Hierarchical splatting: a progressive refinement algorithm for volume rendering
Proceedings of the 18th annual conference on Computer graphics and interactive techniques
VIS '99 Proceedings of the conference on Visualization '99: celebrating ten years
QSplat: a multiresolution point rendering system for large meshes
Proceedings of the 27th annual conference on Computer graphics and interactive techniques
Level-of-detail volume rendering via 3D textures
VVS '00 Proceedings of the 2000 IEEE symposium on Volume visualization
High-quality pre-integrated volume rendering using hardware-accelerated pixel shading
Proceedings of the ACM SIGGRAPH/EUROGRAPHICS workshop on Graphics hardware
Proceedings of the 29th annual conference on Computer graphics and interactive techniques
Interactive rendering of large volume data sets
Proceedings of the conference on Visualization '02
Interactive translucent volume rendering and procedural modeling
Proceedings of the conference on Visualization '02
Computing and Rendering Point Set Surfaces
IEEE Transactions on Visualization and Computer Graphics
Smart hardware-accelerated volume rendering
VISSYM '03 Proceedings of the symposium on Data visualisation 2003
Accelerating Volume Reconstruction With 3D Texture Hardware
Accelerating Volume Reconstruction With 3D Texture Hardware
Hierarchical Splatting of Scattered 4D Data
IEEE Computer Graphics and Applications
GPU Gems 2: Programming Techniques for High-Performance Graphics and General-Purpose Computation (Gpu Gems)
Acceleration Techniques for GPU-based Volume Rendering
Proceedings of the 14th IEEE Visualization 2003 (VIS'03)
Hardware-Based Ray Casting for Tetrahedral Meshes
Proceedings of the 14th IEEE Visualization 2003 (VIS'03)
Hierarchical Splatting of Scattered Data
Proceedings of the 14th IEEE Visualization 2003 (VIS'03)
Octree textures on graphics hardware
SIGGRAPH '05 ACM SIGGRAPH 2005 Sketches
Hardware-accelerated glyphs for mono- and dipoles in molecular dynamics visualization
EUROVIS'05 Proceedings of the Seventh Joint Eurographics / IEEE VGTC conference on Visualization
A scalable, hybrid scheme for volume rendering massive data sets
EG PGV'06 Proceedings of the 6th Eurographics conference on Parallel Graphics and Visualization
A simple and flexible volume rendering framework for graphics-hardware-based raycasting
VG'05 Proceedings of the Fourth Eurographics / IEEE VGTC conference on Volume Graphics
Volumetric evaluation of meshless data from smoothed particle hydrodynamics simulations
VG'10 Proceedings of the 8th IEEE/EG international conference on Volume Graphics
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In the recent years the advent of powerful graphics hardware with programmable pixel shaders enabled interactive raycasting implementations on low-cost commodity desktop computers. Unlike slice-based volume rendering approaches GPU-assisted raycasting does not suffer from rendering artifacts caused by varying sample distances along different ray-directions or limited frame-buffer precision. It further supports direct implementations of many sophisticated acceleration techniques and lighting models. In this paper we present a GPU-assisted raycasting approach for data that consists of volumetric fields defined on computational grids as well as unstructured point sets. We avoid resampling the point data onto proxy grids by directly encoding the point data in a GPU-octree data structure. This allows to efficiently access the (semitransparent) point data during ray traversal and correctly blend it with the grid data, yielding interactive, highquality rendering results. We discuss approaches to accelerate the rendering performance for larger point sets and give real world application examples to demonstrate the usefulness of our approach.