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GU_Relax.h File Reference
#include "GU_API.h"
#include <GA/GA_Handle.h>
#include <UT/UT_Array.h>
#include <UT/UT_VectorTypes.h>
#include <SYS/SYS_Types.h>
+ Include dependency graph for GU_Relax.h:

Go to the source code of this file.

Macros

#define __GU_Relax_h__
 

Functions

GU_API bool guRelaxPoints (UT_Array< UT_Vector3 > &newpositions, const GA_Detail *gdp, const GA_Range &relaxrange, GEO_PointTreeGAOffset &pttree, const GA_ROHandleV3 &normalattrib, const UT_Vector3 &normalvalue, const GA_ROHandleF &radiusattrib, const fpreal radiusvalue, const GA_ROHandleF &maxstepattrib=GA_ROHandleF(), const fpreal stepweight=1.0, const bool scaleattrib=false)
 
GU_API bool guRelaxPoints3D (UT_Array< UT_Vector3 > &newpositions, const GA_Detail *gdp, const GA_Range &relaxrange, GEO_PointTreeGAOffset &pttree, const GA_ROHandleF &radiusattrib, const fpreal radiusvalue, const GA_ROHandleF &maxstepattrib=GA_ROHandleF(), const fpreal stepweight=1.0, const bool scaleattrib=false)
 
GU_API bool guRelaxPoints1D (UT_Array< UT_Vector3 > &newpositions, const GA_Detail *gdp, const GA_Range &relaxrange, const GA_ROHandleF &radiusattrib, fpreal radiusvalue, const GA_RWHandleV3 &uvwattrib, const GEO_Face &face, const fpreal stepweight=1.0)
 
GU_API bool guRelaxPoints2D (UT_Array< UT_Vector2 > &newpositions, const UT_Array< UT_Vector2 > &oldpositions, UT_KDTree &pttree, const UT_Array< float > &radii, const fpreal radiusvalue, const bool wrapunitspace=true, const fpreal stepweight=1.0)
 
GU_API void guProjectPointsOntoSurface (GA_Detail *gdp, const GA_Range &projectrange, const GU_RayIntersect *surfaceintersect, const GA_RWHandleV3 &normalattrib=GA_RWHandleV3(), const GA_ROHandleV3 &surfacenormalattrib=GA_ROHandleV3(), const GA_RWHandleT< int64 > &primnumattrib=GA_RWHandleT< int64 >(), const GA_RWHandleV3 &primuvwattrib=GA_RWHandleV3(), const GA_ROHandleF &radiusattrib=GA_ROHandleF(), fpreal radiusvalue=FLT_MAX, const bool scaleattrib=false)
 

Macro Definition Documentation

#define __GU_Relax_h__

Definition at line 15 of file GU_Relax.h.

Function Documentation

GU_API void guProjectPointsOntoSurface ( GA_Detail gdp,
const GA_Range projectrange,
const GU_RayIntersect surfaceintersect,
const GA_RWHandleV3 normalattrib = GA_RWHandleV3(),
const GA_ROHandleV3 surfacenormalattrib = GA_ROHandleV3(),
const GA_RWHandleT< int64 > &  primnumattrib = GA_RWHandleTint64 >(),
const GA_RWHandleV3 primuvwattrib = GA_RWHandleV3(),
const GA_ROHandleF radiusattrib = GA_ROHandleF(),
fpreal  radiusvalue = FLT_MAX,
const bool  scaleattrib = false 
)

Projects the points in projectrange of gdp onto the closest points of the surface specified by surfaceintersect. (Uses minimum distance, NOT projecting along normal.)

If normalattrib is valid, the normal on the surface at the new position will be written to it. If surfacenormalattrib is specified, it will be used to compute the surface normal, instead of using the surface primitive's evaluateNormalVector().

If primnumattrib or primuvwattrib are specified, the surface primitive index or uvw of each points will be stored.

If radiusattrib is specified, it will be used as an upper bound on the distance to the surface to speed up querying the GU_RayIntersect. Points more than this distance from the surface will not be moved. If radiusattrib is invalid, radiusvalue will be used for all points.

GU_API bool guRelaxPoints ( UT_Array< UT_Vector3 > &  newpositions,
const GA_Detail gdp,
const GA_Range relaxrange,
GEO_PointTreeGAOffset pttree,
const GA_ROHandleV3 normalattrib,
const UT_Vector3 normalvalue,
const GA_ROHandleF radiusattrib,
const fpreal  radiusvalue,
const GA_ROHandleF maxstepattrib = GA_ROHandleF(),
const fpreal  stepweight = 1.0,
const bool  scaleattrib = false 
)

Computes new positions of points into newpositions, (which is indexed by point offset, not index), such that the points would be more spread out in the 2D space tangent to the given normals. It returns true if at least one point would be moved, and false if no points would be moved.

NOTE: If you're relaxing points in volumes/tetrahedra/curves, you probably want to use guRelaxPoints3D or guRelaxPoints1D instead. This is more for surfaces.

pttree must contain exactly the points that can influence the points in relaxrange. It does not need to be all of the points in gdp, but the points must be in gdp. If radiusattrib is invalid, pttree shouldn't use radii.

If normalattrib is invalid, normalvalue is used to get the tangent plane for each point. If radiusattrib is invalid, radiusvalue is used to indicate the radius of each point either influencing or being relaxed.

stepweight indicates the portion of the distance toward the target position that the move represents. 1.0 moves directly to the target on this iteration. 0.5 moves halfway there for extra stability. 2.0 moves past the target, which may spread out points faster or may not converge at all.

NOTE: It is now the caller's responsibility to call buildIfNeeded() on the tree before calling this! The point tree is not modified by this function.

GU_API bool guRelaxPoints1D ( UT_Array< UT_Vector3 > &  newpositions,
const GA_Detail gdp,
const GA_Range relaxrange,
const GA_ROHandleF radiusattrib,
fpreal  radiusvalue,
const GA_RWHandleV3 uvwattrib,
const GEO_Face face,
const fpreal  stepweight = 1.0 
)

Computes new positions of points into newpositions, (which is indexed by point offset, not index), such that the points would be more spread out along the given curve. Distances are measured as arc-lengths between the u values of the points. uvwattrib is updated safely, (after all points have been moved, to avoid order-dependence). It returns true if at least one point would be moved, and false if no points would be moved.

NOTE: If you're relaxing points on a surface/volume/tetrahedra, you probably want to use guRelaxPoints or guRelaxPoints3D instead. This is only for curves. NOTE: u values must be in the range [0,1].

If radiusattrib is invalid, radiusvalue is used to indicate the radius (half-width) of each point either influencing or being relaxed.

stepweight indicates the portion of the distance toward the target position that the move represents. 1.0 moves directly to the target on this iteration. 0.5 moves halfway there for extra stability. 2.0 moves past the target, which may spread out points faster or may not converge at all.

GU_API bool guRelaxPoints2D ( UT_Array< UT_Vector2 > &  newpositions,
const UT_Array< UT_Vector2 > &  oldpositions,
UT_KDTree pttree,
const UT_Array< float > &  radii,
const fpreal  radiusvalue,
const bool  wrapunitspace = true,
const fpreal  stepweight = 1.0 
)

Computes new (2D) positions of points into newpositions, such that the points would be more spread out. It returns true if at least one point would be moved, and false if no points would be moved.

pttree must have dimension 2 and consist of exactly all points in oldpositions, in the same order as in pttree. If radii is empty, pttree shouldn't use radii.

If radii is empty, radiusvalue is used to indicate the radius of each point either influencing or being relaxed.

If unitspacewrap is true, space will be treated as wrapping to always stay within the unit square between 0 and 1 in both x and y, e.g. points near x=0 may be adjacent to points near x=1. However, input points themselves are then assumed to be between 0 and 1, and output points will be between 0 and 1.

stepweight indicates the portion of the distance toward the target position that the move represents. 1.0 moves directly to the target on this iteration. 0.5 moves halfway there for extra stability. 2.0 moves past the target, which may spread out points faster or may not converge at all.

NOTE: It is now the caller's responsibility to call buildIfNeeded() on the tree before calling this! GEO_2DTree handles this automatically in its constructor. The point tree is not modified by this function.

GU_API bool guRelaxPoints3D ( UT_Array< UT_Vector3 > &  newpositions,
const GA_Detail gdp,
const GA_Range relaxrange,
GEO_PointTreeGAOffset pttree,
const GA_ROHandleF radiusattrib,
const fpreal  radiusvalue,
const GA_ROHandleF maxstepattrib = GA_ROHandleF(),
const fpreal  stepweight = 1.0,
const bool  scaleattrib = false 
)

Computes new positions of points into newpositions, (which is indexed by point offset, not index), such that the points would be more spread out in 3D space. It returns true if at least one point would be moved, and false if no points would be moved.

NOTE: If you're relaxing points on a surface/curve, you probably want to use guRelaxPoints or guRelaxPoints1D instead. This is more for volumes/tetrahedra.

pttree must contain exactly the points that can influence the points in relaxrange. It does not need to be all of the points in gdp, but the points must be in gdp. If radiusattrib is invalid, pttree shouldn't use radii.

If radiusattrib is invalid, radiusvalue is used to indicate the radius of each point either influencing or being relaxed.

stepweight indicates the portion of the distance toward the target position that the move represents. 1.0 moves directly to the target on this iteration. 0.5 moves halfway there for extra stability. 2.0 moves past the target, which may spread out points faster or may not converge at all.

NOTE: It is now the caller's responsibility to call buildIfNeeded() on the tree before calling this! The point tree is not modified by this function.