OCC.Core.CSLib module¶
CSLib module, see official documentation at https://www.opencascade.com/doc/occt-7.4.0/refman/html/package_cslib.html
-
class
CSLib_Class2d(*args)¶ Bases:
object- Constructs the 2D-polygon. thePnts2d is the set of the vertices (closed polygon will always be created inside of this constructor; consequently, there is no point in repeating first and last point in thePnts2d). theTolu and theTolv are tolerances. theUmin, theVmin, theUmax, theVmax are UV-bounds of the polygon.
- param thePnts2d
- type thePnts2d
TColgp_Array1OfPnt2d
- param theTolU
- type theTolU
float
- param theTolV
- type theTolV
float
- param theUMin
- type theUMin
float
- param theVMin
- type theVMin
float
- param theUMax
- type theUMax
float
- param theVMax
- type theVMax
float
- rtype
None* Constructs the 2D-polygon. thePnts2d is the set of the vertices (closed polygon will always be created inside of this constructor; consequently, there is no point in repeating first and last point in thePnts2d). theTolu and theTolv are tolerances. theUmin, theVmin, theUmax, theVmax are UV-bounds of the polygon.
- param thePnts2d
- type thePnts2d
TColgp_SequenceOfPnt2d
- param theTolU
- type theTolU
float
- param theTolV
- type theTolV
float
- param theUMin
- type theUMin
float
- param theVMin
- type theVMin
float
- param theUMax
- type theUMax
float
- param theVMax
- type theVMax
float
- rtype
None
-
InternalSiDans()¶ - Parameters
X –
- type X
float
- param Y
- type Y
float
- rtype
int
-
InternalSiDansOuOn()¶ - Parameters
X –
- type X
float
- param Y
- type Y
float
- rtype
int
-
SiDans()¶ - Parameters
P –
- type P
gp_Pnt2d
- rtype
int
-
SiDans_OnMode()¶ - Parameters
P –
- type P
gp_Pnt2d
- param Tol
- type Tol
float
- rtype
int
-
property
thisown¶ The membership flag
-
class
CSLib_NormalPolyDef(*args)¶ Bases:
OCC.Core.math.math_FunctionWithDerivative- Parameters
k0 –
- type k0
int
- param li
- type li
TColStd_Array1OfReal
- rtype
None
-
property
thisown¶ The membership flag
-
class
SwigPyIterator(*args, **kwargs)¶ Bases:
object-
advance()¶
-
copy()¶
-
decr()¶
-
distance()¶
-
equal()¶
-
incr()¶
-
next()¶
-
previous()¶
-
property
thisown¶ The membership flag
-
value()¶
-
-
class
cslib¶ Bases:
object-
static
DNNUV()¶ - – Computes the derivative of order Nu in the – direction U and Nv in the direction V of the not – normalized normal vector at the point P(U,V) The array DerSurf contain the derivative (i,j) of the surface for i=0,Nu+1 ; j=0,Nv+1
- param Nu
- type Nu
int
- param Nv
- type Nv
int
- param DerSurf
- type DerSurf
TColgp_Array2OfVec
- rtype
gp_Vec* Computes the derivatives of order Nu in the direction Nu and Nv in the direction Nv of the not normalized vector N(u,v) = dS1/du * dS2/dv (cases where we use an osculating surface) DerSurf1 are the derivatives of S1
- param Nu
- type Nu
int
- param Nv
- type Nv
int
- param DerSurf1
- type DerSurf1
TColgp_Array2OfVec
- param DerSurf2
- type DerSurf2
TColgp_Array2OfVec
- rtype
gp_Vec
-
static
DNNormal()¶ - – Computes the derivative of order Nu in the – direction U and Nv in the direction V of the normalized normal vector at the point P(U,V) array DerNUV contain the derivative (i+Iduref,j+Idvref) of D1U ^ D1V for i=0,Nu ; j=0,Nv Iduref and Idvref correspond to a derivative of D1U ^ D1V which can be used to compute the normalized normal vector. In the regular cases , Iduref=Idvref=0.
- param Nu
- type Nu
int
- param Nv
- type Nv
int
- param DerNUV
- type DerNUV
TColgp_Array2OfVec
- param Iduref
default value is 0
- type Iduref
int
- param Idvref
default value is 0
- type Idvref
int
- rtype
gp_Vec
-
static
Normal()¶ - The following functions computes the normal to a surface inherits FunctionWithDerivative from math //! Computes the normal direction of a surface as the cross product between D1U and D1V. If D1U has null length or D1V has null length or D1U and D1V are parallel the normal is undefined. To check that D1U and D1V are colinear the sinus of the angle between D1U and D1V is computed and compared with SinTol. The normal is computed if theStatus == Done else the theStatus gives the reason why the computation has failed.
- param D1U
- type D1U
gp_Vec
- param D1V
- type D1V
gp_Vec
- param SinTol
- type SinTol
float
- param theStatus
- type theStatus
CSLib_DerivativeStatus
- param Normal
- type Normal
gp_Dir
- rtype
void* If there is a singularity on the surface the previous method cannot compute the local normal. This method computes an approched normal direction of a surface. It does a limited development and needs the second derivatives on the surface as input data. It computes the normal as follow : N(u, v) = D1U ^ D1V N(u0+du,v0+dv) = N0 + DN/du(u0,v0) * du + DN/dv(u0,v0) * dv + Eps with Eps->0 so we can have the equivalence N ~ dN/du + dN/dv. DNu = ||DN/du|| and DNv = ||DN/dv|| //! . if DNu IsNull (DNu <= Resolution from gp) the answer Done = True the normal direction is given by DN/dv . if DNv IsNull (DNv <= Resolution from gp) the answer Done = True the normal direction is given by DN/du . if the two directions DN/du and DN/dv are parallel Done = True the normal direction is given either by DN/du or DN/dv. To check that the two directions are colinear the sinus of the angle between these directions is computed and compared with SinTol. . if DNu/DNv or DNv/DNu is lower or equal than Real Epsilon Done = False, the normal is undefined . if DNu IsNull and DNv is Null Done = False, there is an indetermination and we should do a limited developpement at order 2 (it means that we cannot omit Eps). . if DNu Is not Null and DNv Is not Null Done = False, there are an infinity of normals at the considered point on the surface.
- param D1U
- type D1U
gp_Vec
- param D1V
- type D1V
gp_Vec
- param D2U
- type D2U
gp_Vec
- param D2V
- type D2V
gp_Vec
- param D2UV
- type D2UV
gp_Vec
- param SinTol
- type SinTol
float
- param Done
- type Done
bool
- param theStatus
- type theStatus
CSLib_NormalStatus
- param Normal
- type Normal
gp_Dir
- rtype
void* Computes the normal direction of a surface as the cross product between D1U and D1V.
- param D1U
- type D1U
gp_Vec
- param D1V
- type D1V
gp_Vec
- param MagTol
- type MagTol
float
- param theStatus
- type theStatus
CSLib_NormalStatus
- param Normal
- type Normal
gp_Dir
- rtype
void* find the first order k0 of deriviative of NUV where: foreach order < k0 all the derivatives of NUV are null all the derivatives of NUV corresponding to the order k0 are collinear and have the same sens. In this case, normal at U,V is unique.
- param MaxOrder
- type MaxOrder
int
- param DerNUV
- type DerNUV
TColgp_Array2OfVec
- param MagTol
- type MagTol
float
- param U
- type U
float
- param V
- type V
float
- param Umin
- type Umin
float
- param Umax
- type Umax
float
- param Vmin
- type Vmin
float
- param Vmax
- type Vmax
float
- param theStatus
- type theStatus
CSLib_NormalStatus
- param Normal
- type Normal
gp_Dir
- param OrderU
- type OrderU
int
- param OrderV
- type OrderV
int
- rtype
void
-
property
thisown¶ The membership flag
-
static