[osg-users] CullVisitor::apply(Geode&) detected NaN,

[Rômulo Cerqueira]

Ok Robert,

this is my current code (only .cpp):


Code:

#include "ImageViewerCaptureTool.hpp"
#include <iostream>
#include <unistd.h>
#include <osgDB/WriteFile>

namespace normal_depth_map {

ImageViewerCaptureTool::ImageViewerCaptureTool(uint width, uint height) {

// initialize the hide viewer;
initializeProperties(width, height);
}

ImageViewerCaptureTool::ImageViewerCaptureTool( double fovY, double fovX, uint value, bool isHeight) {
uint width, height;

if (isHeight) {
height = value;
width = height * tan(fovX * 0.5) / tan(fovY * 0.5);
} else {
width = value;
height = width * tan(fovY * 0.5) / tan(fovX * 0.5);
}

double aspectRatio = width * 1.0 / height;

initializeProperties(width, height);
_viewer->getCamera()->setComputeNearFarMode(osg::CullSettings::DO_NOT_COMPUTE_NEAR_FAR);

_viewer->getCamera()->setProjectionMatrixAsPerspective(fovY * 180.0 / M_PI, aspectRatio, 0.1, 1000);
}

void ImageViewerCaptureTool::initializeProperties(uint width, uint height) {
// initialize the hide viewer;
_viewer = new osgViewer::Viewer;
osg::Camera *camera = this->_viewer->getCamera();
osg::ref_ptr<osg::GraphicsContext::Traits> traits = new osg::GraphicsContext::Traits;
traits->width = width;
traits->height = height;
traits->pbuffer = true;
traits->readDISPLAY();
osg::ref_ptr<osg::GraphicsContext> gc = osg::GraphicsContext::createGraphicsContext(traits.get());
camera->setGraphicsContext(gc);
camera->setDrawBuffer(GL_FRONT);
camera->setViewport(new osg::Viewport(0, 0, width, height));

// initialize the class to get the image in float data resolution
_capture = new WindowCaptureScreen(gc);
_viewer->getCamera()->setFinalDrawCallback(_capture);
}

osg::ref_ptr<osg::Image> ImageViewerCaptureTool::grabImage(osg::ref_ptr<osg::Node> node ) {

_viewer->setSceneData(node);
_viewer->frame();
return _capture->captureImage();;
}

osg::ref_ptr<osg::Image> ImageViewerCaptureTool::getDepthBuffer() {
return _capture->getDepthBuffer();
}


void ImageViewerCaptureTool::setCameraPosition( const osg::Vec3d& eye, const osg::Vec3d& center, const osg::Vec3d& up) {
_viewer->getCamera()->setViewMatrixAsLookAt(eye, center, up);
}

void ImageViewerCaptureTool::getCameraPosition( osg::Vec3d& eye,osg::Vec3d& center, osg::Vec3d& up) {
_viewer->getCamera()->getViewMatrixAsLookAt(eye, center, up);
}

void ImageViewerCaptureTool::setBackgroundColor(osg::Vec4d color) {
_viewer->getCamera()->setClearColor(color);
}

////////////////////////////////
////WindowCaptureScreen METHODS
////////////////////////////////

WindowCaptureScreen::WindowCaptureScreen(osg::ref_ptr<osg::GraphicsContext> gc) {
_mutex = new OpenThreads::Mutex();
_condition = new OpenThreads::Condition();
_image = new osg::Image();
_depth_buffer = new osg::Image();

// checks the GraficContext from the camera viewer
if (gc->getTraits()) {

GLenum pixelFormat;
if (gc->getTraits()->alpha) pixelFormat = GL_RGBA;
else pixelFormat = GL_RGB;

int width = gc->getTraits()->width;
int height = gc->getTraits()->height;

// allocates the image memory space
_image->allocateImage(width, height, 1, pixelFormat, GL_FLOAT);
_depth_buffer->allocateImage(width, height, 1, GL_DEPTH_COMPONENT, GL_FLOAT);
}
}

WindowCaptureScreen::~WindowCaptureScreen() {
delete (_condition);
delete (_mutex);
}

osg::ref_ptr<osg::Image> WindowCaptureScreen::captureImage() {

//wait to finish the capture image in call back
_condition->wait(_mutex);
return _image;
}

osg::ref_ptr<osg::Image> WindowCaptureScreen::getDepthBuffer() {
return _depth_buffer;
}


void WindowCaptureScreen::operator ()(osg::RenderInfo& renderInfo) const {
osg::ref_ptr<osg::GraphicsContext> gc = renderInfo.getState()->getGraphicsContext();
if (gc->getTraits()) {
_mutex->lock();
_image->readPixels( 0, 0, _image->s(), _image->t(), _image->getPixelFormat(), GL_FLOAT);
_depth_buffer->readPixels(0, 0, _image->s(), _image->t(), _depth_buffer->getPixelFormat(), GL_FLOAT);

//grants the access to image
_condition->signal();
_mutex->unlock();
}
}

}





... 

Thank you!

Cheers,
Rômulo

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