FGFS-4.1/OpenSceneGraph
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Added ability to control the number of slices and the amount of the volume clipped.

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This commit is contained in:
Robert Osfield
2004-07-11 16:38:16 +00:00
parent 3f4b8e9034
commit c7647b98b8
1 changed files with 17 additions and 5 deletions
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22
examples/osgvolume/osgvolume.cpp
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@@ -420,7 +420,7 @@ osg::Image* createNormalMapTexture(osg::Image* image_3d)
osg::Node* createCube(float size,float alpha, unsigned int numSlices)
osg::Node* createCube(float size,float alpha, unsigned int numSlices, float sliceEnd=1.0f)
{
// set up the Geometry.
@@ -428,7 +428,7 @@ osg::Node* createCube(float size,float alpha, unsigned int numSlices)
float halfSize = size*0.5f;
float y = halfSize;
float dy =-size/(float)(numSlices-1);
float dy =-size/(float)(numSlices-1)*sliceEnd;
//y = -halfSize;
//dy *= 0.5;
@@ -463,7 +463,7 @@ osg::Node* createCube(float size,float alpha, unsigned int numSlices)
return billboard;
}
osg::Node* createModel(osg::ref_ptr<osg::Image>& image_3d, bool createNormalMap)
osg::Node* createModel(osg::ref_ptr<osg::Image>& image_3d, bool createNormalMap, unsigned int numSlices=500,float sliceEnd=1.0f)
{
unsigned int diffuse_unit = createNormalMap ? 1 : 0;
unsigned int bumpmap_unit = 0;
@@ -497,7 +497,7 @@ osg::Node* createModel(osg::ref_ptr<osg::Image>& image_3d, bool createNormalMap)
osg::BoundingBox bb(-0.5f,-0.5f,-0.20f,0.5f,0.5f,0.20f);
osg::ClipNode* clipnode = new osg::ClipNode;
clipnode->addChild(createCube(1.0f,0.9f, 500));
clipnode->addChild(createCube(1.0f,0.9f, numSlices,sliceEnd));
clipnode->createClipBox(bb);
{
@@ -617,6 +617,9 @@ int main( int argc, char **argv )
arguments.getApplicationUsage()->setDescription(arguments.getApplicationName()+" is the example which demonstrates use of 3D textures.");
arguments.getApplicationUsage()->setCommandLineUsage(arguments.getApplicationName()+" [options] filename ...");
arguments.getApplicationUsage()->addCommandLineOption("-h or --help","Display this information");
arguments.getApplicationUsage()->addCommandLineOption("-n","create normal map for per voxel lighting.");
arguments.getApplicationUsage()->addCommandLineOption("-s","num of slices to create.");
arguments.getApplicationUsage()->addCommandLineOption("--clip","clip volume as a ratio, 0.0 clip all, 1.0 clip none.");
// construct the viewer.
@@ -639,8 +642,17 @@ int main( int argc, char **argv )
while (arguments.read("-o",outputFile)) {}
unsigned int numSlices=500;
while (arguments.read("-s",numSlices)) {}
float sliceEnd=1.0f;
while (arguments.read("--clip",sliceEnd)) {}
bool createNormalMap = false;
while (arguments.read("-n")) createNormalMap=true;
osg::ref_ptr<osg::Image> image_3d;
@@ -687,7 +699,7 @@ int main( int argc, char **argv )
if (!image_3d) return 0;
// create a model from the images.
osg::Node* rootNode = createModel(image_3d, createNormalMap);
osg::Node* rootNode = createModel(image_3d, createNormalMap, numSlices, sliceEnd);
if (!outputFile.empty())
{