How to control the shape of fireworks?

At present, there are 9 categories of fireworks according to the national standard, of which 8 are fireworks products, and the other one is firecrackers. The fireworks you say here should mainly refer to professional fireworks and potted flower products. The modeling of potted flower products is mainly done by placing a number of products at angles manually, and then connecting them with quick leads to achieve fan-shaped or angular modeling. The modeling of fireworks is much more complex, currently mainly divided into two categories: product modeling and equipment modeling. Product modeling is the modeling that can be achieved by a single product, such as smiling face, heart, five-pointed star, ring and so on. This kind of modeling is mainly achieved through the modeling placement of different effects in the production process. One of the biggest problems with this kind of modeling is that when setting off and viewing, the Angle is random due to the effect parts being affected by their own tumbling, wind and other factors, and sometimes the modeling may not be clearly seen. Equipment modeling is mainly for complex such as text, numbers, special graphics, through the use of equipment modeling to achieve, such as the familiar 2008 Beijing Olympic rings, as well as big footprints such effects. Device modeling is the first to design more styling requirements of the launcher, and then targeted production of products, such products can only be customized. The advantage of this kind of modeling is that the forming rate is very high. The difficulty is that the modeling can only be displayed in the form of "point" at present, and very complex Chinese characters or English words are difficult to achieve.