Boat, wake, and wave real-time simulation

Swierkowski, Leszek; Gouthas, Efthimios; Christie, Chad L.; Williams, Owen M.

doi:10.1117/12.818430

Cited by 3 publications

(10 citation statements)

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“…The simulation then propagates the waves from frame to frame by applying a Fast Fourier Transform (FFT), based on a realistic dispersion relation for deep water waves. 1,3,7,8 In the current version of VIROcean, proficient use of GPU resources (where four FFTs run in parallel) allows the propagation of ocean waves covering wavelengths from as short as several millimetres to up to a few kilometres. Short wavelengths (capillary waves) are important for reproducing ocean surface optical effects, especially reflection, and contribute significantly to the radiometric accuracy of the rendered scene.…”

Section: Ocean Surface Simulationmentioning

confidence: 99%

“…For real-time simulation, we currently adopt an approximate approach that models a complex water surface disturbance as a combination of a large number of individual local disturbances (wave particles). 1,3,9 The starting point is the computation of the water volume displaced by each facet of the moving hull during a simulation time interval. Wave particles are launched around the hull, the amplitude of each being proportional to the local volume disturbance.…”

Section: Ship Wake Simulationmentioning

confidence: 99%

“…[1][2][3][4][5][6] It is designed to provide closed-loop dynamic simulations of complex scenarios that include moving objects, composite backgrounds, sources of radiation and precise radiometry. The main simulation scenarios may be classified into the following three groups: (1) air scenario with aircrafts and backgrounds, (2) maritime scenario with boats, ships and ocean waves, and (3) land scenario with land objects in composite terrain environments.…”

Section: Virsuite Overviewmentioning

confidence: 99%

“…VIRSuite is a real-time scene generator, designed to provide closed-loop dynamic simulation of complex scenarios that may be classified into the following three groups: (1) air scenario with aircraft and backgrounds, (2) maritime scenario with boats, ships and ocean waves, (3) land scenario with land objects in composite terrain environments. [1][2][3][4][5][6] Initially, VIRSuite was developed for generating imagery for aircraft scenarios in the MWIR band only. It was later extended to generate MWIR, LWIR, visual scenery and range imagery for LADAR scene generation.…”

Section: Introductionmentioning

confidence: 99%

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Real-time scene and signature generation for ladar and imaging sensors

et al. 2014

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This paper describes development of two key functionalities within the VIRSuite scene simulation program, broadening its scene generation capabilities and increasing accuracy of thermal signatures. Firstly, a new LADAR scene generation module has been designed. It is capable of simulating range imagery for Geiger mode LADAR, in addition to the already existing functionality for linear mode systems. Furthermore, a new 3D heat diffusion solver has been developed within the VIRSuite signature prediction module. It is capable of calculating the temperature distribution in complex three-dimensional objects for enhanced dynamic prediction of thermal signatures. With these enhancements, VIRSuite is now a robust tool for conducting dynamic simulation for missiles with multi-mode seekers.

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Section: Ocean Surface Simulationmentioning

confidence: 99%

Section: Ship Wake Simulationmentioning

confidence: 99%

Section: Virsuite Overviewmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Real-time scene and signature generation for ladar and imaging sensors

et al. 2014

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“…Lining Chen, Yicheng Jin, and Yong Yin T Swierkowski et al [23] generated the ship wave on the IFFT sea surface. Weerasinghe et al [24] combined the IFFT Gerstner wave with 6-DOF (degree of freedom) ship motion model.…”

Section: Amplitude Malformation In the Ifft Ocean Wave Rendering Undementioning

confidence: 99%

Amplitude Malformation in the IFFT Ocean Wave Rendering under the Influence of the Fourier Coefficient

Chen¹,

Ye²,

Yong³

2014

ELS

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Although Tessendorf’s IFFT Gerstner wave model hasbeen widely used, the value of A, a constant of the Fouriercoefficient, is not given. A will strongly influence the shape of therendered ocean wave and even cause amplitude malformation.We study the algorithm of the IFFT Gerstner wave, and give themethod of A calculating. The method of the paper can guaranteethere is no amplitude malformation in rendered ocean waves. Theexpression of the IFFT Gerstner wave with the amplitude of thecosine wave is derived again. The definite integral of the wavenumber spectrum is discretized. Further, another expression ofthe IFFT Gerstner wave is gotten. The Fourier coefficient of theexpression contains the wave number spectrum and the area ofthe discrete integral domain. The method makes the shape of thegenerated wave stable. Comparing Tessdendorf’s method with themethod of the paper, we find that the expression of A shouldcontain the area of the discrete integral domain and the spectralconstant of the wave number spectrum. If A contains only thespectral constant, the amplitude malformation may occur. Byreading some well known open source codes, we find that the codeauthors adopted some factitious methods to suppress themalformed amplitude Obviously, the code authors have alreadynoticed the phenomenon of the malformation, but not probed thecause. The rendering results of the codes are close to that of themethod of the paper. Furthermore, the wave potential iscomputed using the Gerstner wave model directly, the author findit is quite close to that of the paper. The experimental results andcomparisons show that the method of the paper correctlycomputes the wave potential and effectively solves the problem ofamplitude malformation.

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Comparison of GPU and FPGA hardware for HWIL scene generation and image processing

Eales

Swierkowski

2009

SPIE Proceedings

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Boat, wake, and wave real-time simulation

Cited by 3 publications

References 0 publications

Real-time scene and signature generation for ladar and imaging sensors

Real-time scene and signature generation for ladar and imaging sensors

Amplitude Malformation in the IFFT Ocean Wave Rendering under the Influence of the Fourier Coefficient

Comparison of GPU and FPGA hardware for HWIL scene generation and image processing

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