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// File: DrawTrSurf_Drawable.cxx
// Created: Tue Jul 16 09:22:44 1991
// Author: Christophe MARION
// <cma@sdsun1>
#include <DrawTrSurf_Drawable.ixx>
#include <GCPnts_UniformDeflection.hxx>
#include <gp_Pnt.hxx>
#include <gp_Pnt2d.hxx>
#include <TColStd_Array1OfReal.hxx>
#include <GeomAdaptor_Curve.hxx>
#include <Geom_BezierCurve.hxx>
#include <Geom_BSplineCurve.hxx>
#include <Precision.hxx>
//=======================================================================
//function : DrawTrSurf_Drawable
//purpose : initialise the discretisation
//=======================================================================
DrawTrSurf_Drawable::DrawTrSurf_Drawable (
const Standard_Integer discret,
const Standard_Real deflection,
const Standard_Integer DrawMode ) :
myDrawMode (DrawMode),
myDiscret(discret),
myDeflection(deflection)
{
}
//=======================================================================
//function : DrawCurve2dOn
//purpose : draw a 2D curve
//=======================================================================
void DrawTrSurf_Drawable::DrawCurve2dOn (Adaptor2d_Curve2d& C,
Draw_Display& aDisplay) const
{
gp_Pnt P;
gp_Pnt2d aPoint2d,
*aPoint2dPtr ;
if (myDrawMode == 1) {
Standard_Real Fleche = myDeflection/aDisplay.Zoom();
GCPnts_UniformDeflection LineVu(C,Fleche);
if (LineVu.IsDone()) {
P = LineVu.Value(1) ;
aPoint2dPtr = (gp_Pnt2d *) &P ;
aDisplay.MoveTo(*aPoint2dPtr);
for (Standard_Integer i = 2; i <= LineVu.NbPoints(); i++) {
P = LineVu.Value(i) ;
aPoint2dPtr = (gp_Pnt2d *) &P ;
aDisplay.DrawTo(*aPoint2dPtr);
}
}
}
else {
Standard_Integer intrv, nbintv = C.NbIntervals(GeomAbs_CN);
TColStd_Array1OfReal TI(1,nbintv+1);
C.Intervals(TI,GeomAbs_CN);
C.D0(C.FirstParameter(),aPoint2d);
aDisplay.MoveTo(aPoint2d);
for (intrv = 1; intrv <= nbintv; intrv++) {
if (C.GetType() != GeomAbs_Line) {
Standard_Real t = TI(intrv);
Standard_Real step = (TI(intrv+1) - t) / myDiscret;
for (Standard_Integer i = 1; i < myDiscret; i++) {
t += step;
C.D0(t,aPoint2d);
aDisplay.DrawTo(aPoint2d);
}
}
C.D0(TI(intrv+1),aPoint2d);
aDisplay.DrawTo(aPoint2d);
}
}
}
//=======================================================================
//static function : PlotCurve
//purpose : draw a 3D curve
//=======================================================================
static void PlotCurve (Draw_Display& aDisplay,
const Adaptor3d_Curve& C,
Standard_Real& theFirstParam,
Standard_Real theHalfStep,
const gp_Pnt& theFirstPnt,
const gp_Pnt& theLastPnt)
{
Standard_Real IsoRatio = 1.001;
gp_Pnt Pm;
C.D0 (theFirstParam + theHalfStep, Pm);
Standard_Real dfLength = theFirstPnt.Distance(theLastPnt);
if (dfLength < Precision::Confusion() ||
Pm.Distance(theFirstPnt) + Pm.Distance(theLastPnt) <= IsoRatio*dfLength) {
aDisplay.DrawTo (theLastPnt);
} else {
PlotCurve (aDisplay, C, theFirstParam, theHalfStep/2., theFirstPnt, Pm);
Standard_Real aLocalF = theFirstParam + theHalfStep;
PlotCurve (aDisplay, C, aLocalF, theHalfStep/2., Pm, theLastPnt);
}
}
//=======================================================================
//function : DrawCurveOn
//purpose : draw a 3D curve
//=======================================================================
void DrawTrSurf_Drawable::DrawCurveOn (Adaptor3d_Curve& C,
Draw_Display& aDisplay) const
{
gp_Pnt P;
if (myDrawMode == 1) {
Standard_Real Fleche = myDeflection/aDisplay.Zoom();
GCPnts_UniformDeflection LineVu(C,Fleche);
if (LineVu.IsDone()) {
aDisplay.MoveTo(LineVu.Value(1));
for (Standard_Integer i = 2; i <= LineVu.NbPoints(); i++) {
aDisplay.DrawTo(LineVu.Value(i));
}
}
}
else {
Standard_Real j;
Standard_Integer intrv, nbintv = C.NbIntervals(GeomAbs_CN);
TColStd_Array1OfReal TI(1,nbintv+1);
C.Intervals(TI,GeomAbs_CN);
C.D0(C.FirstParameter(),P);
aDisplay.MoveTo(P);
GeomAbs_CurveType CurvType = C.GetType();
gp_Pnt aPPnt=P, aNPnt;
for (intrv = 1; intrv <= nbintv; intrv++) {
Standard_Real t = TI(intrv);
Standard_Real step = (TI(intrv+1) - t) / myDiscret;
switch (CurvType) {
case GeomAbs_Line :
break;
case GeomAbs_Circle :
case GeomAbs_Ellipse :
for (j = 1; j < myDiscret; j++) {
t += step;
C.D0(t,P);
aDisplay.DrawTo(P);
}
break;
case GeomAbs_Parabola :
case GeomAbs_Hyperbola :
case GeomAbs_BezierCurve :
case GeomAbs_BSplineCurve :
case GeomAbs_OtherCurve :
for (j = 1; j <= myDiscret/2; j++) {
C.D0 (t+step*2., aNPnt);
PlotCurve (aDisplay, C, t, step, aPPnt, aNPnt);
aPPnt = aNPnt;
t += step*2.;
}
break;
}
C.D0(TI(intrv+1),P);
aDisplay.DrawTo(P);
}
}
}
//=======================================================================
//function : DrawIsoCurveOn
//purpose :
//=======================================================================
void DrawTrSurf_Drawable::DrawIsoCurveOn(Adaptor3d_IsoCurve& C,
const GeomAbs_IsoType T,
const Standard_Real P,
const Standard_Real F,
const Standard_Real L,
Draw_Display& dis) const
{
C.Load(T,P,F,L);
if ((C.GetType() == GeomAbs_BezierCurve) ||
(C.GetType() == GeomAbs_BSplineCurve)) {
GeomAdaptor_Curve GC;
if (C.GetType() == GeomAbs_BezierCurve)
GC.Load(C.Bezier(),F,L);
else
GC.Load(C.BSpline(),F,L);
DrawCurveOn(GC,dis);
}
else
DrawCurveOn(C,dis);
}
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