Hi all,
I'm working on inserting the shadow capability to our app.
for learning purpose i created a small and simple program.
if i don't add camera to the scene - i do see the shadow, but when I add a
camera to the scene - i don't .
I'm sure i'm missing something and/or doing something wrong but I don’t know
what :(
I attached cpp with my code...
PLEASE HELP :)
Thanks a lot!
Cheers,
Hadas
------------------
Read this topic online here:
http://forum.openscenegraph.org/viewtopic.php?p=13760#13760
// ShadowTest.cpp : Defines the entry point for the console application.
//
#include "stdafx.h"
#include <conio.h>
#include <ctype.h>
#include <osg/ArgumentParser>
#include <osg/Group>
#include <osg/Geode>
#include <osg/Geometry>
#include <osgDB/ReadFile>
#include <osgGA/TrackballManipulator>
#include <osgViewer/Viewer>
#include <osg/CameraNode>
#include <osgShadow/ShadowedScene>
#include <osgShadow/ShadowMap>
#include <osgShadow/ShadowTexture>
#include <osg/LightSource>
#include <osg/Material>
static int ReceivesShadowTraversalMask = 0x1;
static int CastsShadowTraversalMask = 0x2;
int _tmain(int argc, char* argv[])
{
//================================================
// application standard initialization
//------------------------------------
// use an ArgumentParser object to manage the program arguments.
osg::ArgumentParser arguments(&argc,argv);
// set up the usage document, in case we need to print out how to use
this program.
arguments.getApplicationUsage()->setDescription(
arguments.getApplicationName()+ ",,,");
arguments.getApplicationUsage()->addCommandLineOption( "-h or
--help","Display this information");
arguments.getApplicationUsage()->setCommandLineUsage(
arguments.getApplicationName()+ " [options] filename ...");
// construct the viewer.
osgViewer::Viewer viewer(arguments);
// if user request help write it out to cout.
if (arguments.read("-h") || arguments.read("--help"))
{
return 1;
}
// any option left unread are converted into errors to write out later.
arguments.reportRemainingOptionsAsUnrecognized();
// report any errors if they have occurred when parsing the program
arguments.
if (arguments.errors())
{
return 1;
}
//================================================
// scene objects
osg::Group* root = new osg::Group;
osg::Node* modelNode = NULL;
std::string FilePathName = "C:\\OSG\\OpenSceneGraph-Data\\cessna.osg";
modelNode =
(osg::Group*)osgDB::readNodeFile((std::string)FilePathName);
osg::Node * m2 =
(osg::Group*)osgDB::readNodeFile("C:\\OSG\\OpenSceneGraph-Data\\cow.osg");
osg::Matrix mat;
mat.setTrans(osg::Vec3(0,0,15));
osg::MatrixTransform *ModelTransform = new osg::MatrixTransform();
ModelTransform->setMatrix(mat);
ModelTransform->addChild(m2);
root->addChild(ModelTransform);
root->addChild(modelNode);
//================================================
//shadow
osgShadow::ShadowedScene * shadowedScene = new osgShadow::ShadowedScene;
//osgShadow::ShadowMap * sm = new
osgShadow::ShadowMap;
//shadowedScene->setShadowTechnique(sm);
osgShadow::ShadowTexture * st = new osgShadow::ShadowTexture;
shadowedScene->setShadowTechnique(st);
osg::Material * mtrl = new osg::Material;
mtrl->setColorMode(osg::Material::DIFFUSE);
mtrl->setAmbient(osg::Material::FRONT_AND_BACK, osg::Vec4(0, 0, 0, 1));
mtrl->setSpecular(osg::Material::FRONT_AND_BACK, osg::Vec4(1, 1, 1, 1));
mtrl->setShininess(osg::Material::FRONT_AND_BACK, 64);
root->getOrCreateStateSet()->setAttributeAndModes(mtrl,
osg::StateAttribute::ON);
m2->setNodeMask(CastsShadowTraversalMask);
modelNode->setNodeMask(ReceivesShadowTraversalMask);
shadowedScene->setReceivesShadowTraversalMask(ReceivesShadowTraversalMask);
shadowedScene->setCastsShadowTraversalMask(CastsShadowTraversalMask);
// light source
osg::Vec3 lightPosition(0,0,30);
osg::LightSource* ls = new osg::LightSource;
ls->getLight()->setPosition(osg::Vec4(lightPosition,1));
ls->getLight()->setAmbient(osg::Vec4(0.2,0.2,0.2,1.0));
ls->getLight()->setDiffuse(osg::Vec4(0.6,0.6,0.6,1.0));
//shadowedScene->setReceivesShadowTraversalMask(1);
//shadowedScene->setCastsShadowTraversalMask(1);
// camera
osg::Camera * camera_node = NULL;
/**/
camera_node = new osg::Camera;
// inherit the main cameras view
camera_node->setReferenceFrame(osg::Transform::ABSOLUTE_RF);
camera_node->setViewMatrix(osg::Matrix::identity());
camera_node->setProjectionMatrixAsOrtho2D(-40,40,-40,40);
// set the camera to render before the main camera.
camera_node->setRenderOrder(osg::CameraNode::NESTED_RENDER);
// tell the camera to use OpenGL frame buffer object where
supported.
camera_node->setRenderTargetImplementation(osg::CameraNode::FRAME_BUFFER_OBJECT);
/**/
//------------------------------------------------------
if(camera_node != NULL)
{
camera_node->addChild(root);
camera_node->addChild(ls);
shadowedScene->addChild(camera_node);
viewer.setSceneData( shadowedScene);
}
else
{
shadowedScene->addChild(root);
shadowedScene->addChild(ls);
// add the scene to the viewer
viewer.setSceneData( shadowedScene)
}
// create the window and run the threads.
//---------------------------------------
return viewer.run();
}
// ShadowTest.cpp : Defines the entry point for the console application.
//
#include "stdafx.h"
#include <conio.h>
#include <ctype.h>
#include <osg/ArgumentParser>
#include <osg/Group>
#include <osg/Geode>
#include <osg/Geometry>
#include <osgDB/ReadFile>
#include <osgGA/TrackballManipulator>
#include <osgViewer/Viewer>
#include <osg/CameraNode>
#include <osgShadow/ShadowedScene>
#include <osgShadow/ShadowMap>
#include <osgShadow/ShadowTexture>
#include <osg/LightSource>
#include <osg/Material>
static int ReceivesShadowTraversalMask = 0x1;
static int CastsShadowTraversalMask = 0x2;
int _tmain(int argc, char* argv[])
{
//================================================
// application standard initialization
//------------------------------------
// use an ArgumentParser object to manage the program arguments.
osg::ArgumentParser arguments(&argc,argv);
// set up the usage document, in case we need to print out how to use
this program.
arguments.getApplicationUsage()->setDescription(
arguments.getApplicationName()+ ",,,");
arguments.getApplicationUsage()->addCommandLineOption( "-h or
--help","Display this information");
arguments.getApplicationUsage()->setCommandLineUsage(
arguments.getApplicationName()+ " [options] filename ...");
// construct the viewer.
osgViewer::Viewer viewer(arguments);
// if user request help write it out to cout.
if (arguments.read("-h") || arguments.read("--help"))
{
return 1;
}
// any option left unread are converted into errors to write out later.
arguments.reportRemainingOptionsAsUnrecognized();
// report any errors if they have occurred when parsing the program
arguments.
if (arguments.errors())
{
return 1;
}
//================================================
// scene objects
osg::Group* root = new osg::Group;
osg::Node* modelNode = NULL;
std::string FilePathName = "C:\\OSG\\OpenSceneGraph-Data\\cessna.osg";
modelNode =
(osg::Group*)osgDB::readNodeFile((std::string)FilePathName);
osg::Node * m2 =
(osg::Group*)osgDB::readNodeFile("C:\\OSG\\OpenSceneGraph-Data\\cow.osg");
osg::Matrix mat;
mat.setTrans(osg::Vec3(0,0,15));
osg::MatrixTransform *ModelTransform = new osg::MatrixTransform();
ModelTransform->setMatrix(mat);
ModelTransform->addChild(m2);
root->addChild(ModelTransform);
root->addChild(modelNode);
//================================================
//shadow
osgShadow::ShadowedScene * shadowedScene = new osgShadow::ShadowedScene;
//osgShadow::ShadowMap * sm = new
osgShadow::ShadowMap;
//shadowedScene->setShadowTechnique(sm);
osgShadow::ShadowTexture * st = new osgShadow::ShadowTexture;
shadowedScene->setShadowTechnique(st);
osg::Material * mtrl = new osg::Material;
mtrl->setColorMode(osg::Material::DIFFUSE);
mtrl->setAmbient(osg::Material::FRONT_AND_BACK, osg::Vec4(0, 0, 0, 1));
mtrl->setSpecular(osg::Material::FRONT_AND_BACK, osg::Vec4(1, 1, 1, 1));
mtrl->setShininess(osg::Material::FRONT_AND_BACK, 64);
root->getOrCreateStateSet()->setAttributeAndModes(mtrl,
osg::StateAttribute::ON);
m2->setNodeMask(CastsShadowTraversalMask);
modelNode->setNodeMask(ReceivesShadowTraversalMask);
shadowedScene->setReceivesShadowTraversalMask(ReceivesShadowTraversalMask);
shadowedScene->setCastsShadowTraversalMask(CastsShadowTraversalMask);
// light source
osg::Vec3 lightPosition(0,0,30);
osg::LightSource* ls = new osg::LightSource;
ls->getLight()->setPosition(osg::Vec4(lightPosition,1));
ls->getLight()->setAmbient(osg::Vec4(0.2,0.2,0.2,1.0));
ls->getLight()->setDiffuse(osg::Vec4(0.6,0.6,0.6,1.0));
//shadowedScene->setReceivesShadowTraversalMask(1);
//shadowedScene->setCastsShadowTraversalMask(1);
// camera
osg::Camera * camera_node = NULL;
/**/
camera_node = new osg::Camera;
// inherit the main cameras view
camera_node->setReferenceFrame(osg::Transform::ABSOLUTE_RF);
camera_node->setViewMatrix(osg::Matrix::identity());
camera_node->setProjectionMatrixAsOrtho2D(-40,40,-40,40);
// set the camera to render before the main camera.
camera_node->setRenderOrder(osg::CameraNode::NESTED_RENDER);
// tell the camera to use OpenGL frame buffer object where
supported.
camera_node->setRenderTargetImplementation(osg::CameraNode::FRAME_BUFFER_OBJECT);
/**/
//------------------------------------------------------
if(camera_node != NULL)
{
camera_node->addChild(root);
camera_node->addChild(ls);
shadowedScene->addChild(camera_node);
viewer.setSceneData( shadowedScene);
}
else
{
shadowedScene->addChild(root);
shadowedScene->addChild(ls);
// add the scene to the viewer
viewer.setSceneData( shadowedScene)
}
// create the window and run the threads.
//---------------------------------------
return viewer.run();
}
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