Relevant bibliographies by topics / Raytracer

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Academic literature on the topic 'Raytracer'

Author: Grafiati
Published: 4 June 2021
Last updated: 19 February 2022

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Journal articles on the topic "Raytracer"

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Vasiljević, Ivana, and Lidija Krstanović. "TEORIJSKE OSNOVE I IMPLEMENTACIJA RAYTRACER ALGORITMA ZA RENDEROVANjE." Zbornik radova Fakulteta tehničkih nauka u Novom Sadu 34, no. 05 (May 2, 2019): 978–81. http://dx.doi.org/10.24867/02sa01vasiljevic.

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Raytracer je algoritam globalnog osvetljenja koji se u današnje vreme koristi za kreiranje (renderovanje, eng. rendering) slika visokog stepena realističnosti. U osnovi, ideja je imitirati način realnog prostiranja svetlosti kroz prostor. Ako je prostor kroz koji se svetlost kreće homogen i izotropan, putanje svetlosti su prave linije. Dakle, problemu bi mogli pristupiti ovako: krenuvši od nekog izvora svetlosti pratili bismo kretanje jednog od zraka. Prilikom kretanja kroz prostor u jednom trenutku zrak bi došao do dioptrijskih površina i pritom se jedan njegov deo reflektuje, drugi prelama, a treći apsorbuje. U slučaju da površina nije dioptrijska jednostavno bismo zanemarili prelamanje svetlosti. Sada bi pratili novonastale zrake i ponavljali postupak za svako presecanje zraka sa površinom dok zrak ne bi došao do sočiva kamere ili oka promatrača. Samo takve zrake koje u konačnici prolaze kroz povšinu sočiva ili oka doprinose generisanju slike. Postupak bi trebalo ponoviti za svaki zrak poslat od odgovarajućeg izvora svetlosti, i isto uraditi za sve ostale izvore svetlosti (ukoliko postoje) na sceni.
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Winchen, Tobias. "RadioPropa — A Modular Raytracer for In-Matter Radio Propagation." EPJ Web of Conferences 216 (2019): 03002. http://dx.doi.org/10.1051/epjconf/201921603002.

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Experiments for radio detection of UHE particles such as e.g. ARA/ARIANNA or NuMoon require detailed understanding of the propagation of radio waves in the surrounding matter. The index of refraction in e.g. polar ice or lunar rock may have a complex spatial structure that makes detailed simulations of the radio propagation necessary to design the respective experiments and analyse their data. Here, we present RadioPropa as a new modular ray tracing code that solves the eikonal equation with a Runge-Kutta method in arbitrary refractivity fields. RadioPropa is based on the cosmic ray propagation code CRPropa, which has been forked to allow efficient incorporation of the required data structures for ray tracing while retaining its modular design. This allows for the setup of versatile simulation geometries as well as the easy inclusion of additional physical effects such as e.g. partial reflection on boundary layers in the simulations. We discuss the principal design of the code as well as its performance in example applications.
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Pontoppidan, Klaus M., Rowin Meijerink, Cornelis P. Dullemond, and Geoffrey A. Blake. "A NEW RAYTRACER FOR MODELING AU-SCALE IMAGING OF LINES FROM PROTOPLANETARY DISKS." Astrophysical Journal 704, no. 2 (October 2, 2009): 1482–94. http://dx.doi.org/10.1088/0004-637x/704/2/1482.

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Henke, Michael, and Gerhard H. Buck-Sorlin. "Using a Full Spectral Raytracer for Calculating Light Microclimate in Functional-Structural Plant Modelling." Computing and Informatics 36, no. 6 (2017): 1492–522. http://dx.doi.org/10.4149/cai_2017_6_1492.

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Finger, Larry W., Martin Kroeker, and Brian H. Toby. "DRAWxtl, an open-source computer program to produce crystal structure drawings." Journal of Applied Crystallography 40, no. 1 (January 12, 2007): 188–92. http://dx.doi.org/10.1107/s0021889806051557.

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The computer programDRAWxtlproduces crystal structure drawings in the form of an interactive screen representation, as well as VRML files for use on web pages and in classroom teaching, and creates input files for the popularPersistence of Vision Raytracer(POV-Ray) rendering program for publication-quality graphics, including generation of stereo pairs.DRAWxtloutput produces the standard kinds of graphical representations: spheres, ellipsoids, bonds and polyhedra of any complexity. In addition, it can draw arrows to represent magnetic moments, show capped cones to indicate the location of lone-pair electrons and display Fourier contours in three dimensions. A unique feature of this program is the ability to plot incommensurately modulated and composite structures. This open-source program can be used with operating systems as diverse as Windows (9X, NT, 2000 and XP), Mac OS X, Linux and most other varieties of Unix.
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Walder, Cordula. "Optical modeling of thin-film silicon solar cells by combination of the transfer-matrix method and the raytracer algorithm." Optical Engineering 51, no. 7 (July 6, 2012): 073801. http://dx.doi.org/10.1117/1.oe.51.7.073801.

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Sun, Mengyao, Jie Zhang, and Wei Zhang. "Alternating first-arrival traveltime tomography and waveform inversion for near-surface imaging." GEOPHYSICS 82, no. 4 (July 1, 2017): R245—R257. http://dx.doi.org/10.1190/geo2016-0576.1.

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Near-surface seismic imaging often plays a significant role in producing quality data processing results for the deep subsurface in land and shallow marine environments. First-arrival traveltime tomography is a common approach for near-surface imaging due to its high efficiency and simplicity. However, the method faces issues of missing hidden layers and resolving the structures with low resolution. On the other hand, waveform inversion should offer better solutions for dealing with these issues, but it may suffer from the cycle-skipping problem. We intend to use the advantages and reduce the disadvantages of the two methods by developing a new strategy of alternately applying traveltime tomography and waveform inversion through iterations. First-arrival traveltime tomography applies a wavefront raytracer and a nonlinear inversion approach. Waveform inversion is a multiscale approach in which a wavelet transform is applied in the data domain to better handle the cycle-skipping problem. By alternating the two inversions rather than performing a joint inversion, we reduce the memory requirements and avoid nonphysical scaling problems between the two approaches. Using one synthetic and two real data examples, we determine that alternating inversions minimize two separate objective functions at the same time and constrain the near-surface structures fairly well compared with the waveform inversion method alone. For the field examples, the new method avoids generating the obvious artifacts and provides results consistent with the geology analysis of those areas.
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Baglivo, Cristina, Marina Bonomolo, and Paolo Maria Congedo. "Modeling of Light Pipes for the Optimal Disposition in Buildings." Energies 12, no. 22 (November 13, 2019): 4323. http://dx.doi.org/10.3390/en12224323.

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A light pipe is an excellent solution to transport and distribute daylight into environments without or with little lighting, guaranteeing comfort inside the rooms. As stated in the literature, the evaluation of the performances of light pipes presents numerous complexities, making the work very difficult for technicians and designers. This study is aimed to present a methodology that is able to identify the potential of light pipes using indices such as daylight autonomy (DA), continuous daylight autonomy (DAc), and useful daylight illuminance (UDI). This paper presents an analysis of daylight obtained by several configurations of simple models of light pipes installed into a 5 × 5 m plant area room. All simulations are carried out in a DAYSIM environment, which allows calculating the annual availability of daylight based on a RADIANCE raytracer backward. Several daylight conditions were analyzed for different light pipe configurations, considering different pipe lengths and a variable number of light pipes. The light pipes are tested also in the horizontal position, for different orientations. The results of all the combinations were compared with the performances of a window with dimensions equal to 1/8 of the internal surface, which was in accordance with the minimum value to be guaranteed by the Italian Regulation (D.M. 5 July 1975 n. 190) for different orientations. The results indicated a difference in daylight distribution, showing a strong correlation between the percentage levels of DA and DAc with the length and number of pipes, during different periods of the year. The simulated model is strongly influenced by the aspect ratio (R = diameter/length). The results show that the illuminance levels decrease drastically, increasing the length.
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Kowalski, S. B., and H. A. Enge. "The ion-optical program raytrace." Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment 258, no. 3 (August 1987): 407. http://dx.doi.org/10.1016/0168-9002(87)90921-1.

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Khonkar, H. E. I., and A. A. M. Sayigh. "Raytrace for compound parabolic concentrator." Renewable Energy 5, no. 1-4 (August 1994): 376–83. http://dx.doi.org/10.1016/0960-1481(94)90400-6.

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Dissertations / Theses on the topic "Raytracer"

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Cooper, C., and n/a. "Space subdivision and distributed databases in a multiprocessor raytracer." University of Canberra. Information Sciences & Engineering, 1991. http://erl.canberra.edu.au./public/adt-AUC20060629.145540.

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This thesis deals with computer generated images. The thesis begins with an overview of a generalised computer graphics system, including a brief survey of typical methods for generating photorealistic images. One such technique, ray tracing, is used as the basis for the work which follows. The overview section concludes with a statement of the aim which is to: Investigate the effective use of available processing power and effective utilisation of available memory by implementing a ray tracing programme which uses space subdivision, multiple processors and a distributed world model database. The problem formulation section describes the ray tracing principle and then introduces the main areas of study. The INMOS Transputer (a building block for concurrent systems) is used to implement the multiple process ray tracer. Space subdivision is achieved by repeated and regular subdivision of a world cube (which contains the scene to be ray traced) into named cubes, called octrees. The subdivision algorithm continues to subdivide space until no octree contains more than a specified number of objects, or until the practical limit of space subdivision is reached. The objects in the world model database are distributed in a round robin manner to the ray trace processes. During execution of the ray trace programme, information about each object is passed between processes by a message mechanism. The concurrent code for the transputer processes, written in OCCAM 2, was developed using timing diagrams and signal flow diagrams derived by analogy from digital electronics. Structure diagrams, modified to be consistent with OCCAM 2 processes, were derived from the timing diagrams and signal flow diagrams. These were used as a basis for the coding. The results show that space subdivision is an effective use of processor power because the number of trial intersections of rays with objects is dramatically reduced. In addition, distribution of the world model database avoids duplication of the database in the memory of each process and hence better utilisation of available memory is achieved. The programmes are supported by a menu driven interface (running on a PC AT) which enables the user to control the ray trace processes running on the transputer board housed in the PC.
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Krivda, Marian. "Zobrazení kulečníku pomocí distribuovaného sledování paprsku." Master's thesis, Vysoké učení technické v Brně. Fakulta informačních technologií, 2009. http://www.nusl.cz/ntk/nusl-236657.

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This thesis is concerned in the method of realistic rendering using a distributed raytracing. This method simulates various visual effects and generates high realistic 2D images. The work analyses the problem and explains principles of solution related to this technique. There is also descriprion of the method of simple reytracing which provides a basis for the distributed raytracing. A part of work is specialized for optimalization of distributed raytracing.
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Heik, Andreas. "Multimedia unter Linux." Universitätsbibliothek Chemnitz, 2000. http://nbn-resolving.de/urn:nbn:de:bsz:ch1-200000205.

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Mit der Verbreitung von Linux als Desktopsystem steigen auch die Anforderungen des Nutzers an multimediale Fähigkeiten wie z.B. das Anhören eines digitalisierten Musikstückes, die Einbindung einer Digitalkamera in die Bildverarbeitung, die Nutzung einer Radio/TV-Karte oder gar das Bearbeiten eines kleinen Videofilms.
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Bose, Rahul. "Raytrace simulations and experimental studies of luminescent solar concentrators." Thesis, Imperial College London, 2012. http://hdl.handle.net/10044/1/23272.

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The luminescent solar concentrator is a planar, non-tracking device. Originally introduced more than three decades ago, it has yet to establish itself as a means of making photovoltaic solar energy more cost effective. Advances in organic luminescent centres, the emergence of inorganic nanocrystals and the development of new light trapping techniques have created promising opportunities for the LSC. This thesis investigates novel geometries and materials for the practical exploitation of LSCs. The research is based on experimental measurements as well as computational simulations using a Raytrace Model. It is shown both experimentally and computationally that a thin- lm structure produces the same effciency as a homogeneously doped LSC. Two building integrated applications are examined. The rst one is a power generating window employing a Lumogen Violet dye that absorbs short wavelength radiation and is mostly transparent in the visible. Annual yields of over 23 kWh/m2 and a conversion effciency of over 1% are predicted for a 50 cm by 50 cm device. The second BIPV application is the light-bar, which is designed to act as the secondary concentrator in a Venetian blind-like system. With linear Fresnel lenses producing a primary concentration factor of 20, an optimised system could generate nearly 60W/m^2 of power at an effciency of nearly 6% using direct sunlight only. Two novel luminescent materials, nanorods and phycobilisomes have been tested for their potential to reduce re-absorption losses. Despite current practical limitations, these materials are found to be promising due to enhanced Stokes shifts. LSCs with optical concentrations of 10 to 20 could be feasible by addressing the key shortcomings in the form of unabsorbed light and escape cone losses. Their versatility with regards to shape, colour and light absorption makes LSCs particularly relevant for building integrated photovoltaics.
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Straňák, Marek. "Raytracing na GPU." Master's thesis, Vysoké učení technické v Brně. Fakulta informačních technologií, 2011. http://www.nusl.cz/ntk/nusl-237020.

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Raytracing is a basic technique for displaying 3D objects. The goal of this thesis is to demonstrate the possibility of implementing raytracer using a programmable GPU. The algorithm and its modified version, implemented using "C for CUDA" language, are described. The raytracer is focused on displaying dynamic scenes. For this purpose the KD tree structure, bounding volume hierarchies and PBO transfer are used. To achieve realistic output, photon mapping was implemented.
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Hellman, Brandon, Erica Bosset, Luke Ender, Naveed Jafari, Phillip McCann, Chris Nguyen, Chris Summitt, Sunglin Wang, and Yuzuru Takashima. "3D visualization of optical ray aberration and its broadcasting to smartphones by ray aberration generator." SPIE-INT SOC OPTICAL ENGINEERING, 2017. http://hdl.handle.net/10150/627182.

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The ray formalism is critical to understanding light propagation, yet current pedagogy relies on inadequate 2D representations. We present a system in which real light rays are visualized through an optical system by using a collimated laser bundle of light and a fog chamber. Implementation for remote and immersive access is enabled by leveraging a commercially available 3D viewer and gesture-based remote controlling of the tool via bi-directional communication over the Internet.
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Books on the topic "Raytracer"

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Stabinger, Andreas. Raytrace Designer: Featuring Raytrace. Abacus Software Inc, 1993.

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Walnut, Creek. Raytrace!: The Official Pov-Ray Cdrom : Create Your Own 3-D Images With This Cdrom. Freebsd Mall, 1995.

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Book chapters on the topic "Raytracer"

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Smyk, Miłosław, Magdalena Szaber, and Radosław Mantiuk. "JaTrac — an exercise in designing educational raytracer." In Advanced Computer Systems, 303–11. Boston, MA: Springer US, 2002. http://dx.doi.org/10.1007/978-1-4419-8530-9_24.

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"RAYTRACE.H Header File." In Object-Oriented Graphics Programming in C++, 343–55. Elsevier, 1994. http://dx.doi.org/10.1016/b978-0-12-668318-9.50026-0.

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Conference papers on the topic "Raytracer"

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Esneault, David, Mitch Kopelman, and Jodi Whitsel. "How a CSG-based raytracer saves time." In ACM SIGGRAPH 2002 conference abstracts and applications. New York, New York, USA: ACM Press, 2002. http://dx.doi.org/10.1145/1242073.1242208.

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Foley, Tim, and Jeremy Sugerman. "KD-tree acceleration structures for a GPU raytracer." In the ACM SIGGRAPH/EUROGRAPHICS conference. New York, New York, USA: ACM Press, 2005. http://dx.doi.org/10.1145/1071866.1071869.

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Geise, Robert, Achim Enders, and Martin Bachhuber. "Bistatic RCS measurements of aircraft seat rows and their implementation in a raytracer." In 2012 6th European Conference on Antennas and Propagation (EuCAP). IEEE, 2012. http://dx.doi.org/10.1109/eucap.2012.6205959.

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Walder, Cordula, Jürgen Lacombe, Karsten von Maydell, and Carsten Agert. "Optical modeling of thin film silicon solar cells by combination of the transfer-matrix method and the Raytracer algorithm." In SPIE Photonics Europe, edited by Frank Wyrowski, John T. Sheridan, Jani Tervo, and Youri Meuret. SPIE, 2012. http://dx.doi.org/10.1117/12.921794.

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Andrewartha, Jesse, Søren Ragsdale, and Paul Beilby. "Raytracers and workflow." In ACM SIGGRAPH 2014 Courses. New York, New York, USA: ACM Press, 2014. http://dx.doi.org/10.1145/2614028.2615396.

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Shen, Wen-Hsuan, and Hsin-Mu Tsai. "RayTrack." In MobiSys '21: The 19th Annual International Conference on Mobile Systems, Applications, and Services. New York, NY, USA: ACM, 2021. http://dx.doi.org/10.1145/3458864.3466867.

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Woock, Philipp, and Jurgen Beyerer. "Seafloor shape estimation by raytraced kernels." In OCEANS 2014 - TAIPEI. IEEE, 2014. http://dx.doi.org/10.1109/oceans-taipei.2014.6964428.

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De Groot, Eric, Tamal Bose, Charlie Cooper, and Matt Kruse. "Remote Transmitter Tracking with Raytraced Fingerprint Database." In 2014 IEEE Military Communications Conference (MILCOM). IEEE, 2014. http://dx.doi.org/10.1109/milcom.2014.58.

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Bose, R., D. J. Farrell, A. J. Chatten, M. Pravettoni, A. Buchtemann, J. Quilitz, A. Fiore, L. Manna, and K. W. J. Barnham. "Luminescent solar concentrators: Nanorods and raytrace modeling." In 2008 33rd IEEE Photovolatic Specialists Conference (PVSC). IEEE, 2008. http://dx.doi.org/10.1109/pvsc.2008.4922450.

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Heideman, Kyle C., and John E. Greivenkamp. "Effect of alignment and tolerances on reverse raytrace calibration." In SPIE Optical Engineering + Applications, edited by Katherine Creath, Jan Burke, and Joanna Schmit. SPIE, 2014. http://dx.doi.org/10.1117/12.2064453.

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Reports on the topic "Raytracer"

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Patterson, W. L. Raytrace Technique for a Laterally Heterogeneous Environment - Software Document. Fort Belvoir, VA: Defense Technical Information Center, September 1990. http://dx.doi.org/10.21236/ada241589.

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