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occt/src/V3d/V3d_PositionalLight.cxx
apl c357e42610 0024776: Visualization - inherit OpenGl_View from Graphic3d_CView 
Expose interface of OpenGl_View (OpenGL graphics rendering methods) to client code
and collecting all high-level API methods of application views in V3d_View class.

1) Exposing interface of OpenGl_View:

The OpenGl_View inherits from new class Graphic3d_CView.
Graphic3d_CView is an interface class that declares abstract methods for managing displayed structures,
display properties and a base layer code that implements computation
and management of HLR (or more broadly speaking view-depended) structures.

In new implementation it takes place of eliminated Visual3d_View.
As before the instance of Graphic3d_CView is still completely managed by V3d_View classes.
It can be accessed through V3d_View interface but normally this should not be required as all its methods are completely wrapped.

In more details, a concrete specialization of Graphic3d_CView is created and returned by graphical driver on request.
Right after creation the views is directly used for setting rendering properties and adding graphical structures to be displayed.

The rendering of graphics is possible after mapping a window and activating the view.
The direct setting of properties makes obsolete usage of intermediate structures with display parameter
like Visual3d_ContextView and etc (the whole package of Visual3d become redundant).

2) Collecting all high-level API methods of application views in V3d package:

The patch includes elimination of Visual3d layer.
All of its methods that could be previously used by application are now exposed and should be accessed on the level of V3d entities.
- Introduced new class Graphic3d_CView.
  This is a base class for render views.
  Made possible to specialize concrete instances of the class by graphical driver.
- Moved all methods managing rendering views into interface of Graphic3d_CView.
  The corresponding methods were removed from interface of graphical driver.

3) Eliminated Visual3d package:

- Logic of managing display of structures was put from Visual3d_ViewManager into Graphic3d_StructureManager.
- Removed Visual3d_View class. Logic of managing computed structures was put into base layer of Graphi3d_CView.
- Removed all intermediate structures for storing view parameters e.g. Visual3d_ContextView.
  All settings are kept by instances of Graphic3d_CView
- Removed Visual3d_Light intermediate class.
  All light properties are still stored in Graphic3d_CLight structure.
  The structure is directly access by instance of V3d_Light classes.
- Moved all needed enumerations into Graphic3d package.

4) Update package D3DHost to new changes.

5) Update code of OCCT samples to new changes.
2015-09-22 11:49:33 +03:00

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// 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.
/***********************************************************************
FONCTION :
----------
Classe V3d_PositionalLight :
HISTORIQUE DES MODIFICATIONS :
--------------------------------
00-09-92 : GG ; Creation.
18-06-96 : FMN ; Ajout MyGraphicStructure1 pour sauvegarder snopick
24-12-97 : FMN ; Remplacement de math par MathGra
31-12-97 : CAL ; Suppression de MathGra
21-01-98 : CAL ; Window de Xw et WNT remplacee par Aspect_Window
23-02-98 : FMN ; Remplacement PI par Standard_PI
30-03-98 : ZOV ; PRO6774 (reconstruction of the class hierarchy and suppressing useless methods)
************************************************************************/
/*----------------------------------------------------------------------*/
/*
* Includes
*/
#include <Aspect_Window.hxx>
#include <gp_Ax1.hxx>
#include <gp_Dir.hxx>
#include <gp_Pnt.hxx>
#include <gp_Trsf.hxx>
#include <gp_Vec.hxx>
#include <Graphic3d_ArrayOfSegments.hxx>
#include <Graphic3d_AspectLine3d.hxx>
#include <Graphic3d_AspectMarker3d.hxx>
#include <Graphic3d_AspectText3d.hxx>
#include <Graphic3d_Group.hxx>
#include <Graphic3d_Structure.hxx>
#include <Graphic3d_Vector.hxx>
#include <Graphic3d_Vertex.hxx>
#include <Standard_Type.hxx>
#include <TCollection_AsciiString.hxx>
#include <TColStd_Array2OfReal.hxx>
#include <V3d.hxx>
#include <V3d_BadValue.hxx>
#include <V3d_PositionalLight.hxx>
#include <V3d_View.hxx>
#include <V3d_Viewer.hxx>
// =======================================================================
// function : V3d_PositionalLight
// purpose :
// =======================================================================
V3d_PositionalLight::V3d_PositionalLight (const Handle(V3d_Viewer)& theViewer,
const Standard_Real theX,
const Standard_Real theY,
const Standard_Real theZ,
const Quantity_NameOfColor theColor,
const Standard_Real theConstAttenuation,
const Standard_Real theLinearAttenuation)
: V3d_PositionLight (theViewer)
{
SetType (V3d_POSITIONAL);
SetColor (Quantity_Color (theColor));
SetTarget (0., 0., 0.);
SetPosition (theX, theY, theZ);
SetAttenuation (theConstAttenuation, theLinearAttenuation);
}
// =======================================================================
// function : V3d_PositionalLight
// purpose :
// =======================================================================
V3d_PositionalLight::V3d_PositionalLight (const Handle(V3d_Viewer)& theViewer,
const Standard_Real theXt,
const Standard_Real theYt,
const Standard_Real theZt,
const Standard_Real theXp,
const Standard_Real theYp,
const Standard_Real theZp,
const Quantity_NameOfColor theColor,
const Standard_Real theConstAttenuation,
const Standard_Real theLinearAttenuation)
: V3d_PositionLight (theViewer)
{
SetType (V3d_POSITIONAL);
SetColor (Quantity_Color (theColor));
SetTarget (theXt, theYt, theZt);
SetPosition (theXp, theYp, theZp);
SetAttenuation (theConstAttenuation, theLinearAttenuation);
}
// =======================================================================
// function : SetSmoothRadius
// purpose :
// =======================================================================
void V3d_PositionalLight::SetSmoothRadius (const Standard_Real theValue)
{
V3d_BadValue_Raise_if (theValue < 0.0,
"V3d_PositionalLight::SetSmoothRadius,"
"Bad value for smoothing radius");
myLight.Smoothness = static_cast<Standard_ShortReal> (theValue);
}
// =======================================================================
// function : SetPosition
// purpose :
// =======================================================================
void V3d_PositionalLight::SetPosition (const Standard_Real theXp,
const Standard_Real theYp,
const Standard_Real theZp)
{
myLight.Position.x() = static_cast<Standard_ShortReal> (theXp);
myLight.Position.y() = static_cast<Standard_ShortReal> (theYp);
myLight.Position.z() = static_cast<Standard_ShortReal> (theZp);
}
// =======================================================================
// function : SetAttenuation
// purpose :
// =======================================================================
void V3d_PositionalLight::SetAttenuation (const Standard_Real theConstAttenuation,
const Standard_Real theLinearAttenuation)
{
V3d_BadValue_Raise_if (theConstAttenuation < 0.
|| theConstAttenuation > 1.
|| theLinearAttenuation < 0.
|| theLinearAttenuation > 1.,
"V3d_PositionalLight::SetAttenuation, bad coefficients");
myLight.ChangeConstAttenuation() = static_cast<Standard_ShortReal> (theConstAttenuation);
myLight.ChangeLinearAttenuation() = static_cast<Standard_ShortReal> (theLinearAttenuation);
}
// =======================================================================
// function : Position
// purpose :
// =======================================================================
void V3d_PositionalLight::Position (Standard_Real& theX, Standard_Real& theY, Standard_Real& theZ) const
{
theX = myLight.Position.x();
theY = myLight.Position.y();
theZ = myLight.Position.z();
}
// =======================================================================
// function : Attenuation
// purpose :
// =======================================================================
void V3d_PositionalLight::Attenuation (Standard_Real& theConstAttenuation,
Standard_Real& theLinearAttenuation) const
{
theConstAttenuation = myLight.ConstAttenuation();
theLinearAttenuation = myLight.LinearAttenuation();
}
// =======================================================================
// function : Symbol
// purpose :
// =======================================================================
void V3d_PositionalLight::Symbol (const Handle(Graphic3d_Group)& theSymbol, const Handle(V3d_View)& theView) const
{
Standard_Real Xi,Yi,Zi,Xf,Yf,Zf,Rayon,PXT,PYT,X,Y,Z,XT,YT,ZT;
Standard_Real A,B,C,Dist,Beta,CosBeta,SinBeta,Coef,X1,Y1,Z1;
Standard_Real VX,VY,VZ;
Standard_Integer IXP,IYP,j;
TColStd_Array2OfReal MatRot(0,2,0,2);
theView->Proj(VX,VY,VZ);
this->Position(Xi,Yi,Zi);
Rayon = this->Radius();
theView->Project(Xi,Yi,Zi,PXT,PYT);
theView->Convert(PXT,PYT,IXP,IYP);
// 3D Coordinate in the plane of projection of the source.
theView->Convert(IXP,IYP,XT,YT,ZT);
theView->Convert(PXT,PYT+Rayon,IXP,IYP);
theView->Convert(IXP,IYP,X,Y,Z);
X = X+Xi-XT; Y = Y+Yi-YT; Z = Z+Zi-ZT;
Dist = Sqrt( Square(X-Xi) + Square(Y-Yi) + Square(Z-Zi) );
// Axis of rotation.
A = (X-Xi)/Dist;
B = (Y-Yi)/Dist;
C = (Z-Zi)/Dist;
// A sphere is drawn
V3d::CircleInPlane(theSymbol,Xi,Yi,Zi,VX,VY,VZ,Rayon/40.);
for( j=1 ; j<=3 ; j++ ) {
Beta = j * M_PI / 4.;
CosBeta = Cos(Beta);
SinBeta = Sin(Beta);
Coef = 1. - CosBeta;
MatRot(0,0) = A * A + (1. - A * A) * CosBeta;
MatRot(0,1) = -C * SinBeta + Coef * A * B;
MatRot(0,2) = B * SinBeta + Coef * A * C;
MatRot(1,0) = C * SinBeta + Coef * A * B;
MatRot(1,1) = B * B + (1. - B * B) * CosBeta;
MatRot(1,2) = -A * SinBeta + Coef * B * C;
MatRot(2,0) = -B * SinBeta + Coef * A * C;
MatRot(2,1) = A * SinBeta + Coef * B * C;
MatRot(2,2) = C * C + (1. - C * C) * CosBeta;
Xf = Xi * MatRot(0,0) + Yi * MatRot(0,1) + Zi * MatRot(0,2);
Yf = Xi * MatRot(1,0) + Yi * MatRot(1,1) + Zi * MatRot(1,2);
Zf = Xi * MatRot(2,0) + Yi * MatRot(2,1) + Zi * MatRot(2,2);
// Rotation of the normal
X1 = VX * MatRot(0,0) + VY * MatRot(0,1) + VZ * MatRot(0,2);
Y1 = VX * MatRot(1,0) + VY * MatRot(1,1) + VZ * MatRot(1,2);
Z1 = VX * MatRot(2,0) + VY * MatRot(2,1) + VZ * MatRot(2,2);
VX = X1 + Xi - Xf ; VY = Y1 + Yi - Yf ; VZ = Z1 + Zi - Zf;
V3d::CircleInPlane(theSymbol,Xi,Yi,Zi,VX,VY,VZ,Rayon/40.);
}
}
// =======================================================================
// function : Display
// purpose :
// =======================================================================
void V3d_PositionalLight::Display (const Handle(V3d_View)& theView,
const V3d_TypeOfRepresentation theRepresentation)
{
Graphic3d_Vertex PText ;
Standard_Real X,Y,Z,Rayon;
Standard_Real X0,Y0,Z0,VX,VY,VZ;
Standard_Real X1,Y1,Z1;
Standard_Real DXRef,DYRef,DZRef,DXini,DYini,DZini;
Standard_Real R1,G1,B1;
V3d_TypeOfRepresentation Pres;
V3d_TypeOfUpdate UpdSov;
// Creation of a structure slight of markable elements (position of the
// light, and the domain of lighting represented by a circle)
// Creation of a structure snopick of non-markable elements (target, meridian and
// parallel).
Pres = theRepresentation;
Handle(V3d_Viewer) TheViewer = theView->Viewer();
UpdSov = TheViewer->UpdateMode();
TheViewer->SetUpdateMode(V3d_WAIT);
if (!myGraphicStructure.IsNull()) {
myGraphicStructure->Disconnect(myGraphicStructure1);
myGraphicStructure->Clear();
myGraphicStructure1->Clear();
if (Pres == V3d_SAMELAST) Pres = myTypeOfRepresentation;
}
else {
if (Pres == V3d_SAMELAST) Pres = V3d_SIMPLE;
Handle(Graphic3d_Structure) slight = new Graphic3d_Structure(TheViewer->StructureManager());
myGraphicStructure = slight;
Handle(Graphic3d_Structure) snopick = new Graphic3d_Structure(TheViewer->StructureManager());
myGraphicStructure1 = snopick;
}
Handle(Graphic3d_Group) gradius, gExtArrow, gIntArrow;
if (Pres == V3d_COMPLETE)
{
gradius = myGraphicStructure->NewGroup();
gExtArrow = myGraphicStructure->NewGroup();
gIntArrow = myGraphicStructure->NewGroup();
}
Handle(Graphic3d_Group) glight = myGraphicStructure->NewGroup();
Handle(Graphic3d_Group) gsphere;
if (Pres == V3d_COMPLETE
|| Pres == V3d_PARTIAL)
{
gsphere = myGraphicStructure->NewGroup();
}
Handle(Graphic3d_Group) gnopick = myGraphicStructure1->NewGroup();
X0 = myTarget.X();
Y0 = myTarget.Y();
Z0 = myTarget.Z();
// Display of the position of the light.
this->Color(Quantity_TOC_RGB,R1,G1,B1);
Quantity_Color Col1(R1,G1,B1,Quantity_TOC_RGB);
Handle(Graphic3d_AspectLine3d) Asp1 = new Graphic3d_AspectLine3d();
Asp1->SetColor(Col1);
glight->SetPrimitivesAspect(Asp1);
this->Symbol(glight,theView);
// Display of the markable sphere (limit at the cercle).
if (Pres == V3d_COMPLETE || Pres == V3d_PARTIAL) {
Rayon = this->Radius();
theView->Proj(VX,VY,VZ);
V3d::CircleInPlane(gsphere,X0,Y0,Z0,VX,VY,VZ,Rayon);
// Display of the radius of the sphere (line + text)
if (Pres == V3d_COMPLETE) {
this->Position(X,Y,Z);
Handle(Graphic3d_ArrayOfSegments) aPrims = new Graphic3d_ArrayOfSegments(2);
aPrims->AddVertex(X0,Y0,Z0);
aPrims->AddVertex(X,Y,Z);
gnopick->AddPrimitiveArray(aPrims);
V3d::ArrowOfRadius(gExtArrow,X-.1*(X-X0),Y-.1*(Y-Y0),Z-.1*(Z-Z0),X-X0,Y-Y0,Z-Z0,M_PI/15.,Rayon/20.);
V3d::ArrowOfRadius(gIntArrow, X0, Y0, Z0, X0-X, Y0-Y, Z0-Z, M_PI / 15., Rayon / 20.);
TCollection_AsciiString ValOfRadius(Rayon);
PText.SetCoord( 0.5*(X0+X), 0.5*(Y0+Y), 0.5*(Z0+Z) );
gradius->Text(ValOfRadius.ToCString(),PText,0.01);
}
// Display of the meridian
Quantity_Color Col2(Quantity_NOC_GREEN);
Handle(Graphic3d_AspectLine3d) Asp2 = new Graphic3d_AspectLine3d(Col2,Aspect_TOL_SOLID,1.);
gnopick->SetPrimitivesAspect(Asp2);
// Definition of the axis of circle
theView->Up(DXRef,DYRef,DZRef);
this->Position(X,Y,Z);
DXini = X-X0; DYini = Y-Y0; DZini = Z-Z0;
VX = DYRef*DZini - DZRef*DYini;
VY = DZRef*DXini - DXRef*DZini;
VZ = DXRef*DYini - DYRef*DXini;
V3d::CircleInPlane(gnopick,X0,Y0,Z0,VX,VY,VZ,Rayon);
// Display of the parallel
// Definition of the axis of circle
theView->Proj(VX,VY,VZ);
theView->Up(X1,Y1,Z1);
DXRef = VY * Z1 - VZ * Y1;
DYRef = VZ * X1 - VX * Z1;
DZRef = VX * Y1 - VY * X1;
this->Position(X,Y,Z);
DXini = X-X0; DYini = Y-Y0; DZini = Z-Z0;
VX = DYRef*DZini - DZRef*DYini;
VY = DZRef*DXini - DXRef*DZini;
VZ = DXRef*DYini - DYRef*DXini;
V3d::CircleInPlane(gnopick,X0,Y0,Z0,VX,VY,VZ,Rayon);
}
myGraphicStructure->Connect(myGraphicStructure1,Graphic3d_TOC_DESCENDANT);
myTypeOfRepresentation = Pres;
myGraphicStructure->Display();
TheViewer->SetUpdateMode(UpdSov);
}
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