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A Study on Visual Simulation of Creatures in the Sky

空中生物视觉模拟研究

基本信息

批准号：
12680323
负责人：
MURAOKA Kazunobu
金额：
$ 2.43万
依托单位：
Iwate University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
2000
资助国家：
日本
起止时间：
2000 至 2001
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-12680323/
关键词：
computer graphics visual simulation virtual reality real-time flying creature flapping bird butterfly

项目摘要

We built a flight model of a fluttering butterfly based on a fundamental flapping flight model that was based on a quasi-stationary state. With this model, we confirmed in a simulation test that the flight characteristics of some types of butterflies could be reproduced. In addition, we expanded this flight model to that of a bird flapping its wings, in which the flight characteristics of a bird can be reproduced.For flight control, we developed a method of setting control points in space. In this method, the control ol the vertical and lateral directions of a flying creature, of a bank, and of the frequency of wing flapping enables a simulated flying creature to pass control points in a specified order.As a method of representing a flock of birds, we developed a follow-the-leader type model and a Boid type model. In the former type, a flock is organized such that the rest of the flock follows a leader. The latter type incorporates a flock representation called a "Boid." In the Boid method, movement vectors for the movement of individuals are created to act on each member of the flock directly. However, the proposed model cannot actually enable a movement vector to act directly on each bird since birds only fly with the force they generate by flapping their wings. Therefore, we set dynamic control points for each bird, and let a movement vector act on the control points. This method enabled the display of a flock of about twelve birds in real time on a PC equipped with a Pentium 4 running at 1.7 GHz and a GeForce 3 video card.

我们基于准静止状态的基本扑动飞行模型构建了扑动蝴蝶的飞行模型。通过这个模型，我们在模拟测试中证实可以再现某些类型蝴蝶的飞行特性。此外，我们将这个飞行模型扩展为鸟拍打翅膀的模型，可以再现鸟的飞行特性。对于飞行控制，我们开发了一种在空间设置控制点的方法。在该方法中，通过控制飞行生物的垂直方向和横向方向、坡度以及扑动翅膀的频率，使得模拟飞行生物能够以指定的顺序通过控制点。作为表示鸟群的方法，我们开发了跟随领导型模型和群体型模型。在前一种类型中，羊群的组织方式使得羊群的其余部分跟随领导者。后一种类型包含称为“Boid”的群体表示。在 Boid 方法中，创建个体运动的运动向量以直接作用于群体的每个成员。然而，所提出的模型实际上无法使运动矢量直接作用于每只鸟，因为鸟类只能利用拍打翅膀产生的力来飞行。因此，我们为每只鸟设置动态控制点，并让一个运动矢量作用在控制点上。这种方法可以在配备运行频率为 1.7 GHz 的 Pentium 4 和 GeForce 3 显卡的 PC 上实时显示约 12 只鸟的鸟群。