Dynamic parallax occlusion mapping with approximate soft shadows

Tatarchuk, Natalya

doi:10.1145/1111411.1111423

Cited by 77 publications

(60 citation statements)

References 15 publications

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“…On the other hand, all acceleration techniques for computing the intersection of a ray with the surface implicitly encoded by the distance map can be adopted to render our representation, by just projecting each sample along the ray onto the texture domain. These acceleration methods include, among others, linear search plus binary search refinement (Policarpo et al, 2005), varying sampling rates (Tatarchuk, 2006), and precomputed distance maps (Baboud and Décoret, 2006;Donnelly, 2005).…”

Section: Previous Workmentioning

confidence: 99%

Relief Mapping on Cubic Cell Complexes

2010

Proceedings of the International Conference on Computer Graphics Theory and Applications

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Abstract:In this paper we present an algorithm for parameterizing arbitrary surfaces onto a quadrilateral domain defined by a collection of cubic cells. The parameterization inside each cell is implicit and thus requires storing no texture coordinates. Based upon this parameterization, we propose a unified representation of geometric and appearance information of complex models. The representation consists of a set of cubic cells (providing a coarse representation of the object) together with a collection of distance maps (encoding fine geometric detail inside each cell). Our new representation has similar uses than geometry images, but it requires storing a single distance value per texel instead of full vertex coordinates. When combined with color and normal maps, our representation can be used to render an approximation of the model through an output-sensitive relief mapping algorithm, thus being specially amenable for GPU raytracing.

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Section: Previous Workmentioning

confidence: 99%

Relief Mapping on Cubic Cell Complexes

2010

Proceedings of the International Conference on Computer Graphics Theory and Applications

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“…By calling it with the Light vector (pointing from the shaded point to the light source) instead of the View vector, it is possible to decide whether the shaded point is in shadow or not (figure 33). Using more than one light vector per light source, even soft shadows can be generated [Tat06a,Tat06b]. We note that shadows can also be burnt into the information associated with the texels, as happens in the case of bi-directional texture functions.…”

Section: Self-shadowing Computationmentioning

confidence: 99%

Displacement Mapping on the GPU — State of the Art

Szirmay‐Kalos¹,

Umenhoffer²

2008

Computer Graphics Forum

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“…Of particular interest are the variety of new local ray-tracing techniques, which use the traditional graphics hardware pipeline to render simple primitives which serve as bounding boxes on the true surface being rendered. For each point on the bounding surface, the GPU pixel-level processors compute viewing ray-object intersection locally inside each bounding box [Policarpo et al 2005;Tatarchuk 2006;Ritsche 2006;Loop and Blinn 2006]. This technique forms the basis of our method, which creates a regular grid of polynomial surfaces, called Bézier Tetrahedra, to represent the reconstructed surface and uses each tetrahedron as a local bounding box for ray tracing of the surface within.…”

Section: Introductionmentioning

confidence: 99%

Interactive volume isosurface rendering using BT volumes

Kloetzli¹,

Olano²,

Rheingans³

2008

Proceedings of the 2008 Symposium on Interactive 3D Graphics and Games

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This paper presents a volume representation format called BT Volumes, along with a technique to interactively render them and two methods to create useful data in BT Volume format, including high quality reconstruction filtering. Medical applications rely heavily on isosurface data to visualize anatomy, but current real-time isosurface rendering techniques such as Marching Cubes are limited in flexibility and provide only low-order linear reconstruction filtering. As an alternative to creating triangular geometry to represent the surface, we ray trace an exact isosurface directly inside a pixel shader. We construct a set of Bézier Tetrahedra to approximate any reconstruction filter with arbitrary footprint. We then precompute the volume convolved with this filter as a tetrahedral grid with Bézier weights that can be ray traced in graphics hardware. Our technique is fast, renders any isosurface level without additional work, and performs high quality reconstruction filtering with arbitrary footprints and reconstruction kernels.

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Dynamic parallax occlusion mapping with approximate soft shadows

Cited by 77 publications

References 15 publications

Relief Mapping on Cubic Cell Complexes

Relief Mapping on Cubic Cell Complexes

Displacement Mapping on the GPU — State of the Art

Interactive volume isosurface rendering using BT volumes

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