Efficient rendering of caustics with streamed photon mapping

Guzek, Krzysztof; Napieralski, Piotr

doi:10.1515/bpasts-2017-0040

Cited by 9 publications

(3 citation statements)

References 14 publications

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“…The same assumptions accompany the computational environment where such parameters as the number of analysed light rays, the number of iterations, the number of interactions of each ray with the environment, the density of computational mesh division, etc. are pre-defined [20]. Every simplifying assumption accepted at the initial stage of calculations means obtaining the results to a certain extent different from the results of laboratory measurements for the analogous optical systems of luminaires.…”

Section: Methods For Modelling Geometric-photometric Features Of Ligh...mentioning

confidence: 99%

Bulletin of the Polish Academy of Sciences: Technical Sciences

Żagan,

Zalewski,

Słomiński

et al. 2020

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This paper presents modern methods for designing optical systems for luminaires in the context of long years of light sources development. It shows that the development of technology for producing increasingly precise optical systems has led to an evolution in the construction of luminaires with increased efficacy and utilizing more efficiently the features of a specific family of light sources. Methods for designing and modelling optical systems with the use of mathematical curves as well as advanced the free-forming method are described. The paper also shows methods for modelling light sources features, especially luminance ones, designed to make precise simulation calculations required in any luminaire design process. Knowledge of luminance distributions of light sources and precise luminance distributions of optical systems for luminaires raises the design process to a very high level, enabling positive modern light source features, such as high luminance and their small dimensions, to be used consciously while minimizing negative ones, such as discomfort glare, caused by luminaires. The paper presents the results of simulation calculations and laboratory measurements for a selected case of luminaire equipped with a discharge lamp of maximum luminance exceeding 30 million cd/m 2 .

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Section: Methods For Modelling Geometric-photometric Features Of Ligh...mentioning

confidence: 99%

Bulletin of the Polish Academy of Sciences: Technical Sciences

Żagan,

Zalewski,

Słomiński

et al. 2020

View full text Add to dashboard Cite

show abstract

“…A series of problems in the practical application of "exclusive" and "special" design led to the emergence of general design, and then, this design concept was applied to residential design in the United States. In 2004, the US general design center formulated universal design in house based on this concept, which is a common residential design standard that combines the general design idea with ADA (Americans with Disabilities Act) to serve all people [5]. Its proposal means that the design of ordinary residential and outdoor environment does not have the specificity of the target population and should include all people with different physical functions and age characteristics.…”

Section: State Of the Artmentioning

confidence: 99%

Research on an Aging-Friendly Design of Urban Park Landscape Based on Computer Virtual Simulation Technology

Huang¹,

Ye²,

Liu

2022

Wireless Communications and Mobile Computing

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Influenced by economic development and the information society, more elderly people are more willing to go to urban parks for activities. Among them, comprehensive parks are the first choice for most elderly people. However, most urban parks are currently constructed according to adult. There are very few researches and practices on the age-appropriate design of urban parks, and the richness, safety, and comfort of the elderly’s activities cannot be guaranteed. In view of this situation, this paper studies the aging-appropriate design of urban comprehensive parks and proposes an aging-friendly design scheme for urban park landscapes based on computer virtual simulation technology from the four aspects of layout, type, distribution, and construction, systematically researched the activity space system for the elderly, and realized the virtual simulation display effect of urban park landscape. Research shows that the design scheme proposed in this paper solves the problem of interaction between buildings and users, breaks the traditional landscape design presentation form, and saves the cost of modification and production of traditional models, which is suitable for the aging and popularization of future urban park projects, providing an effective reference.

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“…With the iterative method, the optimum solutions often meeting the complex assumptions in fields such as automotive lighting, road lighting or asymmetrical surface lighting were reached. The dynamic development of computers, knowledge how the light is distributed and how it interacts with the materials reflecting and transmitting the luminous flux allowed us to effectively simulate optical systems [11][12][13]. To a great extent, it reduced the time required to design the luminaires and then minimized the prototype production needs.…”

Section: Introductionmentioning

confidence: 99%

Bulletin of the Polish Academy of Sciences: Technical Sciences

Słomiński¹

2019

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Designing, optimizing and analyzing optical systems as part of the implementation process into production of modern luminaires require using advanced simulation and computational methods. The progressive miniaturization of LED (light emitting diode) chips and growth in maximum luminance values, achieving up to 10 8 cd/m 2 , require constructing very accurate geometries of reflector and lens systems producing complex luminous intensity distributions while reducing discomfort glare levels. Currently, the design process cannot function without advanced simulation methods. Today's simulation methods in the lighting technology offer very good results as far as relatively large conventional light sources such as halogen lamps, metal halide lamps and high pressure sodium lamps are concerned. Unfortunately, they often fail in the case of chip-on-board LED light sources whose luminous surface dimensions are increasingly often contained inside a cube of the side length below 1mm. With the high sensitivity of such small chips and lenses with dimensions ranging from a just a few to between 10 and 20 mm, which is presented in this paper, modern luminance distribution measurement methods, luminance modelling and ray tracing methods should be used to minimize any errors arising from incorrectly projecting the design in the final physical model. Also, very importantly, focus should be directed towards reducing a chance of making a mistake while collimating the position of the light source inside the optical system. The paper presents a novel simulation calculation method enriched with an analysis of optical system sensitivity to a light source position. The results of simulation calculations are compared with the results of laboratory measurements for corresponding systems.

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Efficient rendering of caustics with streamed photon mapping

Cited by 9 publications

References 14 publications

Bulletin of the Polish Academy of Sciences: Technical Sciences

Bulletin of the Polish Academy of Sciences: Technical Sciences

Research on an Aging-Friendly Design of Urban Park Landscape Based on Computer Virtual Simulation Technology

Bulletin of the Polish Academy of Sciences: Technical Sciences

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