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occt/src/Select3D/Select3D_Projector.cxx
apl 197ac94e72 0024413: Visualization - get rid of projection shift from orthographic camera definition 
From now on, the panning behavior of V3d_View completely corresponds to equal operations with camera. There is no more confusing "Center" property and "ProjectionShift" which were used to introduce composite panning, while respecting view referential points: At, Eye unchanged. The V3d_View::FitAll approach has been rewritten to do "fit all" geometrically, operating with frustum, to make it working for both orthographic and perspective projections.

1) Getting rid of ProjectionShift and Center property:
- Removed ProjectionShift property of Graphic3d_Camera.
- Removed confusing Center property of V3d_View (related to projection shift).
- Removed redundant code related to the Center property of V3d_View.
- Removed WindowLimit method of Graphic3d_Camera - no more used.

2) Improvements of fit all and selector:
- Improved FitAll operation of V3d_View and reused it in NIS_View - the perspective projection is now handled correctly.
- Revised code of Select3D_Projector class - can be defined with any given projection and model-view matrices.
- Modified StdSelect_ViewerSelector3d and ensured that panning, zooming and going into the view do not lead to unwanted re-projection of sensitives. The handling of perspective selection is revised.
- Take into account graphical boundaries of infinite structure on ZFitAll.

3) Improvements of camera:
- Introduced new z range scale parameter for V3d_View::AutoZFit. See, V3d_View::AutoZFitMode.
- Allow negative ZNear, ZFar for orthographic camera to avoid clipping of viewed model.
- Moved camera ZNear, ZFar validity checks to V3d_View level.
- Use more meaningful Standard_ShortReal relative precision for ZNear, ZFar ranges computed by ZFitAll.
- Use Standard_Real type for camera projection and orientation matrices.
- Extended camera to generate both Standard_Real and Standard_ShortReal transformation matrices using the same matrix evaluation methods and converted input parameters.

Correcting picking tests for perspective view

Modify v3d face test cases for 1px changes in face picking

Modified test cases for new arguments of vviewparams DRAWEXE command
2014-03-06 15:50:33 +04:00

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// Created on: 1992-03-13
// Created by: Christophe MARION
// Copyright (c) 1992-1999 Matra Datavision
// Copyright (c) 1999-2014 OPEN CASCADE SAS
//
// This file is part of Open CASCADE Technology software library.
//
// This library is free software; you can redistribute it and/or modify it under
// the terms of the GNU Lesser General Public License version 2.1 as published
// by the Free Software Foundation, with special exception defined in the file
// OCCT_LGPL_EXCEPTION.txt. Consult the file LICENSE_LGPL_21.txt included in OCCT
// distribution for complete text of the license and disclaimer of any warranty.
//
// Alternatively, this file may be used under the terms of Open CASCADE
// commercial license or contractual agreement.
#include <Select3D_Projector.ixx>
#include <Precision.hxx>
#include <gp_Ax3.hxx>
#include <gp_Vec.hxx>
#include <gp_Vec2d.hxx>
#include <gp_Mat.hxx>
#include <Graphic3d_Vec4.hxx>
namespace
{
//=======================================================================
//function : TrsfType
//purpose :
//=======================================================================
static Standard_Integer TrsfType(const gp_GTrsf& theTrsf)
{
const gp_Mat& aMat = theTrsf.VectorialPart();
if ((Abs (aMat.Value (1, 1) - 1.0) < 1e-15)
&& (Abs (aMat.Value (2, 2) - 1.0) < 1e-15)
&& (Abs (aMat.Value (3, 3) - 1.0) < 1e-15))
{
return 1; // top
}
else if ((Abs (aMat.Value (1, 1) - 0.7071067811865476) < 1e-15)
&& (Abs (aMat.Value (1, 2) + 0.5) < 1e-15)
&& (Abs (aMat.Value (1, 3) - 0.5) < 1e-15)
&& (Abs (aMat.Value (2, 1) - 0.7071067811865476) < 1e-15)
&& (Abs (aMat.Value (2, 2) - 0.5) < 1e-15)
&& (Abs (aMat.Value (2, 3) + 0.5) < 1e-15)
&& (Abs (aMat.Value (3, 1)) < 1e-15)
&& (Abs (aMat.Value (3, 2) - 0.7071067811865476) < 1e-15)
&& (Abs (aMat.Value (3, 3) - 0.7071067811865476) < 1e-15))
{
return 0; // inverse axo
}
else if ((Abs (aMat.Value (1, 1) - 1.0) < 1e-15)
&& (Abs (aMat.Value (2, 3) - 1.0) < 1e-15)
&& (Abs (aMat.Value (3, 2) + 1.0) < 1e-15))
{
return 2; // front
}
else if ((Abs (aMat.Value (1, 1) - 0.7071067811865476) < 1e-15)
&& (Abs (aMat.Value (1, 2) - 0.7071067811865476) < 1e-15)
&& (Abs (aMat.Value (1, 3)) < 1e-15)
&& (Abs (aMat.Value (2, 1) + 0.5) < 1e-15)
&& (Abs (aMat.Value (2, 2) - 0.5) < 1e-15)
&& (Abs (aMat.Value (2, 3) - 0.7071067811865476) < 1e-15)
&& (Abs (aMat.Value (3, 1) - 0.5) < 1e-15)
&& (Abs (aMat.Value (3, 2) + 0.5) < 1e-15)
&& (Abs (aMat.Value (3, 3) - 0.7071067811865476) < 1e-15))
{
return 3; // axo
}
return -1;
}
//====== TYPE 0 (inverse axonometric)
// (0.7071067811865476, -0.5 , 0.4999999999999999)
// (0.7071067811865475, 0.5000000000000001, -0.5 )
// (0.0, 0.7071067811865475, 0.7071067811865476)
// ====== TYPE 1 (top)
// (1.0, 0.0, 0.0)
// (0.0, 1.0, 0.0)
// (0.0, 0.0, 1.0)
// ======= TYPE 2 (front)
// (1.0, 0.0 , 0.0)
// (0.0, 1.110223024625157e-16 , 1.0)
// (0.0, -1.0 , 1.110223024625157e-16)
// ======= TYPE 3 (axonometric)
// ( 0.7071067811865476, 0.7071067811865475, 0.0)
// (-0.5 , 0.5000000000000001, 0.7071067811865475)
// ( 0.4999999999999999, -0.5 , 0.7071067811865476)
}
// formula for derivating a perspective, from Mathematica
// X'[t] X[t] Z'[t]
// D1 = -------- + -------------
// Z[t] Z[t] 2
// 1 - ---- f (1 - ----)
// f f
//=======================================================================
//function : Select3D_Projector
//purpose :
//=======================================================================
Select3D_Projector::Select3D_Projector (const Handle(V3d_View)& theView)
: myPersp (Standard_False),
myFocus (0.0),
myType (-1)
{
SetView (theView);
}
//=======================================================================
//function : Select3D_Projector
//purpose :
//=======================================================================
Select3D_Projector::Select3D_Projector()
: myPersp (Standard_False),
myFocus (0.0),
myType (-1)
{
Scaled();
}
//=======================================================================
//function : Select3D_Projector
//purpose :
//=======================================================================
Select3D_Projector::Select3D_Projector (const gp_Ax2& theCS)
: myPersp (Standard_False),
myFocus (0.0),
myType (-1)
{
myScaledTrsf.SetTransformation (theCS);
myGTrsf.SetTrsf (myScaledTrsf);
Scaled();
}
//=======================================================================
//function : Select3D_Projector
//purpose :
//=======================================================================
Select3D_Projector::Select3D_Projector (const gp_Ax2& theCS, const Standard_Real theFocus)
: myPersp (Standard_True),
myFocus (theFocus),
myType (-1)
{
myScaledTrsf.SetTransformation (theCS);
myGTrsf.SetTrsf (myScaledTrsf);
Scaled();
}
//=======================================================================
//function : Select3D_Projector
//purpose :
//=======================================================================
Select3D_Projector::Select3D_Projector (const gp_Trsf& theViewTrsf,
const Standard_Boolean theIsPersp,
const Standard_Real theFocus)
: myPersp (theIsPersp),
myFocus (theFocus),
myGTrsf (theViewTrsf),
myScaledTrsf (theViewTrsf),
myType (-1)
{
Scaled();
}
//=======================================================================
//function : Select3D_Projector
//purpose :
//=======================================================================
Select3D_Projector::Select3D_Projector (const gp_GTrsf& theViewTrsf,
const Standard_Boolean theIsPersp,
const Standard_Real theFocus)
: myPersp (theIsPersp),
myFocus (theFocus),
myGTrsf (theViewTrsf),
myScaledTrsf (theViewTrsf.Trsf()),
myType (-1)
{
Scaled();
}
//=======================================================================
//function : Select3D_Projector
//purpose :
//=======================================================================
Select3D_Projector::Select3D_Projector (const Graphic3d_Mat4d& theViewTrsf,
const Graphic3d_Mat4d& theProjTrsf)
: myPersp (Standard_False),
myFocus (0.0),
myType (-1)
{
Set (theViewTrsf, theProjTrsf);
}
//=======================================================================
//function : Set
//purpose :
//=======================================================================
void Select3D_Projector::Set (const gp_Trsf& theViewTrsf,
const Standard_Boolean theIsPersp,
const Standard_Real theFocus)
{
myPersp = theIsPersp;
myFocus = theFocus;
myScaledTrsf = theViewTrsf;
myProjTrsf.InitIdentity();
Scaled();
}
//=======================================================================
//function : Set
//purpose :
//=======================================================================
void Select3D_Projector::Set (const Graphic3d_Mat4d& theViewTrsf,
const Graphic3d_Mat4d& theProjTrsf)
{
// Copy elements corresponding to common view-transformation
for (Standard_Integer aRowIt = 0; aRowIt < 3; ++aRowIt)
{
for (Standard_Integer aColIt = 0; aColIt < 4; ++aColIt)
{
myGTrsf.SetValue (aRowIt + 1, aColIt + 1, theViewTrsf.GetValue (aRowIt, aColIt));
}
}
// Adapt scaled transformation for compatibilty
gp_Dir aViewY (theViewTrsf.GetValue (0, 1), theViewTrsf.GetValue (1, 1), theViewTrsf.GetValue (2, 1));
gp_Dir aViewZ (theViewTrsf.GetValue (0, 2), theViewTrsf.GetValue (1, 2), theViewTrsf.GetValue (2, 2));
gp_XYZ aViewT (theViewTrsf.GetValue (0, 3), theViewTrsf.GetValue (1, 3), theViewTrsf.GetValue (2, 3));
gp_Dir aViewX = aViewY ^ aViewZ;
gp_Ax3 aViewAx3 (gp_Pnt (aViewT), aViewZ, aViewX);
myScaledTrsf.SetTransformation (aViewAx3);
myPersp = Standard_False;
myFocus = 0.0;
myProjTrsf = theProjTrsf;
Scaled();
}
//=======================================================================
//function : SetView
//purpose :
//=======================================================================
void Select3D_Projector::SetView (const Handle(V3d_View)& theView)
{
const Graphic3d_Mat4d& aViewTrsf = theView->Camera()->OrientationMatrix();
const Graphic3d_Mat4d& aProjTrsf = theView->Camera()->ProjectionMatrix();
gp_XYZ aFrameScale = theView->Camera()->ViewDimensions();
Graphic3d_Mat4d aScale;
aScale.ChangeValue (0, 0) = aFrameScale.X();
aScale.ChangeValue (1, 1) = aFrameScale.Y();
aScale.ChangeValue (2, 2) = aFrameScale.Z();
Graphic3d_Mat4d aScaledProjTrsf = aScale * aProjTrsf;
Set (aViewTrsf, aScaledProjTrsf);
}
//=======================================================================
//function : Scaled
//purpose :
//=======================================================================
void Select3D_Projector::Scaled (const Standard_Boolean theToCheckOptimized)
{
myType = -1;
if (!theToCheckOptimized && !myPersp && myProjTrsf.IsIdentity())
{
myType = TrsfType (myGTrsf);
}
myInvTrsf = myGTrsf.Inverted();
}
//=======================================================================
//function : Project
//purpose :
//=======================================================================
void Select3D_Projector::Project (const gp_Pnt& theP, gp_Pnt2d& thePout) const
{
Standard_Real aXout = 0.0;
Standard_Real aYout = 0.0;
Standard_Real aZout = 0.0;
Project (theP, aXout, aYout, aZout);
thePout.SetCoord (aXout, aYout);
}
//=======================================================================
//function : Project
//purpose :
//=======================================================================
void Select3D_Projector::Project (const gp_Pnt& theP,
Standard_Real& theX,
Standard_Real& theY,
Standard_Real& theZ) const
{
Graphic3d_Vec4d aTransformed (0.0, 0.0, 0.0, 1.0);
// view transformation
switch (myType)
{
case 0 : // inverse axo
{
Standard_Real aX07 = theP.X() * 0.7071067811865475;
Standard_Real aY05 = theP.Y() * 0.5;
Standard_Real aZ05 = theP.Z() * 0.5;
aTransformed.x() = aX07 - aY05 + aZ05;
aTransformed.y() = aX07 + aY05 - aZ05;
aTransformed.z() = 0.7071067811865475 * (theP.Y() + theP.Z());
break;
}
case 1 : // top
{
aTransformed.x() = theP.X();
aTransformed.y() = theP.Y();
aTransformed.z() = theP.Z();
break;
}
case 2 : // front
{
aTransformed.x() = theP.X();
aTransformed.y() = theP.Z();
aTransformed.z() = -theP.Y();
break;
}
case 3 : // axo
{
Standard_Real aXmy05 = (theP.X() - theP.Y()) * 0.5;
Standard_Real aZ07 = theP.Z() * 0.7071067811865476;
aTransformed.x() = 0.7071067811865476 * (theP.X() + theP.Y());
aTransformed.y() = -aXmy05 + aZ07;
aTransformed.z() = aXmy05 + aZ07;
break;
}
default :
{
gp_Pnt aTransformPnt = theP;
Transform (aTransformPnt);
aTransformed.x() = aTransformPnt.X();
aTransformed.y() = aTransformPnt.Y();
aTransformed.z() = aTransformPnt.Z();
}
}
// projection transformation
if (myPersp)
{
// simplified perspective
Standard_Real aDistortion = 1.0 - aTransformed.z() / myFocus;
theX = aTransformed.x() / aDistortion;
theY = aTransformed.y() / aDistortion;
theZ = aTransformed.z();
return;
}
if (myProjTrsf.IsIdentity())
{
// no projection transformation
theX = aTransformed.x();
theY = aTransformed.y();
theZ = aTransformed.z();
return;
}
Graphic3d_Vec4d aProjected = myProjTrsf * aTransformed;
theX = aProjected.x() / aProjected.w();
theY = aProjected.y() / aProjected.w();
theZ = aProjected.z() / aProjected.w();
}
//=======================================================================
//function : Project
//purpose :
//=======================================================================
void Select3D_Projector::Project (const gp_Pnt& theP,
const gp_Vec& theD1,
gp_Pnt2d& thePout,
gp_Vec2d& theD1out) const
{
// view transformation
gp_Pnt aTP = theP;
Transform (aTP);
gp_Vec aTD1 = theD1;
Transform (aTD1);
// projection transformation
if (myPersp)
{
// simplified perspective
Standard_Real aDist = 1.0 - aTP.Z() / myFocus;
thePout.SetCoord (aTP.X() / aDist, aTP.Y() / aDist);
theD1out.SetCoord (aTD1.X() / aDist + aTP.X() * aTD1.Z() / (myFocus * aDist * aDist),
aTD1.Y() / aDist + aTP.Y() * aTD1.Z() / (myFocus * aDist * aDist));
return;
}
if (myProjTrsf.IsIdentity())
{
// no projection transformation
thePout.SetCoord (aTP.X(), aTP.Y());
theD1out.SetCoord (aTD1.X(), aTD1.Y());
}
Graphic3d_Vec4d aTransformedPnt1 (aTP.X(), aTP.Y(), aTP.Z(), 1.0);
Graphic3d_Vec4d aTransformedPnt2 (aTP.X() + aTD1.X(), aTP.Y() + aTD1.Y(), aTP.Z() + aTD1.Z(), 1.0);
Graphic3d_Vec4d aProjectedPnt1 = myProjTrsf * aTransformedPnt1;
Graphic3d_Vec4d aProjectedPnt2 = myProjTrsf * aTransformedPnt2;
aProjectedPnt1 /= aProjectedPnt1.w();
aProjectedPnt2 /= aProjectedPnt2.w();
Graphic3d_Vec4d aProjectedD1 = aProjectedPnt2 - aProjectedPnt1;
thePout.SetCoord (aProjectedPnt1.x(), aProjectedPnt1.y());
theD1out.SetCoord (aProjectedD1.x(), aProjectedD1.y());
}
//=======================================================================
//function : Shoot
//purpose :
//=======================================================================
gp_Lin Select3D_Projector::Shoot (const Standard_Real theX, const Standard_Real theY) const
{
gp_Lin aViewLin;
if (myPersp)
{
// simplified perspective
aViewLin = gp_Lin (gp_Pnt (0.0, 0.0, myFocus), gp_Dir (theX, theY, -myFocus));
}
else if (myProjTrsf.IsIdentity())
{
// no projection transformation
aViewLin = gp_Lin (gp_Pnt (theX, theY, 0.0), gp_Dir (0.0, 0.0, -1.0));
}
else
{
// get direction of projection over the point in view space
Graphic3d_Mat4d aProjInv;
if (!myProjTrsf.Inverted (aProjInv))
{
return gp_Lin();
}
Graphic3d_Vec4d aVPnt1 = aProjInv * Graphic3d_Vec4d (theX, theY, 0.0, 1.0);
Graphic3d_Vec4d aVPnt2 = aProjInv * Graphic3d_Vec4d (theX, theY, 10.0, 1.0);
aVPnt1 /= aVPnt1.w();
aVPnt2 /= aVPnt1.w();
gp_Vec aViewDir (aVPnt2.x() - aVPnt1.x(), aVPnt2.y() - aVPnt1.y(), aVPnt2.z() - aVPnt1.z());
aViewLin = gp_Lin (gp_Pnt (aVPnt1.x(), aVPnt1.y(), aVPnt1.z()), gp_Dir (aViewDir));
}
// view transformation
Transform (aViewLin, myInvTrsf);
return aViewLin;
}
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