Special Effects Algorithms In A Virtual Scene To Achieve

The simulation of various natural phenomena is one of the important research fields in computer graphics. In this paper, we describe efficient methods for creating realistic images of such natural phenomena like fire, clouds, terrain trees and smoke. These phenomena have the common feature that they are consist of the effects of small particles. Particle systems model an object as a cloud of primitive particles that define its volume. Over a period of time, particles are generated into the system, move and change form within the system, and die from the system. The resulting model is able to represent motion, changes of form, and dynamics that are not possible with classical surface-based representations. Stochastic processes are used to generate and control the many particles within a particle system. The potential applications are endless. Particle systems can produce so much irregular, three-dimensional detail that exact shading and visible surface calculations become infeasible. To enhance the visual richness and realism of computer-generated images, we combine particle and procedural texture techniques. The Perlin noise and cellular automation are used for generating realistic and natural details. Our algorithms run in real-time for reasonable particle sizes in both two and three dimensions on standard PC hardware. Realistic images are then created using one of the standard graphics APIs, OpenGL. This makes it possible to utilize graphics hardware, resulting in fast image generation.