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extern/opennurbs/opennurbs_surfaceproxy.h

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/* $NoKeywords: $ */
/*
//
// Copyright (c) 1993-2012 Robert McNeel & Associates. All rights reserved.
// OpenNURBS, Rhinoceros, and Rhino3D are registered trademarks of Robert
// McNeel & Associates.
//
// THIS SOFTWARE IS PROVIDED "AS IS" WITHOUT EXPRESS OR IMPLIED WARRANTY.
// ALL IMPLIED WARRANTIES OF FITNESS FOR ANY PARTICULAR PURPOSE AND OF
// MERCHANTABILITY ARE HEREBY DISCLAIMED.
//
// For complete openNURBS copyright information see <http://www.opennurbs.org>.
//
////////////////////////////////////////////////////////////////
*/
////////////////////////////////////////////////////////////////
//
// Definition of surface proxy object
//
////////////////////////////////////////////////////////////////
#if !defined(OPENNURBS_SURFACEPROXY_INC_)
#define OPENNURBS_SURFACEPROXY_INC_
class ON_CLASS ON_SurfaceProxy : public ON_Surface
{
public:
// virtual ON_Object::DestroyRuntimeCache override
void DestroyRuntimeCache( bool bDelete = true ) override;
public:
ON_SurfaceProxy();
ON_SurfaceProxy(const ON_Surface*);
ON_SurfaceProxy(const ON_SurfaceProxy&);
ON_SurfaceProxy& operator=(const ON_SurfaceProxy&);
virtual ~ON_SurfaceProxy();
void SetProxySurface( const ON_Surface* proxy_surface );
const ON_Surface* ProxySurface() const;
bool ProxySurfaceIsTransposed() const;
private:
const ON_Surface* m_surface;
bool m_bTransposed; // proxy surface parameterization is transpose of m_surface
public:
/*
Description:
Get a duplicate of the surface.
Returns:
A duplicate of the surface.
Remarks:
The caller must delete the returned surface.
For non-ON_SurfaceProxy objects, this simply duplicates the surface using
ON_Object::Duplicate.
For ON_SurfaceProxy objects, this duplicates the actual proxy surface
geometry and, if necessary, transposes the result to that
the returned surfaces's parameterization and locus match the proxy surface's.
*/
ON_Surface* DuplicateSurface() const override;
/////////////////////////////////////////////////////////////////
// ON_Object overrides
// virtual ON_Object::SizeOf override
unsigned int SizeOf() const override;
// virtual ON_Object::DataCRC override
ON__UINT32 DataCRC(ON__UINT32 current_remainder) const override;
bool IsValid( class ON_TextLog* text_log = nullptr ) const override;
void Dump( ON_TextLog& ) const override; // for debugging
bool Write(
ON_BinaryArchive& // open binary file
) const override;
bool Read(
ON_BinaryArchive& // open binary file
) override;
/////////////////////////////////////////////////////////////////
// ON_Geometry overrides
int Dimension() const override;
// virtual ON_Geometry GetBBox override
bool GetBBox( double* boxmin, double* boxmax, bool bGrowBox = false ) const override;
bool Transform(
const ON_Xform&
) override;
/////////////////////////////////////////////////////////////////
// ON_Surface overrides
ON_Interval Domain(
int // 0 gets first parameter's domain, 1 gets second parameter's domain
) const override;
/*
Description:
Get an estimate of the size of the rectangle that would
be created if the 3d surface where flattened into a rectangle.
Parameters:
width - [out] (corresponds to the first surface parameter)
height - [out] (corresponds to the first surface parameter)
Remarks:
overrides virtual ON_Surface::GetSurfaceSize
Returns:
true if successful.
*/
bool GetSurfaceSize(
double* width,
double* height
) const override;
int SpanCount(
int // 0 gets first parameter's domain, 1 gets second parameter's domain
) const override; // number of smooth spans in curve
bool GetSpanVector( // span "knots"
int, // 0 gets first parameter's domain, 1 gets second parameter's domain
double* // array of length SpanCount() + 1
) const override; //
int Degree( // returns maximum algebraic degree of any span
// ( or a good estimate if curve spans are not algebraic )
int // 0 gets first parameter's domain, 1 gets second parameter's domain
) const override;
bool GetParameterTolerance( // returns tminus < tplus: parameters tminus <= s <= tplus
int, // 0 gets first parameter, 1 gets second parameter
double, // t = parameter in domain
double*, // tminus
double* // tplus
) const override;
// override virtual ON_Surface::IsIsoparametric
ON_Surface::ISO IsIsoparametric(
const ON_Curve& curve,
const ON_Interval* curve_domain = nullptr
) const override;
// override virtual ON_Surface::IsIsoparametric
ON_Surface::ISO IsIsoparametric(
const ON_BoundingBox& bbox
) const override;
/*
Description:
Test a surface to see if it is planar.
Parameters:
plane - [out] if not nullptr and true is returned,
the plane parameters are filled in.
tolerance - [in] tolerance to use when checking
Returns:
true if there is a plane such that the maximum distance from
the surface to the plane is <= tolerance.
Remarks:
Overrides virtual ON_Surface::IsPlanar.
*/
bool IsPlanar(
ON_Plane* plane = nullptr,
double tolerance = ON_ZERO_TOLERANCE
) const override;
bool IsClosed( // true if surface is closed in direction
int // dir 0 = "s", 1 = "t"
) const override;
bool IsPeriodic( // true if surface is periodic in direction
int // dir 0 = "s", 1 = "t"
) const override;
bool IsSingular( // true if surface side is collapsed to a point
int // side of parameter space to test
// 0 = south, 1 = east, 2 = north, 3 = west
) const override;
/*
Description:
Search for a derivatitive, tangent, or curvature
discontinuity.
Parameters:
dir - [in] If 0, then "u" parameter is checked. If 1, then
the "v" parameter is checked.
c - [in] type of continity to test for.
t0 - [in] Search begins at t0. If there is a discontinuity
at t0, it will be ignored. This makes it
possible to repeatedly call GetNextDiscontinuity
and step through the discontinuities.
t1 - [in] (t0 != t1) If there is a discontinuity at t1 is
will be ingored unless c is a locus discontinuity
type and t1 is at the start or end of the curve.
t - [out] if a discontinuity is found, then *t reports the
parameter at the discontinuity.
hint - [in/out] if GetNextDiscontinuity will be called
repeatedly, passing a "hint" with initial value *hint=0
will increase the speed of the search.
dtype - [out] if not nullptr, *dtype reports the kind of
discontinuity found at *t. A value of 1 means the first
derivative or unit tangent was discontinuous. A value
of 2 means the second derivative or curvature was
discontinuous. A value of 0 means teh curve is not
closed, a locus discontinuity test was applied, and
t1 is at the start of end of the curve.
cos_angle_tolerance - [in] default = cos(1 degree) Used only
when c is ON::continuity::G1_continuous or ON::continuity::G2_continuous. If the
cosine of the angle between two tangent vectors is
<= cos_angle_tolerance, then a G1 discontinuity is reported.
curvature_tolerance - [in] (default = ON_SQRT_EPSILON) Used
only when c is ON::continuity::G2_continuous. If K0 and K1 are
curvatures evaluated from above and below and
|K0 - K1| > curvature_tolerance, then a curvature
discontinuity is reported.
Returns:
Parametric continuity tests c = (C0_continuous, ..., G2_continuous):
true if a parametric discontinuity was found strictly
between t0 and t1. Note well that all curves are
parametrically continuous at the ends of their domains.
Locus continuity tests c = (C0_locus_continuous, ...,G2_locus_continuous):
true if a locus discontinuity was found strictly between
t0 and t1 or at t1 is the at the end of a curve.
Note well that all open curves (IsClosed()=false) are locus
discontinuous at the ends of their domains. All closed
curves (IsClosed()=true) are at least C0_locus_continuous at
the ends of their domains.
*/
bool GetNextDiscontinuity(
int dir,
ON::continuity c,
double t0,
double t1,
double* t,
int* hint=nullptr,
int* dtype=nullptr,
double cos_angle_tolerance=ON_DEFAULT_ANGLE_TOLERANCE_COSINE,
double curvature_tolerance=ON_SQRT_EPSILON
) const override;
/*
Description:
Test continuity at a surface parameter value.
Parameters:
c - [in] continuity to test for
s - [in] surface parameter to test
t - [in] surface parameter to test
hint - [in] evaluation hint
point_tolerance - [in] if the distance between two points is
greater than point_tolerance, then the surface is not C0.
d1_tolerance - [in] if the difference between two first derivatives is
greater than d1_tolerance, then the surface is not C1.
d2_tolerance - [in] if the difference between two second derivatives is
greater than d2_tolerance, then the surface is not C2.
cos_angle_tolerance - [in] default = cos(1 degree) Used only when
c is ON::continuity::G1_continuous or ON::continuity::G2_continuous. If the cosine
of the angle between two normal vectors
is <= cos_angle_tolerance, then a G1 discontinuity is reported.
curvature_tolerance - [in] (default = ON_SQRT_EPSILON) Used only when
c is ON::continuity::G2_continuous. If K0 and K1 are curvatures evaluated
from above and below and |K0 - K1| > curvature_tolerance,
then a curvature discontinuity is reported.
Returns:
true if the surface has at least the c type continuity at the parameter t.
Remarks:
Overrides virtual ON_Surface::IsContinuous
*/
bool IsContinuous(
ON::continuity c,
double s,
double t,
int* hint = nullptr,
double point_tolerance=ON_ZERO_TOLERANCE,
double d1_tolerance=ON_ZERO_TOLERANCE,
double d2_tolerance=ON_ZERO_TOLERANCE,
double cos_angle_tolerance=ON_DEFAULT_ANGLE_TOLERANCE_COSINE,
double curvature_tolerance=ON_SQRT_EPSILON
) const override;
bool Reverse( // reverse parameterizatrion, Domain changes from [a,b] to [-b,-a]
int // dir 0 = "s", 1 = "t"
) override;
bool Transpose() override; // transpose surface parameterization (swap "s" and "t")
// work horse evaluator
bool Evaluate( // returns false if unable to evaluate
double, double, // evaluation parameters
int, // number of derivatives (>=0)
int, // array stride (>=Dimension())
double*, // array of length stride*(ndir+1)*(ndir+2)/2
int = 0, // optional - determines which quadrant to evaluate from
// 0 = default
// 1 from NE quadrant
// 2 from NW quadrant
// 3 from SW quadrant
// 4 from SE quadrant
int* = 0 // optional - evaluation hint (int[2]) used to speed
// repeated evaluations
) const override;
ON_Curve* IsoCurve(
int dir,
double c
) const override;
int GetNurbForm( // returns 0: unable to create NURBS representation
// with desired accuracy.
// 1: success - returned NURBS parameterization
// matches the surface's to wthe desired accuracy
// 2: success - returned NURBS point locus matches
// the surfaces's to the desired accuracy but, on
// the interior of the surface's domain, the
// surface's parameterization and the NURBS
// parameterization may not match to the
// desired accuracy.
ON_NurbsSurface&,
double = 0.0
) const override;
int HasNurbForm( // returns 0: unable to create NURBS representation
// with desired accuracy.
// 1: success - returned NURBS parameterization
// matches the surface's to wthe desired accuracy
// 2: success - returned NURBS point locus matches
// the surfaces's to the desired accuracy but, on
// the interior of the surface's domain, the
// surface's parameterization and the NURBS
// parameterization may not match to the
// desired accuracy.
) const override;
bool GetSurfaceParameterFromNurbFormParameter(
double nurbs_s, double nurbs_t,
double* surface_s, double* surface_t
) const override;
bool GetNurbFormParameterFromSurfaceParameter(
double surface_s, double surface_t,
double* nurbs_s, double* nurbs_t
) const override;
private:
ON_OBJECT_DECLARE(ON_SurfaceProxy);
};
#endif