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-- File: IGESConvGeom_GeomBuilder.cdl
-- Created: Wed Nov 16 14:16:50 1994
-- Author: Christian CAILLET
-- <cky@stylox>
---Copyright: Matra Datavision 1994
class GeomBuilder from IGESConvGeom
---Purpose : This class provides some useful basic tools to build IGESGeom
-- curves, especially :
-- define a curve in a plane in 3D space (ex. Circular or Conic
-- arc, or Copious Data defined in 2D)
-- make a CopiousData from a list of points/vectors
uses XY from gp, XYZ from gp, Trsf, Ax1, Ax2, Ax3,
HSequenceOfXYZ, HArray1OfXY, HArray1OfXYZ,
TransformationMatrix, CopiousData
raises DomainError
is
Create returns GeomBuilder;
---Purpose : Creates a GeomBuilder at initial state.
Clear (me : in out) is static;
---Purpose : Clears list of Points/Vectors and data about Transformation
AddXY (me : in out; val : XY from gp) is static;
---Purpose : Adds a XY (Z=0) to the list of points
AddXYZ (me : in out; val : XYZ from gp) is static;
---Purpose : Adds a XYZ to the list of points
AddVec (me : in out; val : XYZ from gp) is static;
---Purpose : Adds a Vector part to the list of points. It will be used
-- for CopiousData, datatype=3, only.
-- AddXY and AddXYZ consider a null vector part (0,0,0)
-- AddVec adds to the last added XY or XYZ
NbPoints (me) returns Integer is static;
---Purpose : Returns the count of already recorded points
Point (me; num : Integer) returns XYZ is static;
---Purpose : Returns a point given its rank (if added as XY, Z will be 0)
MakeCopiousData (me; datatype : Integer; polyline : Boolean = Standard_False)
returns mutable CopiousData
---Purpose : Makes a CopiousData with the list of recorded Points/Vectors
-- according to <datatype>, which must be 1,2 or 3
-- If <polyline> is given True, the CopiousData is coded as a
-- Polyline, but <datatype> must not be 3
-- <datatype> = 1 : Common Z is computed as average of all Z
-- <datatype> = 1 or 2 : Vectors are ignored
raises DomainError;
-- Error if : <datatype> is not 1,2 or 3; or NbPoints is 0
MakeXY (me) returns mutable HArray1OfXY is static;
---Purpose : Returns the list of points as a HArray1OfXY. Z are ignored.
MakeXYZ (me) returns mutable HArray1OfXYZ is static;
---Purpose : Returns the list of points as a HArray1OfXYZ
Position (me) returns Trsf from gp is static;
---Purpose : Returns the Position in which the method EvalXYZ will
-- evaluate a XYZ. It can be regarded as defining a local system.
-- It is initially set to Identity
SetPosition (me : in out; pos : Trsf from gp) is static;
---Purpose : Sets final position from an already defined Trsf
SetPosition (me : in out; pos : Ax3 from gp) is static;
---Purpose : Sets final position from an Ax3
SetPosition (me : in out; pos : Ax2 from gp) is static;
---Purpose : Sets final position from an Ax2
SetPosition (me : in out; pos : Ax1 from gp) is static;
---Purpose : Sets final position from an Ax1
-- (this means that origin point and Z-axis are defined, the
-- other axes are defined arbitrarily)
IsIdentity (me) returns Boolean is static;
---Purpose : Returns True if the Position is Identity
IsTranslation (me) returns Boolean is static;
---Purpose : Returns True if the Position is a Translation only
-- Remark : Identity and ZOnly will answer True
IsZOnly (me) returns Boolean is static;
---Purpose : Returns True if the Position corresponds to a Z-Displacement,
-- i.e. is a Translation only, and only on Z
-- Remark : Identity will answer True
EvalXYZ (me; val : XYZ from gp; X,Y,Z : out Real) is static;
---Purpose : Evaluates a XYZ value in the Position already defined.
-- Returns the transformed coordinates.
-- For a 2D definition, X,Y will then be used to define a XY and
-- Z will be regarded as a Z Displacement (can be ignored)
MakeTransformation (me; unit : Real = 1)
returns mutable TransformationMatrix is static;
---Purpose : Returns the IGES Transformation which corresponds to the
-- Position. Even if it is an Identity : IsIdentity should be
-- tested first.
-- <unit> is the unit value in which the model is created :
-- it is used to convert translation part
fields
theXYZ : HSequenceOfXYZ;
theVec : HSequenceOfXYZ;
thepos : Trsf from gp;
end GeomBuilder;
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