1. A computer-implemented method, comprising: storing firework data in a database, the firework data including firework specification data including parameters corresponding to attributes of a particular firework; using a processor to automatically construct in a user interface a visual firework simulation from the firework data, the visual firework simulation including visual elements that are also part of the user interface, the visual firework simulation depicting a sky field representing a location of a fireworks show and the spatial location of visual elements therein, the visual elements including fireworks, launch positions, and trajectories being simulated by the visual firework simulation; using the user interface to directly manipulate the visual elements of the visual firework simulation, including dragging the visual elements in the sky field of the visual firework simulation; using the processor to automatically adjust the firework data according to the user's direct manipulation of the visual elements; and using the processor to automatically update the visual firework simulation and the visual elements in real time in response to the user's direct manipulation of the visual elements and the adjustment of the firework data.