逼真

The main contents and results of research in this paper are shown as following: It is important to built the motion model of a virtual system. As the virtual object is the submarine in this simulation system, we studied on the motion model of the submarine and gave the submarine six DOF space motion equation MultiGen-Paradigm corporation's modeling software named Creator is used, the modeling of all entities and 3D terrain in virtual ocean environment is accomplished. Then introduced the theory of Large Area Database Management and realized the Large area database management; In the course of 3D scene simulation, Vega is utilized to develop the project. The building of 3D scene is done, which includes the simulation of static and dynamic ocean surface, realization of ocean wave, simulation of bow wave and stern wake, utilization of lighting and material, simulation of cloud and fog, kinematics' modeling of submarine etc.

论文的主要研究工作和成果包括以下一些内容：建立虚拟对象的运动模型是构造一个虚拟系统的关键所在，建立的运动模型准确与否直接关系仿真对象模拟的逼真度，由于本仿真系统的虚拟对象是潜艇，所以对潜艇的运动模型进行了研究，给出潜艇空间六自由度运动方程；利用MultiGen-Paradigm公司的Creator建模软件完成虚拟海洋环境中个实体模型建模和三维海底地形模型的建模；然后介绍了大地形数据库管理(LADBM，Large Area Database Management)技术的基本原理，实现大地形数据库管理；在三维场景仿真中，使用Vega驱动软件进行软件开发，完成了三维场景空间的建立，主要包括动态和静态海洋的仿真、海浪、船首波浪和传尾尾迹的实现，灯光和材质的使用，云和雾的模拟等。

Procedures introduced smoke simulation technology, simulation technology for the entire battlefield in the smoke from the explosion effect is very useful, vivid, worthy of recommendation.

详细说明：程序介绍烟雾的模拟技术，整个技术对于模拟战场中的爆炸产生的烟雾效果非常有用，形象逼真，值得推荐。

The ana-lysis of the test results gives the fidelity degree of the simula-tor simulating the reactor physical characteristics of QinshanNPP and the overall performances of the simulator,and it alsodemonstates indirectly that the reactor possesses good self-stability.

根据结果分析，指出了该模拟器模拟秦山核电厂反应堆物理特性所能达到的逼真程度和模拟器的总体性能。间接证明了该电厂反应堆具有良好的自稳性。

In various embodiments, improved mechanisms for controlling texture sampling are provided that enable 3-D accelerator hardware to greatly increase the level of realism in rendering, including improved mechanisms for (1) motion blur;(2) generating anisotropic surface reflections (3) generating surface self-shadowing (4) ray-cast volumetric sampling (4) self-shadowed volumetric rendering and (5) self-shadowed volumetric ray-casting.

在各个实施例中，提供了用于控制纹理采样的改进的机制，它们能使3-D加速器硬件大大地提高呈现时的逼真度，包括针对下列各项的改进的机制：(1)运动模糊；(2)生成各向异性表面反射；(3)生成表面自投阴影；(4)光线投射容量采样；(4)自投阴影容量呈现和(5)自投阴影容量光线投射。

In order to draw a photorealistic surface, Bidirectional Texture Functions, a 6D texture function which extends Bidirectional Reflectance Distribution Function to include the self-shadowing, self-occlusion and inter-reflection effects, has been mentioned frequently in recent years. Its main drawback is its massive data size. To solve this, Spatial Bidirectional Reflectance Function techniques compress BTFs into reflectance model parameters. However, SBRDF cannot producethe self-shadowing and self-occlusion effects in real-world surface geometry. This work is aimed to this drawback. I find how self-shadowing and self-occlusion affect the surface by additional physical-based analysis. And I rely on two physical phenomena to divide self-shadowing and self-occlusion into two independent effects. First, self-shadowing is view independent. Second, self-occlusion is independent of lighting direction changes. After these analyses, I use SBRDF and additional self-shadowing and self-occlusion I found to render a photorealistic surface as non-compressed BTFs doing.

为了把物体表面呈现的更真实，六维函数BTFs ( Bidirectional Texture Functions)目前已经被使用的相当频繁，但BTFs的资料量实在太大而没办法直接使用，为了解决资料庞大的问题，传统的SBRDF以逼近光反射模型参数，来达到资料压缩的效果，但是SBRDF对於表面的凹凸所产生的阴影及遮蔽，不能达到逼真的呈现，为了改善这个问题，我们选择从物理方面，找出资料中阴影和遮蔽等属於表面几何的资料并去除，使参数更正确，同时利用两个物理现象去区分阴影及遮蔽为两个互不干涉资料，第一是阴影不会因视角不同而改变，第二是遮蔽不因光线方向不同而改变，经过这些分析，我可以利用SBRDF加上附加的阴影及遮蔽两种独立的效应，来达到彷佛跟未压缩过的BTFs一样的真实绘图。

If god appeared to you in a series of vivid and moving dreams and told you to leave everything behind, travel alone to the red sea and become a fisherman, what would you do?

如果上帝出现在一系列逼真的梦境里告诉你抛弃一切，独自一人去红海做渔夫，你会怎么做？

Virtual entertainment sites let you chat, dress-up, feed the dog and shop in a way that feels real.

虚拟娱乐网站可以为你提供一个聊天、购物、秀装扮以及养宠物的逼真平台。

Snowboard-Hero - Get ready to challenge real Snowboarding pros on the slopes, in the Fun Park and off-piste!

此款保龄球游戏以其丰富的创新和逼真的效果彻底改变了娱乐体验！

The theoretical research on probability theory and random process and the practical applications show that the class normal distribution is most widely distributed in actual natural phenomenon and social phenomenon, cloud model is a powerful tool in simulating class normal distribution, controlling particle generation and particles attribute alternation of the particles system based on the cloud mode will simulate the natural rain more realistically, and has more fidelity effect.

概率论与随机过程的理论研究和实际应用表明，类正态分布在实际的自然现象与社会现象中分布最为广泛，云模型是模拟生成类正态分布的有力工具，基于云模型控制粒子系统的粒子生成、属性的改变能够更真实地模拟自然雨的生成，具有更逼真的效果。

The monsters were voiced by an all-star cast and enhanced through digital effects to make the facial features seem more lifelike.

这些怪物的配音是全明星阵容，并通过数字效果使面部特征看起来更加逼真。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。