FGFS-4.1/OpenSceneGraph
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Work on the RenderToTexture usage of the new osg::CameraNode. Both osghud

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and osgprerender now ported across to osg::CameraNode.
This commit is contained in:
Robert Osfield
2005-06-14 20:51:35 +00:00
parent 868d381528
commit 71122ff38f
9 changed files with 507 additions and 195 deletions
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49
examples/osghud/osghud.cpp
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@@ -22,6 +22,7 @@
#include <osg/Projection>
#include <osg/PolygonOffset>
#include <osg/MatrixTransform>
#include <osg/CameraNode>
#include <osgText/Text>
@@ -36,17 +37,6 @@ osg::Node* createHUD()
osg::StateSet* stateset = geode->getOrCreateStateSet();
stateset->setMode(GL_LIGHTING,osg::StateAttribute::OFF);
#if 0
// to ensure the hud appears on top we can either use osg::Depth to force the
// depth fragments to be placed at the front of the screen.
stateset->setAttribute(new osg::Depth(osg::Depth::LESS,0.0,0.0001));
#else
// or disable depth test, and make sure that the hud is drawn after everything
// else so that it always appears ontop.
stateset->setMode(GL_DEPTH_TEST,osg::StateAttribute::OFF);
stateset->setRenderBinDetails(11,"RenderBin");
#endif
osg::Vec3 position(150.0f,800.0f,0.0f);
osg::Vec3 delta(0.0f,-120.0f,0.0f);
@@ -146,6 +136,42 @@ osg::Node* createHUD()
geode->addDrawable(geom);
}
#if 1
osg::CameraNode* camera = new osg::CameraNode;
// set the projection matrix
camera->setProjectionMatrix(osg::Matrix::ortho2D(0,1280,0,1024));
// set the view matrix
camera->setReferenceFrame(osg::Transform::ABSOLUTE_RF);
camera->setViewMatrix(osg::Matrix::identity());
// only clear the depth buffer
camera->setClearMask(GL_DEPTH_BUFFER_BIT);
// draw subgraph after main camera view.
camera->setRenderOrder(osg::CameraNode::POST_RENDER);
camera->addChild(geode);
return camera;
#else
#if 0
// to ensure the hud appears on top we can either use osg::Depth to force the
// depth fragments to be placed at the front of the screen.
stateset->setAttribute(new osg::Depth(osg::Depth::LESS,0.0,0.0001));
#else
// or disable depth test, and make sure that the hud is drawn after everything
// else so that it always appears ontop.
stateset->setMode(GL_DEPTH_TEST,osg::StateAttribute::OFF);
stateset->setRenderBinDetails(11,"RenderBin");
#endif
// create the hud.
osg::MatrixTransform* modelview_abs = new osg::MatrixTransform;
modelview_abs->setReferenceFrame(osg::Transform::ABSOLUTE_RF);
@@ -157,6 +183,7 @@ osg::Node* createHUD()
projection->addChild(modelview_abs);
return projection;
#endif
}