FGFS-4.1/OpenSceneGraph
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Added basic set up of the RTT camera.

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This commit is contained in:
Robert Osfield
2007-02-17 17:16:13 +00:00
parent 291d687cc9
commit 9d1e6e107c
1 changed files with 51 additions and 8 deletions
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59
src/osgShadow/ShadowTexture.cpp
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@@ -14,6 +14,7 @@
#include <osgShadow/ShadowTexture>
#include <osgShadow/ShadowedScene>
#include <osg/Notify>
#include <osg/ComputeBoundsVisitor>
#include <osg/io_utils>
using namespace osgShadow;
@@ -29,14 +30,7 @@ class CameraCullCallback : public osg::NodeCallback
virtual void operator()(osg::Node*, osg::NodeVisitor* nv)
{
unsigned int traversalMask = nv->getTraversalMask();
nv->setTraversalMask( traversalMask &
_shadowTexture->getShadowedScene()->getCastsShadowTraversalMask() );
_shadowTexture->getShadowedScene()->osg::Group::traverse(*nv);
nv->setTraversalMask( traversalMask );
}
protected:
@@ -102,6 +96,7 @@ void ShadowTexture::init()
osg::StateSet* stateset = _camera->getOrCreateStateSet();
stateset->setAttribute(_material.get(),osg::StateAttribute::OVERRIDE);
}
{
@@ -111,6 +106,8 @@ void ShadowTexture::init()
_stateset->setTextureMode(_textureUnit,GL_TEXTURE_GEN_T,osg::StateAttribute::ON);
_stateset->setTextureMode(_textureUnit,GL_TEXTURE_GEN_R,osg::StateAttribute::ON);
_stateset->setTextureMode(_textureUnit,GL_TEXTURE_GEN_Q,osg::StateAttribute::ON);
_texgen = new osg::TexGen;
}
_dirty = false;
@@ -173,9 +170,55 @@ void ShadowTexture::cull(osgUtil::CullVisitor& cv)
}
}
osg::Matrix eyeToWorld;
eyeToWorld.invert(cv.getModelViewMatrix());
lightpos = lightpos * eyeToWorld;
if (selectLight)
{
osg::notify(osg::NOTICE)<<"Selected light "<<lightpos<<std::endl;
// get the bounds of the model.
osg::ComputeBoundsVisitor cbbv(osg::NodeVisitor::TRAVERSE_ACTIVE_CHILDREN);
cbbv.setTraversalMask(getShadowedScene()->getCastsShadowTraversalMask());
_shadowedScene->osg::Group::traverse(cbbv);
osg::BoundingBox bb = cbbv.getBoundingBox();
if (lightpos[3]!=0.0)
{
osg::Vec3 position(lightpos.x(), lightpos.y(), lightpos.z());
float centerDistance = (position-bb.center()).length();
float znear = centerDistance-bb.radius();
float zfar = centerDistance+bb.radius();
float zNearRatio = 0.001f;
if (znear<zfar*zNearRatio) znear = zfar*zNearRatio;
float top = (bb.radius()/centerDistance)*znear;
float right = top;
_camera->setReferenceFrame(osg::Camera::ABSOLUTE_RF);
_camera->setProjectionMatrixAsFrustum(-right,right,-top,top,znear,zfar);
_camera->setViewMatrixAsLookAt(position,bb.center(),osg::Vec3(0.0f,1.0f,0.0f));
// compute the matrix which takes a vertex from local coords into tex coords
// will use this later to specify osg::TexGen..
osg::Matrix MVPT = _camera->getViewMatrix() *
_camera->getProjectionMatrix() *
osg::Matrix::translate(1.0,1.0,1.0) *
osg::Matrix::scale(0.5f,0.5f,0.5f);
_texgen->setMode(osg::TexGen::EYE_LINEAR);
_texgen->setPlanesFromMatrix(MVPT);
}
cv.setTraversalMask( traversalMask &
getShadowedScene()->getCastsShadowTraversalMask() );
// do RTT camera traversal
_camera->accept(cv);