The need for the -family of the 3D rendering API's are highly increasing, especially for graphical human-machine interfaces on various systems. In the case of safety-critical market for avionics, military, medical and automotive applications, SC, the safety critical profile of the standard plays the major role for graphical interfaces. In this paper, we present an efficient way of implementing SC 3D graphics API for the environments with hardware-supported 1.1 and its multi-texture extension facility, which is widely available on recent embedded systems. Our approach achieved the SC features at the low development cost on the embedded systems and also on general personal computers. Our final result shows its compliance with the SC standard specification. From the efficiency point of view, we measured its execution times for various application programs, to show a remarkable speed-up.

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We have developed Fusion technique which allows us to assemble two or more visualization results and CG models into a window without any modification to the original software. This paper describes the introduction of the technique and shows some examples to apply it to integrate data from engineering fields and CG world.

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In this study, we strive to synthesize different variants of the Epsilon kappa curves which is an extension of an interpolating spline called the κ-curve. κ-curves had been applied as the curvature tool of Adobe Illustrator and Photoshop and are exceedingly valued by all designers. In this research we synthesize Epsilon Kappa curves and show its features through the generation of the curve with

. Main purpose of the GUI is to visually represent the free and easy manipulation of the curve. After the creation of the GUI in we will try to create various shapes to further understand the properties of the curve. By doing so we are able to prove the usage of the curve in CAD and 3D design software. We have used Glut functions to represent and create the curve in the GUI. Finally, we were able to verify that the generated curves are almost G 2-continuous everywhere and the curve overcomes the disadvantages of the κ-curve.

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The motion of rising bubbles in a cylindrical container is reproduced in a three-dimensional computer graphics. The time history of 3-D position and shape of bubbles is determined from stereoscope video images of real bubbly flow by using a conventional PTV technique. The is used to produce the animation. The surface model is applied to draw the bubbles. In order to describe the bubbles in a realistic manner, a semitransparent color is used to draw the surface of bubbles. The swap buffer method is used to realize the real-time animation. Sequential panoramic images of the bubbly flow are achieved by using the present technique. It is found that the playing speed of animation depends on the power of CPU.

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本作品は、(Open Graphics Library)を用いて作成された布のシミュレーションである。布は日常にごくありふれたものであるが、それをCGでリアルに表現することは非常に難しい。そこに着目し、どのようにしたら本物らしい動きや見え方を表現できるか、その方法を探った。特に布の見え方に着目し、テクスチャや照光条件、布の厚みなどを変化させることで様々な布の質感を表現した。

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Now remotely operated underwater vehicle (ROV) becomes main tool to explore or to make work in the sea and high performance is expected as a usual matter. The authors have been studying how to improve the performance of robot arm on the ROV and proposed here a new technology to show the image of the objects more clearly with diminishing interference of robot arm as a 1^st result. This technology uses computer graphics and builds 3D vision through the image of robot arm with it. That is as follows; when we get the interfering image of object and robot arm, we replace the image of robot with the graphic model and fill the interfered parts of object with the data without interference. This method proved usefulness with experiments and it is on the improvement for actual use now.

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をグラフィックス・インターフェースとした３次元分子表示プログラムを開発した。このプログラムは３種類の形式の分子の座標値を読み込み、Windows 上にその３次元構造をグラフィックス表示する。本プログラムはVisual C++ で開発したのでWindows 系のOS が載っているパーソナルコンピュータで利用することが可能である。

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A software designated as 3DASBS has been used for the analysis of the silkworm spinning behaviour. However, its use has been limited to the expensive workstations that can run specialized 3D graphics libraries. In this paper, we report on the development of a new visualization system of the silkworm spinning behaviour based on 3DASBS that can be run on the widely used Windows 98/NT platform. It can display a silkworm body more realistically by overlapping spheres. Since all the procedures are written as object classes using an object-oriented programming language, the system can easily be extended by inheritance of the classes.

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Head-mounted display-type VR devices (HMDs) are becoming a practical platform for three-dimensional scientific visualization. To reuse software assets that have been developed for CAVE-type VR systems (CAVEs), this paper presents a C++ library for porting CAVE application software to HMDs. Our library emulates the function calls of CAVELib, which is a commercial library for developing application software executable on CAVEs, and it enables us to easily port CAVELib application software to HMDs with minor modifications to the original source code. Sharing the source code also leads to an improvement in the software development efficiency, which is executable on both CAVEs and HMDs.

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In parallel mechanisms, the form and volume of workspace also change variously with the attitude of a platform. This paper presents a method to search for the workspace of parallel mechanisms with 6-DOF and 3D visualization of the workspace. Workspace is a search for the movable range of the central point of a platform when it moves with a given orientation. In order to search workspace, geometric analysis based on inverse kinematics is considered. Plots of 2D of calculations are compared with those measured by position sensors. The test results are shown to have good agreement with simulation results. The workspace variations are demonstrated in terms of 3D and 2D plots for prototype mechanisms. The workspace plots are created with and Visual C++ by implementation of the algorithm. An application module is developed, which displays workspace of the mechanism in 3D images. The effectiveness and practicability of 3D visualization on workspace are successfully demonstrated by 6-DOF parallel mechanisms.

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With extremely improving computer performances, computer aided visualizations of numerically calculated data are strongly needed to be realized in easier operation and lower cost performance. This paper describes a newly constructed software for 3D computer graphics including animations of numerical calculation data. Several examples are clearly visualized using the present 3D animation software, which can well verify its usefulness and wide applicability.

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This paper discusses an approach to implement projection transformation for projector based stereo display system. The approach does not require users to have specialized knowledge on either hardware setup and sophisticated rendering algorithms. In our approach, position and orientation of projector relative to screen are estimated based on test projection, and a projection transformation that is processable by model-view and projection matrix scheme is generated. This approach relaxes constraints on both projector installation and rendering hardware, and enables reusing existing drawing program code.

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ES 1.1 is a de facto standard for the 3D graphics API on embedded systems and handheld devices including mobile phones. We present design process and implementation results of our software ES 1.1 product. Since the standard document only specifies the API functions and their external actions, the implementer should design all the details of the internal 3D graphics pipeline and exhaustively optimize them. To clearly express the internal pipeline and to explicitly represent related state variables, we introduce some enhancements to UML activity diagrams. Based on these enhanced diagrams, we accomplished the initial draft design and iterative optimizations of the internal pipeline. During the implementation stage, starting from our previous wrapper implementation, we used an iterative block-by-block implementation scheme with immediate verifications. Finally, we achieved a full software implementation of ES 1.1, which passes all the official conformance test suites and also satisfies all the requirements in the standard specification. This product is now ready for commercial services.

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対象系全体を必要な物理精度に応じて部分系に分け，各部分系に必要精度を持つ計算手法を適用する同時並列型ハイブリッドシミュレーション法が最近注目されている．我々は，原子(粒子)描像であったり連続体描像であったりするなどのハイブリッドシミュレーションコードが出力する多様かつ多数な物理変数の数値を統一的に扱い，さらにそれらの時間変化をアニメーションとして可視化するソフトウェアAkiraを開発した．Akiraを用いると，原子描像と連続体描像を混在させたり，多彩に表示した原子群のダイナミクスを原子毎の軌跡として表示させたりするなど様々な形式で，シミュレーションの結果を物理的な解釈がしやすくなるように表現することが出来る．簡易な操作で時間変化を，静止画のシークエンスとしても出力出来る．ソースコードはJava言語でを用いて作成しているため，プラットホームの違いを気にしないで利用出来る．ユーザーが独自に改変することも，ソースコードと共に開発資料を公開しているため容易である．本論文ではAkiraの特徴的な機能を，いくつかの応用例を通じて概説する．

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