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Added examples directory, a place for all new OSG demo code.

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Added osgcameragroup, osgviewer, osgtext, osgconv to the new examples directory.
This commit is contained in:
Robert Osfield
2003-02-21 14:05:39 +00:00
parent 0d56658191
commit 3b429134cb
16 changed files with 1138 additions and 1 deletions
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examples/osgtext/osgtext.cpp Normal file
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/* -*-c++-*- OpenSceneGraph - Copyright (C) 1998-2003 Robert Osfield
*
* This library is open source and may be redistributed and/or modified under
* the terms of the OpenSceneGraph Public License (OSGPL) version 0.0 or
* (at your option) any later version. The full license is in LICENSE file
* included with this distribution, and on the openscenegraph.org website.
*
* This library 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. See the
* OpenSceneGraph Public License for more details.
*/
#include <osgUtil/Optimizer>
#include <osgDB/ReadFile>
#include <osgProducer/Viewer>
#include <osg/Material>
#include <osg/Geode>
#include <osg/BlendFunc>
#include <osg/Depth>
#include <osg/Projection>
#include <osg/MatrixTransform>
#include <osgText/Text>
///////////////////////////////////////////////////////////////////////////////
// globals
#define TEXT_POLYGON "Polygon Font - jygq"
#define TEXT_OUTLINE "Outline Font - jygq"
#define TEXT_TEXTURE "Texture Font - jygq"
#define TEXT_BITMAP "Bitmap Font - jygq"
#define TEXT_PIXMAP "Pixmap Font - jygq"
#define TEXT_COL_2D osg::Vec4(.9,.9,.9,1)
#define TEXT_COL_3D osg::Vec4(.99,.3,.2,1)
std::string ttfPath("fonts/times.ttf");
std::string ttfPath1("fonts/arial.ttf");
int gFontSize=18;
int gFontSize1=24;
std::vector<osg::ref_ptr<osgText::Text > > gTextList;
osgText::Text::AlignmentType gAlignment=osgText::Text::LEFT_BOTTOM;
osg::Group* createText()
{
osg::Group* rootNode = new osg::Group;
osgText::Text* text;
osg::Geode* geode;
osg::Material* textMaterial;
osg::StateSet* textState;
double xOffset=150;
double yOffset=gFontSize+10;
///////////////////////////////////////////////////////////////////////////
// setup the texts
///////////////////////////////////////////////////////////////////////////
// BitmapFont
osgText::BitmapFont* bitmapFont= new osgText::BitmapFont(ttfPath,
gFontSize1);
text= new osgText::Text(bitmapFont);
gTextList.push_back(text);
text->setText(std::string("2d ")+std::string(TEXT_BITMAP));
text->setPosition(osg::Vec3(xOffset,yOffset,0));
text->setDrawMode( osgText::Text::TEXT |
osgText::Text::BOUNDINGBOX |
osgText::Text::ALIGNMENT );
text->setAlignment(gAlignment);
geode = new osg::Geode();
geode->setName("BitmapFont");
geode->addDrawable( text );
textMaterial = new osg::Material();
textMaterial->setColorMode( osg::Material::AMBIENT_AND_DIFFUSE);
textMaterial->setDiffuse( osg::Material::FRONT_AND_BACK, TEXT_COL_2D);
textState = new osg::StateSet();
textState->setAttribute(textMaterial );
geode->setStateSet( textState );
rootNode->addChild(geode);
xOffset+=90;
yOffset+=120;
///////////////////////////////////////////////////////////////////////////
// PixmapFont
osgText::PixmapFont* pixmapFont= new osgText::PixmapFont(ttfPath,
gFontSize1);
text= new osgText::Text(pixmapFont);
gTextList.push_back(text);
text->setText(std::string("2d ")+std::string(TEXT_PIXMAP));
text->setPosition(osg::Vec3(xOffset,yOffset,0));
text->setDrawMode( osgText::Text::TEXT |
osgText::Text::BOUNDINGBOX |
osgText::Text::ALIGNMENT );
text->setAlignment(gAlignment);
geode = new osg::Geode();
geode->setName("PixmapFont");
geode->addDrawable( text );
textMaterial = new osg::Material();
textMaterial->setColorMode( osg::Material::AMBIENT_AND_DIFFUSE);
textMaterial->setDiffuse( osg::Material::FRONT_AND_BACK,TEXT_COL_2D);
// to get antiaA pixmapFonts we have to draw them with blending
osg::BlendFunc *transp= new osg::BlendFunc();
transp->setFunction(GL_SRC_ALPHA,GL_ONE_MINUS_SRC_ALPHA);
textState = new osg::StateSet();
textState->setAttribute(textMaterial );
textState->setAttribute(transp);
textState->setMode(GL_BLEND,osg::StateAttribute::ON);
textState->setRenderingHint(osg::StateSet::TRANSPARENT_BIN);
geode->setStateSet( textState );
rootNode->addChild(geode);
xOffset+=90;
yOffset+=120;
///////////////////////////////////////////////////////////////////////////
// TextureFont
osgText::TextureFont* textureFont= new osgText::TextureFont(ttfPath1,
gFontSize1);
text= new osgText::Text(textureFont);
gTextList.push_back(text);
text->setText(std::string("2d ")+std::string(TEXT_TEXTURE));
text->setPosition(osg::Vec3(xOffset,yOffset,0));
text->setDrawMode( osgText::Text::TEXT |
osgText::Text::BOUNDINGBOX |
osgText::Text::ALIGNMENT );
text->setAlignment(gAlignment);
geode = new osg::Geode();
geode->setName("TextureFont");
geode->addDrawable( text );
textMaterial = new osg::Material();
textMaterial->setColorMode( osg::Material::AMBIENT_AND_DIFFUSE);
textMaterial->setDiffuse( osg::Material::FRONT_AND_BACK, TEXT_COL_2D);
// to get antiaA pixmapFonts we have to draw them with blending
transp= new osg::BlendFunc();
transp->setFunction(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
textState = new osg::StateSet();
textState->setAttribute(textMaterial );
textState->setAttribute(transp);
textState->setTextureMode(0,GL_TEXTURE_2D,osg::StateAttribute::ON);
textState->setRenderingHint(osg::StateSet::TRANSPARENT_BIN);
geode->setStateSet( textState );
rootNode->addChild(geode);
xOffset+=90;
yOffset+=120;
///////////////////////////////////////////////////////////////////////////
// PolygonFont
osgText::PolygonFont* polygonFont= new osgText::PolygonFont(ttfPath,
gFontSize1,
3);
text= new osgText::Text(polygonFont);
gTextList.push_back(text);
text->setText(std::string("2d ")+std::string("TEXT_POLYGON"));
text->setPosition(osg::Vec3(xOffset,yOffset,0));
text->setDrawMode( osgText::Text::TEXT |
osgText::Text::BOUNDINGBOX |
osgText::Text::ALIGNMENT );
text->setAlignment(gAlignment);
geode = new osg::Geode();
geode->setName("PolygonFont");
geode->addDrawable( text );
textMaterial = new osg::Material();
textMaterial->setColorMode( osg::Material::AMBIENT_AND_DIFFUSE);
textMaterial->setDiffuse( osg::Material::FRONT_AND_BACK, TEXT_COL_2D);
textState = new osg::StateSet();
textState->setAttribute(textMaterial );
geode->setStateSet( textState );
rootNode->addChild(geode);
xOffset+=90;
yOffset+=120;
///////////////////////////////////////////////////////////////////////////
// OutlineFont
osgText::OutlineFont* outlineFont= new osgText::OutlineFont(ttfPath,
gFontSize1,
3);
text= new osgText::Text(outlineFont);
gTextList.push_back(text);
text->setText(std::string("2d ")+std::string(TEXT_OUTLINE));
text->setPosition(osg::Vec3(xOffset,yOffset,0));
text->setDrawMode( osgText::Text::TEXT |
osgText::Text::BOUNDINGBOX |
osgText::Text::ALIGNMENT );
text->setAlignment(gAlignment);
geode = new osg::Geode();
geode->setName("OutlineFont");
geode->addDrawable( text );
textMaterial = new osg::Material();
textMaterial->setColorMode( osg::Material::AMBIENT_AND_DIFFUSE);
textMaterial->setDiffuse( osg::Material::FRONT_AND_BACK, TEXT_COL_2D);
textState = new osg::StateSet();
textState->setAttribute(textMaterial );
geode->setStateSet( textState );
rootNode->addChild(geode);
// now add a depth attribute to the scene to force it to draw on top.
osg::Depth* depth = new osg::Depth;
depth->setRange(0.0,0.0);
osg::StateSet* rootState = new osg::StateSet();
rootState->setAttribute(depth);
rootState->setMode(GL_LIGHTING,osg::StateAttribute::OFF);
rootNode->setStateSet(rootState);
return rootNode;
}
int main( int argc, char **argv )
{
// use an ArgumentParser object to manage the program arguments.
osg::ArgumentParser arguments(&argc,argv);
// set up the usage document, in case we need to print out how to use this program.
arguments.getApplicationUsage()->setCommandLineUsage(arguments.getProgramName()+" [options] [filename] ...");
arguments.getApplicationUsage()->addCommandLineOption("-h or --help","Display this information");
// construct the viewer.
osgProducer::Viewer viewer(arguments);
// 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.
if (arguments.read("-h") || arguments.read("--help"))
{
arguments.getApplicationUsage()->write(cout);
return 1;
}
// any option left unread are converted into errors to write out later.
arguments.reportRemainingOptionsAsUnrecognized();
// report any errors if they have occured when parsing the program aguments.
if (arguments.errors())
{
arguments.writeErrorMessages(cout);
return 1;
}
// read the scene from the list of file specified commandline args.
osg::ref_ptr<osg::Node> rootNode = osgDB::readNodeFiles(arguments);
// prepare scene.
{
if (rootNode.valid())
{
// optimize the scene graph, remove rendundent nodes and state etc.
osgUtil::Optimizer optimizer;
optimizer.optimize(rootNode.get());
}
// make sure the root node is group so we can add extra nodes to it.
osg::Group* group = dynamic_cast<osg::Group*>(rootNode.get());
if (!group)
{
group = new osg::Group;
if (rootNode.valid()) group->addChild(rootNode.get());
rootNode = group;
}
// create the hud.
osg::Projection* projection = new osg::Projection;
projection->setMatrix(osg::Matrix::ortho2D(0,1024,0,768));
osg::MatrixTransform* modelview_abs = new osg::MatrixTransform;
modelview_abs->setReferenceFrame(osg::Transform::RELATIVE_TO_ABSOLUTE);
modelview_abs->setMatrix(osg::Matrix::identity());
modelview_abs->addChild(createText());
projection->addChild(modelview_abs);
group->addChild(projection);
}
// set the scene to render
viewer.setSceneData(rootNode.get());
// create the windows and run the threads.
viewer.realize(Producer::CameraGroup::ThreadPerCamera);
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();
// fire off the cull and draw traversals of the scene.
viewer.frame();
}
return 0;
}