# The Inverse Warp: Non-Invasive Integration of Shear-Warp Volume Rendering
into Polygon Rendering Pipelines

## Stefan Bruckner, Dieter Schmalstieg, Helwig Hauser, M. Eduard
Gröller

**
CONFERENCE PAPER:
**
In *Proceedings of VMV 2003*, pp. 529–536, 2003.

### Abstract

In this paper, a simple and efficient solution for combining shear-warp
volume rendering and the hardware graphics pipeline is presented.
The approach applies an inverse warp transformation to the Z-Buffer,
containing the rendered geometry. This information is used for combining
geometry and volume data during compositing. We present applications
of this concept which include hybrid volume rendering, i.e., concurrent
rendering of polygonal objects and volume data, and volume clipping
on convex clipping regions. Furthermore, it can be used to efficiently
define regions with different rendering modes and transfer functions
for focus+context volume rendering. Empirical results show that the
approach has very low impact on performance.

### Published

**Proceedings of VMV 2003**

### Documents and Links

### Additional Media

### BibTeX

@INPROCEEDINGS{Bruckner-2003-IWN,
author = {Stefan Bruckner and Dieter Schmalstieg and Helwig Hauser and M. Eduard
Gr{\"o}ller},
title = {The Inverse Warp: Non-Invasive Integration of Shear-Warp Volume Rendering
into Polygon Rendering Pipelines},
booktitle = {Proceedings of VMV 2003},
year = {2003},
editor = {T. Ertl, B. Girod, G. Greiner, H. Niemann, H.-P. Seidel, E. Steinbach,
R. Westermann},
pages = {529--536},
month = nov,
publisher = {infix},
abstract = {In this paper, a simple and efficient solution for combining shear-warp
volume rendering and the hardware graphics pipeline is presented.
The approach applies an inverse warp transformation to the Z-Buffer,
containing the rendered geometry. This information is used for combining
geometry and volume data during compositing. We present applications
of this concept which include hybrid volume rendering, i.e., concurrent
rendering of polygonal objects and volume data, and volume clipping
on convex clipping regions. Furthermore, it can be used to efficiently
define regions with different rendering modes and transfer functions
for focus+context volume rendering. Empirical results show that the
approach has very low impact on performance.},
isbn = {3898380483},
keywords = {focus+context techniques, clipping, hybrid volume rendering},
url = {http://www.cg.tuwien.ac.at/research/publications/2003/Bruckner-2003-The/}
}