Interactive landscape visualization using GPU ray casting

Mantler, Stephan; Jeschke, Stefan

doi:10.1145/1174429.1174448

Cited by 9 publications

(8 citation statements)

References 30 publications

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“…Sometimes ray-casting, which is primarily used in volume rendering, is used for urban rendering, for example, Crassin et al [2009] and Zhou et al [2008]. GPU-based ray casting has also been used for rendering height fields [Mantler and Jeschke 2006;Dick et al 2009]; for adding surface details [Jeschke et al 2007]; and for rendering urban models [Ali et al 2009;Marvie et al 2011;Cignoni et al 2007]. …”

Section: Related Workmentioning

confidence: 99%

A compact random-access representation for urban modeling and rendering

Zhengzheng

Chan

et al. 2013

ACM Trans. Graph.

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Figure 1: Left: a city scene with 5,061 distinct buildings represented using our proposed Non-Uniform Textures (NUTs). The size of this digital model is 42 MB, compressible to 10.6MB PNG files. This model is rendered at 49 fps @ 1280 × 720 on an NVidia GTX580 GPU. An equivalent mesh-based model has 671 million triangles (37GB). Right: a much larger European-style city with 40,400 distinct buildings. This model consists of NUTs (229MB) and a complementary mesh (300MB) for roof structures. The total PNG-compressed NUT file size is 60.5MB. It is rendered at 30 fps. An equivalent mesh model has 1.36 billion triangles, or 61GB. AbstractWe propose a highly memory-efficient representation for modeling and rendering urban buildings composed predominantly of rectangular block structures, which can be used to completely or partially represent most modern buildings. With the proposed representation, the data size required for modeling most buildings is more than two orders of magnitude less than using the conventional mesh representation. In addition, it substantially reduces the dependency on conventional texture maps, which are not space-efficient for defining visual details of building facades. The proposed representation can be stored and transmitted as images and can be rendered directly without any mesh reconstruction. A ray-casting based shader has been developed to render buildings thus represented on the GPU with a high frame rate to support interactive fly-by as well as streetlevel walk-through. Comparisons with standard geometric representations and recent urban modeling techniques indicate the proposed representation performs well when viewed from a short and long distance.

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Section: Related Workmentioning

confidence: 99%

A compact random-access representation for urban modeling and rendering

Zhengzheng

Chan

et al. 2013

ACM Trans. Graph.

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“…This drastically reduces the geometric complexity, but the distribution of trees and the forest boundaries are difficult to control below the scale of patches. The canopy can also be represented with a height field, rendered with relief mapping [MJ06]. User control is easier but only far views are supported.…”

Section: Forest Representationsmentioning

confidence: 99%

Real‐time Realistic Rendering and Lighting of Forests

Bruneton

Neyret

2012

Computer Graphics Forum

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Special issue: Proceedings of Eurographics 2011International audienceRealistic real-time rendering and lighting of forests is an important aspect for simulators and video games. This is a difficult problem, due to the massive amount of geometry: aerial forest views display millions of trees on a wide range of distances, from the camera to the horizon. Light interactions, whose effects are visible at all scales, are also a problem: sun and sky dome contributions, shadows between trees, inside trees, on the ground, and view-light masking correlations. In this paper we present a method to render very large forest scenes in realtime, with realistic lighting at all scales, and without popping nor aliasing. Our method is based on two new forest representations, z-fields and shader-maps, with a seamless transition between them. Our first model builds on light fields and height fields to represent and render the nearest trees individually, accounting for all lighting effects. Our second model is a location, view and light dependent shader mapped on the terrain, accounting for the cumulated subpixel effects. Qualitative comparisons with photos show that our method produces realistic results

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“…Each pass of our algorithm is performed on a differentpositive-axis of the tridimensional space (+X, +Y, and +Z), applying a technique known as ray casting to obtain the volumetric information [17]. This technique involves the testing of the intersection between multiple lines (called rays) and the surface of a model and has been widely used in computer graphics for multiple purposes [18], [19], [20].…”

Section: Fault-tolerant Voxelizationmentioning

confidence: 99%

Fault-tolerant defect prediction in high-precision foundry

Salazar

Gallego

Penya

et al. 2010

2010 8th IEEE International Conference on Industrial Informatics

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High-precision foundry production is subjected to rigorous quality controls in order to ensure a proper result. Such exams, however, are extremely expensive and only achieve good results in a posteriori fashion. In previous works, we presented a defect prediction system that achieved a 99% success rate. Still, this approach did not take into account sufficiently the geometry of the casting part models, resulting in higher raw material requirements to guarantee an appropriate outcome. In this paper, we present here a fault-tolerant software solution for casting defect prediction that is able to detect possible defects directly in the design phase by analysing the volume of threedimensional models. To this end, we propose advanced algorithms to recreate the topology of each foundry part, analyze its volume and simulate the casting procedure, all of them specifically designed for an robust implementation over the latest graphic hardware that ensures an interactive design process.

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Interactive landscape visualization using GPU ray casting

Cited by 9 publications

References 30 publications

A compact random-access representation for urban modeling and rendering

A compact random-access representation for urban modeling and rendering

Real‐time Realistic Rendering and Lighting of Forests

Fault-tolerant defect prediction in high-precision foundry

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