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Generování vlasů interpolací
Šik, Martin
This thesis describes a procedural hair generator that is able to generate hair from just a few hairs, called hair guides, which are directly modeled by a 3d artist. The procedural hair generator is a part of Stubble project -- a tool for hair modeling in Autodesk Maya. The procedural hair generator can generate hair during rendering, thus avoiding storage of hair geometry in a scene file, which makes the rendering process very efficient. Furthermore, hair can be generated interactively and displayed by OpenGL during modeling in Maya. Generated hair geometry is mainly defined by interpolation from the mentioned hair guides; however it is also influenced by many hair properties. These properties can change hair geometry using noise functions, define hair color, width and more. To determine hair root positions on a given triangular mesh I use my own mesh sampling algorithm that generates random samples on a triangular mesh according to a density defined by a 2-dimensional texture. My sampling algorithm uses an innovative way of sampling from a discrete probability distribution, which can be used in other applications than mesh sampling.
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GPU implementation of the irradiance and radiance caching algorithms
Bulant, Martin ; Křivánek, Jaroslav (advisor) ; Šik, Martin (referee)
The object of this work is to create software implementing two algorithms for global ilumination computing. Iradiance and radiance caching should be implemented in CUDA framework on graphics card (GPU). Parallel implementation on GPU should dramatically improve algoritm speed compared to CPU implementation. The software will be written using already done framework for global illumunation computation. That allow to focus to algorithm implementation only. This work should speed up testing of new or existing methods for global illumination computing, because saving and reusing of intermediate results can be used for other algorithms too. Powered by TCPDF (www.tcpdf.org)
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Polarising Versions of Glossy BRDF Models
Bártová, Kristina ; Wilkie, Alexander (advisor) ; Šik, Martin (referee)
The goal of computer graphics is to precisely model the appearance of real objects. It includes of interactions of light with various materials. Polarisation is one of the fundamental properties of light. Incorporating polarisation parameter into an illumination model can significantly enhance the physical realism of rendered images in the case of scenes including multiple light bounces via specular surfaces, etc. However, recent rendering systems do not take polarisation into account because of complexity of such a solution. The key component for obtaining physically correct images are realistic, polarisation capable BRDF (Bidirectional Reflectance Distribution Function) models. Within this thesis, polarising versions of the following BRDF models were theoretically derived: Torrance Sparrow, He-Torrance-Sillion-Greenberg and Weidlich-Wilkie. For each of these models, Mueller matrices (the mathematical construct used to describe polarising surface reflectance) were systematically derived and their behaviour tested under various input parameters using Wolfram Mathematica. Derived polarising glossy BRDF models were further implemented using a rendering research system, ART (Advanced Rendering Toolkit). As far as we know, it is the very first usage of these BRDF models in a polarisation renderer....
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Realtime library for procedural generation and rendering of terrains
Kahoun, Martin ; Horáček, Jan (advisor) ; Šik, Martin (referee)
Techniques for procedural generation of the graphics content have seen widespread use in multimedia over the past thirty years. It is still an active area of research with many applications in 3D modeling software, video games, and films. This thesis focuses on algorithmic generation of virtual terrains in real-time and their real-time visualization. We provide an overview of available approaches and present an extendable library for procedural terrain synthesis. Powered by TCPDF (www.tcpdf.org)
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Generování vlasů interpolací
Šik, Martin ; Křivánek, Jaroslav (advisor) ; Kolomazník, Jan (referee)
This thesis describes a procedural hair generator that is able to generate hair from just a few hairs, called hair guides, which are directly modeled by a 3d artist. The procedural hair generator is a part of Stubble project -- a tool for hair modeling in Autodesk Maya. The procedural hair generator can generate hair during rendering, thus avoiding storage of hair geometry in a scene file, which makes the rendering process very efficient. Furthermore, hair can be generated interactively and displayed by OpenGL during modeling in Maya. Generated hair geometry is mainly defined by interpolation from the mentioned hair guides; however it is also influenced by many hair properties. These properties can change hair geometry using noise functions, define hair color, width and more. To determine hair root positions on a given triangular mesh I use my own mesh sampling algorithm that generates random samples on a triangular mesh according to a density defined by a 2-dimensional texture. My sampling algorithm uses an innovative way of sampling from a discrete probability distribution, which can be used in other applications than mesh sampling.
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Particle Systems
Šik, Martin ; Kmoch, Petr (referee) ; Pelikán, Josef (advisor)
In the present work I concern myself with the development of Particle systems library independent on any concrete graphical library. Particle systems are used in various graphical applications to render interesting e ects (for example: fi re, waterfall, smoke, explosions, etc.) which are nearly impossible to be rendered the same way as other ordinary objects in scene. Given the fact that this is very complex theme I choose to concentrate mostly on interactions between particles that would be fast enough for online rendering. For possible hard to compute interactions I allow saving calculated properties of particles and afterwards their fast playback. Because many moderns processors have more than one core some calculations in my library can run parallel in more threads.
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Legal aspects of network industries and natural monopolies
Šik, Martin ; Handrlica, Jakub (advisor) ; Eichlerová, Kateřina (referee)
1 Summary Key words: Natural monopoly, network industry, energy industry, regulation, liberalization, unbundling, third party access The present thesis sets out to explore the legal aspects of network industries and natural monopolies. It researches these aspects using the example of the energy sector (i.e. the power and gas industries), which is a typical example of a network industry. In terms of its geographical scope, the thesis focuses on the EU energy law and its specific application in the Czech Republic. The fundamental point of departure for the present thesis is a believe that energy law is closely intertwined with economic policy, and is appropriately interpreted only in the context of the concrete measures, tools, and concepts meant to reflect a nation's energy policy. The main driver of energy policy, and hence also of energy law, is a reform of the energy industry aiming at its liberalization. The key tools for its successful implementation are economic regulation, third party access, unbundling, and public administration by independent regulatory bodies. Firstly, the present thesis discusses the economic characteristics of network industries, that is most importantly the existence of a natural monopoly. The second part of the thesis outlines the background of liberalization and the related...
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Analysis and Applications API eBay
ŠIK, Martin
The subject of this bachelor thesis "Analysis and Applications API eBay" is to create application based on the use of Application Programming Interface (API), released by eBay. The theoretical part is focused on explaining the fundamental issue of Internet auctions, e-commmerce, comparsion of auction portals and term "trust" as a key attribute of e-commerce. The practical part is based on analyse of principles and instruments of eBay API and create an application based on this interface. The thesis is quite detailed and complex material that would provide a basic overview of e-commerce and as a kind guide introduces reader to the eBay API interface issues and provide support in the first steps with this comprehensive tool for developing applications based on technologies of eBay.
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