[osg-users] Problem to load images

[Robert Osfield]

HI Rômulo,

I can't spot anything specific in your code that might cause a problem
loading images.  It could be the paths to the files, personally I'd not
hard-wire the filenames even for early code. The other thing is perhaps
there is something odd about you are building/linking the OSG.

The best I can recommend is to create a small example code that you can
test just the image loading code, once this is works compare it to the rest
of your application.  The OSG examples might be something to use as a base.

Robert.

On 16 August 2017 at 02:58, Rômulo Cerqueira <romulogcerqueira at gmail.com>
wrote:

> Hi Robert,
>
> thanks for your reply. Follows my code:
>
> Code:
>
> #define BOOST_TEST_MODULE "NormalMapping_test"
> #include <boost/test/unit_test.hpp>
>
> // OpenSceneGraph includes
> #include <osg/Geode>
> #include <osg/Group>
> #include <osg/Image>
> #include <osg/ShapeDrawable>
> #include <osg/StateSet>
> #include <osg/Texture2D>
> #include <osgDB/ReadFile>
> #include <osgViewer/Viewer>
>
> // Rock includes
> #include <normal_depth_map/NormalDepthMap.hpp>
> #include <normal_depth_map/ImageViewerCaptureTool.hpp>
>
> // OpenCV includes
> #include <opencv2/core/core.hpp>
> #include <opencv2/highgui/highgui.hpp>
> #include <opencv2/imgproc/imgproc.hpp>
> #include <opencv2/contrib/contrib.hpp>
>
> // C++ includes
> #include <iostream>
>
> using namespace normal_depth_map;
>
> BOOST_AUTO_TEST_SUITE(NormalMapping)
>
>
> // add one object to scene (sphere)
> void addSimpleObject(osg::ref_ptr<osg::Group> root) {
>     osg::ref_ptr<osg::Geode> geode = new osg::Geode();
>     geode->addDrawable(new osg::ShapeDrawable(new
> osg::Sphere(osg::Vec3(0,0,-14), 5)));
>     root->addChild(geode);
>     root->getChild(0)->asGeode()->addDrawable(geode->getDrawable(0));
> }
>
> // define texture attributes
> osg::ref_ptr<osg::StateSet> insertNormalMapTexture(osg::ref_ptr<osg::Image>
> diffuseImage, osg::ref_ptr<osg::Image> normalImage) {
>     osg::ref_ptr<osg::Texture2D> diffuse = new osg::Texture2D();
>     osg::ref_ptr<osg::Texture2D> normal = new osg::Texture2D();
>
>     diffuse->setImage(diffuseImage);
>     diffuse->setDataVariance(osg::Object::DYNAMIC);
>     diffuse->setFilter(osg::Texture::MIN_FILTER,
> osg::Texture::LINEAR_MIPMAP_LINEAR);
>     diffuse->setFilter(osg::Texture::MAG_FILTER, osg::Texture::LINEAR);
>     diffuse->setWrap(osg::Texture::WRAP_S, osg::Texture::REPEAT);
>     diffuse->setWrap(osg::Texture::WRAP_T, osg::Texture::REPEAT);
>     diffuse->setResizeNonPowerOfTwoHint(false);
>     diffuse->setMaxAnisotropy(8.0f);
>
>     normal->setImage(normalImage);
>     normal->setDataVariance(osg::Object::DYNAMIC);
>     normal->setFilter(osg::Texture::MIN_FILTER,
> osg::Texture::LINEAR_MIPMAP_LINEAR);
>     normal->setFilter(osg::Texture::MAG_FILTER, osg::Texture::LINEAR);
>     normal->setWrap(osg::Texture::WRAP_S, osg::Texture::REPEAT);
>     normal->setWrap(osg::Texture::WRAP_T, osg::Texture::REPEAT);
>     normal->setResizeNonPowerOfTwoHint(false);
>     normal->setMaxAnisotropy(8.0f);
>
>     osg::ref_ptr<osg::StateSet> normalState = new osg::StateSet();
>     normalState->setTextureAttributeAndModes(TEXTURE_UNIT_DIFFUSE,
> diffuse, osg::StateAttribute::ON);
>     normalState->setTextureAttributeAndModes(TEXTURE_UNIT_NORMAL, normal,
> osg::StateAttribute::ON);
>     return normalState;
> }
>
> // get texture files
> void loadTextures(osg::ref_ptr<osg::Group> root, TextureImages textureId)
> {
>     osg::ref_ptr<osg::Image> diffuseImage = osgDB::readImageFile("/home/
> romulo/dev.bir.master/simulation/normal_depth_map/
> textures/gray_texture_d.jpg");
>     osg::ref_ptr<osg::Image> normalImage = osgDB::readImageFile("/home/
> romulo/dev.bir.master/simulation/normal_depth_map/
> textures/gray_texture_n.jpg");
>
>     // texture properties
>     osg::ref_ptr<osg::Geode> geode = new osg::Geode();
>     geode->setStateSet(insertNormalMapTexture(diffuseImage, normalImage));
>     root->addChild(geode);
> }
>
> // create scene with normal mapping and one object
> osg::ref_ptr<osg::Group> createNormalMapSimpleScene() {
>     osg::ref_ptr<osg::Group> root = new osg::Group();
>     osg::ref_ptr<osg::StateSet> stateset = new osg::StateSet();
>     stateset->addUniform(new osg::Uniform("diffuseTexture",
> TEXTURE_UNIT_DIFFUSE));
>     stateset->addUniform(new osg::Uniform("normalTexture",
> TEXTURE_UNIT_NORMAL));
>     stateset->setDataVariance(osg::Object::STATIC);
>     root->setStateSet(stateset);
>
>     loadTextures(root, TEXTURE_GRAY);
>     addSimpleObject(root);
>     return root;
> }
>
> // compute the normal depth map for a osg scene
> cv::Mat computeNormalDepthMap(osg::ref_ptr<osg::Group> root, float
> maxRange, float fovX, float fovY) {
>     uint height = 500;
>
>     // normal depth map
>     NormalDepthMap normalDepthMap(maxRange, fovX * 0.5, fovY * 0.5);
>     ImageViewerCaptureTool capture(fovY, fovX, height);
>     capture.setBackgroundColor(osg::Vec4d(0, 0, 0, 0));
>     normalDepthMap.addNodeChild(root);
>
>     // grab scene
>     osg::ref_ptr<osg::Image> osgImage = capture.grabImage(normalDepthMap.
> getNormalDepthMapNode());
>     osg::ref_ptr<osg::Image> osgDepth = capture.getDepthBuffer();
>     cv::Mat cvImage = cv::Mat(osgImage->t(), osgImage->s(), CV_32FC3,
> osgImage->data());
>     cv::Mat cvDepth = cv::Mat(osgDepth->t(), osgDepth->s(), CV_32FC1,
> osgDepth->data());
>     cvDepth = cvDepth.mul( cv::Mat1f(cvDepth < 1) / 255);
>
>     std::vector<cv::Mat> channels;
>     cv::split(cvImage, channels);
>     channels[1] = cvDepth;
>     cv::merge(channels, cvImage);
>     cv::cvtColor(cvImage, cvImage, cv::COLOR_RGB2BGR);
>     cv::flip(cvImage, cvImage, 0);
>
>     return cvImage.clone();
> }
>
> BOOST_AUTO_TEST_CASE(differentNormalMaps_TestCase) {
>     float maxRange = 20.0f;
>     float fovX = M_PI / 3;  // 60 degrees
>     float fovY = M_PI / 3;  // 60 degrees
>
>     osg::ref_ptr<osg::Group> normalRoot = createNormalMapSimpleScene();
>
>     cv::Mat cvNormal = computeNormalDepthMap(normalRoot, maxRange, fovX,
> fovY);
>
>     plotSonarTest(cvNormal, maxRange, fovX * 0.5);
> }
>
> BOOST_AUTO_TEST_SUITE_END()
>
>
>
>
>
> ...
>
> Thank you!
>
> Cheers,
> Rômulo
>
> ------------------
> Read this topic online here:
> http://forum.openscenegraph.org/viewtopic.php?p=71422#71422
>
>
>
>
>
> _______________________________________________
> osg-users mailing list
> osg-users at lists.openscenegraph.org
> http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.openscenegraph.org/pipermail/osg-users-openscenegraph.org/attachments/20170816/bdd3f110/attachment.htm>