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POAligning osgViewer Camera with an Image
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19208024
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CreationDate
2013-10-06T10:50:18.507
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2013-10-07T21:41:13.143
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2013-10-06T10:59:48.253
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text
Body
As a precursor to render to texture, I am trying to simply align the osgViewer's camera to a texture mapped plane. This is the code I employ for the same: <pre><code>int main() { osgViewer::Viewer viewer; osg::ref_ptr<osg::Image> image = osgDB::readImageFile("path//to//file.png"); if (!image.valid()) { assert(false); return 1; } osg::ref_ptr<osg::Geometry> pictureQuad = osg::createTexturedQuadGeometry(osg::Vec3(0.f,0.f,0.f), osg::Vec3(image->s(),0.f,0.f), osg::Vec3(0.f,0.f,image->t()), 0.f, 0.f, image->s(), image->t()); osg::ref_ptr<osg::TextureRectangle> textureRect = new osg::TextureRectangle(image); textureRect->setFilter(osg::Texture::MIN_FILTER, osg::Texture::LINEAR); textureRect->setFilter(osg::Texture::MAG_FILTER, osg::Texture::LINEAR); textureRect->setWrap(osg::Texture::WRAP_S, osg::Texture::CLAMP_TO_EDGE); textureRect->setWrap(osg::Texture::WRAP_T, osg::Texture::CLAMP_TO_EDGE); pictureQuad->getOrCreateStateSet()->setTextureAttributeAndModes(0, textureRect.get(), osg::StateAttribute::ON); pictureQuad->getOrCreateStateSet()->setMode(GL_DEPTH_TEST, osg::StateAttribute::ON); osg::ref_ptr<osg::Geode> geode = new osg::Geode(); geode->setDataVariance(osg::Object::DYNAMIC); geode->addDrawable(pictureQuad.get()); osg::StateSet *state = geode->getOrCreateStateSet(); state->setMode( GL_LIGHTING, osg::StateAttribute::PROTECTED | osg::StateAttribute::OFF ); viewer.setSceneData(geode); osg::ref_ptr<osg::Camera> camera = viewer.getCamera(); while( !viewer.done() ) { camera->setReferenceFrame(osg::Transform::ABSOLUTE_RF); camera->setProjectionMatrix(osg::Matrix::ortho2D(0.f, image->s(), 0.f, image->t())); camera->setViewMatrixAsLookAt(osg::Vec3f(0.f, -100.f, 0.f), osg::Vec3f(image->s()*0.5, 0.f, image->t()*0.5f), osg::Vec3f(0.f, 0.f, 1.f)); viewer.frame(); } return 0; } </code></pre> However, the results show me a view that is completely skewed. Can someone please point out the bug in my code?
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Title
Aligning osgViewer Camera with an Image
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1. PO
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1. USbalajeerc
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1. USbalajeerc
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