1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
|
--
-- File : Plane.cdl
-- Created : Sat 9 Jan 1993
-- Author : CKY / Contract Toubro-Larsen ( Kiran )
--
---Copyright : MATRA-DATAVISION 1993
--
class Plane from IGESGeom inherits IGESEntity
---Purpose: defines IGESPlane, Type <108> Form <-1,0,1>
-- in package IGESGeom
-- A plane entity can be used to represent unbounded plane,
-- as well as bounded portion of a plane. In either of the
-- above cases the plane is defined within definition space
-- by means of coefficients A, B, C, D where at least one of
-- A, B, C is non-zero and A * XT + B * YT + C * ZT = D
uses
Pnt from gp,
XYZ from gp
is
Create returns mutable Plane;
-- Specific Methods pertaining to the class
Init(me : mutable;
A, B, C, D : Real;
aCurve : IGESEntity;
attach : XYZ;
aSize : Real);
-- This method is used to set the fields of the
-- class Plane
-- - A, B, C, D : Coefficients in the planar equation
-- - aCurve : Bounding curve of the plane, if any
-- - attach : Location of the display symbol if one exists,
-- else (0, 0, 0)
-- - aSize : Size of the display symbol if one exists else 0
SetFormNumber (me : mutable; form : Integer);
---Purpose : Changes FormNumber (indicates the Type of Bound :
-- 0 no Bound, 1 (External) Bound, -1 Hole)
-- Remark that Init keeps this Value and must be consistent :
-- aCurve Null if FormNumber = 0, Non-Null else
-- Error if not in ranges [0-1] or [10-12]
Equation(me; A, B, C, D : out Real);
-- returns the basic equation describing the plane
-- A, B, C, D are the coefficients of plane.
TransformedEquation(me; A, B, C, D : out Real);
-- returns basic equation describing plane after applying Location()
HasBoundingCurve(me) returns Boolean;
---Purpose : returns True if there exists a bounding curve
HasBoundingCurveHole(me) returns Boolean;
---Purpose : returns True if bounding curve exists and bounded portion is negative
BoundingCurve(me) returns IGESEntity;
---Purpose : returns Optional Bounding Curve, can be positive (normal clipping)
-- or negative (hole) according to Form Number
HasSymbolAttach(me) returns Boolean;
---Purpose : returns True if SymbolSize() > 0, False if SymbolSize() = 0
SymbolAttach(me) returns Pnt;
---Purpose : returns (X, Y, Z) if symbol exists else returns (0, 0, 0)
TransformedSymbolAttach(me) returns Pnt;
---Purpose : returns (X, Y, Z) if symbol exists after applying Transf. Matrix
-- else returns (0, 0, 0)
SymbolSize(me) returns Real;
---Purpose : Size of optional display symbol
fields
--
-- Class : IGESGeom_Plane
--
-- Purpose : Declaration of variables specific to the definition
-- of the Class Plane.
--
-- Reminder : A Plane instance is defined by :
-- The plane cooefficients, the bounding curve if any,
-- the size of an optional display symbol.
theA : Real;
theB : Real;
theC : Real;
theD : Real;
theCurve : IGESEntity;
theAttach : XYZ; -- The display symbol
theSize : Real;
end Plane;
|
