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Added new osgcallback demo, and updated small API changes to improve the

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flexiblity of callbacks.

Added beginings of convex planer occlusions culling.
This commit is contained in:
Robert Osfield 2002-05-28 23:43:22 +00:00
parent a5a267d305
commit ae5e4f848f
22 changed files with 658 additions and 33 deletions
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1
Make/makedirdefs
View File

@ -66,6 +66,7 @@ PLUGIN_DIRS += tiff
DEMOS_DIRS = \
hangglide\
osgbillboard\
osgcallback\
osgclip\
osgcluster\
osgconv\

95
VisualStudio/Demos/osgcallback/osgcallback.dsp Executable file
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@ -0,0 +1,95 @@
# Microsoft Developer Studio Project File - Name="Demo osgcallback" - Package Owner=<4>
# Microsoft Developer Studio Generated Build File, Format Version 6.00
# ** DO NOT EDIT **
# TARGTYPE "Win32 (x86) Console Application" 0x0103
CFG=Demo osgcallback - Win32 Release
!MESSAGE This is not a valid makefile. To build this project using NMAKE,
!MESSAGE use the Export Makefile command and run
!MESSAGE
!MESSAGE NMAKE /f "osgcallback.mak".
!MESSAGE
!MESSAGE You can specify a configuration when running NMAKE
!MESSAGE by defining the macro CFG on the command line. For example:
!MESSAGE
!MESSAGE NMAKE /f "osgcallback.mak" CFG="Demo osgcallback - Win32 Release"
!MESSAGE
!MESSAGE Possible choices for configuration are:
!MESSAGE
!MESSAGE "Demo osgcallback - Win32 Release" (based on "Win32 (x86) Console Application")
!MESSAGE "Demo osgcallback - Win32 Debug" (based on "Win32 (x86) Console Application")
!MESSAGE
# Begin Project
# PROP AllowPerConfigDependencies 0
# PROP Scc_ProjName ""
# PROP Scc_LocalPath ""
CPP=cl.exe
RSC=rc.exe
!IF "$(CFG)" == "Demo osgcallback - Win32 Release"
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# PROP BASE Use_Debug_Libraries 0
# PROP BASE Output_Dir "Release"
# PROP BASE Intermediate_Dir "Release"
# PROP BASE Target_Dir ""
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# ADD BASE CPP /nologo /W3 /GX /O2 /D "WIN32" /D "NDEBUG" /D "_CONSOLE" /D "_MBCS" /YX /FD /c
# ADD CPP /nologo /MD /W3 /GR /GX /O2 /I "../../../include" /D "WIN32" /D "NDEBUG" /D "_CONSOLE" /D "_MBCS" /YX /FD /c
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BSC32=bscmake.exe
# ADD BASE BSC32 /nologo
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LINK32=link.exe
# ADD BASE LINK32 kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib /nologo /subsystem:console /machine:I386
# ADD LINK32 /nologo /subsystem:console /pdb:none /machine:I386 /out:"../../../bin/osgcallback.exe" /libpath:"../../../lib"
!ELSEIF "$(CFG)" == "Demo osgcallback - Win32 Debug"
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# PROP BASE Target_Dir ""
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# PROP Output_Dir "Debug"
# PROP Intermediate_Dir "Debug"
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# PROP Target_Dir ""
# ADD BASE CPP /nologo /W3 /Gm /GX /Zi /Od /D "WIN32" /D "_DEBUG" /D "_CONSOLE" /D "_MBCS" /YX /FD /c
# ADD CPP /nologo /MDd /W3 /Gm /vd0 /GR /GX /Zi /Od /I "../../../include" /D "_CONSOLE" /D "_MBCS" /D "FL_DLL" /D "WIN32" /D "_DEBUG" /FR /YX /FD /c
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# ADD RSC /l 0x809 /d "_DEBUG"
BSC32=bscmake.exe
# ADD BASE BSC32 /nologo
# ADD BSC32 /nologo
LINK32=link.exe
# ADD BASE LINK32 kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib /nologo /subsystem:console /debug /machine:I386 /pdbtype:sept
# ADD LINK32 glut32.lib glu32.lib opengl32.lib /nologo /subsystem:console /debug /machine:I386 /nodefaultlib:"libcmt" /out:"../../../bin/osgcallbackd.exe" /pdbtype:sept /libpath:"../../../lib"
# SUBTRACT LINK32 /incremental:no
!ENDIF
# Begin Target
# Name "Demo osgcallback - Win32 Release"
# Name "Demo osgcallback - Win32 Debug"
# Begin Source File
SOURCE=..\..\..\src\Demos\osgcallback\osgcallback.cpp
# End Source File
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# Begin Group "Resource Files"
# PROP Default_Filter "ico;cur;bmp;dlg;rc2;rct;bin;rgs;gif;jpg;jpeg;jpe"
# End Group
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26
VisualStudio/VisualStudio.dsw
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@ -180,6 +180,32 @@ Package=<4>
###############################################################################
Project: "Demo osgcallback"=".\Demos\osgcallback\osgcallback.dsp" - Package Owner=<4>
Package=<5>
{{{
}}}
Package=<4>
{{{
Begin Project Dependency
Project_Dep_Name Core osg
End Project Dependency
Begin Project Dependency
Project_Dep_Name Core osgDB
End Project Dependency
Begin Project Dependency
Project_Dep_Name Core osgGA
End Project Dependency
Begin Project Dependency
Project_Dep_Name Core osgGLUT
End Project Dependency
Begin Project Dependency
Project_Dep_Name Core osgUtil
End Project Dependency
}}}
###############################################################################
Project: "Demo osgcopy"=".\Demos\osgcopy\osgcopy.dsp" - Package Owner=<4>
Package=<5>

24
VisualStudio/osg/osg.dsp
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@ -133,6 +133,14 @@ SOURCE=..\..\src\osg\ColorMatrix.cpp
# End Source File
# Begin Source File
SOURCE=..\..\src\osg\ConvexPlanerOccluder.cpp
# End Source File
# Begin Source File
SOURCE=..\..\src\osg\ConvexPlanerPolygon.cpp
# End Source File
# Begin Source File
SOURCE=..\..\src\osg\CopyOp.cpp
# End Source File
# Begin Source File
@ -293,6 +301,10 @@ SOURCE=..\..\src\osg\ShadeModel.cpp
# End Source File
# Begin Source File
SOURCE=..\..\src\osg\ShadowOccluderVolume.cpp
# End Source File
# Begin Source File
SOURCE=..\..\src\osg\State.cpp
# End Source File
# Begin Source File
@ -393,6 +405,14 @@ SOURCE=..\..\Include\Osg\ClipPlane
# End Source File
# Begin Source File
SOURCE=..\..\Include\Osg\ConvexPlanerOccluder
# End Source File
# Begin Source File
SOURCE=..\..\Include\Osg\ConvexPlanerPolygon
# End Source File
# Begin Source File
SOURCE=..\..\Include\Osg\ColorMask
# End Source File
# Begin Source File
@ -597,6 +617,10 @@ SOURCE=..\..\Include\Osg\ShadeModel
# End Source File
# Begin Source File
SOURCE=..\..\Include\Osg\ShadowOccluderVolume
# End Source File
# Begin Source File
SOURCE=..\..\Include\Osg\State
# End Source File
# Begin Source File

8
include/osg/Billboard
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@ -83,11 +83,9 @@ class SG_EXPORT Billboard : public Geode
struct ComputeBillboardCallback : public osg::Referenced
{
/** Get the transformation matrix which moves from local coords to world coords.*/
virtual const bool computeMatrix(const Matrix& modelview, const Billboard* billboard, const Vec3& eye_local, const Vec3& pos_local) const;
virtual const bool computeMatrix(Matrix& modelview, const Billboard* billboard, const Vec3& eye_local, const Vec3& pos_local) const = 0;
};
friend struct osg::Billboard::ComputeBillboardCallback;
/** Set the ComputeBillboardCallback which allows users to attach custom computation of the local transformation as
* seen by cull traversers and alike.*/
void setComputeBillboardCallback(ComputeBillboardCallback* ctc) { _computeBillboardCallback=ctc; }
@ -107,14 +105,14 @@ class SG_EXPORT Billboard : public Geode
return computeMatrix(modelview,eye_local,pos_local);
}
virtual const bool computeMatrix(Matrix& modelview, const Vec3& eye_local, const Vec3& pos_local) const;
protected:
virtual ~Billboard();
virtual const bool computeBound() const;
virtual const bool computeMatrix(Matrix& modelview, const Vec3& eye_local, const Vec3& pos_local) const;
enum AxisAligned
{
AXIAL_ROT_X_AXIS=AXIAL_ROT+1,

61
include/osg/ConvexPlanerOccluder Normal file
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@ -0,0 +1,61 @@
//C++ header - Open Scene Graph - Copyright (C) 1998-2001 Robert Osfield
//Distributed under the terms of the GNU Library General Public License (LGPL)
//as published by the Free Software Foundation.
#ifndef OSG_CONVEXPLANEROCCLUDER
#define OSG_CONVEXPLANEROCCLUDER 1
#include <osg/ConvexPlanerPolygon>
#include <osg/Referenced>
namespace osg {
class OccluderVolume;
/** A ClippingVolume class for representing convex clipping volumes made up.
* When adding planes, their normals should point inwards (into the volume) */
class SG_EXPORT ConvexPlanerOccluder : public Referenced
{
public:
inline ConvexPlanerOccluder() {}
void setOccluder(const ConvexPlanerPolygon& cpp) { _occluder = cpp; }
ConvexPlanerPolygon& getOccluder() { return _occluder; }
const ConvexPlanerPolygon& getOccluder() const { return _occluder; }
typedef std::vector<ConvexPlanerPolygon> HoleList;
void addHole(const ConvexPlanerPolygon& cpp) { _holeList.push_back(cpp); }
HoleList& getHoleList() { return _holeList; }
const HoleList& getHoleList() const { return _holeList; }
void computeAttributes();
void computeBound(BoundingBox& bb) const;
void computeBound(BoundingSphere& bs) const;
protected:
float _area;
Vec3 _center;
Vec3 _normal;
ConvexPlanerPolygon _occluder;
HoleList _holeList;
};
} // end of namespace
#endif

57
include/osg/ConvexPlanerPolygon Normal file
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@ -0,0 +1,57 @@
//C++ header - Open Scene Graph - Copyright (C) 1998-2001 Robert Osfield
//Distributed under the terms of the GNU Library General Public License (LGPL)
//as published by the Free Software Foundation.
#ifndef OSG_CONVEXPLANERPOLYGON
#define OSG_CONVEXPLANERPOLYGON 1
#include <osg/Plane>
#include <vector>
namespace osg {
class BoundingBox;
class BoundingSphere;
/** A ClippingVolume class for representing convex clipping volumes made up.
* When adding planes, their normals should point inwards (into the volume) */
class SG_EXPORT ConvexPlanerPolygon
{
public:
inline ConvexPlanerPolygon() {}
float area() { return _area; }
const Vec3& center() { return _center; }
const Vec3& normal() { return _normal; }
typedef std::vector<osg::Vec3> VertexList;
void add(const Vec3& v) { _vertexList.push_back(v); }
VertexList& getVertexList() { return _vertexList; }
const VertexList& getVertexList() const { return _vertexList; }
void computeAttributes();
void computeBound(BoundingBox& bb) const;
void computeBound(BoundingSphere& bs) const;
protected:
float _area;
Vec3 _center;
Vec3 _normal;
VertexList _vertexList;
};
} // end of namespace
#endif

6
include/osg/Drawable
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@ -172,8 +172,6 @@ class SG_EXPORT Drawable : public Object
virtual void drawImmediateMode(State& state,osg::Drawable* drawable) const = 0;
};
friend struct osg::Drawable::DrawCallback;
/** Set the DrawCallback which allows users to attach customize the drawing of existing Drawable object.*/
void setDrawCallback(DrawCallback* dc) { _drawCallback=dc; dirtyDisplayList(); }
@ -186,11 +184,9 @@ class SG_EXPORT Drawable : public Object
struct CullCallback : public osg::Referenced
{
/** do customized cull code.*/
virtual bool cull(osg::NodeVisitor *visitor, osg::Drawable* drawable) = 0;
virtual bool cull(osg::NodeVisitor *visitor, osg::Drawable* drawable) const = 0;
};
friend struct osg::Drawable::CullCallback;
/** Set the CullCallback which allows users to attach customize the drawing of existing Drawable object.*/
void setCullCallback(CullCallback* cc) { _cullCallback=cc; }

13
include/osg/Geode
View File

@ -8,6 +8,7 @@
#include <osg/Node>
#include <osg/NodeVisitor>
#include <osg/Drawable>
#include <osg/ConvexPlanerOccluder>
namespace osg {
@ -108,6 +109,17 @@ class SG_EXPORT Geode : public Node
/** compile OpenGL Display List for each geoset.*/
void compileDrawables(State& state);
/** Attach a ConvexPlanerOccluder to a Geode.*/
void setOccluder(ConvexPlanerOccluder* occluder) { _occluder = occluder; }
/** Get the ConvexPlanerOccluder* attached to a Geode. */
ConvexPlanerOccluder* getOccluder() { return _occluder.get(); }
/** Get the const ConvexPlanerOccluder* attached to a Geode.*/
const ConvexPlanerOccluder* getOccluder() const { return _occluder.get(); }
protected:
virtual ~Geode();
@ -115,6 +127,7 @@ class SG_EXPORT Geode : public Node
virtual const bool computeBound() const;
DrawableList _drawables;
ref_ptr<ConvexPlanerOccluder> _occluder;
};

9
include/osg/LOD
View File

@ -60,11 +60,9 @@ class SG_EXPORT LOD : public Group
struct EvaluateLODCallback : public osg::Referenced
{
/** Compute the child to select.*/
virtual const int evaluateLODChild(const osg::LOD* lod, const Vec3& eye_local, const float bias) const;
virtual const int evaluateLODChild(const osg::LOD* lod, const Vec3& eye_local, const float bias) const = 0;
};
friend struct osg::LOD::EvaluateLODCallback;
/** Set the EvaluateLODCallback which allows users to attach customize computation of the the selection of LOD children.*/
void setEvaluateLODCallback(EvaluateLODCallback* cbc) { _evaluateLODCallback=cbc; }
@ -74,8 +72,6 @@ class SG_EXPORT LOD : public Group
/** Get the const ComputeBillboardCallback.*/
const EvaluateLODCallback* getEvaluateLODCallback() const { return _evaluateLODCallback.get(); }
/** return the child to traverse.
Selected by the distance between the eye point in local
coordinates and the LOD center, multiplied by the bias.*/
@ -88,10 +84,11 @@ class SG_EXPORT LOD : public Group
}
virtual const int evaluateLODChild(const Vec3& eye_local,const float bias) const;
protected :
virtual ~LOD() {}
virtual const int evaluateLODChild(const Vec3& eye_local,const float bias) const;
typedef std::vector<float> RangeList;
RangeList _rangeList;

6
include/osg/PositionAttitudeTransform
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@ -36,13 +36,13 @@ class SG_EXPORT PositionAttitudeTransform : public Transform
const Quat& getAttitude() const { return _attitude; }
protected :
virtual const bool computeLocalToWorldMatrix(Matrix& matrix,NodeVisitor* nv) const;
virtual const bool computeWorldToLocalMatrix(Matrix& matrix,NodeVisitor* nv) const;
protected :
Vec3 _position;
Quat _attitude;

56
include/osg/ShadowOccluderVolume Normal file
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@ -0,0 +1,56 @@
//C++ header - Open Scene Graph - Copyright (C) 1998-2001 Robert Osfield
//Distributed under the terms of the GNU Library General Public License (LGPL)
//as published by the Free Software Foundation.
#ifndef OSG_SHADOWOCCLUDERVOLUME
#define OSG_SHADOWOCCLUDERVOLUME 1
#include <osg/ref_ptr>
#include <osg/ClippingVolume>
#include <osg/ConvexPlanerOccluder>
namespace osg {
/** ShadowOccluderVolume is a helper class for implementating shadow occlusion culling. */
class SG_EXPORT ShadowOccluderVolume : public Referenced
{
public:
ShadowOccluderVolume(const ShadowOccluderVolume& soc,Matrix& MVP);
ShadowOccluderVolume(const ConvexPlanerOccluder& occluder,Matrix& MVP);
typedef std::vector<ClippingVolume> ClippingHoleList;
/** Convert shadow occluder into local coords by multiplying the
* clip space occluder by the ModelViewProjectionMatrix.*/
void set(const ShadowOccluderVolume& soc,Matrix& MVP);
/** Initialize a ShadowOccluderVolume to a ConvexPlanerOccluder
* transformed into clipspace.*/
void set(const ConvexPlanerOccluder& occluder,Matrix& MVP);
/** return true if the specified bounding sphere is contaned entirely
* within this shadow occluder volume.*/
bool contains(const BoundingSphere& bs);
/** return true if the specified bounding box is contained entirely
* within this shadow occluder volume.*/
bool contains(const BoundingBox& bs);
protected:
// the original shadow occluder computed in clip space
ref_ptr<ShadowOccluderVolume> _clipSpaceOccluder;
ClippingVolume _occluderVolume;
ClippingHoleList _clippingHoleList;
};
} // end of namespace
#endif

22
include/osg/Transform
View File

@ -70,8 +70,6 @@ class SG_EXPORT Transform : public Group
virtual const bool computeWorldToLocalMatrix(Matrix& matrix,const Transform* transform, NodeVisitor* nv) const = 0;
};
friend struct osg::Transform::ComputeTransformCallback;
/** Set the ComputerTransfromCallback which allows users to attach custom computation of the local transformation as
* seen by cull traversers and alike.*/
void setComputeTransformCallback(ComputeTransformCallback* ctc) { _computeTransformCallback=ctc; dirtyBound(); }
@ -118,16 +116,6 @@ class SG_EXPORT Transform : public Group
/** postMult transform.*/
void postMult(const Matrix& mat) { _matrix->postMult(mat); _inverseDirty=true; computeInverse(); dirtyBound(); }
protected :
virtual ~Transform();
/** Override's Group's computeBound.
* There is no need to override in subclasses from osg::Transform since this computeBound() uses
* the underlying matrix (calling computeMatrix if required.) */
virtual const bool computeBound() const;
virtual const bool computeLocalToWorldMatrix(Matrix& matrix,NodeVisitor*) const
{
if (_referenceFrame==RELATIVE_TO_PARENTS)
@ -154,6 +142,16 @@ class SG_EXPORT Transform : public Group
return true;
}
protected :
virtual ~Transform();
/** Override's Group's computeBound.
* There is no need to override in subclasses from osg::Transform since this computeBound() uses
* the underlying matrix (calling computeMatrix if required.) */
virtual const bool computeBound() const;
inline void computeInverse() const
{
if (_inverseDirty)

16
src/Demos/osgcallback/Makefile Normal file
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@ -0,0 +1,16 @@
TOPDIR = ../../..
include $(TOPDIR)/Make/makedefs
CXXFILES =\
osgcallback.cpp\
LIBS += $(OSG_LIBS) $(GLUT_LIB) $(GL_LIBS) $(X_LIBS) $(OTHER_LIBS)
INSTFILES = \
$(CXXFILES)\
Makefile.inst=Makefile
EXEC = osgcallback
include $(TOPDIR)/Make/makerules

12
src/Demos/osgcallback/Makefile.inst Normal file
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@ -0,0 +1,12 @@
TOPDIR = ../..
include $(TOPDIR)/Make/makedefs
CXXFILES =\
osgcallback.cpp\
LIBS += $(OSG_LIBS) $(GLUT_LIB) $(GL_LIBS) $(X_LIBS) $(OTHER_LIBS)
EXEC = osgcallback
include $(TOPDIR)/Make/makerules

251
src/Demos/osgcallback/osgcallback.cpp Normal file
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@ -0,0 +1,251 @@
#include <osg/GL>
#include <osgGLUT/glut>
#include <osgGLUT/Viewer>
#include <osg/Transform>
#include <osg/Billboard>
#include <osg/Geode>
#include <osg/Group>
#include <osg/LOD>
#include <osg/Notify>
#include <osgDB/Registry>
#include <osgDB/ReadFile>
#include <osgUtil/TrackballManipulator>
#include <osgUtil/FlightManipulator>
#include <osgUtil/DriveManipulator>
#include <osgUtil/Optimizer>
void write_usage(std::ostream& out,const std::string& name)
{
out << std::endl;
out <<"usage:"<< std::endl;
out <<" "<<name<<" [options] infile1 [infile2 ...]"<< std::endl;
out << std::endl;
out <<"options:"<< std::endl;
out <<" -l libraryName - load plugin of name libraryName"<< std::endl;
out <<" i.e. -l osgdb_pfb"<< std::endl;
out <<" Useful for loading reader/writers which can load"<< std::endl;
out <<" other file formats in addition to its extension."<< std::endl;
out <<" -e extensionName - load reader/wrter plugin for file extension"<< std::endl;
out <<" i.e. -e pfb"<< std::endl;
out <<" Useful short hand for specifying full library name as"<< std::endl;
out <<" done with -l above, as it automatically expands to"<< std::endl;
out <<" the full library name appropriate for each platform."<< std::endl;
out <<std::endl;
out <<" -stereo - switch on stereo rendering, using the default of,"<< std::endl;
out <<" ANAGLYPHIC or the value set in the OSG_STEREO_MODE "<< std::endl;
out <<" environmental variable. See doc/stereo.html for "<< std::endl;
out <<" further details on setting up accurate stereo "<< std::endl;
out <<" for your system. "<< std::endl;
out <<" -stereo ANAGLYPHIC - switch on anaglyphic(red/cyan) stereo rendering."<< std::endl;
out <<" -stereo QUAD_BUFFER - switch on quad buffered stereo rendering."<< std::endl;
out <<std::endl;
out <<" -stencil - use a visual with stencil buffer enabled, this "<< std::endl;
out <<" also allows the depth complexity statistics mode"<< std::endl;
out <<" to be used (press 'p' three times to cycle to it)."<< std::endl;
out << std::endl;
}
class AppCallback : public osg::NodeCallback
{
virtual void operator()(osg::Node* node, osg::NodeVisitor* nv)
{
std::cout<<"app callback - pre traverse"<<node<<std::endl;
traverse(node,nv);
std::cout<<"app callback - post traverse"<<node<<std::endl;
}
};
class CullCallback : public osg::NodeCallback
{
virtual void operator()(osg::Node* node, osg::NodeVisitor* nv)
{
std::cout<<"cull callback - pre traverse"<<node<<std::endl;
traverse(node,nv);
std::cout<<"cull callback - post traverse"<<node<<std::endl;
}
};
class DrawableCallback : public osg::Drawable::DrawCallback
{
virtual void drawImmediateMode(osg::State& state,osg::Drawable* drawable) const
{
std::cout<<"draw call back - pre drawImmediateMode"<<drawable<<std::endl;
drawable->drawImmediateMode(state);
std::cout<<"draw call back - post drawImmediateMode"<<drawable<<std::endl;
}
};
struct LODCallback : public osg::LOD::EvaluateLODCallback
{
/** Compute the child to select.*/
virtual const int evaluateLODChild(const osg::LOD* lod, const osg::Vec3& eye_local, const float bias) const
{
std::cout<<"evaluateLODChild callback - pre lod->evaluateLODChild"<<std::endl;
int result = lod->evaluateLODChild(eye_local,bias);
std::cout<<"evaluateLODChild callback - post lod->evaluateLODChild"<<std::endl;
return result;
}
};
struct TransformCallback : public osg::Transform::ComputeTransformCallback
{
/** Get the transformation matrix which moves from local coords to world coords.*/
virtual const bool computeLocalToWorldMatrix(osg::Matrix& matrix,const osg::Transform* transform, osg::NodeVisitor* nv) const
{
std::cout<<"computeLocalToWorldMatrix - pre transform->computeLocalToWorldMatrix"<<std::endl;
bool result = transform->computeLocalToWorldMatrix(matrix,nv);
std::cout<<"computeLocalToWorldMatrix - post transform->computeLocalToWorldMatrix"<<std::endl;
return result;
}
/** Get the transformation matrix which moves from world coords to local coords.*/
virtual const bool computeWorldToLocalMatrix(osg::Matrix& matrix,const osg::Transform* transform, osg::NodeVisitor* nv) const
{
std::cout<<"computeWorldToLocalMatrix - pre transform->computeWorldToLocalMatrix"<<std::endl;
bool result = transform->computeWorldToLocalMatrix(matrix,nv);
std::cout<<"computeWorldToLocalMatrix - post transform->computeWorldToLocalMatrix"<<std::endl;
return result;
}
};
struct BillboardCallback : public osg::Billboard::ComputeBillboardCallback
{
/** Get the transformation matrix which moves from local coords to world coords.*/
virtual const bool computeMatrix(osg::Matrix& modelview, const osg::Billboard* billboard, const osg::Vec3& eye_local, const osg::Vec3& pos_local) const
{
std::cout<<"ComputeBillboardCallback - pre billboard->computeMatrix"<<std::endl;
bool result = billboard->computeMatrix(modelview,eye_local,pos_local);
std::cout<<"ComputeBillboardCallback - post billboard->computeMatrix"<<std::endl;
return result;
}
};
struct DrawableCullCallback : public osg::Drawable::CullCallback
{
/** do customized cull code.*/
virtual bool cull(osg::NodeVisitor*, osg::Drawable* drawable) const
{
std::cout<<"Drawable cull callback "<<drawable<<std::endl;
return false;
}
};
class InsertCallbacksVisitor : public osg::NodeVisitor
{
public:
InsertCallbacksVisitor():NodeVisitor(osg::NodeVisitor::TRAVERSE_ALL_CHILDREN)
{
}
virtual void apply(osg::Node& node)
{
node.setAppCallback(new AppCallback());
node.setCullCallback(new CullCallback());
traverse(node);
}
virtual void apply(osg::Geode& geode)
{
geode.setAppCallback(new AppCallback());
//note, it makes no sense to attach a cull callback to the node
//at there are no nodes to traverse below the geode, only
//drawables, and as such the Cull node callbacks is ignored.
//If you wish to control the culling of drawables
//then use a drawable cullback...
for(int i=0;i<geode.getNumDrawables();++i)
{
geode.getDrawable(i)->setCullCallback(new DrawableCullCallback());
geode.getDrawable(i)->setDrawCallback(new DrawableCallback());
}
}
virtual void apply(osg::Billboard& node)
{
node.setComputeBillboardCallback(new BillboardCallback());
apply((osg::Geode&)node);
}
virtual void apply(osg::Transform& node)
{
node.setComputeTransformCallback(new TransformCallback());
apply((osg::Node&)node);
}
virtual void apply(osg::LOD& node)
{
node.setEvaluateLODCallback(new LODCallback());
apply((osg::Node&)node);
}
};
int main( int argc, char **argv )
{
// initialize the GLUT
glutInit( &argc, argv );
if (argc<2)
{
write_usage(std::cout,argv[0]);
return 0;
}
// create the commandline args.
std::vector<std::string> commandLine;
for(int i=1;i<argc;++i) commandLine.push_back(argv[i]);
// initialize the viewer.
osgGLUT::Viewer viewer;
viewer.setWindowTitle(argv[0]);
// configure the viewer from the commandline arguments, and eat any
// parameters that have been matched.
viewer.readCommandLine(commandLine);
// configure the plugin registry from the commandline arguments, and
// eat any parameters that have been matched.
osgDB::readCommandLine(commandLine);
// load the nodes from the commandline arguments.
osg::Node* rootnode = osgDB::readNodeFiles(commandLine);
if (!rootnode)
{
// write_usage(osg::notify(osg::NOTICE),argv[0]);
return 1;
}
// run optimization over the scene graph
osgUtil::Optimizer optimzer;
optimzer.optimize(rootnode);
// insert all the callbacks
InsertCallbacksVisitor icv;
rootnode->accept(icv);
// add a viewport to the viewer and attach the scene graph.
viewer.addViewport( rootnode );
// register trackball, flight and drive.
viewer.registerCameraManipulator(new osgUtil::TrackballManipulator);
viewer.registerCameraManipulator(new osgUtil::FlightManipulator);
viewer.registerCameraManipulator(new osgUtil::DriveManipulator);
// open the viewer window.
viewer.open();
// fire up the event loop.
viewer.run();
return 0;
}

3
src/osg/ConvexPlanerOccluder.cpp Normal file
View File

@ -0,0 +1,3 @@
#include <osg/ConvexPlanerOccluder>
using namespace osg;

4
src/osg/ConvexPlanerPolygon.cpp Normal file
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@ -0,0 +1,4 @@
#include <osg/ConvexPlanerPolygon>
using namespace osg;

5
src/osg/Drawable.cpp
View File

@ -103,7 +103,12 @@ void Drawable::compile(State& state)
globj = glGenLists( 1 );
glNewList( globj, GL_COMPILE );
if (_drawCallback.valid())
_drawCallback->drawImmediateMode(state,this);
else
drawImmediateMode(state);
glEndList();
}

6
src/osg/Geode.cpp
View File

@ -20,6 +20,8 @@ Geode::Geode(const Geode& geode,const CopyOp& copyop):
Drawable* drawable = copyop(itr->get());
if (drawable) addDrawable(drawable);
}
_occluder = dynamic_cast<ConvexPlanerOccluder*>(copyop(geode.getOccluder()));
}
Geode::~Geode()
@ -101,6 +103,8 @@ const bool Geode::computeBound() const
{
BoundingBox bb;
// if (_occluder.valid()) _occluder->computeBound(bb);
DrawableList::const_iterator itr;
for(itr=_drawables.begin();
itr!=_drawables.end();
@ -126,6 +130,8 @@ const bool Geode::computeBound() const
}
}
// if (_occluder.valid()) _occluder->computeBound(_bsphere);
_bsphere_computed=true;
return true;
}

3
src/osg/Makefile
View File

@ -12,6 +12,8 @@ CXXFILES =\
ClipPlane.cpp\
ColorMask.cpp\
ColorMatrix.cpp\
ConvexPlanerPolygon.cpp\
ConvexPlanerOccluder.cpp\
CopyOp.cpp\
CullFace.cpp\
Depth.cpp\
@ -52,6 +54,7 @@ CXXFILES =\
Projection.cpp\
Quat.cpp\
ShadeModel.cpp\
ShadowOccluderVolume.cpp\
State.cpp\
StateSet.cpp\
Stencil.cpp\

3
src/osg/ShadowOccluderVolume.cpp Normal file
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@ -0,0 +1,3 @@
#include <osg/ShadowOccluderVolume>
using namespace osg;