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53 lines
1.8 KiB
Plaintext
Executable File
53 lines
1.8 KiB
Plaintext
Executable File
-- File: Intersection2d.cdl
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-- Created: Tue Nov 17 12:24:18 1992
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-- Author: Remi LEQUETTE
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-- <rle@phylox>
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---Copyright: Matra Datavision 1992
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deferred generic class Intersection2d from TopClass
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(TheEdge as any) inherits Intersection from IntRes2d
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---Purpose: Template class for the intersection algorithm
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-- required by the 2D classifications.
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--
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-- The results should be expressed as the result of
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-- Intersection from IntRes2d. The class used to
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-- instantiate the Classifier2d can be inherited from
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-- the Intersection algorithms inherited from
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-- Intersection from IntRes2d.
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--
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-- It is not necesary to return all the Intersection
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-- points, the point with the smallest parameter
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-- value on the segment is enough.
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uses
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Lin2d from gp,
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Dir2d from gp
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is
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Initialize;
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---Purpose: An empty constructor is required.
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Perform(me : in out; L : Lin2d from gp; P : Real; Tol : Real; E : TheEdge)
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---Purpose: Performs the intersection between the 2d line
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-- segment (<L>, <P>) and the Edge <E>. The line
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-- segment is the part of the 2d line <L> of
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-- parameter range [0, <P>] (P is positive and can be
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-- RealLast()). Tol is the Tolerance on the segment.
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-- The order is relevant, the first argument is the
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-- segment, the second the Edge.
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is deferred;
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LocalGeometry(me; E : TheEdge; U : Real;
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T : out Dir2d from gp;
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N : out Dir2d from gp;
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C : out Real)
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---Purpose: Returns in <T>, <N> and <C> the tangent, normal
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-- and curvature of the edge <E> at parameter value
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-- <U>.
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is deferred;
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end Intersection2d;
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