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b311480e | 1 | -- Created on: 1992-03-26 |

2 | -- Created by: Laurent BUCHARD | |

3 | -- Copyright (c) 1992-1999 Matra Datavision | |

4 | -- Copyright (c) 1999-2012 OPEN CASCADE SAS | |

5 | -- | |

6 | -- The content of this file is subject to the Open CASCADE Technology Public | |

7 | -- License Version 6.5 (the "License"). You may not use the content of this file | |

8 | -- except in compliance with the License. Please obtain a copy of the License | |

9 | -- at http://www.opencascade.org and read it completely before using this file. | |

10 | -- | |

11 | -- The Initial Developer of the Original Code is Open CASCADE S.A.S., having its | |

12 | -- main offices at: 1, place des Freres Montgolfier, 78280 Guyancourt, France. | |

13 | -- | |

14 | -- The Original Code and all software distributed under the License is | |

15 | -- distributed on an "AS IS" basis, without warranty of any kind, and the | |

16 | -- Initial Developer hereby disclaims all such warranties, including without | |

17 | -- limitation, any warranties of merchantability, fitness for a particular | |

18 | -- purpose or non-infringement. Please see the License for the specific terms | |

19 | -- and conditions governing the rights and limitations under the License. | |

20 | ||

7fd59977 | 21 | |

22 | ||

23 | ||

24 | deferred class ImpTool from IntImpParGen | |

25 | ||

26 | ---Purpose: Template class for an implicit curve. | |

27 | ||

28 | ||

29 | uses Pnt2d from gp, | |

30 | Vec2d from gp | |

31 | ||

32 | is | |

33 | ||

34 | ||

35 | Value (me; U: Real from Standard) | |

36 | ||

37 | --Purpose: Computes the point at parameter U on the | |

38 | -- Implicit Curve. | |

39 | ||

40 | returns Pnt2d from gp | |

41 | is static; | |

42 | ||

43 | ||

44 | D1 (me; U: Real from Standard ; P: out Pnt2d; T: out Vec2d) | |

45 | ||

46 | --Purpose: Computes the first derivative and the point on the | |

47 | -- implicit curve at parameter U. | |

48 | ||

49 | is static; | |

50 | ||

51 | ||

52 | D2 (me; U: Real from Standard ; P: out Pnt2d; T,N: out Vec2d) | |

53 | ||

54 | --Purpose: Computes the first, the second derivatives | |

55 | -- and the point on the implicit curve at parameter U. | |

56 | ||

57 | is static; | |

58 | ||

59 | ||

60 | Distance(me; P: Pnt2d from gp) | |

61 | ||

62 | ---Purpose: Computes the value of the signed distance between | |

63 | -- the point P and the implicit curve. | |

64 | -- | |

65 | ||

66 | returns Real from Standard | |

67 | is static; | |

68 | ||

69 | ||

70 | GradDistance(me; P: Pnt2d from gp) | |

71 | ||

72 | ---Purpose: Computes the Gradient of the Signed Distance | |

73 | -- between a point and the implicit curve, at the | |

74 | -- point P. | |

75 | -- | |

76 | ||

77 | returns Vec2d from gp | |

78 | is static; | |

79 | ||

80 | ||

81 | FindParameter(me; P: Pnt2d from gp) | |

82 | ||

83 | ---Purpose: Returns the parameter U of the point on the | |

84 | -- implicit curve corresponding to the point P. | |

85 | -- The correspondance between P and the point P(U) on | |

86 | -- the implicit curve must be coherent with the way | |

87 | -- of determination of the signed distance. | |

88 | ||

89 | returns Real from Standard | |

90 | is static; | |

91 | ||

92 | ||

93 | end ImpTool; | |

94 | ||

95 | ||

96 | ||

97 | ||

98 | ||

99 | ||

100 | ||

101 |