FGFS-4.1/OpenSceneGraph
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Aded extra constructors to BlendFunc and Depth to help set them up convieniently.

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Added a background quad to osghud.
This commit is contained in:
Robert Osfield
2003-05-06 18:04:27 +00:00
parent 06054d9520
commit fa0333b6fe
5 changed files with 92 additions and 34 deletions
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57
examples/osghud/osghud.cpp
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@@ -20,6 +20,7 @@
#include <osg/BlendFunc>
#include <osg/Depth>
#include <osg/Projection>
#include <osg/PolygonOffset>
#include <osg/MatrixTransform>
#include <osgText/Text>
@@ -29,12 +30,13 @@ osg::Node* createHUD()
{
osg::Geode* geode = new osg::Geode();
std::string timesFont("fonts/times.ttf");
std::string timesFont("fonts/arial.ttf");
// turn lighting off for the text and disable depth test to ensure its always ontop.
osg::StateSet* stateset = geode->getOrCreateStateSet();
stateset->setMode(GL_LIGHTING,osg::StateAttribute::OFF);
stateset->setMode(GL_DEPTH_TEST,osg::StateAttribute::OFF);
//stateset->setMode(GL_DEPTH_TEST,osg::StateAttribute::OFF);
stateset->setAttribute(new osg::Depth(osg::Depth::LESS,0.0,0.0001));
osg::Vec3 position(150.0f,800.0f,0.0f);
osg::Vec3 delta(0.0f,-120.0f,0.0f);
@@ -94,7 +96,46 @@ osg::Node* createHUD()
text->setText("And add an osg::ModelViewMatrix set to ABSOLUTE to ensure\nit remains independent from any external model view matrices.");
position += delta;
}
}
{
osg::BoundingBox bb;
for(unsigned int i=0;i<geode->getNumDrawables();++i)
{
bb.expandBy(geode->getDrawable(i)->getBound());
}
osg::Geometry* geom = new osg::Geometry;
osg::Vec3Array* vertices = new osg::Vec3Array;
float depth = bb.zMin()-0.1;
vertices->push_back(osg::Vec3(bb.xMin(),bb.yMax(),depth));
vertices->push_back(osg::Vec3(bb.xMin(),bb.yMin(),depth));
vertices->push_back(osg::Vec3(bb.xMax(),bb.yMin(),depth));
vertices->push_back(osg::Vec3(bb.xMax(),bb.yMax(),depth));
geom->setVertexArray(vertices);
osg::Vec3Array* normals = new osg::Vec3Array;
normals->push_back(osg::Vec3(0.0f,0.0f,1.0f));
geom->setNormalArray(normals);
geom->setNormalBinding(osg::Geometry::BIND_OVERALL);
osg::Vec4Array* colors = new osg::Vec4Array;
colors->push_back(osg::Vec4(1.0f,1.0,0.8f,0.2f));
geom->setColorArray(colors);
geom->setColorBinding(osg::Geometry::BIND_OVERALL);
geom->addPrimitiveSet(new osg::DrawArrays(GL_QUADS,0,4));
osg::StateSet* stateset = geom->getOrCreateStateSet();
stateset->setMode(GL_BLEND,osg::StateAttribute::ON);
//stateset->setAttribute(new osg::PolygonOffset(1.0f,1.0f),osg::StateAttribute::ON);
stateset->setRenderingHint(osg::StateSet::TRANSPARENT_BIN);
geode->addDrawable(geom);
}
// create the hud.
osg::MatrixTransform* modelview_abs = new osg::MatrixTransform;
@@ -167,6 +208,16 @@ int main( int argc, char **argv )
// create the windows and run the threads.
viewer.realize();
// set all the sceneview's up so that their left and right add cull masks are set up.
for(osgProducer::OsgCameraGroup::SceneHandlerList::iterator itr=viewer.getSceneHandlerList().begin();
itr!=viewer.getSceneHandlerList().end();
++itr)
{
osgUtil::SceneView* sceneview = itr->get();
sceneview->setComputeNearFarMode(osgUtil::CullVisitor::DO_NOT_COMPUTE_NEAR_FAR);
}
while( !viewer.done() )
{
// wait for all cull and draw threads to complete.