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diff --git a/indra/newview/llphysicsshapebuilderutil.h b/indra/newview/llphysicsshapebuilderutil.h
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+/** 
+ * @file llphysicsshapebuilder.h
+ * @brief Generic system to convert LL(Physics)VolumeParams to physics shapes
+ *
+ * $LicenseInfo:firstyear=2001&license=viewerlgpl$
+ * Second Life Viewer Source Code
+ * Copyright (C) 2010, Linden Research, Inc.
+ * 
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation;
+ * version 2.1 of the License only.
+ * 
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ * 
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+ * 
+ * Linden Research, Inc., 945 Battery Street, San Francisco, CA  94111  USA
+ * $/LicenseInfo$
+ */
+
+#ifndef LL_PHYSICS_SHAPE_BUILDER_H
+#define LL_PHYSICS_SHAPE_BUILDER_H
+
+#include "indra_constants.h"
+#include "llvolume.h"
+
+#define USE_SHAPE_QUANTIZATION 0
+
+#define SHAPE_BUILDER_DEFAULT_VOLUME_DETAIL 1
+
+#define SHAPE_BUILDER_IMPLICIT_THRESHOLD_HOLLOW 0.10f
+#define SHAPE_BUILDER_IMPLICIT_THRESHOLD_HOLLOW_SPHERES 0.90f
+#define SHAPE_BUILDER_IMPLICIT_THRESHOLD_PATH_CUT 0.05f
+#define SHAPE_BUILDER_IMPLICIT_THRESHOLD_TAPER 0.05f
+#define SHAPE_BUILDER_IMPLICIT_THRESHOLD_TWIST 0.09f
+#define SHAPE_BUILDER_IMPLICIT_THRESHOLD_SHEAR 0.05f
+
+const F32 SHAPE_BUILDER_ENTRY_SNAP_SCALE_BIN_SIZE = 0.15f;
+const F32 SHAPE_BUILDER_ENTRY_SNAP_PARAMETER_BIN_SIZE = 0.010f;
+const F32 SHAPE_BUILDER_CONVEXIFICATION_SIZE = 2.f * COLLISION_TOLERANCE;
+const F32 SHAPE_BUILDER_MIN_GEOMETRY_SIZE = 0.5f * COLLISION_TOLERANCE;
+
+class LLPhysicsVolumeParams : public LLVolumeParams
+{
+public:
+
+	LLPhysicsVolumeParams( const LLVolumeParams& params, bool forceConvex ) : 
+		LLVolumeParams( params ),
+		mForceConvex(forceConvex) {}
+
+	bool operator==(const LLPhysicsVolumeParams &params) const
+	{
+		return ( LLVolumeParams::operator==(params) && (mForceConvex == params.mForceConvex) );
+	}
+
+	bool operator!=(const LLPhysicsVolumeParams &params) const
+	{
+		return !operator==(params);
+	}
+
+	bool operator<(const LLPhysicsVolumeParams &params) const
+	{
+		if ( LLVolumeParams::operator!=(params) )
+		{
+			return LLVolumeParams::operator<(params);
+		}
+		return (params.mForceConvex == false) && (mForceConvex == true);	
+	}
+
+	bool shouldForceConvex() const { return mForceConvex; }
+
+private:
+	bool mForceConvex;
+};
+
+
+class LLPhysicsShapeBuilderUtil
+{
+public:
+
+	class PhysicsShapeSpecification
+	{
+	public:
+		enum ShapeType
+		{
+			// Primitive types
+			BOX,
+			SPHERE,
+			CYLINDER,
+
+			USER_CONVEX,	// User specified they wanted the convex hull of the volume
+
+			PRIM_CONVEX,	// Either a volume that is inherently convex but not a primitive type, or a shape
+							// with dimensions such that will convexify it anyway.
+
+ 			SCULPT,			// Special case for traditional sculpts--they are the convex hull of a single particular set of volume params
+
+			USER_MESH,		// A user mesh. May or may not contain a convex decomposition.
+
+			PRIM_MESH,		// A non-convex volume which we have to represent accurately
+
+			INVALID
+		};
+
+		PhysicsShapeSpecification() : 
+		mType( INVALID ),
+		mScale( 0.f, 0.f, 0.f ),
+		mCenter( 0.f, 0.f, 0.f ) {}
+		
+		bool isConvex() { return (mType != USER_MESH && mType != PRIM_MESH && mType != INVALID); }
+		bool isMesh() { return (mType == USER_MESH) || (mType == PRIM_MESH); }
+
+		ShapeType getType() { return mType; }
+		const LLVector3& getScale() { return mScale; }
+		const LLVector3& getCenter() { return mCenter; }
+
+	private:
+		friend class LLPhysicsShapeBuilderUtil;
+
+		ShapeType	mType;
+
+		// Dimensions of an AABB around the shape
+		LLVector3	mScale;
+
+		// Offset of shape from origin of primitive's reference frame
+		LLVector3	mCenter;
+	};
+
+	static void determinePhysicsShape( const LLPhysicsVolumeParams& volume_params, const LLVector3& scale, PhysicsShapeSpecification& specOut );
+};
+
+#endif //LL_PHYSICS_SHAPE_BUILDER_H