Research On Physical Simulation Technology Of Realistic Terrain Hydraulic Erosion

One of the research difficulties and hot spots of computer graphics is the realistic simulation of natural phenomena.Hydraulic erosion terrain is a natural phenomenon common in real life and virtual scenes,of which debris flow is the most typical.Due to the great harm of mudslides to people and nature,the simulation of realistic eroded terrain has important research significance in the fields of film and television special effects,disaster science education,and virtual reality.In order to realize the realistic simulation of hydraulic erosion terrain,this paper conducts a research based on the objective physical laws of nature.First,comprehensive analysis of relevant technologies,theories and research status in the study of hydraulic erosion terrain is made.Secondly,the basic theory,advantages and disadvantages of various fluid simulation methods are analyzed,and the smoothed particle hydrodynamics(SPH)method used in this paper is studied in detail.Next,in order to enhance the reality of hydraulic erosion terrain,a terrain wetting model based on Darcy’s permeability is proposed to describe the phenomenon of terrain absorbing water,generating water and water diffusion on the terrain surface,and a calculation method based on Darcy’s permeability guarantees the true physicality of moisture transmission.Then,a single type of erosion is simulated based on the existing research,and the natural hydraulic erosion phenomenon is simplified reasonably.A hydraulic erosion model including the sputtering process is proposed,and the deformation model of the projectile impact plane target in material mechanics is used to describe the erosion deformation of the terrain.In addition,in order to solve the problem that wetting factors are not considered in the erosion model,an erosion calculation method based on wetting factors is proposed.Finally,in order to verify the feasibility of the model and method proposed in this paper,the phenomenon of wetting,erosion,and the interaction of debris flow with mountains and houses are simulated respectively.The simulation results show that the method and model proposed in this paper can realistically simulate the phenomenon of wetting and erosion in the process of hydraulic erosion of terrain.