FGFS-4.1/OpenSceneGraph
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Added --simple option and associated set up of a very simple geometry and shader scene graph

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This commit is contained in:
Robert Osfield 2009-11-04 11:03:13 +00:00
parent da90b3f90a
commit 211ea2f263
1 changed files with 71 additions and 22 deletions
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95
examples/osgvertexattributes/osgvertexattributes.cpp
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@ -283,7 +283,45 @@ class ConvertToVertexAttibArrays : public osg::NodeVisitor
AttributeAlias _texCoordAlias[8];
};
osg::Node* createSimpleTestModel()
{
osg::Group* group = new osg::Group;
osg::Geode* geode = new osg::Geode;
group->addChild(geode);
osg::Geometry* geometry = new osg::Geometry;
geode->addDrawable(geometry);
osg::Vec3Array* vertices = new osg::Vec3Array;
vertices->push_back(osg::Vec3(0.0,0.0,0.0));
vertices->push_back(osg::Vec3(0.0,0.0,1.0));
vertices->push_back(osg::Vec3(1.0,0.0,0.0));
vertices->push_back(osg::Vec3(1.0,0.0,1.0));
geometry->setVertexArray(vertices);
geometry->addPrimitiveSet(new osg::DrawArrays(GL_TRIANGLE_STRIP, 0, 4));
char vertexShaderSource[] =
"void main(void)\n"
"{\n"
" gl_Position = gl_ModelViewProjectionMatrix * gl_Vertex;\n"
"}\n";
char fragmentShaderSource[] =
"void main(void)\n"
"{\n"
" gl_FragColor = vec4(1.0,1.0,0.0,1.0); \n"
"}\n";
osg::Program* program = new osg::Program;
program->addShader(new osg::Shader(osg::Shader::VERTEX, vertexShaderSource));
program->addShader(new osg::Shader(osg::Shader::FRAGMENT, fragmentShaderSource));
geometry->getOrCreateStateSet()->setAttribute(program);
return group;
}
int main(int argc, char *argv[])
{
@ -296,34 +334,45 @@ int main(int argc, char *argv[])
std::string outputFileName;
while (arguments.read("-o",outputFileName)) {}
bool runShaderGen = true;
while (arguments.read("--shader-gen")) { runShaderGen = true; }
while (arguments.read("--no-shader-gen")) { runShaderGen = false; }
osg::ref_ptr<osg::Node> loadedModel;
bool runConvertToVertexAttributes = true;
while (arguments.read("--vertex-attrib")) { runConvertToVertexAttributes = true; }
while (arguments.read("--no-vertex-attrib")) { runConvertToVertexAttributes = false; }
osg::ref_ptr<osg::Node> loadedModel = osgDB::readNodeFiles(arguments);
if (!loadedModel.get())
if (arguments.read("--simple") || arguments.read("--s"))
{
osg::notify(osg::NOTICE)<<"No model loaded, please specify a model filename."<<std::endl;
return 1;
loadedModel = createSimpleTestModel();
}
else
{
bool runShaderGen = true;
while (arguments.read("--shader-gen")) { runShaderGen = true; }
while (arguments.read("--no-shader-gen")) { runShaderGen = false; }
while (arguments.read("--vertex-attrib")) { runConvertToVertexAttributes = true; }
while (arguments.read("--no-vertex-attrib")) { runConvertToVertexAttributes = false; }
loadedModel = osgDB::readNodeFiles(arguments);
if (!loadedModel.get())
{
osg::notify(osg::NOTICE)<<"No model loaded, please specify a model filename."<<std::endl;
return 1;
}
if (runShaderGen)
{
// convert fixed function pipeline to shaders
osgUtil::ShaderGenVisitor sgv;
loadedModel->accept(sgv);
}
if (runConvertToVertexAttributes)
{
// find any conventional vertex, colour, normal and tex coords arrays and convert to vertex attributes
ConvertToVertexAttibArrays ctvaa;
loadedModel->accept(ctvaa);
}
}
if (runShaderGen)
{
// convert fixed function pipeline to shaders
osgUtil::ShaderGenVisitor sgv;
loadedModel->accept(sgv);
}
if (runConvertToVertexAttributes)
{
// find any conventional vertex, colour, normal and tex coords arrays and convert to vertex attributes
ConvertToVertexAttibArrays ctvaa;
loadedModel->accept(ctvaa);
}
if (!loadedModel) return 1;
if (!outputFileName.empty())
{