The default renderer does not do any CPU-side viewport clipping nor occlusion detection. If something is not supposed to be visible, it should not be shown. Use Item::visible: false for items that should not be drawn. The primary reason for not adding such logic is that it adds additional cost which would also hurt applications that took care in behaving well. Plug in your dongle and do not install any of the software that it came with, but ensure you let plug and play finish trying to install it. If you've already installed the software drivers it came with previously, uninstall them first. If you continue to have issues please feel free to post in the troubleshooting section of our Forums. Alternative Software Where applicable (Vulkan, Direct3D), enables the graphics API implementation's debug or validation layers, if available, either on the graphics device or the instance object. For Metal on macOS, set the environment variable METAL_DEVICE_WRAPPER_TYPE=1 instead.

There are two render loop variants available: basic, and threaded. basic is single-threaded, while threaded performs scene graph rendering on a dedicated thread. Qt attempts to choose a suitable loop based on the platform and possibly the graphics drivers in use. When this is not satisfactory, or for testing purposes, the environment variable QSG_RENDER_LOOP can be used to force the usage of a given loop. To verify which render loop is in use, enable the qt.scenegraph.general logging category. Threaded Render Loop ('threaded') If you are using the x64 version try the x86 version. This can also indicate a corrupted .NET install on your PC. Attempt a .NET repair or reinstall. By default windows is used for non-threaded rendering on Windows with ANGLE, while basic is used for all other platforms when non-threaded rendering is needed.The Scene Graph - Custom QSGRenderNode example gives a demonstration of this approach. Custom Items using QPainter See the Software Guide for a big list of other compatible RTL-SDR software. Getting Started on Linux

In addition to merging compatible primitives into batches, the default renderer also tries to minimize the amount of data that needs to be sent to the GPU for every frame. The default renderer identifies subtrees which belong together and tries to put these into separate batches. Once batches are identified, they are merged, uploaded and stored in GPU memory, using Vertex Buffer Objects. Transform Nodes Note: Even in the case where every frame is unique and everything is uploaded from scratch, the default renderer will perform well.Requests choosing an adapter or physical device that uses software-based rasterization. Applicable only when the underlying API has support for enumerating adapters (for example, Direct3D or Vulkan), and is ignored otherwise. When mixing custom OpenGL rendering with the scene graph, it is important the application does not leave the OpenGL context in a state with buffers bound, attributes enabled, special values in the z-buffer or stencil-buffer or similar. Doing so can result in unpredictable behavior. qt.scenegraph.renderloop - creates a detailed log of the various stages involved in rendering. This log mode is primarily useful for developers working on Qt. The Scene Graph - Vulkan Under QML example gives an example on how to use these signals using Vulkan.

Support the text with graphic materials (figures, drawings, screenshots, diagrams, illustrations, etc.). It is also possible to override the antialiasing method used by setting the environment variable QSG_ANTIALIASING_METHOD to either vertex or msaa.

Publisher’s Note

The use of the flow coefficient offers a standard method of comparing valve capacities and sizing valves for specific applications that is widely accepted by industry. The general definition of the flow coefficient can be expanded into equations modeling the flow of liquids, gases and steam using the discharge coefficient. There seems to be a bug or misconfiguration with some versions of Windows where batch files cannot be run. One way around this is to install the RTL-SDR drivers manually. We have instructions for this here: rtl-sdr.com/manual-installation-of-sdr. Some antivirus solutions are also overly restrictive and do not allow .bat files to be run. In this case either disable or install a better antivirus, or perform a manual driver install. If you are using a RTL-SDR.com V3 dongle, view our V3 users guide to learn how to use the special features like HF direct sampling and the bias tee. If it is a newer V4 dongle, visit our V4 users guide.