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// Copyright: Matra-Datavision 1991
// File: Draw_Display.cxx
// Created: Mon Jul 15 10:58:59 1991
// Author: Arnaud BOUZY
// <adn>
#include <Draw_Display.ixx>
#include <ElCLib.hxx>
extern Standard_Boolean Draw_Bounds;
//=======================================================================
//function : DrawMarker
//purpose :
//=======================================================================
void Draw_Display::DrawMarker (const gp_Pnt& pt,
const Draw_MarkerShape S,
const Standard_Integer Size)
{
gp_Pnt2d p;
Project(pt,p);
DrawMarker(p,S,Size);
}
//=======================================================================
//function : DrawMarker
//purpose :
//=======================================================================
void Draw_Display::DrawMarker (const gp_Pnt2d& pt,
const Draw_MarkerShape S,
const Standard_Integer ISize)
{
Draw_Bounds = Standard_False;
gp_Pnt2d p1 = pt;
gp_Pnt2d p2 = p1;
gp_Circ2d C;
Standard_Real Size = ((Standard_Real) ISize) / Zoom();
switch (S) {
case Draw_Square :
p1.Translate(gp_Vec2d(-Size,-Size));
p2.Translate(gp_Vec2d( Size,-Size));
Draw(p1,p2);
p1.Translate(gp_Vec2d(2*Size,2*Size));
Draw(p1,p2);
p2.Translate(gp_Vec2d(-2*Size,2*Size));
Draw(p1,p2);
p1.Translate(gp_Vec2d(-2*Size,-2*Size));
Draw(p1,p2);
break;
case Draw_Losange :
p1.Translate(gp_Vec2d(-Size,0));
p2.Translate(gp_Vec2d( 0,Size));
Draw(p1,p2);
p1.Translate(gp_Vec2d(2*Size,0));
Draw(p1,p2);
p2.Translate(gp_Vec2d(0,-2*Size));
Draw(p1,p2);
p1.Translate(gp_Vec2d(-2*Size,0));
Draw(p1,p2);
break;
case Draw_X :
p1.Translate(gp_Vec2d(-Size,-Size));
p2.Translate(gp_Vec2d( Size,Size));
Draw(p1,p2);
p1.Translate(gp_Vec2d(2*Size,0));
p2.Translate(gp_Vec2d(-2*Size,0));
Draw(p1,p2);
break;
case Draw_Plus :
p1.Translate(gp_Vec2d(-Size,0));
p2.Translate(gp_Vec2d( Size,0));
Draw(p1,p2);
p1.Translate(gp_Vec2d(Size,Size));
p2.Translate(gp_Vec2d(-Size,-Size));
Draw(p1,p2);
break;
case Draw_Circle :
// gp_Circ2d C;
C.SetRadius(ISize);
C.SetLocation(pt);
Draw(C, 0, 2*PI, Standard_False);
break;
#ifndef DEB
default:
break;
#endif
}
Draw_Bounds = Standard_True;
MoveTo(pt);
}
//=======================================================================
//function : DrawMarker
//purpose :
//=======================================================================
void Draw_Display::DrawMarker (const gp_Pnt& pt,
const Draw_MarkerShape S,
const Standard_Real Size)
{
gp_Pnt2d p;
Project(pt,p);
DrawMarker(p,S,Size);
}
//=======================================================================
//function : DrawMarker
//purpose :
//=======================================================================
void Draw_Display::DrawMarker (const gp_Pnt2d& pt,
const Draw_MarkerShape S,
const Standard_Real R)
{
switch (S) {
case Draw_Square :
case Draw_Losange :
case Draw_X :
case Draw_Plus :
case Draw_Circle :
{
Standard_Integer I = (Standard_Integer ) R;
if(!I) return;
DrawMarker(pt, S, I);
break;
}
case Draw_CircleZoom :
if(R == 0.0) return;
gp_Circ2d C;
C.SetRadius(R);
C.SetLocation(pt);
// if the circus is too small, a "plus" is drawn to mark the point
Standard_Boolean b = (R * Zoom()) > 2;
if(b)
Draw(C, 0, 2*PI);
else
DrawMarker(pt, Draw_Plus);
}
Draw_Bounds = Standard_True;
MoveTo(pt);
}
#define MAXPNT 200
#define DEFLECTION 5
//=======================================================================
//function : Draw
//purpose :
//=======================================================================
void Draw_Display::Draw(const gp_Circ& C, const Standard_Real A1,const Standard_Real A3,
const Standard_Boolean ModifyWithZoom)
{
Standard_Real A2 = A3;
while (A2 < A1) A2 += 2*PI;
Standard_Real angle = DEFLECTION / (C.Radius() * Zoom());
Standard_Integer n = (Standard_Integer )( (A2 - A1) / angle);
if (n > MAXPNT) {
angle = (A2 - A1) / MAXPNT;
n = MAXPNT;
}
if (n <= 6) {
angle = (A2 - A1) / 6;
n = 6;
}
Standard_Real c = 2*Cos(angle);
gp_Circ Cloc(C);
if(!ModifyWithZoom) {
Standard_Integer ISize = (Standard_Integer )( Cloc.Radius() / Zoom());
Cloc.SetRadius(ISize);
}
gp_Pnt PC = Cloc.Location();
gp_Pnt P = ElCLib::Value(A1,Cloc);
MoveTo(P);
gp_Vec V1(PC,P);
P = ElCLib::Value(A1+angle,Cloc);
gp_Vec V2(PC,P);
DrawTo(P);
gp_Vec V;
for (Standard_Integer i = 2; i < n; i++) {
V = c * V2 - V1;
V1 = V2;
V2 = V;
DrawTo(PC.Translated(V));
}
P = ElCLib::Value(A2,Cloc);
DrawTo(P);
}
//=======================================================================
//function : Draw
//purpose :
//=======================================================================
void Draw_Display::Draw(const gp_Circ2d& C, const Standard_Real A1, const Standard_Real A3,
const Standard_Boolean ModifyWithZoom)
{
Standard_Real A2 = A3;
while (A2 < A1) A2 += 2*PI;
Standard_Real angle = DEFLECTION / (C.Radius() * Zoom());
Standard_Integer n = (Standard_Integer )( (A2 - A1) / angle);
if (n > MAXPNT) {
angle = (A2 - A1) / MAXPNT;
n = MAXPNT;
}
else if (n <= 6) {
angle = (A2 - A1) / 6;
n = 6;
}
Standard_Real c = 2*Cos(angle);
gp_Circ2d Cloc(C);
if(!ModifyWithZoom) {// the effet of zoom is cancelled to follow
Standard_Real Size = Cloc.Radius() / Zoom();
Cloc.SetRadius(Size);
}
gp_Pnt2d PC = Cloc.Location();
gp_Pnt2d P = ElCLib::Value(A1,Cloc);
MoveTo(P);
gp_Vec2d V1(PC,P);
P = ElCLib::Value(A1+angle,Cloc);
gp_Vec2d V2(PC,P);
DrawTo(P);
gp_Vec2d V;
for (Standard_Integer i = 2; i < n; i++) {
V = c * V2 - V1;
V1 = V2;
V2 = V;
DrawTo(PC.Translated(V));
}
P = ElCLib::Value(A2,Cloc);
DrawTo(P);
}
//=======================================================================
//function : Project
//purpose :
//=======================================================================
gp_Pnt2d Draw_Display::Project(const gp_Pnt& p) const
{
gp_Pnt2d pt;
Project(p,pt);
return pt;
}
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