FGFS-4.1/OpenSceneGraph
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Introduced new osg::PatchParameter StateAttribute class to wrap up glPatchParameter associated state.

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Note, osg::Program::setParameter(GL_PATCH_VERTICES,num); is nolonger support and should be replaced by using the new PatchParameter class.
This commit is contained in:
Robert Osfield
2013-06-11 10:52:37 +00:00
parent 4623c251bb
commit 1a7f2fcb3e
8 changed files with 155 additions and 58 deletions
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4
examples/osgtessellationshaders/osgtessellationshaders.cpp
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@@ -4,6 +4,7 @@
*/
#include <osg/Program>
#include <osg/PatchParameter>
#include <osg/ShapeDrawable>
#include <osgViewer/Viewer>
#include <osgViewer/ViewerEventHandlers>
@@ -175,7 +176,6 @@ osg::ref_ptr<osg::Program> createProgram(){
program->setParameter(GL_GEOMETRY_VERTICES_OUT_EXT, 3);
program->setParameter(GL_GEOMETRY_INPUT_TYPE_EXT, GL_TRIANGLES);
program->setParameter(GL_GEOMETRY_OUTPUT_TYPE_EXT, GL_TRIANGLE_STRIP);
program->setParameter(GL_PATCH_VERTICES,3);
return program;
}
@@ -213,6 +213,7 @@ public:
return osgGA::GUIEventHandler::handle(ea,gaa);
}
};
int main(int argc, char* argv[])
{
osgViewer::Viewer viewer;
@@ -226,6 +227,7 @@ int main(int argc, char* argv[])
state->addUniform(new osg::Uniform("LightPosition",osg::Vec3(0.25f, 0.25f, 1.0f)));
state->addUniform(tessInnerU.get());
state->addUniform(tessOuterU.get());
state->setAttribute(new osg::PatchParameter(3));
state->setAttribute(program.get());
// switch on the uniforms that track the modelview and projection matrices