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Graphics Demo with a Space Theme
Prajka, Martin ; Milet, Tomáš (referee) ; Herout, Adam (advisor)
This bachelor's thesis deals with the creation of graphics demo with unlimited size by using OpenGL. The thesis implements post-processing effects such as shadow mapping, bloom and gaussian blur. In addition, it describes particle system and camera animation. The demo is placed in space and it is separated into the three scenes. The end of the thesis is focused on the results of user's and performance tests.
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Non-Photorealistic Rendering
Žilák, Jaroslav ; Bartoň, Radek (referee) ; Žák, Pavel (advisor)
The main purpose of this thesis besides providing the reader with basics of non-photorealistic rendering, is concept and possible solution for system realization, which is capable of this rendering using image post-processing. This thesis describes solution that is sufficiently flexible to support use of integrated filters along with the creation of new ones that can be recursively used to create another filters for this type of rendering. Thus part of this thesis is some kind of manual which provide basic syntax description and possibilities of use.
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Surface treatment methods applied to 3D printed samples and their analysis
Rygl, Michal ; Dobrocký, David (referee) ; Sedlák, Josef (advisor)
The presented paper deals with the issue of smoothing parts produced using FFF 3D printing technology. The aim of the paper was to compare technical surface treatment methods and economic side. Emphasis was placed especially on the degree of reduction of surface roughness while maintaining an acceptable level of process costs. Chemical smoothing, local CO2 laser melting, tumbling and surface treatment based on filler spraying were used to smooth the plastic prints. Prints made of ABS, PLA, PolySmooth and PolyCast were subjected to the smoothing process. Printing parameters were first determined for individual materials and test samples were produced on their basis. After determining the process parameters for individual surface treatment methods, the finished surfaces were measured with a profilometer. Based on the results, the chemical etching method was evaluated as the most effective surface smoothing method. Due to the etching of the surface layer of the sample made of PolySmooth material, the surface roughness parameter Sa was reduced in diameter compared to the reference sample. by 99,56 %. The least effective method was tumbling technology, which showed an average roughness reduction of 30,07 % in the case of ABS. However, the technology based on grinding parts with grinding stones had the lowest process costs for finishing the samples. Technical The economically best choice of all tested combinations was the technology of chemical etching of ABS polymer prints. The results and conclusions of the work will serve not only to select the finishing operation and material for specific applications of prints in practice, but also to expand the possibilities of using additively produced components.
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Optimization of NC program using CAD/CAM software
Paseka, Jan ; Kaderka, Jaroslav (referee) ; Osička, Karel (advisor)
Tendency of this master thesis is a proposal of savings in the process of technological production’s preparation in a manufacturing company. In the first part is elaborated general theoretical study of current components and NC programs. Based on this, and finished analysis was defined optimization’s proposals described in second part. Thanks this complete proposals comes to time and money savings, which are needed for implementation of prototype project into serial production.
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Post-processing the results of the topology optimization with the level set technique
Ježek, Ondřej ; Kopačka, Ján ; Gabriel, Dušan
Topology optimization (TO) has come to the fore with the development of 3D printing. The most commonly used method is SIMP, a density-based approach, which outputs a per-element constant density field and thus requires post-processing to obtain the shape. Conventional post-processing methods extract optimized topologies in the form of brep models. It yields only C0 continuous geometries, which are usually not suitable for downstream applications such as prototyping, design validation, and design exploration. In this paper, we present a new post-processing method based on the level set principle that overcomes common post-processing issues, such as the lack of smoothness.
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Creation of an application for post-processing results of structural analyses in the space industry
Šprta, Petr ; Silvestri, Riccardo (referee) ; Lošák, Petr (advisor)
Cílem této práce je vytvoření softwarové aplikace pro dodatečné zpracování výsledků strukturálních analýz prováděných metodou konečných prvků v programu Nastran. Náplň a téma této práce vyplývá z požadavků kladených na vývoj konstrukcí v kosmickém průmyslu, kde je pro zaručení bezpečnosti zapotřebí ověřit chování struktury při mnoha zatěžovacích stavech v různých zatěžovacích podmínkách. Díky využívání lineárních statických analýz je možné využít superpozice napětí v rámci dodatečného zpracování výsledků a tím ušetřit cenný výpočetní čas a zvýšit celkovou efektivitu pevnostních výpočtů a vyhodnocování jejich výsledků. Všechny tyto aspekty by měly být zahrnuty při vývoji aplikace, jejímž cílem je načtení výsledků dílčích analýz z programu Nastran, jejich superpozice a vyhodnocení, zapsání výsledků do programu Excel a příprava textových souborů pro vizualizaci v programu HyperView. V úvodní části práce jsou popsány specifika pevnostních výpočtů v kosmickém průmyslu ze kterých vyplývá motivace a požadavky pro vývoj aplikace. V následujících částech je popsán vývoj aplikace a na závěr je její funkčnost ověřena na reálné pevnostní analýze konstrukce vyvíjené v rámci programu Evropské kosmické agenury. Práce byla vytvořena ve spolupráci s firmou SAB Aerospace.
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Non Realistic Visualization on Lume Pad
Chalivopulosová, Aneta ; Karas, Matej (referee) ; Milet, Tomáš (advisor)
This bachelor's thesis focuses on methods of non-realistic rendering on Lume Pad. This thesis aims to test the functionality, quality, and user-friendliness of a few selected non-realistic effects applied to 3D scenes on the holographic tablet Lume Pad. These non-realistic post-processing effects are implemented and described in this thesis. Namely, edge detection, ordered dithering, random dithering, thresholding, hatching, color shading, wobbling effect and wobble carving effect, and pencil effect. The text also describes a theoretical introduction to holography, stereoscopy, and the light field.
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Development and implementation of 3D geometry extraction method for topological optimization
Šotola, M. ; Rybanský, D. ; Maršálek, P. ; Halama, R. ; Kopačka, Ján ; Ježek, Ondřej ; Gabriel, Dušan ; Tejc, J. ; Pašek, M. ; Kovář, L.
This research report TN01000024/08-V012 is an output of the subtask of the project TN1000024/08 Automation and production system optimization, one of the objectives of which is to develop methods of post-processing of topological optimization (TO) results in cooperation with MECAS ESI Ltd. Three different smoothing approaches are discussed: the Taubin method, volume representation using radial basis functions and smoothing by remeshing using the Netgen library.
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Review of methods for the post-processing of topological optimization results
Kopačka, Ján ; Ježek, Ondřej ; Gabriel, Dušan ; Šotola, Martin ; Rybanský, David ; Maršálek, Pavel ; Halama, R. ; Tejc, J. ; Pašek, M. ; Kovář, L.
The research report is an output of the sub-project TN1000024/08: Automation and production system optimization in cooperation with MECAS ESI Ltd on the development of methods for post-processing of topological optimization (TO) results. In this report a detailed survey of these methods is introduced as necessary tool for seamless integration of the results TO with subsequent numerical simulations and additive manufacturing. The selected method for post-processing based on a level-set approach using radial basis functions has been implemented and successfully tested on a well-known 2D Messerschmitt-Bölkow-Blohm (MBB) beam test problem.
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Assessment of post-processing capabilities in selected software for topology optimization
Ježek, Ondřej ; Kopačka, Ján ; Gabriel, Dušan
Topology optimization (TO) has come to the fore in recent years, especially with the development of 3D printing. Finite element systems often include TO functionality based on either\ndensity-based or level set methods. In the case of the first-mentioned method, the results of TO are further processed into geometry suitable for additive manufacturing. However, current\nprograms only include basic post-processing capabilities with minimal customization options. This paper will first briefly summarize the theoretical background of TO and post-processing\nmethods. Next, selected commercial TO programs will be compared from the perspective of shape post-processing. The final part will be devoted to applying the level set method for shape\npost-processing of a topologically optimized industrial robot gripper.
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