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/**
* @file llphysicsshapebuilder.h
* @author falcon@lindenlab.com
* @brief Generic system to convert LL(Physics)VolumeParams to physics shapes
*
* $LicenseInfo:firstyear=2010&license=internal$
*
* Copyright (c) 2010, Linden Research, Inc.
*
* The following source code is PROPRIETARY AND CONFIDENTIAL. Use of
* this source code is governed by the Linden Lab Source Code Disclosure
* Agreement ("Agreement") previously entered between you and Linden
* Lab. By accessing, using, copying, modifying or distributing this
* software, you acknowledge that you have been informed of your
* obligations under the Agreement and agree to abide by those obligations.
*
* ALL LINDEN LAB SOURCE CODE IS PROVIDED "AS IS." LINDEN LAB MAKES NO
* WARRANTIES, EXPRESS, IMPLIED OR OTHERWISE, REGARDING ITS ACCURACY,
* COMPLETENESS OR PERFORMANCE.
* $/LicenseInfo$
*/
#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 ¶ms) const
{
return ( LLVolumeParams::operator==(params) && (mForceConvex == params.mForceConvex) );
}
bool operator!=(const LLPhysicsVolumeParams ¶ms) const
{
return !operator==(params);
}
bool operator<(const LLPhysicsVolumeParams ¶ms) 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
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