New osgvertexattributes example designed to test conversion of fixed function scene graphs to use vertex shaders
and vertex attributes.
This commit is contained in:
Robert Osfield
parent
58b3fe2664
commit
3f55f3f140
@ -112,6 +112,7 @@ IF(DYNAMIC_OPENSCENEGRAPH)
|
||||
ADD_SUBDIRECTORY(osgthirdpersonview)
|
||||
ADD_SUBDIRECTORY(osgunittests)
|
||||
ADD_SUBDIRECTORY(osgvertexprogram)
|
||||
ADD_SUBDIRECTORY(osgvertexattributes)
|
||||
ADD_SUBDIRECTORY(osgvolume)
|
||||
ADD_SUBDIRECTORY(osgwindows)
|
||||
ADD_SUBDIRECTORY(osganimationtimeline)
|
||||
|
||||
4
examples/osgvertexattributes/CMakeLists.txt
Normal file
4
examples/osgvertexattributes/CMakeLists.txt
Normal file
@ -0,0 +1,4 @@
|
||||
SET(TARGET_SRC osgvertexattributes.cpp )
|
||||
|
||||
#### end var setup ###
|
||||
SETUP_EXAMPLE(osgvertexattributes)
|
||||
185
examples/osgvertexattributes/osgvertexattributes.cpp
Normal file
185
examples/osgvertexattributes/osgvertexattributes.cpp
Normal file
@ -0,0 +1,185 @@
|
||||
/* OpenSceneGraph example, osgvertexattributes.
|
||||
*
|
||||
* Permission is hereby granted, free of charge, to any person obtaining a copy
|
||||
* of this software and associated documentation files (the "Software"), to deal
|
||||
* in the Software without restriction, including without limitation the rights
|
||||
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
|
||||
* copies of the Software, and to permit persons to whom the Software is
|
||||
* furnished to do so, subject to the following conditions:
|
||||
*
|
||||
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
||||
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
||||
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
|
||||
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
||||
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
|
||||
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
|
||||
* THE SOFTWARE.
|
||||
*/
|
||||
|
||||
#include <osgUtil/ShaderGen>
|
||||
#include <osgDB/ReadFile>
|
||||
#include <osgDB/WriteFile>
|
||||
#include <osgViewer/Viewer>
|
||||
|
||||
class ConvertToVertexAttibArrays : public osg::NodeVisitor
|
||||
{
|
||||
public:
|
||||
|
||||
typedef std::pair<unsigned int, std::string> AttributeAlias;
|
||||
|
||||
ConvertToVertexAttibArrays():
|
||||
osg::NodeVisitor(osg::NodeVisitor::TRAVERSE_ALL_CHILDREN)
|
||||
{
|
||||
// mappings taken from http://www.opengl.org/registry/specs/NV/vertex_program.txt
|
||||
_vertexAlias = AttributeAlias(0, "osg_Vertex");
|
||||
_normalAlias = AttributeAlias(2, "osg_Normal");
|
||||
_colorAlias = AttributeAlias(3, "osg_Color");
|
||||
_secondaryColorAlias = AttributeAlias(4, "osg_SecondaryColor");
|
||||
_fogCoordAlias = AttributeAlias(5, "osg_FogCoord");
|
||||
_texCoordAlias[0] = AttributeAlias(8, "osg_MultiTexCoord0");
|
||||
_texCoordAlias[1] = AttributeAlias(9, "osg_MultiTexCoord1");
|
||||
_texCoordAlias[2] = AttributeAlias(10, "osg_MultiTexCoord2");
|
||||
_texCoordAlias[3] = AttributeAlias(11, "osg_MultiTexCoord3");
|
||||
_texCoordAlias[4] = AttributeAlias(12, "osg_MultiTexCoord4");
|
||||
_texCoordAlias[5] = AttributeAlias(13, "osg_MultiTexCoord5");
|
||||
_texCoordAlias[6] = AttributeAlias(14, "osg_MultiTexCoord6");
|
||||
_texCoordAlias[7] = AttributeAlias(15, "osg_MultiTexCoord7");
|
||||
}
|
||||
|
||||
|
||||
void apply(osg::Geode& geode)
|
||||
{
|
||||
for(unsigned int i=0; i<geode.getNumDrawables(); ++i)
|
||||
{
|
||||
osg::Geometry* geom = geode.getDrawable(i)->asGeometry();
|
||||
if (geom) apply(*geom);
|
||||
}
|
||||
}
|
||||
|
||||
void apply(osg::Geometry& geom)
|
||||
{
|
||||
osg::notify(osg::NOTICE)<<"Found geometry "<<&geom<<std::endl;
|
||||
if (geom.getVertexArray())
|
||||
{
|
||||
setVertexAttrib(geom, _vertexAlias, geom.getVertexArray(), false, osg::Geometry::BIND_PER_VERTEX);
|
||||
geom.setVertexArray(0);
|
||||
}
|
||||
|
||||
if (geom.getNormalArray())
|
||||
{
|
||||
setVertexAttrib(geom, _normalAlias, geom.getNormalArray(), true, geom.getNormalBinding());
|
||||
geom.setNormalArray(0);
|
||||
}
|
||||
|
||||
if (geom.getColorArray())
|
||||
{
|
||||
setVertexAttrib(geom, _colorAlias, geom.getColorArray(), true, geom.getColorBinding());
|
||||
geom.setColorArray(0);
|
||||
}
|
||||
|
||||
if (geom.getSecondaryColorArray())
|
||||
{
|
||||
setVertexAttrib(geom, _secondaryColorAlias, geom.getSecondaryColorArray(), true, geom.getSecondaryColorBinding());
|
||||
geom.setSecondaryColorArray(0);
|
||||
}
|
||||
|
||||
if (geom.getFogCoordArray())
|
||||
{
|
||||
// should we normalize the FogCoord array? Don't think so...
|
||||
setVertexAttrib(geom, _fogCoordAlias, geom.getFogCoordArray(), false, geom.getSecondaryColorBinding());
|
||||
geom.setFogCoordArray(0);
|
||||
}
|
||||
|
||||
unsigned int maxNumTexCoords = geom.getNumTexCoordArrays();
|
||||
if (maxNumTexCoords>8)
|
||||
{
|
||||
osg::notify(osg::NOTICE)<<"Warning: Ignoring "<<maxNumTexCoords-8<<" texture coordinate arrays, only 8 are currently supported in vertex attribute conversion code."<<std::endl;
|
||||
maxNumTexCoords = 8;
|
||||
}
|
||||
for(unsigned int i=0; i<maxNumTexCoords; ++i)
|
||||
{
|
||||
if (geom.getTexCoordArray(i))
|
||||
{
|
||||
setVertexAttrib(geom, _texCoordAlias[i], geom.getTexCoordArray(i), true, geom.getSecondaryColorBinding());
|
||||
geom.setTexCoordArray(i,0);
|
||||
}
|
||||
else
|
||||
{
|
||||
osg::notify(osg::NOTICE)<<"Found empty TexCoordArray("<<i<<")"<<std::endl;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
void setVertexAttrib(osg::Geometry& geom, const AttributeAlias& alias, osg::Array* array, bool normalize, osg::Geometry::AttributeBinding binding)
|
||||
{
|
||||
unsigned int index = alias.first;
|
||||
const std::string& name = alias.second;
|
||||
array->setName(name);
|
||||
geom.setVertexAttribArray(index, array);
|
||||
geom.setVertexAttribNormalize(index, normalize);
|
||||
geom.setVertexAttribBinding(index, binding);
|
||||
|
||||
osg::notify(osg::NOTICE)<<" vertex attrib("<<name<<", index="<<index<<", normalize="<<normalize<<" binding="<<binding<<")"<<std::endl;
|
||||
}
|
||||
|
||||
AttributeAlias _vertexAlias;
|
||||
AttributeAlias _normalAlias;
|
||||
AttributeAlias _colorAlias;
|
||||
AttributeAlias _secondaryColorAlias;
|
||||
AttributeAlias _fogCoordAlias;
|
||||
AttributeAlias _texCoordAlias[8];
|
||||
};
|
||||
|
||||
|
||||
|
||||
int main(int argc, char *argv[])
|
||||
{
|
||||
// use an ArgumentParser object to manage the program arguments.
|
||||
osg::ArgumentParser arguments(&argc,argv);
|
||||
|
||||
// construct the viewer.
|
||||
osgViewer::Viewer viewer(arguments);
|
||||
|
||||
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; }
|
||||
|
||||
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())
|
||||
{
|
||||
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 (!outputFileName.empty())
|
||||
{
|
||||
osgDB::writeNodeFile(*loadedModel, outputFileName);
|
||||
return 0;
|
||||
}
|
||||
|
||||
// add a viewport to the viewer and attach the scene graph.
|
||||
viewer.setSceneData(loadedModel.get());
|
||||
|
||||
return viewer.run();
|
||||
}
|
||||
Loading…
Reference in New Issue
Block a user