Dissertation > Excellent graduate degree dissertation topics show

Realistic Shape Modeling and Real-Time Rendering of Snow Scene

Author: ZhangZuo
Tutor: TangYong
School: Yanshan University
Course: Computer Software and Theory
Keywords: Snow simulation Particle systems Particle swarm optimization Snowflake dynamic branch growth modeling Accumulating melting snow model
CLC: TP391.9
Type: Master's thesis
Year: 2010
Downloads: 94
Quote: 0
Read: Download Dissertation

Abstract


The computer simulation of natural phenomenon has become more and more popular in the fields of computer games, movie industry, special effects, and visual simulation. The existing methods mainly focus on rendering realistic snow and can not satisfy the requirements of reality and real time in snow rendering. As a main factor in the snow environment, snowflakes have the characteristics of irregular shape, uncertain movement, and great environmental influence. Therefore, it is difficult to model the morphology of snowflakes. In addition, the influence of the external environment on the surface interaction has not been considered in the simulation process. In order to address the above problems, we will do the research based on the following areas.Firstly, we analyzed the existing natural-photorealistic rendering theory, algorithms and the scope of their application. Then, based on the diversity characteristic of snow, the diffusion limited models is presented to simulate the growth of snow dynamic branch. The sense of texture-mapping level of particle system is improved based by building three-dimensional cohesion nuclear based on fractal and particle systems. Finally, class attenuation function is proposed to simplify equations of snowflake motion.Secondly, for the irregular modeling of stochastic particle systems, the global and local optimal value of space was solved based on particle swarm optimization technology. The falling snow particle trajectories were optimized. At the same time the layout source of the particles was adjusted in order to facilitate results of the equation. The bulletin board was replaced and the real three-dimensional snowing scene rendering is established.Thirdly, in order to simulate the realistic snow scenes interactions with the external environment, we analyze the external environment influencing factors on the surface of snow to improve the traditional snow modeling only affected by temperature. Then real-time accumulating-melting snow model is presented based on temperature changing and surface types to improve the surface calculation of the net amount of snow. At the same time, dynamic mesh model was used for saving a data structure. Rendering snow scene was accelerated based on the GPU.Finally, a snow-simulation system was designed and achieved in order to validate the effectiveness of the algorithm. The algorithm presented in this paper was tested by the system. The realistic modeling was applied to the national air and space projects.This article is a meaningful research and exploration on snow realistic shape modeling and real-time rendering systems.

Related Dissertations

  1. Research on Feature Extraction and Classification of Tongue Shape and Tooth-Marked Tongue in TCM Tongue Diagnosis,TP391.41
  2. Computing Minimum Distance between Curves/Surfaces Based on PSO Algorithm,O182
  3. Active Power Filter and Its Application in Distribution Network,TN713.8
  4. Research on Fuzzy C-Mean Clustering Algorithm Based on Particle Swarm Optimization and Shuffled Frog Leaping Algorithm,TP18
  5. Research on Intrusion Detection Based on Feature Selection,TP393.08
  6. Research on the Improvements and Applications of Particle Swarm Optimization,TP18
  7. Segmentation of cDNA Microarray Image Using Fuzzy C-means Algorithm Optimized by Particle Swarm,TP391.41
  8. Research on WSN Routing Technology with Natural Computation,TN929.5
  9. Differential Evolution Algorithm and Application Research in Route Planning for Unmanned Air Vehicles,V279
  10. Based on RFID Prison Intelligent Management System Research and Implementation,TP315
  11. Research of Multi-objective Predictive Control for Model Mismatch,TP13
  12. Research of Billet Temperature Modeling and Optimization for Reheating Furnace Based on D-FNN,TG334.9
  13. The Research on the Target Localization and Tracking Based on WSN,TN929.5
  14. Research of Routing Technology for Wireless Sensor Network Based on Particle Swarm Optimization,TP212.9
  15. Reactive Power Optimization Based on Modified PSO,TP301.6
  16. Research of Two-Stage Fuzzy Material Procurement Planning Problem,TB115
  17. Control of the Water Tank Process Device Based on Particle Swarm Optimization,TP18
  18. Pattern Synthesis of Array Antenna Based on Chaos Immune Particle Swarm Optimization,TN820.12
  19. The Research of Moving Object Tracking Based on Swarm Intelligence Algorithm,TP391.41
  20. Based on intelligent algorithm research dimensional cutting stock problem,TP301.6
  21. Study on Electromagnetic Bandgap Structure with Bow-tie Units,TN454

CLC: > Industrial Technology > Automation technology,computer technology > Computing technology,computer technology > Computer applications > Information processing (information processing) > Computer simulation
© 2012 www.DissertationTopic.Net  Mobile