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b311480e | 1 | -- Created on: 1996-12-30 |

2 | -- Created by: Stagiaire Mary FABIEN | |

3 | -- Copyright (c) 1996-1999 Matra Datavision | |

973c2be1 | 4 | -- Copyright (c) 1999-2014 OPEN CASCADE SAS |

b311480e | 5 | -- |

973c2be1 | 6 | -- This file is part of Open CASCADE Technology software library. |

b311480e | 7 | -- |

d5f74e42 | 8 | -- This library is free software; you can redistribute it and/or modify it under |

9 | -- the terms of the GNU Lesser General Public License version 2.1 as published | |

973c2be1 | 10 | -- by the Free Software Foundation, with special exception defined in the file |

11 | -- OCCT_LGPL_EXCEPTION.txt. Consult the file LICENSE_LGPL_21.txt included in OCCT | |

12 | -- distribution for complete text of the license and disclaimer of any warranty. | |

b311480e | 13 | -- |

973c2be1 | 14 | -- Alternatively, this file may be used under the terms of Open CASCADE |

15 | -- commercial license or contractual agreement. | |

7fd59977 | 16 | |

17 | class GTransform from BRepBuilderAPI inherits ModifyShape from BRepBuilderAPI | |

18 | ||

19 | ---Purpose: Geometric transformation on a shape. | |

20 | -- The transformation to be applied is defined as a gp_GTrsf | |

21 | -- transformation. It may be: | |

22 | -- - a transformation equivalent to a gp_Trsf transformation, the | |

23 | -- most common case: you should , however, use a BRepAPI_Transform | |

24 | -- object to perform this kind of transformation; or | |

25 | -- - an affinity, or | |

26 | -- - more generally, any type of point transformation which may | |

27 | -- be defined by a three row, four column matrix of transformation. | |

28 | -- In the last two cases, the underlying geometry of the | |

29 | -- following shapes may change: | |

30 | -- - a curve which supports an edge of the shape, or | |

31 | -- - a surface which supports a face of the shape; | |

32 | -- For example, a circle may be transformed into an ellipse when | |

33 | -- applying an affinity transformation. | |

34 | -- The transformation is applied to: | |

35 | -- - all the curves which support edges of the shape, and | |

36 | -- - all the surfaces which support faces of the shape. | |

37 | -- A GTransform object provides a framework for: | |

38 | -- - defining the geometric transformation to be applied, | |

39 | -- - implementing the transformation algorithm, and | |

40 | -- - consulting the result. | |

41 | ||

42 | ||

43 | ||

44 | uses | |

45 | Trsf from gp, | |

46 | GTrsf from gp, | |

47 | Shape from TopoDS, | |

48 | Face from TopoDS, | |

49 | Collect from BRepBuilderAPI, | |

50 | ShapeModification from BRepBuilderAPI, | |

51 | ListOfShape from TopTools | |

52 | ||

53 | -- Modified by Sergey KHROMOV - Thu Mar 27 17:45:42 2003 Begin | |

54 | raises | |

55 | NoSuchObject from Standard | |

56 | ||

57 | -- Modified by Sergey KHROMOV - Thu Mar 27 17:45:42 2003 End | |

58 | is | |

59 | ||

60 | Create(T: GTrsf from gp) | |

61 | ||

62 | returns GTransform from BRepBuilderAPI; | |

63 | ---Purpose: Constructs a framework for applying the geometric | |

64 | -- transformation T to a shape. Use the function | |

65 | -- Perform to define the shape to transform. | |

66 | ||

67 | ||

68 | Create(S: Shape from TopoDS; T: GTrsf from gp; | |

69 | Copy: Boolean from Standard = Standard_False) | |

70 | ||

71 | returns GTransform from BRepBuilderAPI; | |

72 | ---Purpose: Constructs a framework for applying the geometric | |

73 | -- transformation T to a shape, and applies it to the shape S. | |

74 | -- - If the transformation T is direct and isometric (i.e. if | |

75 | -- the determinant of the vectorial part of T is equal to | |

76 | -- 1.), and if Copy equals false (default value), the | |

77 | -- resulting shape is the same as the original but with | |

78 | -- a new location assigned to it. | |

79 | -- - In all other cases, the transformation is applied to | |

80 | -- a duplicate of S. | |

81 | -- Use the function Shape to access the result. | |

82 | -- Note: the constructed framework can be reused to | |

83 | -- apply the same geometric transformation to other | |

84 | -- shapes: just specify them with the function Perform. | |

85 | ||

86 | ||

87 | Perform(me: in out; S : Shape from TopoDS; | |

88 | Copy: Boolean from Standard = Standard_False) | |

89 | ||

90 | ---Purpose: Applies the geometric transformation defined at the | |

91 | -- time of construction of this framework to the shape S. | |

92 | -- - If the transformation T is direct and isometric (i.e. if | |

93 | -- the determinant of the vectorial part of T is equal to | |

94 | -- 1.), and if Copy equals false (default value), the | |

95 | -- resulting shape is the same as the original but with | |

96 | -- a new location assigned to it. | |

97 | -- - In all other cases, the transformation is applied to a duplicate of S. | |

98 | -- Use the function Shape to access the result. | |

99 | -- Note: this framework can be reused to apply the same | |

100 | -- geometric transformation to other shapes: just specify | |

101 | -- them by calling the function Perform again. | |

102 | ||

103 | is static; | |

104 | ||

105 | Modified (me: in out; S : Shape from TopoDS) | |

106 | ---Purpose: Returns the list of shapes modified from the shape | |

107 | -- <S>. | |

108 | ---C++: return const & | |

109 | ---Level: Public | |

110 | returns ListOfShape from TopTools | |

111 | is redefined virtual; | |

112 | ||

7fd59977 | 113 | ModifiedShape(me; S: Shape from TopoDS) |

114 | returns Shape from TopoDS | |

115 | ---Purpose: Returns the modified shape corresponding to <S>. | |

7fd59977 | 116 | raises NoSuchObject from Standard |

117 | -- if S is not the initial shape or a sub-shape | |

118 | -- of the initial shape. | |

119 | is redefined virtual; | |

7fd59977 | 120 | |

121 | fields | |

122 | ||

123 | myGTrsf : GTrsf from gp; | |

7fd59977 | 124 | myHist : Collect from BRepBuilderAPI; |

125 | ||

126 | end Transform; |