Real-Time Rendering and Manipulation of Large Terrains

Bhattacharjee, S.; Patidar, Suryakant; Narayanan, P. J.

doi:10.1109/icvgip.2008.85

Cited by 8 publications

(6 citation statements)

References 12 publications

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“…There are some studies for terrain rendering that allows editing and deformation on the terrain surface. Bhattacharjee et al (2008) describe a GPU-based system to store, render, and manipulate the terrains using a regular-grid representation. De Carpentier and Bidarra (2009) propose procedural brushes that combine local and global approaches for editing terrain surfaces used for game applications.…”

Section: Terrain Renderingmentioning

confidence: 99%

A hybrid representation for modeling, interactive editing, and real-time visualization of terrains with volumetric features

Koca

Güdükbay

2014

International Journal of Geographical Information Science

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Terrain rendering is a crucial part of many real-time applications. The easiest way to process and visualize terrain data in real time is to constrain the terrain model in several ways. This decreases the amount of data to be processed and the amount of processing power needed, but at the cost of expressivity and the ability to create complex terrains. The most popular terrain representation is a regular 2D grid, where the vertices are displaced in a third dimension by a displacement map, called a heightmap. This is the simplest way to represent terrain, and although it allows fast processing, it cannot model terrains with volumetric features. Volumetric approaches sample the 3D space by subdividing it into a 3D grid and represent the terrain as occupied voxels. They can represent volumetric features but they require computationally intensive algorithms for rendering, and their memory requirements are high. We propose a novel representation that combines the voxel and heightmap approaches, and is expressive enough to allow creating terrains with caves, overhangs, cliffs, and arches, and efficient enough to allow terrain editing, deformations, and rendering in real time. © 2014 Taylor & Francis

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Section: Terrain Renderingmentioning

confidence: 99%

A hybrid representation for modeling, interactive editing, and real-time visualization of terrains with volumetric features

Koca

Güdükbay

2014

International Journal of Geographical Information Science

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“…Thus, for some simple editing operations the propagation of changes is not required. Bhattacharjee et al [BPN08] apply the editing operations directly on the GPU, but then also perform the propagation of changes on the CPU. In both cases, the finest resolution level has to be available in CPU memory.…”

Section: Related Workmentioning

confidence: 99%

Interactive Editing of GigaSample Terrain Fields

Treib

Reichl

Auer

et al. 2012

Computer Graphics Forum

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Figure 1: A terrain field of over 300 gigasamples (left). Direct editing using a paint and displacement brush (right) and simultaneous rendering of the resulting changes is performed at 60 fps on a 1920×1080 viewport using our approach. AbstractPrevious terrain rendering approaches have addressed the aspect of data compression and fast decoding for rendering, but applications where the terrain is repeatedly modified and needs to be buffered on disk have not been considered so far. Such applications require both decoding and encoding to be faster than disk transfer. We present a novel approach for editing gigasample terrain fields at interactive rates and high quality. To achieve high decoding and encoding throughput, we employ a compression scheme for height and pixel maps based on a sparse wavelet representation. On recent GPUs it can encode and decode up to 270 and 730 MPix/s of color data, respectively, at compression rates and quality superior to JPEG, and it achieves more than twice these rates for lossless height field compression. The construction and rendering of a height field triangulation is avoided by using GPU ray-casting directly on the regular grid underlying the compression scheme. We show the efficiency of our method for interactive editing and continuous level-of-detail rendering of terrain fields comprised of several hundreds of gigasamples.

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“…(Dan et al, 2009) discuss various ways of terrain editing, including geometric editing and texture editing. Similar to (Bhattacharjee et al, 2008), they also modify the height point, but add natural looking variations by defining new height values using an outer and inner radius and a parameter determining the radius. We add to this work by providing an incremental update technique which enables interactive terrain modelling by minimizing data transfer and data structure updates in GPU memory.…”

Section: Literature Reviewmentioning

confidence: 99%

“…(Atlan and Garland, 2006) modify the terrain in realtime by specifying editing strokes, in which quadtree hierarchy is used to represent the heightmap for multiresolution editing. (Bhattacharjee et al, 2008) improve performance by utilising the GPU for rendering and editing the terrain simultaneously. The authors use a fragment shader to operate on each height value, and every time the terrain undergoes deformation or modification, the parameters of the actual process are parsed into the shader, which could be a result of simulation of terrain dynamics or direct editing performed by user using input devices such as mice.…”

Section: Literature Reviewmentioning

confidence: 99%

Real-Time Terrain Rendering With Incremental Loading for Interactive Terrain Modelling

Hurk

Yuen

Wünsche

2011

Proceedings of the International Conference on Computer Graphics Theory and Applications

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Abstract:Real-time terrain rendering techniques usually employ static data structures and do not allow interactive modification of the terrain. In this paper we describe a real-time geometric clipmapping terrain rendering technique for large terrains which allows incremental updates of the underlying data structure. We have combined the method with an interactive sketch-based terrain modelling technique. The clipmap data structure is updated during runtime to synchronise the terrain visualization with changes to the underlying digital elevation map.Tests and examples demonstrate the advantages of our method over traditional approaches. Disadvantages and limitations are discussed and suggestions for future work are presented.

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Real-Time Rendering and Manipulation of Large Terrains

Abstract: Abstract

Cited by 8 publications

References 12 publications

A hybrid representation for modeling, interactive editing, and real-time visualization of terrains with volumetric features

A hybrid representation for modeling, interactive editing, and real-time visualization of terrains with volumetric features

Interactive Editing of GigaSample Terrain Fields

Real-Time Terrain Rendering With Incremental Loading for Interactive Terrain Modelling

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