OpenCascade/occt
1
0
Fork 0
mirror of https://git.dev.opencascade.org/repos/occt.git synced 2025-04-03 17:56:21 +03:00
Code Packages Releases Activity
occt/src/OpenGl/OpenGl_View.cxx
dbp e276548b09 0024130: Implementing ray tracing visualization core 
The purpose of this functionality is to bring a basic ray-tracing solution to existing OCCT visualization toolkit (TKOpenGL).
Currently ray-tracing visualization core supports sharp shadows, specular reflections, transparency and adaptive anti-aliasing.
However, the basis for all ray-tracing algorithms is versatile, allowing you to add new ray-tracing features easily (such as ambient occlusion).
All ray-tracing computations are performed on the GPU using OpenCL framework, allowing real-time rendering performance.

It is important to note, that real-time ray-tracing is possible using high-performance GPUs with support of OpenCL 1.1 and higher (such as NVIDIA GeForce 660 or ATI/AMD Radeon 7850).
When using low-end GPUs (such as NVIDIA GeForce 640) the ray-tracing performance may slow down significantly.
Therefore, even with NVIDIA GeForce 640 you can render scenes with the millions of triangles. The support of OpenCL-enabled CPUs and integrated graphics cards is not guaranteed.
2013-10-31 18:02:12 +04:00

722 lines
22 KiB
C++
Raw Blame History

// Created on: 2011-09-20
// Created by: Sergey ZERCHANINOV
// Copyright (c) 2011-2012 OPEN CASCADE SAS
//
// The content of this file is subject to the Open CASCADE Technology Public
// License Version 6.5 (the "License"). You may not use the content of this file
// except in compliance with the License. Please obtain a copy of the License
// at http://www.opencascade.org and read it completely before using this file.
//
// The Initial Developer of the Original Code is Open CASCADE S.A.S., having its
// main offices at: 1, place des Freres Montgolfier, 78280 Guyancourt, France.
//
// The Original Code and all software distributed under the License is
// distributed on an "AS IS" basis, without warranty of any kind, and the
// Initial Developer hereby disclaims all such warranties, including without
// limitation, any warranties of merchantability, fitness for a particular
// purpose or non-infringement. Please see the License for the specific terms
// and conditions governing the rights and limitations under the License.
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <NCollection_Mat4.hxx>
#include <OpenGl_Context.hxx>
#include <OpenGl_Display.hxx>
#include <OpenGl_GlCore11.hxx>
#include <OpenGl_GraduatedTrihedron.hxx>
#include <OpenGl_ShaderManager.hxx>
#include <OpenGl_Texture.hxx>
#include <OpenGl_Trihedron.hxx>
#include <OpenGl_transform_persistence.hxx>
#include <OpenGl_View.hxx>
#include <OpenGl_Workspace.hxx>
#include <Graphic3d_TextureEnv.hxx>
IMPLEMENT_STANDARD_HANDLE(OpenGl_View,MMgt_TShared)
IMPLEMENT_STANDARD_RTTIEXT(OpenGl_View,MMgt_TShared)
/*----------------------------------------------------------------------*/
static const OPENGL_BG_TEXTURE myDefaultBgTexture = { 0, 0, 0, Aspect_FM_CENTERED };
static const OPENGL_BG_GRADIENT myDefaultBgGradient = { {{ 0.F, 0.F, 0.F, 1.F }}, {{ 0.F, 0.F, 0.F, 1.F }}, Aspect_GFM_NONE };
static const Tmatrix3 myDefaultMatrix = { { 1.F, 0.F, 0.F, 0.F }, { 0.F, 1.F, 0.F, 0.F }, { 0.F, 0.F, 1.F, 0.F }, { 0.F, 0.F, 0.F, 1.F } };
static const OPENGL_ZCLIP myDefaultZClip = { { Standard_True, 0.F }, { Standard_True, 1.F } };
static const OPENGL_EXTRA_REP myDefaultExtra =
{
//vrp
{ 0.F, 0.F, 0.F },
//vpn
{ 0.F, 0.F, 1.F },
//vup
{ 0.F, 1.F, 0.F },
//map
{
//window
{ 0.F, 0.F, 1.F, 1.F },
//viewport
{ 0.F, 0.F, 0.F, 1.F, 1.F, 1.F },
//proj
TelParallel,
//prp
{ 0.F, 0.F, 0.F },
//vpd
0.F,
//fpd
0.F,
//bpd
-1.F
},
//scaleFactors
{ 1.F, 1.F, 1.F }
};
static const OPENGL_FOG myDefaultFog = { Standard_False, 0.F, 1.F, { { 0.F, 0.F, 0.F, 1.F } } };
static const TEL_TRANSFORM_PERSISTENCE myDefaultTransPers = { 0, 0.F, 0.F, 0.F };
static const GLdouble THE_IDENTITY_MATRIX[4][4] =
{
{1.0, 0.0, 0.0, 0.0},
{0.0, 1.0, 0.0, 0.0},
{0.0, 0.0, 1.0, 0.0},
{0.0, 0.0, 0.0, 1.0}
};
/*----------------------------------------------------------------------*/
OpenGl_View::OpenGl_View (const CALL_DEF_VIEWCONTEXT &AContext)
: mySurfaceDetail(Visual3d_TOD_NONE),
myBackfacing(0),
myBgTexture(myDefaultBgTexture),
myBgGradient(myDefaultBgGradient),
//myOrientationMatrix(myDefaultMatrix),
//myMappingMatrix(myDefaultMatrix),
//shield_indicator = TOn,
//shield_colour = { { 0.F, 0.F, 0.F, 1.F } },
//border_indicator = TOff,
//border_colour = { { 0.F, 0.F, 0.F, 1.F } },
//active_status = TOn,
myZClip(myDefaultZClip),
myExtra(myDefaultExtra),
myFog(myDefaultFog),
myTrihedron(NULL),
myGraduatedTrihedron(NULL),
myVisualization(AContext.Visualization),
myIntShadingMethod(TEL_SM_GOURAUD),
myAntiAliasing(Standard_False),
myTransPers(&myDefaultTransPers),
myIsTransPers(Standard_False),
myOrientationChanged (Standard_True),
myViewMappingChanged (Standard_True),
myLightSourcesChanged (Standard_True)
{
// Initialize matrices
memcpy(myOrientationMatrix,myDefaultMatrix,sizeof(Tmatrix3));
memcpy(myMappingMatrix,myDefaultMatrix,sizeof(Tmatrix3));
// Shading method
switch (AContext.Model)
{
case 1 : /* VISUAL3D_TOM_INTERP_COLOR */
case 3 : /* VISUAL3D_TOM_VERTEX */
myIntShadingMethod = TEL_SM_GOURAUD;
break;
default :
myIntShadingMethod = TEL_SM_FLAT;
break;
}
#ifdef HAVE_OPENCL
myModificationState = 1; // initial state
#endif
}
/*----------------------------------------------------------------------*/
OpenGl_View::~OpenGl_View ()
{
ReleaseGlResources (NULL); // ensure ReleaseGlResources() was called within valid context
}
void OpenGl_View::ReleaseGlResources (const Handle(OpenGl_Context)& theCtx)
{
OpenGl_Element::Destroy (theCtx, myTrihedron);
OpenGl_Element::Destroy (theCtx, myGraduatedTrihedron);
if (!myTextureEnv.IsNull())
{
theCtx->DelayedRelease (myTextureEnv);
myTextureEnv.Nullify();
}
if (myBgTexture.TexId != 0)
{
glDeleteTextures (1, (GLuint*)&(myBgTexture.TexId));
myBgTexture.TexId = 0;
}
}
void OpenGl_View::SetTextureEnv (const Handle(OpenGl_Context)& theCtx,
const Handle(Graphic3d_TextureEnv)& theTexture)
{
if (!myTextureEnv.IsNull())
{
theCtx->DelayedRelease (myTextureEnv);
myTextureEnv.Nullify();
}
if (theTexture.IsNull())
{
return;
}
myTextureEnv = new OpenGl_Texture (theTexture->GetParams());
Handle(Image_PixMap) anImage = theTexture->GetImage();
if (!anImage.IsNull())
myTextureEnv->Init (theCtx, *anImage.operator->(), theTexture->Type());
#ifdef HAVE_OPENCL
myModificationState++;
#endif
}
void OpenGl_View::SetSurfaceDetail (const Visual3d_TypeOfSurfaceDetail theMode)
{
mySurfaceDetail = theMode;
#ifdef HAVE_OPENCL
myModificationState++;
#endif
}
/*----------------------------------------------------------------------*/
void OpenGl_View::SetBackfacing (const Standard_Integer theMode)
{
myBackfacing = theMode;
}
/*----------------------------------------------------------------------*/
//call_togl_setlight
void OpenGl_View::SetLights (const CALL_DEF_VIEWCONTEXT &AContext)
{
myLights.Clear();
const int nb_lights = AContext.NbActiveLight;
int i = 0;
const CALL_DEF_LIGHT *alight = &(AContext.ActiveLight[0]);
for ( ; i < nb_lights; i++, alight++ )
{
OpenGl_Light rep;
memset(&rep,0,sizeof(rep));
switch( alight->LightType )
{
case 0 : /* TOLS_AMBIENT */
rep.type = TLightAmbient;
rep.col.rgb[0] = alight->Color.r;
rep.col.rgb[1] = alight->Color.g;
rep.col.rgb[2] = alight->Color.b;
break;
case 1 : /* TOLS_DIRECTIONAL */
rep.type = TLightDirectional;
rep.col.rgb[0] = alight->Color.r;
rep.col.rgb[1] = alight->Color.g;
rep.col.rgb[2] = alight->Color.b;
rep.dir[0] = alight->Direction.x;
rep.dir[1] = alight->Direction.y;
rep.dir[2] = alight->Direction.z;
break;
case 2 : /* TOLS_POSITIONAL */
rep.type = TLightPositional;
rep.col.rgb[0] = alight->Color.r;
rep.col.rgb[1] = alight->Color.g;
rep.col.rgb[2] = alight->Color.b;
rep.pos[0] = alight->Position.x;
rep.pos[1] = alight->Position.y;
rep.pos[2] = alight->Position.z;
rep.atten[0] = alight->Attenuation[0];
rep.atten[1] = alight->Attenuation[1];
break;
case 3 : /* TOLS_SPOT */
rep.type = TLightSpot;
rep.col.rgb[0] = alight->Color.r;
rep.col.rgb[1] = alight->Color.g;
rep.col.rgb[2] = alight->Color.b;
rep.pos[0] = alight->Position.x;
rep.pos[1] = alight->Position.y;
rep.pos[2] = alight->Position.z;
rep.dir[0] = alight->Direction.x;
rep.dir[1] = alight->Direction.y;
rep.dir[2] = alight->Direction.z;
rep.shine = alight->Concentration;
rep.atten[0] = alight->Attenuation[0];
rep.atten[1] = alight->Attenuation[1];
rep.angle = alight->Angle;
break;
}
rep.HeadLight = alight->Headlight;
myLights.Append(rep);
}
myLightSourcesChanged = Standard_True;
}
/*----------------------------------------------------------------------*/
//call_togl_setvisualisation
void OpenGl_View::SetVisualisation (const CALL_DEF_VIEWCONTEXT &AContext)
{
myVisualization = AContext.Visualization;
// Shading method
switch (AContext.Model)
{
case 1 : /* VISUAL3D_TOM_INTERP_COLOR */
case 3 : /* VISUAL3D_TOM_VERTEX */
myIntShadingMethod = TEL_SM_GOURAUD;
break;
default :
myIntShadingMethod = TEL_SM_FLAT;
break;
}
}
/*----------------------------------------------------------------------*/
//call_togl_cliplimit
void OpenGl_View::SetClipLimit (const Graphic3d_CView& theCView)
{
myZClip.Back.Limit =
(theCView.Context.ZClipBackPlane - theCView.Mapping.BackPlaneDistance) /
(theCView.Mapping.FrontPlaneDistance - theCView.Mapping.BackPlaneDistance);
myZClip.Front.Limit =
(theCView.Context.ZClipFrontPlane - theCView.Mapping.BackPlaneDistance) /
(theCView.Mapping.FrontPlaneDistance - theCView.Mapping.BackPlaneDistance);
if (myZClip.Back.Limit < 0.0f)
myZClip.Back.Limit = 0.0f;
if (myZClip.Front.Limit > 1.0f)
myZClip.Front.Limit = 1.0f;
if (myZClip.Back.Limit > myZClip.Front.Limit)
{
myZClip.Back.Limit = 0.0f;
myZClip.Front.Limit = 1.0f;
}
myZClip.Back.IsOn = (theCView.Context.BackZClipping != 0);
myZClip.Front.IsOn = (theCView.Context.FrontZClipping != 0);
}
/*----------------------------------------------------------------------*/
//call_togl_viewmapping
void OpenGl_View::SetMapping (const Handle(OpenGl_Display)& theGlDisplay,
const Graphic3d_CView& theCView)
{
const float ratio = theCView.DefWindow.dy / theCView.DefWindow.dx;
const float r_ratio = theCView.DefWindow.dx / theCView.DefWindow.dy;
TEL_VIEW_MAPPING Map;
Map.window.xmin = theCView.Mapping.WindowLimit.um;
Map.window.ymin = theCView.Mapping.WindowLimit.vm;
Map.window.xmax = theCView.Mapping.WindowLimit.uM;
Map.window.ymax = theCView.Mapping.WindowLimit.vM;
Map.viewport.xmin = 0.F;
Map.viewport.xmax = ( 1.F < r_ratio ? 1.F : r_ratio );
Map.viewport.ymin = 0.F;
Map.viewport.ymax = ( 1.F < ratio ? 1.F : ratio );
Map.viewport.zmin = 0.F;
Map.viewport.zmax = 1.F;
// projection type
switch (theCView.Mapping.Projection)
{
case 0 :
Map.proj = TelPerspective;
break;
case 1 :
Map.proj = TelParallel;
break;
}
// projection reference point
Map.prp[0] = theCView.Mapping.ProjectionReferencePoint.x;
Map.prp[1] = theCView.Mapping.ProjectionReferencePoint.y;
Map.prp[2] = theCView.Mapping.ProjectionReferencePoint.z;
if (!theGlDisplay.IsNull() && !theGlDisplay->Walkthrough())
Map.prp[2] += theCView.Mapping.FrontPlaneDistance;
// view plane distance
Map.vpd = theCView.Mapping.ViewPlaneDistance;
// back plane distance
Map.bpd = theCView.Mapping.BackPlaneDistance;
// front plane distance
Map.fpd = theCView.Mapping.FrontPlaneDistance;
Tint err_ind = 0;
// use user-defined matrix
if (theCView.Mapping.IsCustomMatrix)
{
int i, j;
for( i = 0; i < 4; i++ )
for( j = 0; j < 4; j++ )
myMappingMatrix[i][j] = theCView.Mapping.ProjectionMatrix[i][j];
}
else
TelEvalViewMappingMatrix (theGlDisplay, &Map, &err_ind, myMappingMatrix);
if (!err_ind)
myExtra.map = Map;
myViewMappingChanged = Standard_True;
}
/*----------------------------------------------------------------------*/
//call_togl_vieworientation
void OpenGl_View::SetOrientation (const Graphic3d_CView& theCView)
{
Tfloat Vrp[3];
Tfloat Vpn[3];
Tfloat Vup[3];
Tfloat ScaleFactors[3];
Vrp[0] = theCView.Orientation.ViewReferencePoint.x;
Vrp[1] = theCView.Orientation.ViewReferencePoint.y;
Vrp[2] = theCView.Orientation.ViewReferencePoint.z;
Vpn[0] = theCView.Orientation.ViewReferencePlane.x;
Vpn[1] = theCView.Orientation.ViewReferencePlane.y;
Vpn[2] = theCView.Orientation.ViewReferencePlane.z;
Vup[0] = theCView.Orientation.ViewReferenceUp.x;
Vup[1] = theCView.Orientation.ViewReferenceUp.y;
Vup[2] = theCView.Orientation.ViewReferenceUp.z;
ScaleFactors[0] = theCView.Orientation.ViewScaleX;
ScaleFactors[1] = theCView.Orientation.ViewScaleY;
ScaleFactors[2] = theCView.Orientation.ViewScaleZ;
Tint err_ind = 0;
// use user-defined matrix
if (theCView.Orientation.IsCustomMatrix)
{
int i, j;
for( i = 0; i < 4; i++ )
for( j = 0; j < 4; j++ )
myOrientationMatrix[i][j] = theCView.Orientation.ModelViewMatrix[i][j];
}
else
{
TelEvalViewOrientationMatrix (Vrp, Vpn, Vup, ScaleFactors, &err_ind, myOrientationMatrix);
}
if (!err_ind)
{
myExtra.vrp[0] = Vrp[0];
myExtra.vrp[1] = Vrp[1];
myExtra.vrp[2] = Vrp[2];
myExtra.vpn[0] = Vpn[0];
myExtra.vpn[1] = Vpn[1];
myExtra.vpn[2] = Vpn[2];
myExtra.vup[0] = Vup[0];
myExtra.vup[1] = Vup[1];
myExtra.vup[2] = Vup[2];
myExtra.scaleFactors[0] = ScaleFactors[0],
myExtra.scaleFactors[1] = ScaleFactors[1],
myExtra.scaleFactors[2] = ScaleFactors[2];
}
myOrientationChanged = Standard_True;
}
/*----------------------------------------------------------------------*/
void OpenGl_View::SetFog (const Graphic3d_CView& theCView,
const Standard_Boolean theFlag)
{
if (!theFlag)
{
myFog.IsOn = Standard_False;
}
else
{
myFog.IsOn = Standard_True;
myFog.Front =
(theCView.Context.DepthFrontPlane - theCView.Mapping.BackPlaneDistance) /
(theCView.Mapping.FrontPlaneDistance - theCView.Mapping.BackPlaneDistance);
myFog.Back =
(theCView.Context.DepthBackPlane - theCView.Mapping.BackPlaneDistance) /
(theCView.Mapping.FrontPlaneDistance - theCView.Mapping.BackPlaneDistance);
if (myFog.Front < 0.F)
myFog.Front = 0.F;
else if (myFog.Front > 1.F)
myFog.Front = 1.F;
if (myFog.Back < 0.F)
myFog.Back = 0.F;
else if (myFog.Back > 1.F)
myFog.Back = 1.F;
if (myFog.Back > myFog.Front)
{
myFog.Front = 1.F;
myFog.Back = 0.F;
}
myFog.Color.rgb[0] = theCView.DefWindow.Background.r;
myFog.Color.rgb[1] = theCView.DefWindow.Background.g;
myFog.Color.rgb[2] = theCView.DefWindow.Background.b;
myFog.Color.rgb[3] = 1.0f;
}
}
/*----------------------------------------------------------------------*/
void OpenGl_View::TriedronDisplay (const Handle(OpenGl_Context)& theCtx,
const Aspect_TypeOfTriedronPosition thePosition,
const Quantity_NameOfColor theColor,
const Standard_Real theScale,
const Standard_Boolean theAsWireframe)
{
OpenGl_Element::Destroy (theCtx, myTrihedron);
myTrihedron = new OpenGl_Trihedron (thePosition, theColor, theScale, theAsWireframe);
}
/*----------------------------------------------------------------------*/
void OpenGl_View::TriedronErase (const Handle(OpenGl_Context)& theCtx)
{
OpenGl_Element::Destroy (theCtx, myTrihedron);
}
/*----------------------------------------------------------------------*/
void OpenGl_View::GraduatedTrihedronDisplay (const Handle(OpenGl_Context)& theCtx,
const Graphic3d_CGraduatedTrihedron& theData)
{
OpenGl_Element::Destroy (theCtx, myGraduatedTrihedron);
myGraduatedTrihedron = new OpenGl_GraduatedTrihedron (theData);
}
/*----------------------------------------------------------------------*/
void OpenGl_View::GraduatedTrihedronErase (const Handle(OpenGl_Context)& theCtx)
{
OpenGl_Element::Destroy (theCtx, myGraduatedTrihedron);
}
/*----------------------------------------------------------------------*/
//transform_persistence_end
void OpenGl_View::EndTransformPersistence(const Handle(OpenGl_Context)& theCtx)
{
if (myIsTransPers)
{
// restore matrix
glMatrixMode (GL_PROJECTION);
glPopMatrix();
glMatrixMode (GL_MODELVIEW);
glPopMatrix();
myIsTransPers = Standard_False;
// Note: the approach of accessing OpenGl matrices is used now since the matrix
// manipulation are made with help of OpenGl methods. This might be replaced by
// direct computation of matrices by OCC subroutines.
Tmatrix3 aResultWorldView;
glGetFloatv (GL_MODELVIEW_MATRIX, *aResultWorldView);
Tmatrix3 aResultProjection;
glGetFloatv (GL_PROJECTION_MATRIX, *aResultProjection);
// Set OCCT state uniform variables
theCtx->ShaderManager()->RevertWorldViewStateTo (aResultWorldView);
theCtx->ShaderManager()->RevertProjectionStateTo (aResultProjection);
}
}
/*----------------------------------------------------------------------*/
//transform_persistence_begin
const TEL_TRANSFORM_PERSISTENCE* OpenGl_View::BeginTransformPersistence (const Handle(OpenGl_Context)& theCtx,
const TEL_TRANSFORM_PERSISTENCE* theTransPers)
{
const TEL_TRANSFORM_PERSISTENCE* aTransPersPrev = myTransPers;
myTransPers = theTransPers;
if (theTransPers->mode == 0)
{
EndTransformPersistence (theCtx);
return aTransPersPrev;
}
GLint aViewport[4];
GLdouble aModelMatrix[4][4];
GLdouble aProjMatrix[4][4];
glGetIntegerv (GL_VIEWPORT, aViewport);
glGetDoublev (GL_MODELVIEW_MATRIX, (GLdouble* )aModelMatrix);
glGetDoublev (GL_PROJECTION_MATRIX, (GLdouble *)aProjMatrix);
const GLdouble aViewportW = (GLdouble )aViewport[2];
const GLdouble aViewportH = (GLdouble )aViewport[3];
if (myIsTransPers)
{
// pop matrix stack - it will be overridden later
glMatrixMode (GL_PROJECTION);
glPopMatrix();
glMatrixMode (GL_MODELVIEW);
glPopMatrix();
}
else
{
myIsTransPers = Standard_True;
}
// push matrices into stack and reset them
glMatrixMode (GL_MODELVIEW);
glPushMatrix();
glLoadIdentity();
glMatrixMode (GL_PROJECTION);
glPushMatrix();
glLoadIdentity();
// get the window's (fixed) coordinates for theTransPers->point before matrixes modifications
GLdouble aWinX = 0.0, aWinY = 0.0, aWinZ = 0.0;
if ((theTransPers->mode & TPF_PAN) != TPF_PAN)
{
gluProject (theTransPers->pointX, theTransPers->pointY, theTransPers->pointZ,
(GLdouble* )aModelMatrix, (GLdouble* )aProjMatrix, aViewport,
&aWinX, &aWinY, &aWinZ);
}
// prevent zooming
if ((theTransPers->mode & TPF_ZOOM)
|| (theTransPers->mode == TPF_TRIEDRON))
{
// compute fixed-zoom multiplier
// actually function works ugly with TelPerspective!
const GLdouble aDet2 = 0.002 / (aViewportW > aViewportH ? aProjMatrix[1][1] : aProjMatrix[0][0]);
aProjMatrix[0][0] *= aDet2;
aProjMatrix[1][1] *= aDet2;
aProjMatrix[2][2] *= aDet2;
}
// prevent translation - annulate translate matrix
if ((theTransPers->mode & TPF_PAN)
|| (theTransPers->mode == TPF_TRIEDRON))
{
aModelMatrix[3][0] = 0.0;
aModelMatrix[3][1] = 0.0;
aModelMatrix[3][2] = 0.0;
aProjMatrix [3][0] = 0.0;
aProjMatrix [3][1] = 0.0;
aProjMatrix [3][2] = 0.0;
}
// prevent scaling-on-axis
if (theTransPers->mode & TPF_ZOOM)
{
const double aScaleX = myExtra.scaleFactors[0];
const double aScaleY = myExtra.scaleFactors[1];
const double aScaleZ = myExtra.scaleFactors[2];
for (int i = 0; i < 3; ++i)
{
aModelMatrix[0][i] /= aScaleX;
aModelMatrix[1][i] /= aScaleY;
aModelMatrix[2][i] /= aScaleZ;
}
}
// prevent rotating - annulate rotate matrix
if (theTransPers->mode & TPF_ROTATE)
{
aModelMatrix[0][0] = 1.0;
aModelMatrix[1][1] = 1.0;
aModelMatrix[2][2] = 1.0;
aModelMatrix[1][0] = 0.0;
aModelMatrix[2][0] = 0.0;
aModelMatrix[0][1] = 0.0;
aModelMatrix[2][1] = 0.0;
aModelMatrix[0][2] = 0.0;
aModelMatrix[1][2] = 0.0;
}
// load computed matrices
glMatrixMode (GL_MODELVIEW);
glMultMatrixd ((GLdouble* )aModelMatrix);
glMatrixMode (GL_PROJECTION);
glMultMatrixd ((GLdouble* )aProjMatrix);
if (theTransPers->mode == TPF_TRIEDRON)
{
// move to the window corner
if (theTransPers->pointX != 0.0
&& theTransPers->pointY != 0.0)
{
GLdouble aW1, aH1, aW2, aH2, aDummy;
glMatrixMode (GL_PROJECTION);
gluUnProject ( 0.5 * aViewportW, 0.5 * aViewportH, 0.0,
(GLdouble* )THE_IDENTITY_MATRIX, (GLdouble* )aProjMatrix, aViewport,
&aW1, &aH1, &aDummy);
gluUnProject (-0.5 * aViewportW, -0.5 * aViewportH, 0.0,
(GLdouble* )THE_IDENTITY_MATRIX, (GLdouble* )aProjMatrix, aViewport,
&aW2, &aH2, &aDummy);
GLdouble aMoveX = 0.5 * (aW1 - aW2 - theTransPers->pointZ);
GLdouble aMoveY = 0.5 * (aH1 - aH2 - theTransPers->pointZ);
aMoveX = (theTransPers->pointX > 0.0) ? aMoveX : -aMoveX;
aMoveY = (theTransPers->pointY > 0.0) ? aMoveY : -aMoveY;
glTranslated (aMoveX, aMoveY, 0.0);
}
}
else if ((theTransPers->mode & TPF_PAN) != TPF_PAN)
{
// move to thePoint using saved win-coordinates ('marker-behaviour')
GLdouble aMoveX, aMoveY, aMoveZ;
glGetDoublev (GL_MODELVIEW_MATRIX, (GLdouble* )aModelMatrix);
glGetDoublev (GL_PROJECTION_MATRIX, (GLdouble* )aProjMatrix);
gluUnProject (aWinX, aWinY, aWinZ,
(GLdouble* )aModelMatrix, (GLdouble* )aProjMatrix, aViewport,
&aMoveX, &aMoveY, &aMoveZ);
glMatrixMode (GL_MODELVIEW);
glTranslated (aMoveX, aMoveY, aMoveZ);
}
// Note: the approach of accessing OpenGl matrices is used now since the matrix
// manipulation are made with help of OpenGl methods. This might be replaced by
// direct computation of matrices by OCC subroutines.
Tmatrix3 aResultWorldView;
glGetFloatv (GL_MODELVIEW_MATRIX, *aResultWorldView);
Tmatrix3 aResultProjection;
glGetFloatv (GL_PROJECTION_MATRIX, *aResultProjection);
// Set OCCT state uniform variables
theCtx->ShaderManager()->UpdateWorldViewStateTo (aResultWorldView);
theCtx->ShaderManager()->UpdateProjectionStateTo (aResultProjection);
return aTransPersPrev;
}
View Git Blame Copy Permalink