C++ (Cpp) ref_ptr::getOrCreateGLBufferObjectの例

コード例 #1

ファイル: osgtransformfeedback.cpp プロジェクト: yueying/osg

void SomePointsGenerator::drawImplementation( osg::RenderInfo& renderInfo ) const
{

    //get output buffer
    unsigned int contextID = renderInfo.getState()->getContextID();

    GLuint ubuff= genbuffer->getOrCreateGLBufferObject(contextID)->getGLObjectID();

    osg::GLExtensions* ext = renderInfo.getState()->get<osg::GLExtensions>();

    ext->glBindBufferBase(GL_TRANSFORM_FEEDBACK_BUFFER, 0,ubuff);

    glEnable(GL_RASTERIZER_DISCARD);

    ext->glBeginTransformFeedback(GL_POINTS);


    osg::Geometry::drawImplementation(  renderInfo );


    ext->glEndTransformFeedback();

    glDisable(GL_RASTERIZER_DISCARD);

    ext->glBindBufferBase(GL_TRANSFORM_FEEDBACK_BUFFER, 0, 0);
}