+//
+//=============================================================================//
+
+#ifndef BONE_MERGE_CACHE_H
+#define BONE_MERGE_CACHE_H
+#ifdef _WIN32
+#pragma once
+#endif
+
+
+class C_BaseAnimating;
+class CStudioHdr;
+
+
+#include "mathlib/vector.h"
+
+
+class CBoneMergeCache
+{
+public:
+
+	CBoneMergeCache();
+	
+	void Init( C_BaseAnimating *pOwner );
+
+	// Updates the lookups that let it merge bones quickly.
+	void UpdateCache();
+	
+	// This copies the transform from all bones in the followed entity that have 
+	// names that match our bones.
+	void MergeMatchingBones( int boneMask );
+
+	// copy bones instead of matrices
+	void CopyParentToChild( const Vector parentPos[], const Quaternion parentQ[], Vector childPos[], Quaternion childQ[], int boneMask );
+	void CopyChildToParent( const Vector childPos[], const Quaternion childQ[], Vector parentPos[], Quaternion parentQ[], int boneMask );
+
+	// Returns true if the specified bone is one that gets merged in MergeMatchingBones.
+	int IsBoneMerged( int iBone ) const;
+
+	// Gets the origin for the first merge bone on the parent.
+	bool GetAimEntOrigin( Vector *pAbsOrigin, QAngle *pAbsAngles );
+
+	bool GetRootBone( matrix3x4_t &rootBone );
+
+private:
+
+	// This is the entity that we're keeping the cache updated for.
+	C_BaseAnimating *m_pOwner;
+
+	// All the cache data is based off these. When they change, the cache data is regenerated.
+	// These are either all valid pointers or all NULL.
+	C_BaseAnimating *m_pFollow;
+	CStudioHdr		*m_pFollowHdr;
+	const studiohdr_t	*m_pFollowRenderHdr;
+	CStudioHdr		*m_pOwnerHdr;
+
+	// This is the mask we need to use to set up bones on the followed entity to do the bone merge
+	int				m_nFollowBoneSetupMask;
+
+	// Cache data.
+	class CMergedBone
+	{
+	public:
+		unsigned short m_iMyBone;
+		unsigned short m_iParentBone;
+	};
+
+	CUtlVector<CMergedBone> m_MergedBones;
+	CUtlVector<unsigned char> m_BoneMergeBits;	// One bit for each bone. The bit is set if the bone gets merged.
+};
+
+
+inline int CBoneMergeCache::IsBoneMerged( int iBone ) const
+{
+	if ( m_pOwnerHdr )
+		return m_BoneMergeBits[iBone >> 3] & ( 1 << ( iBone & 7 ) );
+	else
+		return 0;
+}
+
+
+#endif // BONE_MERGE_CACHE_H