Digital fireworks bloomed at the opening ceremony of the 19th Asian Games in Hangzhou. The dazzling fireworks are often a highlight of the opening and closing ceremonies of major sports events. On September 23rd, at the opening ceremony of the 19th Asian Games in Hangzhou (hereinafter referred to as the Hangzhou Asian Games), the "fireworks" on the central three-dimensional perspective screen and ground screen were dazzling, with the roaring explosion mixed with the applause and shouting of the audience, but there was no trace of smoke and dust. The opening ceremony of the Hangzhou Asian Games has cancelled real fireworks performances and replaced them with digital fireworks. Although physical fireworks are not set off throughout the entire process, the audience can still see the dazzling fireworks. The digital fireworks have left a deep impression on the media journalist from Mongolia, Mapamen. He said, "Many of people's emotions are generated while watching fireworks. Today is the first time I have seen digital fireworks, and they are very eye-catching when they bloom." So, what is digital fireworks? How was it made? The reporter from Science and Technology Daily interviewed relevant experts on this matter. High technology makes digital fireworks more realistic. Compared to traditional physical fireworks, digital fireworks have advantages such as environmental friendliness, low cost, flexibility, diversity, and safety. At the opening ceremony of the Hangzhou Asian Games, digital fireworks were widely used in fireworks performances. Various computer digital technologies (hereinafter referred to as digital technologies) are used to create digital fireworks. Simply put, digital fireworks are electronic fireworks that use digital technology to 'ignite'. Yan Huaizhi, a member of the Information and Communication Technology Committee of the Ministry of Industry and Information Technology and the director of the Institute of Computer Network Countermeasures at Beijing Institute of Technology, introduced in an interview with a reporter from Science and Technology Daily. Specifically, technicians will use mathematical models, simulation algorithms, graphic rendering, particle systems, and randomness generation Numerous digital technologies such as physical simulation and interactive control. Yan Huaizhi explained that in the production process of digital fireworks, the first step is to use computer graphics technology to create a 3D model of the fireworks. These models not only include the shape of the fireworks, but also their color, texture, and explosive effects; Afterwards, physical simulation techniques were used to simulate the explosion process of fireworks, including the movement, collision, and energy dissipation of fireworks particles. In order to make digital fireworks visually more realistic, during the production process, workers also need to use real-time rendering technology to present 3D models and physical simulation results in real-time in the form of images. This rendering technique requires the use of efficient rendering engines such as Unity or UnrealEngine. These rendering engines can provide real-time rendering of images and meet complex physical simulation requirements. Finally, in order to achieve the synthesis of digital fireworks and live video images, augmented reality (AR) technology is also needed. Through augmented reality technology, staff can synthesize images of digital fireworks with live video images, making the digital fireworks look more realistic.
Edit：Hu Sen Ming Responsible editor：Li Xi
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