LProp — OpenCascade.js

OCCT package LProp: LProp_BadContinuity, LProp_CIType, LProp_CLProps3d, LProp_CurAndInf, and 4 more bound classes.

LProp_BadContinuity

Standard_Failureexception

Constructors(2)

constructor(theMessage: string): LProp_BadContinuity
Parameters (1)
- theMessage
constructor(theMessage: string, theStackTrace: string): LProp_BadContinuity
Parameters (2)
- theMessage
- theStackTrace

Instance methods(1)

ExceptionType(): string

LProp_CIType

Properties(3)

LProp_Inflection:'LProp_Inflection'readonly
LProp_MinCur:'LProp_MinCur'readonly
LProp_MaxCur:'LProp_MaxCur'readonly

Implementation class for computing local properties of a curve: point, derivatives up to order 3, tangent, curvature, normal, and centre of curvature. Parameterized by geometric types (Pnt/Vec/Dir) and curve type.

Constructors(3)

constructor(N: number, Resolution: number): LProp_CLProps3d
Same as previous constructor but here the parameter is set to the value and the curve is set with SetCurve. the curve can have a empty constructor All the computations done will be related to and when the functions "set" will be done.
Parameters (2)
- N
- Resolution
constructor(C: Adaptor3d_Curve, N: number, Resolution: number): LProp_CLProps3d
Initializes the local properties of the curve The current point and the derivatives are computed at the same time, which allows an optimization of the computation time. <N> indicates the maximum number of derivations to be done (0, 1, 2 or 3). For example, to compute only the tangent, N should be equal to 1. <Resolution> is the linear tolerance (it is used to test if a vector is null).
Parameters (3)
- C
- N
- Resolution
constructor(C: Adaptor3d_Curve, U: number, N: number, Resolution: number): LProp_CLProps3d
Same as previous constructor but here the parameter is set to the value . All the computations done will be related to and .
Parameters (4)
- C
- U
- N
- Resolution

Instance methods(11)

SetParameter(U: number): void
Initializes the local properties of the curve for the parameter value .
Parameters (1)
- U
SetCurve(C: Adaptor3d_Curve): void
Initializes the local properties of the curve for the new curve.
Parameters (1)
- C
Value(): gp_Pnt
Returns the Point.
D1(): gp_Vec
Returns the first derivative. The derivative is computed if it has not been yet.
D2(): gp_Vec
Returns the second derivative. The derivative is computed if it has not been yet.
D3(): gp_Vec
Returns the third derivative. The derivative is computed if it has not been yet.
IsTangentDefined(): boolean
Returns True if the tangent is defined. For example, the tangent is not defined if the three first derivatives are all null.
Tangent(D: gp_Dir): void
output the tangent direction <D>.
Parameters (1)
- D
Curvature(): number
Returns the curvature.
Normal(N: gp_Dir): void
Returns the normal direction <N>.
Parameters (1)
- N
CentreOfCurvature(P: gp_Pnt): void
Returns the centre of curvature.
.
Parameters (1)
- P

LProp_CurAndInf

Stores the parameters of a curve 2d or 3d corresponding to the curvature's extremas and the Inflection's Points.

Constructors(1)

constructor(): LProp_CurAndInf

Instance methods(7)

AddInflection(Param: number): void
Parameters (1)
- Param
AddExtCur(Param: number, IsMin: boolean): void
Parameters (2)
- Param
- IsMin
Clear(): void
IsEmpty(): boolean
NbPoints(): number
Returns the number of points. The Points are stored to increasing parameter.
Parameter(N: number): number
Returns the parameter of the Nth point. raises if N not in the range [1,NbPoints()].
Parameters (1)
- N
Type(N: number): LProp_CIType
Returns.
- MinCur if the Nth parameter corresponds to a minimum of the radius of curvature.
- MaxCur if the Nth parameter corresponds to a maximum of the radius of curvature.
- Inflection if the parameter corresponds to a point of inflection. raises if N not in the range [1,NbPoints()]
Parameters (1)
- N

LProp_CurveUtils_DirectAccess

Constructors(1)

constructor(): LProp_CurveUtils_DirectAccess

LProp_NotDefined

Standard_Failureexception

Constructors(2)

constructor(theMessage: string): LProp_NotDefined
Parameters (1)
- theMessage
constructor(theMessage: string, theStackTrace: string): LProp_NotDefined
Parameters (2)
- theMessage
- theStackTrace

Instance methods(1)

ExceptionType(): string

LProp_SLProps3d

Template class for computing local properties of a 3D surface: point, first and second derivatives, tangent directions, normal, and curvature analysis (max, min, mean, Gaussian).

Constructors(3)

constructor(N: number, Resolution: number): LProp_SLProps3d
idem as previous constructor but without setting the value of parameters and <V> and the surface. the surface can have an empty constructor.
Parameters (2)
- N
- Resolution
constructor(S: Adaptor3d_Surface, N: number, Resolution: number): LProp_SLProps3d
idem as previous constructor but without setting the value of parameters and <V>.
Parameters (3)
- S
- N
- Resolution
constructor(S: Adaptor3d_Surface, U: number, V: number, N: number, Resolution: number): LProp_SLProps3d
Initializes the local properties of the surface for the parameter values (, <V>). The current point and the derivatives are computed at the same time, which allows an optimization of the computation time. <N> indicates the maximum number of derivations to be done (0, 1, or 2). For example, to compute only the tangent, N should be equal to 1. <Resolution> is the linear tolerance (it is used to test if a vector is null).
Parameters (5)
- S
- U
- V
- N
- Resolution

Instance methods(21)

SetSurface(S: Adaptor3d_Surface): void
Initializes the local properties of the surface S for the new surface.
Parameters (1)
- S
SetParameters(U: number, V: number): void
Initializes the local properties of the surface S for the new parameter values (, <V>).
Parameters (2)
- U
- V
Value(): gp_Pnt
Returns the point.
D1U(): gp_Vec
Returns the first U derivative. The derivative is computed if it has not been yet.
D1V(): gp_Vec
Returns the first V derivative. The derivative is computed if it has not been yet.
D2U(): gp_Vec
Returns the second U derivatives The derivative is computed if it has not been yet.
D2V(): gp_Vec
Returns the second V derivative. The derivative is computed if it has not been yet.
DUV(): gp_Vec
Returns the second UV cross-derivative. The derivative is computed if it has not been yet.
IsTangentUDefined(): boolean
returns True if the U tangent is defined. For example, the tangent is not defined if the two first U derivatives are null.
TangentU(D: gp_Dir): void
Returns the tangent direction <D> on the iso-V.
Parameters (1)
- D —
  Mutated in place; read the updated value from this argument after the call.
IsTangentVDefined(): boolean
returns if the V tangent is defined. For example, the tangent is not defined if the two first V derivatives are null.
TangentV(D: gp_Dir): void
Returns the tangent direction <D> on the iso-V.
Parameters (1)
- D —
  Mutated in place; read the updated value from this argument after the call.
IsNormalDefined(): boolean
Tells if the normal is defined.
Normal(): gp_Dir
Returns the normal direction.
IsCurvatureDefined(): boolean
returns True if the curvature is defined.
IsUmbilic(): boolean
returns True if the point is umbilic (i.e. if the curvature is constant).
MaxCurvature(): number
Returns the maximum curvature.
MinCurvature(): number
Returns the minimum curvature.
CurvatureDirections(MaxD: gp_Dir, MinD: gp_Dir): void
Returns the direction of the maximum and minimum curvature <MaxD> and <MinD>.
Parameters (2)
- MaxD —
  Mutated in place; read the updated value from this argument after the call.
- MinD —
  Mutated in place; read the updated value from this argument after the call.
MeanCurvature(): number
Returns the mean curvature.
GaussianCurvature(): number
Returns the Gaussian curvature.

LProp_Status

Properties(4)

LProp_Undecided:'LProp_Undecided'readonly
LProp_Undefined:'LProp_Undefined'readonly
LProp_Defined:'LProp_Defined'readonly
LProp_Computed:'LProp_Computed'readonly