SRC - a streamable format for generalized web-based 3D data transmission

Abstract

1 Fraunhofer IGD 2 TU Darmstadt (a) 17% triangles, low-resolution texture (b) 86% triangles, low-resolution texture (c) 86% triangles, high-resolution texture (d) 100% triangles, high-resolution texture Figure 1: Streaming of mesh data, progressively encoded with the POP Buffer method, using our proposed SRC container format. We minimize the number of HTTP requests, and at the same time allow for a progressive transmission of geometry and texture information, using interleaved data chunks. Our proposed format is highly flexible, well-aligned with GPU structures, and can easily be integrated into X3D. AbstractA problem that still remains with today's technologies for 3D asset transmission is the lack of progressive streaming of all relevant mesh and texture data, with a minimal number of HTTP requests. Existing solutions, like glTF or X3DOM's geometry formats, either send all data within a single batch, or they introduce an unnecessary large number of requests. Furthermore, there is still no established format for a joined, interleaved transmission of geometry data and texture data.Within this paper, we propose a new container file format, entitled Shape Resource Container (SRC). Our format is optimized for progressive, Web-based transmission of 3D mesh data with a minimum number of HTTP requests. It is highly configurable, and more powerful and flexible than previous formats, as it enables a truly progressive transmission of geometry data, partial sharing of geometry between meshes, direct GPU uploads, and an interleaved transmission of geometry and texture data. We also demonstrate how our new mesh format, as well as a wide range of other mesh formats, can be conveniently embedded in X3D scenes, using a new, minimalistic X3D ExternalGeometry node.

4d Reconstruction and Visualization of Cultural Heritage: Analyzing Our Legacy Through Time

“…Moreover, the data exchange and rendering it is an issue under study, since it could improve the data transmission and data streaming by means of a Level of Detail (LoD) visualization (Limper et al, 2014). An implementation of the above-mentioned simplification, optimization for web visualization of a large extension archaeological site (landscape scale) is shown in Torres-Martínez, et al, (2016).…”

A Multi-Data Source and Multi-Sensor Approach for the 3D Reconstruction and Web Visualization of a Complex Archaelogical Site: The Case Study of “Tolmo De Minateda”

“…Although this glTF format is able to deliver an arbitrary number of mesh data buffers within a single file, it completely lacks any mechanism for progressive data transmission. Trying to overcome this limitation, new file formats are being developed [54]. The basic idea would be to improve the data streaming by means of a Level of Detail (LoD) visualization in order to reduce the number of WebGL draw calls.…”

Animation on the web

“…Furthermore, there is still no established format for a joined, interleaved transmission of geometry data and texture data. [Limper et al 2014a] aims to minimize the number of HTTP requests, by progressively transmitting an arbitrary number of mesh data chunks within a single SRC file. This file contains the reference to all the resources of data and progressively downloads them.…”

“…They need to be progressively maintained and processed as LOD of geometry and connectivity is handled. Some example of recent techniques are [Lee 2013;Limper et al 2014a;Schwartz et al 2011;Behr et al 2012]. …”

“…It needs to rely on simple yet effective algorithm, which could easily transcribe itself onto JavaScript and WebGL. Figure 3: Multiple XHRs to server to download resources is not good., Idealy streaming XHR should consist of only one request.Image reference from [Limper et al 2014b] …”