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/* -*-c++-*- OpenSceneGraph - Copyright (C) 1998-2003 Robert Osfield
*
* This application is open source and may be redistributed and / or modified
* freely and without restriction , both in commericial and non commericial applications ,
* as long as this copyright notice is maintained .
*
* This application is distributed in the hope that it will be useful ,
* but WITHOUT ANY WARRANTY ; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE .
*/
# include <osgDB/ReadFile>
# include <osgUtil/Optimizer>
# include <osgProducer/Viewer>
# include <osg/CoordinateSystemNode>
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# include <osg/Texture2D>
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# include <osg/MatrixTransform>
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# include <osgUtil/SmoothingVisitor>
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# include <osgUtil/TransformCallback>
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class PBufferTexture2D : public osg : : Texture2D
{
public :
PBufferTexture2D ( Producer : : RenderSurface * pbuffer ) :
_pbuffer ( pbuffer ) { }
virtual void apply ( osg : : State & state ) const
{
const unsigned int contextID = state . getContextID ( ) ;
TextureObject * textureObject = getTextureObject ( contextID ) ;
if ( textureObject = = 0 )
{
GLuint format =
_pbuffer - > getRenderToTextureMode ( ) = = Producer : : RenderSurface : : RenderToRGBTexture ? GL_RGB :
_pbuffer - > getRenderToTextureMode ( ) = = Producer : : RenderSurface : : RenderToRGBATexture ? GL_RGBA : 0 ;
unsigned int width = _pbuffer - > getWindowWidth ( ) ;
unsigned int height = _pbuffer - > getWindowHeight ( ) ;
_textureObjectBuffer [ contextID ] = textureObject =
generateTextureObject ( contextID , GL_TEXTURE_2D , 1 , format , width , height , 1 , 0 ) ;
textureObject - > bind ( ) ;
applyTexParameters ( GL_TEXTURE_2D , state ) ;
glTexImage2D ( GL_TEXTURE_2D , 0 ,
format , width , height , 0 , format , GL_UNSIGNED_BYTE , 0 ) ;
textureObject - > setAllocated ( true ) ;
}
else
{
textureObject - > bind ( ) ;
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static unsigned int frameNum = 0 ;
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_pbuffer - > bindPBufferToTexture ( Producer : : RenderSurface : : FrontBuffer ) ;
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+ + frameNum ;
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}
}
private :
Producer : : ref_ptr < Producer : : RenderSurface > _pbuffer ;
} ;
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class MyGeometryCallback :
public osg : : Drawable : : UpdateCallback ,
public osg : : Drawable : : AttributeFunctor
{
public :
MyGeometryCallback ( const osg : : Vec3 & o ,
const osg : : Vec3 & x , const osg : : Vec3 & y , const osg : : Vec3 & z ,
double period , double xphase , double amplitude ) :
_firstCall ( true ) ,
_startTime ( 0.0 ) ,
_time ( 0.0 ) ,
_period ( period ) ,
_xphase ( xphase ) ,
_amplitude ( amplitude ) ,
_origin ( o ) ,
_xAxis ( x ) ,
_yAxis ( y ) ,
_zAxis ( z ) { }
virtual void update ( osg : : NodeVisitor * nv , osg : : Drawable * drawable )
{
const osg : : FrameStamp * fs = nv - > getFrameStamp ( ) ;
double referenceTime = fs - > getReferenceTime ( ) ;
if ( _firstCall )
{
_firstCall = false ;
_startTime = referenceTime ;
}
_time = referenceTime - _startTime ;
drawable - > accept ( * this ) ;
drawable - > dirtyBound ( ) ;
osg : : Geometry * geometry = dynamic_cast < osg : : Geometry * > ( drawable ) ;
if ( geometry )
{
osgUtil : : SmoothingVisitor : : smooth ( * geometry ) ;
}
}
virtual void apply ( osg : : Drawable : : AttributeType type , unsigned int count , osg : : Vec3 * begin )
{
if ( type = = osg : : Drawable : : VERTICES )
{
const float TwoPI = 2.0f * osg : : PI ;
const float phase = - _time / _period ;
osg : : Vec3 * end = begin + count ;
for ( osg : : Vec3 * itr = begin ; itr < end ; + + itr )
{
osg : : Vec3 dv ( * itr - _origin ) ;
osg : : Vec3 local ( dv * _xAxis , dv * _yAxis , dv * _zAxis ) ;
local . z ( ) = local . x ( ) * _amplitude *
sinf ( TwoPI * ( phase + local . x ( ) * _xphase ) ) ;
( * itr ) = _origin +
_xAxis * local . x ( ) +
_yAxis * local . y ( ) +
_zAxis * local . z ( ) ;
}
}
}
bool _firstCall ;
double _startTime ;
double _time ;
double _period ;
double _xphase ;
float _amplitude ;
osg : : Vec3 _origin ;
osg : : Vec3 _xAxis ;
osg : : Vec3 _yAxis ;
osg : : Vec3 _zAxis ;
} ;
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osg : : Node * createTexturedFlag ( unsigned int width , unsigned int height , Producer : : RenderSurface * pbuffer )
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{
// create the quad to visualize.
osg : : Geometry * polyGeom = new osg : : Geometry ( ) ;
polyGeom - > setSupportsDisplayList ( false ) ;
osg : : Vec3 origin ( 0.0f , 0.0f , 0.0f ) ;
osg : : Vec3 xAxis ( 1.0f , 0.0f , 0.0f ) ;
osg : : Vec3 yAxis ( 0.0f , 0.0f , 1.0f ) ;
osg : : Vec3 zAxis ( 0.0f , - 1.0f , 0.0f ) ;
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float flag_height = 100.0f ;
float flag_width = 200.0f ;
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int noSteps = 20 ;
osg : : Vec3Array * vertices = new osg : : Vec3Array ;
osg : : Vec3 bottom = origin ;
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osg : : Vec3 top = origin ; top . z ( ) + = flag_height ;
osg : : Vec3 dv = xAxis * ( flag_width / ( ( float ) ( noSteps - 1 ) ) ) ;
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osg : : Vec2Array * texcoords = new osg : : Vec2Array ;
osg : : Vec2 bottom_texcoord ( 0.0f , 0.0f ) ;
osg : : Vec2 top_texcoord ( 0.0f , 1.0f ) ;
osg : : Vec2 dv_texcoord ( 1.0f / ( float ) ( noSteps - 1 ) , 0.0f ) ;
for ( int i = 0 ; i < noSteps ; + + i )
{
vertices - > push_back ( top ) ;
vertices - > push_back ( bottom ) ;
top + = dv ;
bottom + = dv ;
texcoords - > push_back ( top_texcoord ) ;
texcoords - > push_back ( bottom_texcoord ) ;
top_texcoord + = dv_texcoord ;
bottom_texcoord + = dv_texcoord ;
}
// pass the created vertex array to the points geometry object.
polyGeom - > setVertexArray ( vertices ) ;
polyGeom - > setTexCoordArray ( 0 , texcoords ) ;
osg : : Vec4Array * colors = new osg : : Vec4Array ;
colors - > push_back ( osg : : Vec4 ( 1.0f , 1.0f , 1.0f , 1.0f ) ) ;
polyGeom - > setColorArray ( colors ) ;
polyGeom - > setColorBinding ( osg : : Geometry : : BIND_OVERALL ) ;
polyGeom - > addPrimitiveSet ( new osg : : DrawArrays ( osg : : PrimitiveSet : : QUAD_STRIP , 0 , vertices - > size ( ) ) ) ;
// new we need to add the texture to the Drawable, we do so by creating a
// StateSet to contain the Texture StateAttribute.
osg : : StateSet * stateset = new osg : : StateSet ;
// Dynamic texture filled with data from pbuffer.
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osg : : Texture2D * texture = new PBufferTexture2D ( pbuffer ) ;
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texture - > setInternalFormat ( GL_RGB ) ;
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texture - > setTextureSize ( width , height ) ;
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texture - > setFilter ( osg : : Texture2D : : MIN_FILTER , osg : : Texture2D : : LINEAR ) ;
texture - > setFilter ( osg : : Texture2D : : MAG_FILTER , osg : : Texture2D : : LINEAR ) ;
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texture - > setWrap ( osg : : Texture2D : : WRAP_S , osg : : Texture2D : : CLAMP ) ;
texture - > setWrap ( osg : : Texture2D : : WRAP_T , osg : : Texture2D : : CLAMP ) ;
stateset - > setTextureAttributeAndModes ( 0 , texture , osg : : StateAttribute : : ON | osg : : StateAttribute : : OVERRIDE ) ;
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polyGeom - > setStateSet ( stateset ) ;
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polyGeom - > setUpdateCallback ( new MyGeometryCallback ( origin , xAxis , yAxis , zAxis , 1.0 , 1.0 / flag_width , 0.2f ) ) ;
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osg : : Geode * geode = new osg : : Geode ( ) ;
geode - > addDrawable ( polyGeom ) ;
osg : : Group * parent = new osg : : Group ;
parent - > addChild ( geode ) ;
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return parent ;
}
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osg : : ref_ptr < osg : : Node > buildSceneGraphAndSetCameraViews ( osg : : Node * loadedModel ,
Producer : : Camera * pbufferCamera ,
Producer : : Camera * mainCamera )
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{
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osg : : ref_ptr < osg : : Group > group = new osg : : Group ;
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osg : : ref_ptr < osg : : MatrixTransform > loadedModelTransform = new osg : : MatrixTransform ;
loadedModelTransform - > addChild ( loadedModel ) ;
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osg : : ref_ptr < osg : : NodeCallback > nc = new osgUtil : : TransformCallback (
loadedModelTransform - > getBound ( ) . center ( ) , osg : : Vec3 ( 0.0f , 0.0f , 1.0f ) , osg : : inDegrees ( 45.0f ) ) ;
loadedModelTransform - > setUpdateCallback ( nc . get ( ) ) ;
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loadedModelTransform - > setNodeMask ( 0x1 ) ;
group - > addChild ( loadedModelTransform . get ( ) ) ;
osg : : ref_ptr < osg : : Node > texturedFlag = createTexturedFlag ( 1024 , 512 , pbufferCamera - > getRenderSurface ( ) ) ;
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texturedFlag - > setNodeMask ( 0x2 ) ;
group - > addChild ( texturedFlag . get ( ) ) ;
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osg : : BoundingSphere bs = loadedModel - > getBound ( ) ;
pbufferCamera - > setLensFrustum ( - 0.5 , 0.5 , - 0.25 , 0.25 , 1.0 , 1000.0 ) ;
pbufferCamera - > setViewByLookat (
bs . center ( ) [ 0 ] , bs . center ( ) [ 1 ] - bs . radius ( ) * 3 , bs . center ( ) [ 2 ] ,
bs . center ( ) [ 0 ] , bs . center ( ) [ 1 ] , bs . center ( ) [ 2 ] ,
0 , 0 , 1 ) ;
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mainCamera - > getRenderSurface ( ) - > setReadDrawable ( pbufferCamera - > getRenderSurface ( ) ) ;
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return group . get ( ) ;
}
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osg : : ref_ptr < osg : : Node > buildSceneGraph ( osg : : Node * loadedModel , Producer : : RenderSurface * pbuffer )
{
osg : : ref_ptr < osg : : Group > group = new osg : : Group ;
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osg : : ref_ptr < osg : : MatrixTransform > loadedModelTransform = new osg : : MatrixTransform ;
loadedModelTransform - > addChild ( loadedModel ) ;
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osg : : ref_ptr < osg : : NodeCallback > nc = new osgUtil : : TransformCallback (
loadedModelTransform - > getBound ( ) . center ( ) , osg : : Vec3 ( 0.0f , 0.0f , 1.0f ) , osg : : inDegrees ( 45.0f ) ) ;
loadedModelTransform - > setUpdateCallback ( nc . get ( ) ) ;
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// Set the loaded model to render only in the PBuffer camera
loadedModelTransform - > setNodeMask ( 0x1 ) ;
group - > addChild ( loadedModelTransform . get ( ) ) ;
osg : : ref_ptr < osg : : Node > texturedFlag = createTexturedFlag ( 1024 , 512 , pbuffer ) ;
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// Set the textured flag to render only in the Main camera
loadedModelTransform - > setNodeMask ( 0x1 ) ;
texturedFlag - > setNodeMask ( 0x2 ) ;
group - > addChild ( texturedFlag . get ( ) ) ;
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return group . get ( ) ;
}
Producer : : ref_ptr < Producer : : CameraConfig > buildCameraConfig ( osg : : Node & loadedModel )
{
// Set up the PBuffer camera
Producer : : ref_ptr < Producer : : Camera > pbufferCamera = new Producer : : Camera ;
pbufferCamera - > getRenderSurface ( ) - > setWindowRectangle ( 0 , 0 , 1024 , 512 ) ;
pbufferCamera - > getRenderSurface ( ) - > setDrawableType ( Producer : : RenderSurface : : DrawableType_PBuffer ) ;
pbufferCamera - > getRenderSurface ( ) - > setRenderToTextureMode ( Producer : : RenderSurface : : RenderToRGBATexture ) ;
// We will manually set the PBuffer camera's Lens and View,
// so do not share with the rest of the Camera config.
pbufferCamera - > setShareLens ( false ) ;
pbufferCamera - > setShareView ( false ) ;
// Set the Lens and View for the Pbuffer camera according to the loaded model's size
osg : : BoundingSphere bs = loadedModel . getBound ( ) ;
pbufferCamera - > setLensFrustum ( - 0.5 , 0.5 , - 0.25 , 0.25 , 1.0 , 1000.0 ) ;
pbufferCamera - > setViewByLookat (
bs . center ( ) [ 0 ] , bs . center ( ) [ 1 ] - bs . radius ( ) * 3 , bs . center ( ) [ 2 ] ,
bs . center ( ) [ 0 ] , bs . center ( ) [ 1 ] , bs . center ( ) [ 2 ] ,
0 , 0 , 1 ) ;
// Set up the main camera
Producer : : ref_ptr < Producer : : Camera > mainCamera = new Producer : : Camera ;
mainCamera - > getRenderSurface ( ) - > setWindowRectangle ( 0 , 0 , 800 , 600 ) ;
// Create the Camera config
Producer : : ref_ptr < Producer : : CameraConfig > cfg = new Producer : : CameraConfig ;
// Cameras added in "alphabetical" order
cfg - > addCamera ( " A_PBufferCamera " , pbufferCamera . get ( ) ) ;
cfg - > addCamera ( " B_MainCamera " , mainCamera . get ( ) ) ;
// Set up the input area
Producer : : ref_ptr < Producer : : InputArea > inputArea = new Producer : : InputArea ;
inputArea - > addRenderSurface ( mainCamera - > getRenderSurface ( ) ) ;
cfg - > setInputArea ( inputArea . get ( ) ) ;
// Set the main Camera's read drawable to be the pbufferCamera's drawable
mainCamera - > getRenderSurface ( ) - > setReadDrawable ( pbufferCamera - > getRenderSurface ( ) ) ;
return cfg ;
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}
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int main ( int argc , char * * argv )
{
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// use an ArgumentParser object to manage the program arguments.
osg : : ArgumentParser arguments ( & argc , argv ) ;
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// set up the usage document, in case we need to print out how to use this program.
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arguments . getApplicationUsage ( ) - > setApplicationName ( arguments . getApplicationName ( ) ) ;
arguments . getApplicationUsage ( ) - > setDescription ( arguments . getApplicationName ( ) + " is the standard OpenSceneGraph example which loads and visualises 3d models. " ) ;
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arguments . getApplicationUsage ( ) - > setCommandLineUsage ( arguments . getApplicationName ( ) + " [options] filename ... " ) ;
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arguments . getApplicationUsage ( ) - > addCommandLineOption ( " --image <filename> " , " Load an image and render it on a quad " ) ;
arguments . getApplicationUsage ( ) - > addCommandLineOption ( " --dem <filename> " , " Load an image/DEM and render it on a HeightField " ) ;
arguments . getApplicationUsage ( ) - > addCommandLineOption ( " -h or --help " , " Display command line paramters " ) ;
arguments . getApplicationUsage ( ) - > addCommandLineOption ( " --help-env " , " Display environmental variables available " ) ;
arguments . getApplicationUsage ( ) - > addCommandLineOption ( " --help-keys " , " Display keyboard & mouse bindings available " ) ;
arguments . getApplicationUsage ( ) - > addCommandLineOption ( " --help-all " , " Display all command line, env vars and keyboard & mouse bindigs. " ) ;
/// Load models from command line and build scene graph
osg : : Timer_t start_tick = osg : : Timer : : instance ( ) - > tick ( ) ;
// read the scene from the list of file specified commandline args.
osg : : ref_ptr < osg : : Node > loadedModel = osgDB : : readNodeFiles ( arguments ) ;
// if no model has been successfully loaded report failure.
if ( ! loadedModel )
{
std : : cout < < arguments . getApplicationName ( ) < < " : No data loaded " < < std : : endl ;
return 1 ;
}
// Create the camera config. We use the loaded model to set the Lens and View on the PBuffer camera
Producer : : ref_ptr < Producer : : CameraConfig > cameraConfig = buildCameraConfig ( * ( loadedModel . get ( ) ) ) ;
// We need to build the rest of the scene graph after the camera config has been created because we need
// to pass it the PBuffer, which will be the texture for the textured flag
Producer : : RenderSurface * pbuffer = cameraConfig - > getCamera ( 0 ) - > getRenderSurface ( ) ;
osg : : ref_ptr < osg : : Node > root = buildSceneGraph ( loadedModel . get ( ) , pbuffer ) ;
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// construct the viewer with the camera config.
osgProducer : : Viewer viewer ( cameraConfig . get ( ) ) ;
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// set up the value with sensible default event handlers.
viewer . setUpViewer ( osgProducer : : Viewer : : STANDARD_SETTINGS ) ;
// get details on keyboard and mouse bindings used by the viewer.
viewer . getUsage ( * arguments . getApplicationUsage ( ) ) ;
// if user request help write it out to cout.
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bool helpAll = arguments . read ( " --help-all " ) ;
unsigned int helpType = ( ( helpAll | | arguments . read ( " -h " ) | | arguments . read ( " --help " ) ) ? osg : : ApplicationUsage : : COMMAND_LINE_OPTION : 0 ) |
( ( helpAll | | arguments . read ( " --help-env " ) ) ? osg : : ApplicationUsage : : ENVIRONMENTAL_VARIABLE : 0 ) |
( ( helpAll | | arguments . read ( " --help-keys " ) ) ? osg : : ApplicationUsage : : KEYBOARD_MOUSE_BINDING : 0 ) ;
if ( helpType )
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{
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arguments . getApplicationUsage ( ) - > write ( std : : cout , helpType ) ;
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return 1 ;
}
// report any errors if they have occured when parsing the program aguments.
if ( arguments . errors ( ) )
{
arguments . writeErrorMessages ( std : : cout ) ;
return 1 ;
}
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if ( arguments . argc ( ) < = 1 )
{
arguments . getApplicationUsage ( ) - > write ( std : : cout , osg : : ApplicationUsage : : COMMAND_LINE_OPTION ) ;
return 1 ;
}
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// any option left unread are converted into errors to write out later.
arguments . reportRemainingOptionsAsUnrecognized ( ) ;
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// report any errors if they have occured when parsing the program aguments.
if ( arguments . errors ( ) )
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{
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arguments . writeErrorMessages ( std : : cout ) ;
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}
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osg : : Timer_t end_tick = osg : : Timer : : instance ( ) - > tick ( ) ;
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std : : cout < < " Time to load = " < < osg : : Timer : : instance ( ) - > delta_s ( start_tick , end_tick ) < < std : : endl ;
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// optimize the scene graph, remove rendundent nodes and state etc.
osgUtil : : Optimizer optimizer ;
optimizer . optimize ( root . get ( ) ) ;
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// pass the loaded scene graph to the viewer.
viewer . setSceneData ( root . get ( ) ) ;
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// create the windows and run the threads.
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viewer . realize ( ) ;
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// The loaded model is to be viewed in the pbuffer camera, but
// the textured flag is viewed in the main camera. The nodes have
// been given node masks, now set the traversal masks on the cameras.
// Note that this must be done after viewer.realize().
{
osgProducer : : Viewer : : SceneHandlerList shl = viewer . getSceneHandlerList ( ) ;
osgProducer : : Viewer : : SceneHandlerList : : iterator p ;
unsigned int n = 0 ;
for ( p = shl . begin ( ) ; p ! = shl . end ( ) ; p + + )
{
int inheritanceMask = ( * p ) - > getSceneView ( ) - > getInheritanceMask ( ) ;
inheritanceMask & = ~ ( osg : : CullSettings : : CULL_MASK ) ;
( * p ) - > getSceneView ( ) - > setInheritanceMask ( inheritanceMask ) ;
( * p ) - > getSceneView ( ) - > setCullMask ( 1 < < ( n ) ) ;
n + + ;
}
}
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// printf( "PBuffer window: 0x%x\n", pbuffer->getWindow() );
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viewer . getCamera ( 0 ) - > setClearColor ( 0.1f , 0.9f , 0.3f , 1.0f ) ;
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while ( ! viewer . done ( ) )
{
// wait for all cull and draw threads to complete.
viewer . sync ( ) ;
// update the scene by traversing it with the the update visitor which will
// call all node update callbacks and animations.
viewer . update ( ) ;
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// fire off the cull and draw traversals of the scene.
viewer . frame ( ) ;
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}
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// wait for all cull and draw threads to complete before exit.
viewer . sync ( ) ;
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// run a clean up frame to delete all OpenGL objects.
viewer . cleanup_frame ( ) ;
// wait for all the clean up frame to complete.
viewer . sync ( ) ;
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return 0 ;
}
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