osg 纹理

#include <osg/Texture2D>
#include <osg/Geometry>
#include <osgDB/ReadFile>
#include <osgViewer/Viewer>

 

int main(int argc, char** argv)
{

osg::ref_ptr<osg::Vec3Array> vertices = new osg::Vec3Array;
vertices->push_back(osg::Vec3(-0.5f, 0.0f, -0.5f));
vertices->push_back(osg::Vec3(0.5f, 0.0f, -0.5f));
vertices->push_back(osg::Vec3(0.5f, 0.0f, 0.5f));
vertices->push_back(osg::Vec3(-0.5f, 0.0f, 0.5f));
osg::ref_ptr<osg::Vec3Array> normals = new osg::Vec3Array;
normals->push_back(osg::Vec3(0.0f, -1.0f, 0.0f));
osg::ref_ptr<osg::Vec2Array> texcoords = new osg::Vec2Array;
texcoords->push_back(osg::Vec2(0.0f, 0.0f));
texcoords->push_back(osg::Vec2(0.0f, 1.0f));
texcoords->push_back(osg::Vec2(1.0f, 1.0f));
texcoords->push_back(osg::Vec2(1.0f, 0.0f));

osg::ref_ptr<osg::Geometry> quad = new osg::Geometry;
quad->setVertexArray(vertices.get());
quad->setNormalArray(normals.get());
quad->setNormalBinding(osg::Geometry::BIND_OVERALL);
quad->setTexCoordArray(0, texcoords.get());
quad->addPrimitiveSet(new osg::DrawArrays(GL_QUADS, 0, 4));

osg::ref_ptr<osg::Texture2D> texture = new osg::Texture2D;
osg::ref_ptr<osg::Image> image =
osgDB::readImageFile("lz.rgb");
texture->setImage(image.get());

osg::ref_ptr<osg::Geode> root = new osg::Geode;
root->addDrawable(quad.get());
root->getOrCreateStateSet()->setTextureAttributeAndModes(
0, texture.get());

osgViewer::Viewer viewer;
viewer.setUpViewOnSingleScreen(0);
viewer.setSceneData(root.get());
return viewer.run();
}