FGFS-4.1/OpenSceneGraph
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Added --mip command line option which enables Maximum Intensity Projection filtering

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This commit is contained in:
Robert Osfield 2008-08-18 15:08:04 +00:00
parent 8303f03b24
commit 3cec676d98
1 changed files with 22 additions and 4 deletions
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26
examples/osgvolume/osgvolume.cpp
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@ -32,6 +32,8 @@
#include <osg/Material>
#include <osg/PrimitiveSet>
#include <osg/Endian>
#include <osg/BlendFunc>
#include <osg/BlendEquation>
#include <osgDB/Registry>
#include <osgDB/ReadFile>
@ -745,7 +747,7 @@ osg::Node* createShaderModel(osg::ref_ptr<osg::Image>& image_3d, osg::ref_ptr<os
osg::Texture::InternalFormatMode internalFormatMode,
float /*xSize*/, float /*ySize*/, float /*zSize*/,
float /*xMultiplier*/, float /*yMultiplier*/, float /*zMultiplier*/,
unsigned int /*numSlices*/=500, float /*sliceEnd*/=1.0f, float alphaFuncValue=0.02f)
unsigned int /*numSlices*/=500, float /*sliceEnd*/=1.0f, float alphaFuncValue=0.02f, bool maximumIntensityProjection = false)
{
osg::Geode* geode = new osg::Geode;
osg::StateSet* stateset = geode->getOrCreateStateSet();
@ -863,6 +865,12 @@ osg::Node* createShaderModel(osg::ref_ptr<osg::Image>& image_3d, osg::ref_ptr<os
stateset->setMode(GL_CULL_FACE, osg::StateAttribute::ON);
if (maximumIntensityProjection)
{
stateset->setAttribute(new osg::BlendFunc(osg::BlendFunc::ONE, osg::BlendFunc::ONE));
stateset->setAttribute(new osg::BlendEquation(osg::BlendEquation::RGBA_MAX));
}
{
osg::Geometry* geom = new osg::Geometry;
@ -943,7 +951,7 @@ osg::Node* createModel(osg::ref_ptr<osg::Image>& image_3d, osg::ref_ptr<osg::Ima
osg::Texture::InternalFormatMode internalFormatMode,
float xSize, float ySize, float zSize,
float xMultiplier, float yMultiplier, float zMultiplier,
unsigned int numSlices=500, float sliceEnd=1.0f, float alphaFuncValue=0.02f)
unsigned int numSlices=500, float sliceEnd=1.0f, float alphaFuncValue=0.02f, bool maximumIntensityProjection = false)
{
bool two_pass = normalmap_3d.valid() && (image_3d->getPixelFormat()==GL_RGB || image_3d->getPixelFormat()==GL_RGBA);
@ -1022,6 +1030,12 @@ osg::Node* createModel(osg::ref_ptr<osg::Image>& image_3d, osg::ref_ptr<osg::Ima
material->setDiffuse(osg::Material::FRONT_AND_BACK,osg::Vec4(1.0f,1.0f,1.0f,1.0f));
stateset->setAttributeAndModes(material);
if (maximumIntensityProjection)
{
stateset->setAttribute(new osg::BlendFunc(osg::BlendFunc::ONE, osg::BlendFunc::ONE));
stateset->setAttribute(new osg::BlendEquation(osg::BlendEquation::RGBA_MAX));
}
osg::Vec3 lightDirection(1.0f,-1.0f,1.0f);
lightDirection.normalize();
@ -1434,6 +1448,7 @@ int main( int argc, char **argv )
arguments.getApplicationUsage()->addCommandLineOption("-s <numSlices>","Number of slices to create.");
arguments.getApplicationUsage()->addCommandLineOption("--images [filenames]","Specify a stack of 2d images to build the 3d volume from.");
arguments.getApplicationUsage()->addCommandLineOption("--shader","Use OpenGL Shading Language.");
arguments.getApplicationUsage()->addCommandLineOption("--mip","Use Maximum Intensity Projection (MIP) filtering.");
arguments.getApplicationUsage()->addCommandLineOption("--xSize <size>","Relative width of rendered brick.");
arguments.getApplicationUsage()->addCommandLineOption("--ySize <size>","Relative length of rendered brick.");
arguments.getApplicationUsage()->addCommandLineOption("--zSize <size>","Relative height of rendered brick.");
@ -1482,6 +1497,9 @@ int main( int argc, char **argv )
bool createNormalMap = false;
while (arguments.read("-n")) createNormalMap=true;
bool maximumIntensityProjection = false;
while(arguments.read("--mip")) maximumIntensityProjection = true;
float xSize=1.0f, ySize=1.0f, zSize=1.0f;
while (arguments.read("--xSize",xSize)) {}
@ -1598,7 +1616,7 @@ int main( int argc, char **argv )
internalFormatMode,
xSize, ySize, zSize,
xMultiplier, yMultiplier, zMultiplier,
numSlices, sliceEnd, alphaFunc);
numSlices, sliceEnd, alphaFunc, maximumIntensityProjection);
}
else
{
@ -1606,7 +1624,7 @@ int main( int argc, char **argv )
internalFormatMode,
xSize, ySize, zSize,
xMultiplier, yMultiplier, zMultiplier,
numSlices, sliceEnd, alphaFunc);
numSlices, sliceEnd, alphaFunc, maximumIntensityProjection);
}
if (!outputFile.empty())