Query: webgl

title: DESIGN AND IMPLEMENTATION OF VIRTUAL SIMULATION TEACHING SYSTEM FOR UAV BASED ON WEBGL
abstract: With the advent of the 5G era of digital smart city, "UAV Application" is booming, and there is more and more demand for UAV remote sensing technology. How to cultivate high tech application talents of UAV has become the primary problem to be solved in the development process of UAV. Based on WebGL technology, this paper combines virtual reality and panoramic technology, and adopts lightweight B/S architecture to develop an open platform for virtual simulation teaching that integrates online display, teaching, practical training, assessment, communication and management of UAV. The platform realizes the "three dimensional teaching material, teaching platform, virtual exhibition hall" of the trinity teaching mode. Students can log in through the account to carry out theoretical learning, flight control operation learning and other interfaces, which can meet the training needs of high tech application talents of UAV and strengthen students' understanding of theory and practice, simulation training has the advantages of repeated practice, without being limited by the space and time, and solve the problems of low interest, poor scalability and high cost of traditional UAV training.

title: Research on Lightweight Method of Ancient Building Information Model Based on WebGL
abstract: Aiming at the large amount of component data in the 3D dynamic display of the ancient building BIM model, which caused difficulties in information exchange during the protection of the ancient building, a lightweight method of the ancient building BIM model combining with WebGL and IFC standards was proposed. Using WebGL technology to extend the 3D visualization method of BIM models of ancient buildings, providing new technical support for the protection and research of ancient buildings. First define the JSON intermediate file, design the Revit JSON data interface, make the model support .html and .js format, and improve the visual display method of the web side; use JavaScript to directly call the JSON interactive program of the underlying GPU to improve the web side rendering effect of the model; Three.js framework realizes the display and interaction of 3D models of ancient buildings on the Web. Taking a typical ancient building as an example to carry out experiments, the method in this paper can reduce the storage volume by more than 70% on the basis of ensuring that the model information is complete, and has a good rendering effect in the browser. The experimental results verify the effectiveness and feasibility of the method.

title: Using WebGL to Visualize Training Materials in the Educational Process
abstract: The digitalization of modern education relies on the digitization of educational materials. Digitizing text or drawings is not difficult, but creating and rendering a three dimensional digital copy of a physical object is not a trivial task. This article is about WebGL, a browser based technology for working with graphics that can be used to visualize digitized educational materials.

title: The Risks of WebGL: Analysis, Evaluation and Detection
abstract: WebGL is a browser feature that enables JavaScript based control of the graphics processing unit (GPU) to render interactive 3D and 2D graphics, without the use of plug ins. Exploiting WebGL for attacks will affect billions of users since browsers serve as the main interaction mechanism with the world wide web. This paper explores the potential threats derived from the recent move by browsers from WebGL 1.0 to the more powerful WebGL 2.0. We focus on two possible abuses of this feature: distributed password cracking and distributed cryptocurrency mining. Our evaluation of the attacks also includes the practical aspects of successful attacks, such as stealthiness and user experience. Considering the danger of WebGL abuse, as observed in the experiments, we designed and evaluated a proactive defense. We implemented a Chrome extension that proved itself effective in detecting and blocking WebGL. We demonstrate in our experiments the major improvements of WebGL 2.0 over WebGL 1.0 both in performance and in convenience. Furthermore, our results show that it is possible to use WebGL 2.0 in distributed attacks under real world conditions. Although WebGL 2.0 shows similar hash rates as CPU based techniques, WebGL 2.0 proved to be significantly harder to detect and has a lesser effect on user experience.

title: Implementation of an open platform for 3D spatial information based on WebGL

title: Corrigendum to "Implementation of an open platform for 3D spatial information based on WebGL"

title: 3D Visualization Process and Efficiency Analysis of Geographic Information Based on WebGL
abstract: With the rapid development of geographic information technology, the web based 3D visualization technology is constantly updated with the development of computers. However, the traditional 3D geographic data visualization software based on the rich client model it has significant limitations in the display and analysis of geospatial information and it is difficult to install and use, result in that difficult to meet the application of Geo dynamic simulation, visual analysis, and collaborative decision making of the geographic process. In order to show the realism of spatial data more directly, this paper introduces a 3D visualization process design method of geographic information and analyses the 3D data modelling building and visualization efficiency. The process combines multiple data sources are loaded automatically, cross platform, 2D &amp; 3D integration, and make a wider range of customers easily access to the visualization effect of 3D spatial data.

title: Monitoring and analysis of the skull shape based on WebGL

title: Development of WebGL based Virtual Teaching Platform for Mold Design
abstract: As an outcome of the further development of modern simulation technology, virtual technology has been widely used under the support of computer technology and multimedia technology and provides more interactivity and perceptibility. However, in the past, the design of virtual teaching system was mainly based on theoretical analysis, resulting in low practicability. The appearance of WebGL standard simplifies the procedure of developing web specific rendering plug ins, contributing to more seamless 3D scenes and models. This study constructed the theory from several aspects including multimedia teaching effect under cognitive theory, WebGL architecture, design of virtual teaching curriculum based on WebGL, and built a WebGL based virtual teaching platform for mole design through designing the overall framework and constructing the three dimensional teaching environment. Practice has proved that the platform makes it convenient for users to create teaching scenarios and engage in interactions, and strengthens students' understanding of theoretical knowledge and skill practice.

title: WebGL based Visualization Method for Large scale 3D Scene
abstract: For the requirements of transmission and real time visualization of large scale threedimensional scenes in the Web environment, this paper adopts the three dimensional model data structure 3DTiles which is suitable for data sharing and network switching, and analyzes the advantages of building three dimensional scenes based on 3D Tiles. Meanwhile, through the skipping loading of the hierarchical detail model, the model loading time, network requests and memory consumption are reduced, while the scene data drawing efficiency is improved. Based on these theories and technologies, this paper designs and builds a three dimensional digital earth platform based on WebGL. Experimental results show that this platform can smoothly implement the drawing of large scale 3D scenes, and achieve the visualization effects and good visual experience.