Research On Unity3d Simulation Of Multi-exit Evacuation

With population growth and rapid urbanization,the number of urban residents and cities is expanding rapidly.Due to tourism,education,shopping and so on needs.The man's activities are more frequent.However,large-scale activities of the crowd can cause serious traffic jams and even stampedes,resulting in economic loss and loss of life and property.Therefore,the study of crowd evacuation is very necessary.However,if a human experiment is carried out on the evacuation of pedestrians,the experiment will be affected by a number of uncontrollable factors such as the experimenter and the environment.And in the evacuation,it may pose a threat to the safety of the experimenter.Therefore,it is limited to study the evacuation of pedestrians by human experiment.So,we use computer technology to simulate scenarios of pedestrian evacuation.And we can control the variable by setting parameters.The paper is based on the cell transmission model.The evacuation process of multi-exit is studied.The pedestrian evacuation was simulated by 3d modeling software 3ds Max and virtual engine Unity3 d.The main tasks of this thesis are as follows:1.Environment modeling: It is based on the theory of cellular transport model.I used 3ds Max to build the environment model and completed the basic modeling which includes texture mapping and rendering.Then the designed building model is imported into Unity3 d to establish a reasonable evacuation scenario.In this article,I set up a 3d building model.Moreover,the model satisfies the characteristics of indoor unobstructed,hexagonal lattice space and multi-exit.2.Simulate the evacuation process of double-exit pedestrians without obstacles.On the basis of the theory of cellular transport model,we simulate the pedestrian evacuation behavior.The results show that the simulation results show an arch phenomenon.The rationality of cellular transport model and the basic characteristics of dual exit pedestrian evacuation are verified.In addition,according to the result of simulation,we analyzed the influence of the initial density of pedestrians on the evacuation time under double-exit scene.3.Simulate the evacuation process of four-exit pedestrians without obstacles.The main purpose of this simulation experiment is to study the influence of the number of exits on pedestrian evacuation.Through the simulation experiment,we found that the number of exits increased and the pedestrian evacuation time decreased.In addition,we simulated the relation of initial density of pedestrians on evacuation time under the four-exit scene.And we compared it with the previous experiment.Then,in order to improve the evacuation efficiency of pedestrians,we simulated the pedestrian evacuation process of the adjacent principle.The selection process of pedestrian's target path is reproduced.