With the development of remote sensing devices, it becomes more and more convenient for individual researchers to acquire high-resolution point cloud data by themselves. There have been plenty of online tools for researchers to exhibit their work. However, the drawback of existing tools is that they are not flexible enough for the users to create 3D scenes of a mixture of point-based and triangle-based models. X3DOM is a WebGL-based library built on Extensible 3D (X3D) standard, which enables users to create 3D scenes with only a little computer graphics knowledge. Before X3D 4.0 Specification, little attention has been paid to point cloud rendering in X3DOM. PointProperties, an appearance node newly added in X3D 4.0, provides point size attenuation and texture-color mixing effects to point geometries. In this work, we propose an X3DOM implementation of PointProperties. This implementation fulfills not only the features specified in X3D 4.0 documentation, but other shading effects comparable to the effects of triangle-based geometries in X3DOM, as well as other state-of-the-art point cloud visualization tools. We also evaluate the performances of some of these effects. The result shows that a general laptop is able to handle most of the examined conditions in real-time. / Master of Science / With the development of remote sensing devices, it becomes more and more convenient for individual researchers to acquire high-resolution point cloud data by themselves. There have been plenty of online tools for researchers to exhibit their work. However, the drawback of existing tools is that they are not flexible enough for the users to create 3D scenes of a mixture of point-based and triangle-based models. X3DOM is a WebGL-based library built on Extensible 3D (X3D) standard, which enables users to create 3D scenes with only a little computer graphics knowledge. Most of the 3D Scenes can be created with several lines of HTML and JavaScript code. Before X3D 4.0 Specification, little attention has been paid to point cloud rendering in X3DOM. PointProperties, an appearance node newly added in X3D 4.0, provides point size attenuation and texture-color mixing effects to point geometries. It applies to all point-based geometries in X3DOM and distinguishes point cloud from naive particles. In this work, we propose an X3DOM implementation of PointProperties. This implementation fulfills not only the features specified in X3D 4.0 documentation but other shading effects to produce appearance comparable with triangle-based geometries in X3DOM, as well as other state-of-the-art point cloud visualization tools. We also evaluate the performances of some of these effects. The result shows that a general laptop can handle most of the examined conditions in real-time.

M.Sc. (Computer Science) / A challenge faced when simulating the complex behaviour of cloth, especially at interactive frame rates, is maintaining an acceptable level of realism while keeping computation time to a minimum. A common method used to increase the performance is to decrease the number of nodes controlling the cloth's movement. This results in a significant decrease in the time taken to calculate each frame of the animation, but at the cost of sacrificing detail that can only be obtained using a dense discretisation of the cloth. A simple, efficient and popular method to simulate cloth is the mass-spring system, which utilises a regular grid of vertices representing discrete points along the cloth's surface. The structure of geometry images is similar, which makes them an ideal choice for representing arbitrary surface meshes in a cloth simulator whilst retaining the effciency of a mass-spring system. This dissertation presents a novel method of applying geometry images to cloth simulation in order to obtain cloth motion for surface meshes while retaining the simplicity of a massspring model. By adapting an implicit/explicit integration scheme, and utilising the regular structure of geometry images, an improvement in performance is achieved. Additionally, the cloth is able to drape over other objects, also represented as geometry images. The proposed method is efficient enough to allow fairly dense cloth meshes to be simulated in real-time.

Typescript (photocopy). / Digitized by Kansas Correctional Industries

Typescript (photocopy). / Digitized by Kansas Correctional Industries

Typescript (photocopy). / Digitized by Kansas Correctional Industries

Thesis (M.F.A.)--Rochester Institute of Technology, 2007. / Typescript. Includes bibliographical references (leaves 20-21).

Thesis (M.F.A.)--Rochester Institute of Technology, 1992. / On T.p. "[copyright]" appears as the copyright symbol. Includes bibliographical references (leaves 18-21).

Thesis (M.S.)--Rochester Institute of Technology, 1987. / Typescript. Includes bibliographical references (leaves 111-113).

Thesis (M.S.)--Brigham Young University. Dept. of Computer Science, 2004. / Includes bibliographical references (p. 101-102).

Thesis (M.Phil.)--Hong Kong University of Science and Technology, 2009. / Includes bibliographical references (p. 53-57).