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Added support for ShadowTexture and ShadowMap to osgshadow example

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This commit is contained in:
Robert Osfield
2007-02-19 15:26:14 +00:00
parent bc0fb12d0a
commit 65ad3094a9
1 changed files with 89 additions and 157 deletions
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246
examples/osgshadow/osgshadow.cpp
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@@ -1,4 +1,6 @@
#include <osg/ArgumentParser>
#include <osg/ComputeBoundsVisitor>
#include <osg/Texture2D>
#include <osgGA/TrackballManipulator>
#include <osgGA/FlightManipulator>
@@ -14,113 +16,15 @@
#include <osgShadow/ShadowedScene>
#include <osgShadow/ShadowVolume>
#include <osgShadow/ShadowTexture>
#include <osgShadow/ShadowMap>
#include <osgShadow/ParallelSplitShadowMap>
#include <osgDB/ReadFile>
#include <osgDB/WriteFile>
#include <iostream>
class ComputeBoundingBoxVisitor : public osg::NodeVisitor
{
public:
ComputeBoundingBoxVisitor():
osg::NodeVisitor(osg::NodeVisitor::TRAVERSE_ALL_CHILDREN)
{
}
virtual void reset()
{
_matrixStack.clear();
_bb.init();
}
osg::BoundingBox& getBoundingBox() { return _bb; }
void getPolytope(osg::Polytope& polytope, float margin=0.1) const
{
float delta = _bb.radius()*margin;
polytope.add( osg::Plane(0.0, 0.0, 1.0, -(_bb.zMin()-delta)) );
polytope.add( osg::Plane(0.0, 0.0, -1.0, (_bb.zMax()+delta)) );
polytope.add( osg::Plane(1.0, 0.0, 0.0, -(_bb.xMin()-delta)) );
polytope.add( osg::Plane(-1.0, 0.0, 0.0, (_bb.xMax()+delta)) );
polytope.add( osg::Plane(0.0, 1.0, 0.0, -(_bb.yMin()-delta)) );
polytope.add( osg::Plane(0.0, -1.0, 0.0, (_bb.yMax()+delta)) );
}
void getBase(osg::Polytope& polytope, float margin=0.1) const
{
float delta = _bb.radius()*margin;
polytope.add( osg::Plane(0.0, 0.0, 1.0, -(_bb.zMin()-delta)) );
}
void apply(osg::Node& node)
{
traverse(node);
}
void apply(osg::Transform& transform)
{
osg::Matrix matrix;
if (!_matrixStack.empty()) matrix = _matrixStack.back();
transform.computeLocalToWorldMatrix(matrix,this);
pushMatrix(matrix);
traverse(transform);
popMatrix();
}
void apply(osg::Geode& geode)
{
for(unsigned int i=0; i<geode.getNumDrawables(); ++i)
{
apply(geode.getDrawable(i));
}
}
void pushMatrix(osg::Matrix& matrix)
{
_matrixStack.push_back(matrix);
}
void popMatrix()
{
_matrixStack.pop_back();
}
void apply(osg::Drawable* drawable)
{
if (_matrixStack.empty()) _bb.expandBy(drawable->getBound());
else
{
osg::Matrix& matrix = _matrixStack.back();
const osg::BoundingBox& dbb = drawable->getBound();
if (dbb.valid())
{
_bb.expandBy(dbb.corner(0) * matrix);
_bb.expandBy(dbb.corner(1) * matrix);
_bb.expandBy(dbb.corner(2) * matrix);
_bb.expandBy(dbb.corner(3) * matrix);
_bb.expandBy(dbb.corner(4) * matrix);
_bb.expandBy(dbb.corner(5) * matrix);
_bb.expandBy(dbb.corner(6) * matrix);
_bb.expandBy(dbb.corner(7) * matrix);
}
}
}
protected:
typedef std::vector<osg::Matrix> MatrixStack;
MatrixStack _matrixStack;
osg::BoundingBox _bb;
};
enum Faces
{
FRONT_FACE = 1,
@@ -287,19 +191,31 @@ protected:
};
osg::Node* createTestModel()
osg::Node* createTestModel(osg::ArgumentParser& arguments)
{
osg::Switch* sw = new osg::Switch;
sw->setEventCallback(new SwitchHandler);
if (arguments.read("-1"))
{
osg::Switch* sw = new osg::Switch;
sw->setEventCallback(new SwitchHandler);
sw->addChild(createCube(FRONT_FACE), true);
sw->addChild(createCube(FRONT_FACE | BACK_FACE), false);
sw->addChild(createCube(FRONT_FACE | BACK_FACE | LEFT_FACE), false);
sw->addChild(createCube(FRONT_FACE | BACK_FACE | LEFT_FACE | RIGHT_FACE), false);
sw->addChild(createCube(FRONT_FACE | BACK_FACE | LEFT_FACE | RIGHT_FACE | TOP_FACE), false);
sw->addChild(createCube(FRONT_FACE | BACK_FACE | LEFT_FACE | RIGHT_FACE | TOP_FACE | BOTTOM_FACE), false);
return sw;
}
else if (arguments.read("-2"))
{
return 0;
}
else /*if (arguments.read("-3"))*/
{
return 0;
}
sw->addChild(createCube(FRONT_FACE), true);
sw->addChild(createCube(FRONT_FACE | BACK_FACE), false);
sw->addChild(createCube(FRONT_FACE | BACK_FACE | LEFT_FACE), false);
sw->addChild(createCube(FRONT_FACE | BACK_FACE | LEFT_FACE | RIGHT_FACE), false);
sw->addChild(createCube(FRONT_FACE | BACK_FACE | LEFT_FACE | RIGHT_FACE | TOP_FACE), false);
sw->addChild(createCube(FRONT_FACE | BACK_FACE | LEFT_FACE | RIGHT_FACE | TOP_FACE | BOTTOM_FACE), false);
return sw;
}
int main(int argc, char** argv)
@@ -349,18 +265,10 @@ int main(int argc, char** argv)
bool updateLightPosition = true;
while (arguments.read("--noUpdate")) updateLightPosition = false;
bool createBase = false;
while (arguments.read("--base")) createBase = true;
int screenNum = -1;
while (arguments.read("--screen", screenNum)) viewer.setUpViewOnSingleScreen(screenNum);
osgShadow::ShadowVolumeGeometry::DrawMode drawMode = osgShadow::ShadowVolumeGeometry::STENCIL_TWO_SIDED;
while (arguments.read("--two-sided")) drawMode = osgShadow::ShadowVolumeGeometry::STENCIL_TWO_SIDED;
while (arguments.read("--two-pass")) drawMode = osgShadow::ShadowVolumeGeometry::STENCIL_TWO_PASS;
// set up the camera manipulators.
{
osg::ref_ptr<osgGA::KeySwitchMatrixManipulator> keyswitchManipulator = new osgGA::KeySwitchMatrixManipulator;
@@ -393,46 +301,17 @@ int main(int argc, char** argv)
// add stats
viewer.addEventHandler( new osgViewer::StatsHandler() );
// any option left unread are converted into errors to write out later.
arguments.reportRemainingOptionsAsUnrecognized();
// report any errors if they have occured when parsing the program aguments.
if (arguments.errors())
{
arguments.writeErrorMessages(std::cout);
return 1;
}
osg::ref_ptr<osg::Node> model = osgDB::readNodeFiles(arguments);
if (!model)
{
model = createTestModel();
model = createTestModel(arguments);
}
// get the bounds of the model.
ComputeBoundingBoxVisitor cbbv;
osg::ComputeBoundsVisitor cbbv;
model->accept(cbbv);
osg::BoundingBox bb = cbbv.getBoundingBox();
if (createBase)
{
osg::ref_ptr<osg::Group> newGroup = new osg::Group;
newGroup->addChild(model.get());
osg::Geode* geode = new osg::Geode;
osg::Vec3 widthVec(bb.radius(), 0.0f, 0.0f);
osg::Vec3 depthVec(0.0f, bb.radius(), 0.0f);
osg::Vec3 centerBase( (bb.xMin()+bb.xMax())*0.5f, (bb.yMin()+bb.yMax())*0.5f, bb.zMin()-bb.radius()*0.1f );
geode->addDrawable( osg::createTexturedQuadGeometry( centerBase-widthVec*1.5f-depthVec*1.5f,
widthVec*3.0f, depthVec*3.0f) );
newGroup->addChild(geode);
model = newGroup.get();
}
osg::Vec4 lightpos;
if (postionalLight)
@@ -447,15 +326,68 @@ int main(int argc, char** argv)
osg::ref_ptr<osgShadow::ShadowedScene> shadowedScene = new osgShadow::ShadowedScene;
osg::ref_ptr<osgShadow::ShadowVolume> shadowVolume = new osgShadow::ShadowVolume;
shadowedScene->setShadowTechnique(shadowVolume.get());
shadowVolume->setDynamicShadowVolumes(updateLightPosition);
shadowedScene->setRecievesShadowTraversalMask(0x1);
shadowedScene->setCastsShadowTraversalMask(0x2);
model->setNodeMask(shadowedScene->getCastsShadowTraversalMask());
if (arguments.read("--sv"))
{
osg::ref_ptr<osgShadow::ShadowVolume> sv = new osgShadow::ShadowVolume;
sv->setDynamicShadowVolumes(updateLightPosition);
while (arguments.read("--two-sided")) sv->setDrawMode(osgShadow::ShadowVolumeGeometry::STENCIL_TWO_SIDED);
while (arguments.read("--two-pass")) sv->setDrawMode(osgShadow::ShadowVolumeGeometry::STENCIL_TWO_PASS);
shadowedScene->setShadowTechnique(sv.get());
}
else if (arguments.read("--st"))
{
osg::ref_ptr<osgShadow::ShadowTexture> st = new osgShadow::ShadowTexture;
shadowedScene->setShadowTechnique(st.get());
}
else if (arguments.read("--pssm"))
{
osg::ref_ptr<osgShadow::ParallelSplitShadowMap> pssm = new osgShadow::ParallelSplitShadowMap;
shadowedScene->setShadowTechnique(pssm.get());
}
else /* if (arguments.read("--sm")) */
{
osg::ref_ptr<osgShadow::ShadowMap> sm = new osgShadow::ShadowMap;
shadowedScene->setShadowTechnique(sm.get());
}
if ( arguments.read("--base"))
{
osg::Geode* geode = new osg::Geode;
osg::Vec3 widthVec(bb.radius(), 0.0f, 0.0f);
osg::Vec3 depthVec(0.0f, bb.radius(), 0.0f);
osg::Vec3 centerBase( (bb.xMin()+bb.xMax())*0.5f, (bb.yMin()+bb.yMax())*0.5f, bb.zMin()-bb.radius()*0.1f );
geode->addDrawable( osg::createTexturedQuadGeometry( centerBase-widthVec*1.5f-depthVec*1.5f,
widthVec*3.0f, depthVec*3.0f) );
geode->setNodeMask(shadowedScene->getRecievesShadowTraversalMask());
geode->getOrCreateStateSet()->setTextureAttributeAndModes(0, new osg::Texture2D(osgDB::readImageFile("Images/lz.rgb")));
shadowedScene->addChild(geode);
}
osg::ref_ptr<osg::LightSource> ls = new osg::LightSource;
ls->getLight()->setPosition(lightpos);
ls->getLight()->setAmbient(osg::Vec4(1.0,0.0,0.0,1.0));
ls->getLight()->setDiffuse(osg::Vec4(0.0,1.0,0.0,1.0));
if ( arguments.read("--coloured-light"))
{
ls->getLight()->setAmbient(osg::Vec4(1.0,0.0,0.0,1.0));
ls->getLight()->setDiffuse(osg::Vec4(0.0,1.0,0.0,1.0));
}
else
{
ls->getLight()->setAmbient(osg::Vec4(0.2,0.2,0.2,1.0));
ls->getLight()->setDiffuse(osg::Vec4(0.8,0.8,0.8,1.0));
}
shadowedScene->addChild(model.get());
shadowedScene->addChild(ls.get());