Browsing by Subject "3D visualization"

Now showing 1 - 3 of 3

Access status: Open Access ,
An analysis and 3D visualization of shading of urban spatial objects with the use of the Phython programming language in the Blender application
(2015) Ilba, Mateusz
Shading analysis has been performed for several years. It is commonly performed on the basis of raster data with saved height attributes. An undoubted advantage of the application of raster is the speed and the easiness of the analysis but this solution has also many limitations. One of them is the impossibility of executing a correct analysis for a 3D city. The analysis performed only on raster data cannot answer the question, what happens to vertical elements of buildings and yet surfaces of these elements (walls) are far greater in big cities than horizontal and oblique ones, which we are able to save as raster images [11]. It is only recently that the tools are available, which make it possible to analyze the shading on 3D models. However, such tools have a lot disadvantages, they are expensive and have some limitations. On the example of the ArcGIS application, the following limitations can be enumerated: difficulties, while determining shadowed surfaces together with their classification, in the case of the Bentley Microstation V8i application, there is no influence on the output classification, the access to the generated data is carried out by displaying results. Additional software for these applications is created but it is payable and also does not give 100% control over the presentation of results. It is in this article that we will take a closer look at the feasibility of an analysis of shading of high urban buildings and its visualization using an algorithm for ray tracing that is available in the Blender application available under the GPL license. The author tested the work of the application on an example of an artificially built part of a 3D city and on a part of New York.
Access status: Open Access ,
Computer modeling for the visualization and geometric reconstruction of artefacts from the casting workshop in Grzybiany
(2015) Garbacz-Klempka, Aldona; Rzadkosz, Stanisław; Stolarczyk, Tomasz; Kozana, Janusz; Piękoś, Marcin; Kwak, Zofia; Tenerowicz, Mieszko
The casting workshop in Grzybiany is one of the most important archaeological sites in regards to casting technology from the Bronze and Early Iron Ages. During the 'Grzybiany. Osada nadjeziorna z epoki brązu i żelaza' [Grzybiany. Lakeside settlement from the Bronze and Early Iron Ages] research, the structure of casting moulds was analyzed as well as the chemical composition and microstructure of one of the more-interesting metal artefacts found within the workshop. Based on this, geometric visualization was performed with the help of computer-modeling methods. For scientific, experimental, and educational purposes, reconstruction of a zoomorphic pendant was performed using the lost-wax method. Wax models injected into a matrix were used, along with fired ceramic (gypsum) moulds and a specially prepared modeling alloy that corresponds to the original material. In this way, a true replica of the original was obtained: technologically, structurally and chemically. Studies of production technology of the casting workshop dated back to the Bronze and Early Iron Age help to increase the knowledge of the mould-preparing technology and the alloys used. Modern tools and computer programs aid in the research of old technologies and help disseminate the results.
Access status: Open Access ,
Support for create 3D computer graphics images in GIS systems using externals renders algorithm
(2014) Ilba, Mateusz
An analyses of 2D and 3D GIS systems need an appropriate presentation of the results work. Should be presented in three-dimensional graphics environment. Nowadays, more and more attention is given to highlighting the analyzed problem and aesthetic form of presentations. The paper will be present possibilities of presenting the results of 3D analysis in the form of generated 2D images. We will discuss these possibilities for example advanced ArcGIS program work with a typical CAD graphics program Cinema4D. Programs were selected in respect of the best functionality and extended functions imaging of three-dimensional models. During the preparation of this article was tested GIS application GRASS and Geomatica. They are support visualization of 3D data but have worse functionality of the selected program. Program Cinema4D was recognized the best typical CAD program from available AutoCAD, Maya, Microstation, 3ds Max, Blender. Compared to other available applications, the differences are slight. They differ in the user interface. A method of generating images and rendering algorithms in all cases are based on the same principle. The aim of the discussion is to decide whether a typical graphics program may help, in the visualization process, powerful analytical tool which is the application of ArcGIS.