| To simulate the status of development and spreading of forest fire in the virtual 3-D environment and utilize the 3-D engine to carry out a phantom study. First, the definition, status, neighbourhood and connutation rule function were described; then the weight formula of fire spreading formula was obtained at eight directions through obtaining the weight of the parameters of forest fire spreading formula at eight neighbourhood directions. The Unity3D 3D engineer was utilized to establish a field 3-D topography; the flame warehouse and smoke warehouse applicable to different conditions were established through constantly adjusting the parameters of self-containing particle parameter; the simulated spreading of forest fire at the 3-D environment can be achieved after the meteorological factors were input. Finally, a comparison was made between the data obtained from the field ignition experiment and the simulation effects, and the conclusion is that the simulation effects are close to the field ignition experiment, and the simulation effects conform to the requirements. |