scholarly journals APPLICATION OF PARAMETRIZATION OF CHARACTERISTIC CROSS SECTIONS OF OBJECTS FOR INDIRECT PARAMETRIZATION OF THEIR 3D MODELS IN AUTOCAD CAD

2021 ◽  
pp. 99-107
Author(s):  
Tetjana Gnitetska ◽  
Galyna Gnitetska ◽  
Dmitriy Motulyov
Keyword(s):  
Cross Sections ◽  
3D Model ◽  
Longitudinal Section ◽  
3D Models ◽  
Educational Process ◽  
Engineering Practice ◽  
Design Work ◽  
3D Objects ◽  
Typical Part ◽  
Kyiv Polytechnic Institute

The developed algorithm of indirect parametrization of 3d model of a typical part by means of parametrization of its longitudinal section is presented in the work. Controlling the shape of 3d objects by parameterizing their 2d cross-sections allows, using AutoCAD CAD, to create variants of electronic models of parts, the same type in geometry and different in size characteristics. This saves resources that are spent on design work. The proposed algorithm for creating parameterized 3d models in the CAD environment AutoCAD can be used in engineering practice. Currently, methodological developments have been introduced into the educational process at the Kyiv Polytechnic Institute named after Igor Sikorsky when teaching the course "Engineering and Computer Graphics".

scholarly journals Development of augmented reality mobile application on android OS

2021 ◽  
Author(s):  
А.М. Galeeva ◽  
◽  
О.А. Medvedeva
Keyword(s):  
Augmented Reality ◽  
Mobile Application ◽  
3D Model ◽  
3D Models ◽  
Educational Process ◽  
Use Case ◽  
Modeling Methods ◽  
Lecture Material ◽  
Android Os ◽  
Educational Motivation

The article describes the use of augmented reality technologies in the modern educational process to increase educational motivation, multimedia, and interactivity of the lecture material. The main purpose of the application: educational and cognitive. In the process of performing work, computer graphics, algorithms, and modeling methods were used. Use case: there are special images on the stand that the mobile application recognizes and shows the created 3D models of the “Sun” and “Milky Way”. In addition, while the 3D model is being displayed, a short training audio lecture will be held. To create a 3D model of objects, the Unity program was used in conjunction with the augmented reality platform Vuforia.

scholarly journals USE OF DYNAMIC BLOCKS FOR CREATION OF ELECTRONIC IMAGE LIBRARIES OF TYPICAL FIXING ELEMENTS BY AUTO CAD RESOURCES

2021 ◽  
pp. 108-117
Author(s):  
Tetjana Gnitetska ◽  
Galyna Gnitetska ◽  
Evgeniy Pustovit
Keyword(s):  
Computer Aided Design ◽  
Educational Process ◽  
Design System ◽  
Resource Saving ◽  
Design Work ◽  
Image Libraries ◽  
Kyiv Polytechnic Institute ◽  
Aided Design ◽  
The Impact ◽  
Auto Cad

The use of electronic libraries of parameterized images of objects made in the form of dynamic blocks in the practice of design work refers to resource-saving technologies that are actively used in modern production. The article considers an example of creating parameterized simplified images of fasteners using dynamic blocks of the computer-aided design system AutoCAD. Dynamic blocks can be used to create electronic image libraries of technological, design, electrical and other elements. The algorithm considered in the article to create dynamic blocks of simplified images of fasteners is introduced into the educational process at the Kyiv Polytechnic Institute named after Igor Sikorsky in the course "Engineering and Computer Graphics" and can be used in design practice. The testing of this algorithm in the training process yielded a positive result. When using parameterized drawings, students understand more deeply the impact of each parameter on the design of the object.

scholarly journals PROCEDURAL 3D MODELLING FOR TRADITIONAL SETTLEMENTS. THE CASE STUDY OF CENTRAL ZAGORI

2017 ◽  
Vol XLII-2/W3 ◽  
pp. 369-376 ◽  
Author(s):  
D. Kitsakis ◽  
E. Tsiliakou ◽  
T. Labropoulos ◽  
E. Dimopoulou
Keyword(s):  
Cultural Heritage ◽  
Large Scale ◽  
3D Model ◽  
Information Science ◽  
Research Work ◽  
3D Models ◽  
3D Modelling ◽  
3D Objects ◽  
Technological Advances ◽  
3D Scene

Over the last decades 3D modelling has been a fast growing field in Geographic Information Science, extensively applied in various domains including reconstruction and visualization of cultural heritage, especially monuments and traditional settlements. Technological advances in computer graphics, allow for modelling of complex 3D objects achieving high precision and accuracy. Procedural modelling is an effective tool and a relatively novel method, based on algorithmic modelling concept. It is utilized for the generation of accurate 3D models and composite facade textures from sets of rules which are called Computer Generated Architecture grammars (CGA grammars), defining the objects’ detailed geometry, rather than altering or editing the model manually. In this paper, procedural modelling tools have been exploited to generate the 3D model of a traditional settlement in the region of Central Zagori in Greece. The detailed geometries of 3D models derived from the application of shape grammars on selected footprints, and the process resulted in a final 3D model, optimally describing the built environment of Central Zagori, in three levels of Detail (LoD). The final 3D scene was exported and published as 3D web-scene which can be viewed with 3D CityEngine viewer, giving a walkthrough the whole model, same as in virtual reality or game environments. This research work addresses issues regarding textures' precision, LoD for 3D objects and interactive visualization within one 3D scene, as well as the effectiveness of large scale modelling, along with the benefits and drawbacks that derive from procedural modelling techniques in the field of cultural heritage and more specifically on 3D modelling of traditional settlements.

Creating 3D Models from Sketch Plans for Spatial Landscape Evaluation

2012 ◽  
Vol 1 (1) ◽  
pp. 42-55 ◽  
Author(s):  
Bauke de Vries ◽  
Joop van den Tillaart ◽  
Kymo Slager ◽  
Rona Vreenegoor ◽  
Joran Jessurun
Keyword(s):  
3D Model ◽  
Specific Area ◽  
3D Models ◽  
Physical Models ◽  
Landscape Type ◽  
3D Objects ◽  
Landscape Types ◽  
Sketch Plan ◽  
High Level ◽  
2D Sketch

2D sketch plans are hard to interpret for non-professionals and do not contain enough information for plan evaluation. Simple extrusion of 2D sketch plans into 3D will not suffice. This problem is faced by stakeholders in the early stages of the plan design process. Landscape types play an important role in bridging the gap between abstract 2D plans and 3D physical models. A landscape type consists of pictures from an existing landscape, a 3D model and additional attributes providing quantitative data. Through a matching algorithm, 2D landscape components in the sketch plan are replaced by 3D objects. Multiple 3D plans can be created from a specific area with different landscape types. These 3D plans are visualized with a high level of realism and they can be evaluated using the additional data. In this paper examples are shown for an apartment district and a villa district under different energy scenarios. The visual consequences of strategic energy decisions become apparent in the 3D model.

3D Model of the Robot OTC Created by Digital Photogrammetry

2015 ◽  
Vol 791 ◽  
pp. 174-177
Author(s):  
Vladimír Baláž
Keyword(s):  
3D Model ◽  
Digital Camera ◽  
3D Models ◽  
Engineering Practice ◽  
Digital Photogrammetry

Digital photogrammetry is a method, which is still seeking for its place in creating 3D models in engineering practice. To digitize and create 3D models using this method we need a digital camera and for processing images of objects photogrammetric software and PC.

scholarly journals A 3D Geological Model as a Base for the Development of a Conceptual Groundwater Scheme in the Area of the Colosseum (Rome, Italy)

Geosciences ◽  
2020 ◽  
Vol 10 (7) ◽  
pp. 266
Author(s):  
Cristina Di Salvo ◽  
Marco Mancini ◽  
Gian Paolo Cavinato ◽  
Massimiliano Moscatelli ◽  
Maurizio Simionato ◽  
...  
Keyword(s):  
Cross Sections ◽  
3D Model ◽  
Numerical Models ◽  
Monitoring Network ◽  
3D Models ◽  
Local Scale ◽  
Groundwater System ◽  
Archaeological Heritage ◽  
Conceptual Schemes ◽  
Geological Models

Geological models are very useful tools for developing conceptual schemes owing to their capacity to optimize the management of stratigraphic information. This is particularly true in areas where archaeological heritage is exposed to hydrogeological hazards; 3D models can constitute the first step toward the construction of numerical models created to understand processes and plan mitigation actions to improve visitor safety and preserve archaeological heritage. This paper illustrates the results of a 3D hydrostratigraphic model of the site of the Colosseum in the Central Archaeological Area of Rome. In recent years, this area has experienced numerous floods caused by intense meteorological events. A new borehole survey provided the opportunity to update previous maps and cross sections and build a local scale 3D model. The resulting conceptual model was used to identify primary gaps in existing knowledge about the groundwater system and to optimize the planning of a piezometer monitoring network. Further studies can then focus on the development of groundwater numerical models to verify hypotheses regarding inflow-outflow dynamics and facilitate the optimization of water management.

scholarly journals Digital 3D-Objects Visualization in Forming Virtual Exhibitions

2020 ◽  
Vol 23 (3) ◽  
pp. 418-432 ◽  
Author(s):  
Nikolay Evgenvich Kalenov ◽  
Sergey Alexandrovich Kirillov ◽  
Irina Nikolaevna Sobolevskaya ◽  
Aleksandr Nikolaevich Sotnikov
Keyword(s):  
3D Model ◽  
3D Models ◽  
Electronic Library ◽  
Scientific Heritage ◽  
Museum Exhibits ◽  
3D Objects ◽  
Interactive Animation ◽  
Wide Range ◽  
Interactive 3D ◽  
3D Web

The paper is presents approaches to solving the problem of creating realistic interactive 3D web-collections of museum exhibits. The presentation of 3D-models of objects based on oriented polygonal structures is considered. The method of creating a virtual collection of 3D-models using interactive animation technology is described. It is also shown how a full-fledged 3D-model is constructed on the basis of individual exposure frames using photogrammetry methods. The paper assesses the computational complexity of constructing realistic 3D-models. For the creation of 3D-models in order to provide them to a wide range of users via the Internet, the so-called interactive animation technology is used. The paper presents the differences between the representations of full-fledged 3D-models and 3D-models presented in the form of interactive multiplication. The technology of creating 3D-models of objects from the funds of the State Biological Museum named K.A Timiryazev and the formation on their basis of the digital library “Scientific Heritage of Russia” of a virtual exhibition dedicated to the scientific activities of M.M. Gerasimov and his anthropological reconstructions, and vividly demonstrating the possibility of integrating information resources by means of an electronic library. The format of virtual exhibitions allows you to combine the resources of partners to provide a wide range of users with collections stored in museum, archival and library collections.

scholarly journals Dynamic modeling of tunnel survey spatiotemporal data

2014 ◽  
Vol 20 (2) ◽  
pp. 354-375
Author(s):  
Xiaolong Li ◽  
Jiansi Yang ◽  
Bingxuan Guo ◽  
Hua Liu ◽  
Jun Hua
Keyword(s):  
Survey Data ◽  
Cross Section ◽  
Cross Sections ◽  
3D Modeling ◽  
3D Model ◽  
Three Dimensional ◽  
Spatiotemporal Data ◽  
Excavation Process ◽  
Special Cases ◽  
Time Stamps

Currently, for tunnels, the design centerline and design cross-section with time stamps are used for dynamic three-dimensional (3D) modeling. However, this approach cannot correctly reflect some qualities of tunneling or some special cases, such as landslips. Therefore, a dynamic 3D model of a tunnel based on spatiotemporal data from survey cross-sections is proposed in this paper. This model can not only playback the excavation process but also reflect qualities of a project typically missed. In this paper, a new conceptual model for dynamic 3D modeling of tunneling survey data is introduced. Some specific solutions are proposed using key corresponding technologies for coordinate transformation of cross-sections from linear engineering coordinates to global projection coordinates, data structure of files and database, and dynamic 3D modeling. A 3D tunnel TIN model was proposed using the optimized minimum direction angle algorithm. The last section implements the construction of a survey data collection, acquisition, and dynamic simulation system, which verifies the feasibility and practicality of this modeling method.

scholarly journals UNDERWATER PHOTOGRAMMETRY DIGITAL SURFACE MODEL (DSM) OF THE SUBMERGED SITE OF THE ANCIENT LIGHTHOUSE NEAR QAITBAY FORT IN ALEXANDRIA, EGYPT

2019 ◽  
Vol XLII-2/W10 ◽  
pp. 1-8 ◽  
Author(s):  
M. Abdelaziz ◽  
M. Elsayed
Keyword(s):  
3D Model ◽  
Low Cost ◽  
Data Gathering ◽  
Archaeological Site ◽  
3D Models ◽  
Surface Model ◽  
Digital Surface Model ◽  
Architectural Elements ◽  
3D Photogrammetry ◽  
First Time

<p><strong>Abstract.</strong> Underwater photogrammetry in archaeology in Egypt is a completely new experience applied for the first time on the submerged archaeological site of the lighthouse of Alexandria situated on the eastern extremity of the ancient island of Pharos at the foot of Qaitbay Fort at a depth of 2 to 9 metres. In 2009/2010, the CEAlex launched a 3D photogrammetry data-gathering programme for the virtual reassembly of broken artefacts. In 2013 and the beginning of 2014, with the support of the Honor Frost Foundation, methods were developed and refined to acquire manual photographic data of the entire underwater site of Qaitbay using a DSLR camera, simple and low cost materials to obtain a digital surface model (DSM) of the submerged site of the lighthouse, and also to create 3D models of the objects themselves, such as statues, bases of statues and architectural elements. In this paper we present the methodology used for underwater data acquisition, data processing and modelling in order to generate a DSM of the submerged site of Alexandria’s ancient lighthouse. Until 2016, only about 7200&amp;thinsp;m<sup>2</sup> of the submerged site, which exceeds more than 13000&amp;thinsp;m<sup>2</sup>, was covered. One of our main objectives in this project is to georeference the site since this would allow for a very precise 3D model and for correcting the orientation of the site as regards the real-world space.</p>

scholarly journals FROM ARCHIVE DOCUMENTATION TO ONLINE 3D MODEL VISUALIZATION OF NO LONGER EXISTING STRUCTURES: THE TURIN 1911 PROJECT

2020 ◽  
Vol XLIII-B2-2020 ◽  
pp. 837-844
Author(s):  
D. Einaudi ◽  
A. Spreafico ◽  
F. Chiabrando ◽  
C. Della Coletta
Keyword(s):  
Cultural Heritage ◽  
3D Model ◽  
3D Models ◽  
World's Fair ◽  
Existing Structures ◽  
Present Generation ◽  
Technical Issues ◽  
Digital Documentation ◽  
3D Documentation ◽  
Model Visualization

Abstract. Rebuilding the past of cultural heritage through digitization, archiving and visualization by means of digital technology is becoming an emerging issue to ensure the transmission of physical and digital documentation to future generations as evidence of culture, but also to enable present generation to enlarge, facilitate and cross relate data and information in new ways. In this global effort, the digital 3D documentation of no longer existing cultural heritage can be essential for the understanding of past events and nowadays, various digital techniques and tools are developing for multiple purposes.In the present research the entire workflow, starting from archive documentation collection and digitization to the 3D models metrically controlled creation and online sharing, is considered. The technical issues to obtain a detail 3D model are examined stressing limits and potentiality of 3D reconstruction of disappeared heritage and its visualization exploiting three complexes belonging to 1911 Turin World’s Fair.

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