Shader material built-in variables The built-in variables of the three.js shader are gl_PointSize: In point rendering mode, controls the rendering pixel size of the square point area (note that this is the pixel size, not the three.js unit, so when the camera is moved, the size of the point seen on the screen remains unchanged) […]
Tag: ria
<1>, C++ implements multi-thread synchronization processing: controlling the output sequence of ABC, outputting 10 groups, mutex+condition_variable
Table of Contents need: analyze: Some code implementation: 1. Operations implemented using only flag bits: 2. For greater security, the mutex lock code is added: 3. Use it with unique_lock to make the code safer Four: Use guard lock lock_guard to work with it 5. You can also use condition variables to process, which will […]
2023 Design and development of intelligent electronic product simulation industrial conveyor belt item detection system
2023 National Vocational College Skills Competition Higher Vocational Group “GZ029 Intelligent Electronic Product Design and Development” Competition Paper 1 Title: Design and development of simulated industrial conveyor belt item detection system 1 Competition Task Play the video of the industrial conveyor belt transporting items on the smart TV, and simulate the industrial conveyor belt item […]
03 | Serialization: How are objects transmitted over the network?
The previous lecture explained how to design an extensible and backward-compatible protocol in the RPC framework. The key point is to make good use of the extension fields in the Header and the extension fields in the Payload to achieve backward compatibility through the extension fields. So following the key point of the previous lecture, […]
stm32 dual machine (f1 and f4) serial communication sends multi-byte symbol number
When I looked for serial port communication information on the Internet, most of it was communication between the host computer and the board. I rarely saw communication between two computers. I will record my thoughts in this article and hope it will be helpful. Interface connection: Select serial port one for f103, select serial port […]
Embedded Linux development—UART serial communication driver hardware programming
0. Basic preparation of serial port In embedded systems, many devices can be controlled through serial ports, such as WiFi, Bluetooth, RFID, etc., so using serial ports in embedded devices is particularly important. First, a few concepts are briefly clarified. RS232, RS485 and TTL refer to electrical level standards. Generally speaking, TTL uses 0V to […]
Stm32_Standard library_18_Serial port & Bluetooth module_Communication between mobile phone and Bluetooth module_Control LED light on and off
Control the LED lights on and off by inputting LED_ON and LED_OFF respectively wiring: The positive electrode of the LED is connected to positive electricity, and the negative electrode is connected to GPIOA_Pin1 Bluetooth module TXD is connected to GPIOA_Pin3, VCC is connected to positive power, and GND is connected to negative power. Note: USART2 […]
In embedded design, for a variable storage design with only two states, how to efficiently quantify the deviation of the tracking car…
Foreword (1) In embedded programming, we often need to store data from various sensors. Most of the time sensors, such as infrared light sensors, return data that is either 0 or 1. Therefore, only one bit is needed to store it. However, many people often use char array storage, so that only one-eighth of the […]
std::condition_variable condition variable and lock_guard, unique_lock
Used to block one thread, or block multiple threads at the same time, until another thread modifies the shared variable (condition) and notifies condition_variable. A thread that intentionally modifies a variable must Obtain std::mutex (often via std::lock_guard ) Modify while holding lock Perform notify_one or notify_all on std::condition_variable (no need to hold locks for notifications) […]
Newstar week5 WEB Unserialize Again (phar deserialization, __wakeup() bypass, phar re-signing)
Table of Contents Main parts of Phar file: 1. stub file identification 2. manifest 3. contents 4.signature topic: Main part of Phar file: 1. stub file identification The basic structure of the stub: xxx, The preceding content is not limited, but it must start with __HALT_COMPILER();?>, otherwise the phar extension will not recognize this file […]