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// File: Prs3d.cxx
// Created: Fri Aug 27 09:48:54 1993
// Author: Jean-Louis FRENKEL
// <jlf@stylox>
#include <Prs3d.ixx>
Standard_Boolean Prs3d::MatchSegment
(const Quantity_Length X,
const Quantity_Length Y,
const Quantity_Length Z,
const Quantity_Length aDistance,
const gp_Pnt& P1,
const gp_Pnt& P2,
Quantity_Length& dist) {
Standard_Real X1,Y1,Z1,X2,Y2,Z2;
P1.Coord(X1,Y1,Z1); P2.Coord(X2,Y2,Z2);
Standard_Real DX = X2-X1;
Standard_Real DY = Y2-Y1;
Standard_Real DZ = Z2-Z1;
Standard_Real Dist = DX*DX + DY*DY + DZ*DZ;
if (Dist == 0.) return Standard_False;
Standard_Real Lambda = ((X-X1)*DX + (Y-Y1)*DY + (Z-Z1)*DZ)/Dist;
if ( Lambda < 0. || Lambda > 1. ) return Standard_False;
dist = Abs(X-X1-Lambda*DX) +
Abs(Y-Y1-Lambda*DY) +
Abs(Z-Z1-Lambda*DZ);
return (dist < aDistance);
}
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