Virtual Simulation Of Optical Phenomena Based On OpenGL

With the development of science and technology,the Virtual simulation technology is gaining more and more attention in recent years,and also become very closely related to People’s daily work and life.Virtual simulation technology was used in national defense and military fields in the begining,then with the development of science and technology,virtual simulation technology has been continuous development and progress,and gradually applied to various fields,and the production had a profound impact in human life.Nowadays,virtual simulation technology not only used in military,such as military training,combat scenario simulation and so on.,it has also been used in such fields,such as aerospace,astrophysics,industrial product design,meteorological disaster forecast and so on.Virtual simulation technology is been used in the sence that difficult to implement or observed in some particular scenario simulation,so the virtual simulation technology is one of the highlights of the future interactive development of science and technology.With the development of solar-terrestrial physics in recent years,the various disciplines involved in various aspects have been more and more attention.In the future,solar-terrestrial physics in the interdisciplinary will invole more and more majors,also will be more and more important.As a branch of the aurora,the sun’s rays and the relationship between the earth and related research has also been more and more important.Therefore this thesis involved in space target optical properties,of the sun’s rays and earth and virtual simulation and visualization of the aurora in virtual simulation or as an emerging discipline solar-terrestrial physics is particularly important.In this paper,the research content mainly divided into the following three parts:1.The virtual simulation of the space target optical properties:This chapter mainly introduces the simulation on space target optical properties,optical properties of space target simulation is essentially needed according to factors such as surface texture and roughness of space target to calculate the spectral BRDF characteristic of space target,and radiation energy of space target is obtained.Space target orbit or not orbiting space target by the sun’s rays incident Angle and the space target reflect the sun’s rays are affected by the operation and observation location and different,so by transform coordinate system,the origin of the coordinates of the center of the space target as a unified achieve unified measurement units.Energy of space target projection,by determining space target depth of field to energy projection can meet only after projection canvas space target and the observation distance and so on factors to geometric scale map one to one,the resulting energy projection drawing complete space target optical properties simulation.2.The virtual simulation of the surface betweet the sun’s rays and the earth:This chapter will mainly through the sun’s rays and earth surface problem into a cylindrical light and kind of rectangular pyramid and ellipsoid surface problems,mainly for rectangular pyramid and ellipsoid surface to analyze emphatically,kind of rectangular pyramid and ellipsoid to produce the form such as the location and Angle of irradiated light factors,therefore,by constructing the Z axis and pyramid centre axis rectangular pyramid subsequently by coordinate change into any shape of rectangular pyramid,the algorithm optimization,achieve rapid coordinate change,calculate the pyramid and ellipsoid intersection,using glut utility library in visualstudio generated in the simulation.3.The virtual simulation.of the aurora:This chapter,the first to introduce the data characteristics of the aurora,the aurora in the data because the information does not include the colour so by pseudo color transition as pseudo color graphics,then by setting the RGB threshold filter color aurora morphology,secondly by different state of rendering real complex 3 d model of earth and space background,will filter out the aurora images as texture in dome yuan,using the callback function based on real-time data posted into the corresponding texture aurora,realize the simulation of the aurora and its corresponding interactions.