Strategies for Interactive Exploration of 3D Flow Using Evenly-Spaced Illuminated Streamlines
Helwig Hauser, and
Meister Eduard Gröller
Project Duration: 2002-2003
This paper presents several strategies to interactively explore 3D
flow. Based on a fast illuminated streamlines algorithm, standard
graphics hardware is sufficient to gain interactive rendering
rates. Our approach does not require the user to have any prior
knowledge of flow features. After the streamlines are computed in a
short preprocessing time, the user can interactively change appearance
and density of the streamlines to further explore the flow. Most
important flow features like velocity or pressure not only can be
mapped to all available streamline appearance properties like
streamline width, material, opacity, but also to streamline
density. To improve spatial perception of the 3D flow we apply
techniques based on animation, depth cueing, and halos along a
streamline if it is crossed by another streamline in the
foreground. Finally, we make intense use of focus+context methods like
magic volumes, region of interest driven streamline placing, and
spotlights to solve the occlusion problem.
Keywords: 3D flow visualization, illuminated streamlines, interactive exploration, focus+context visualization
Download the paper
Oliver Mattausch, Thomas Theußl, Helwig Hauser, and Meister Eduard
Gröller, "Strategies for Interactive Exploration of 3D Flow Using
Evenly-Spaced Illuminated Streamlines", to appear in Proceedings of
paper.pdf (722 kb)
Figures in the paper
Flow around a block with high and
low pressure coded as different colors and transparencies.
Lorenz system with focus region without end tapering
(top) and with end tapering (bottom). Note the un-pleasing
streamline endings at the focus region borders and streamline
endings in general in the upper image.
Color coded velocity with a continuous transfer function in the
vicinity of the block.
Catalytic converter with z-orientation as three scalar regions.
Note the turbulence where the flow enters the converter.
Smog over Europe, orientation in y-axis coded with 3 scalar
Flow around block with opacity function showing direction. Position in y direction is coded as scalar
The Lorenz system with color coded depth.
The Lorenz system without halos (top) and with halos (bottom).
Flow around block with rectangular prism as magic volume (volume
shown as geometry) and color coded pressure.
Flow around block with sharp border magic volume (top)
and smooth border magic volume (bottom).
Magic volume used as seeding region (drawn green) in streamline
calculation for the flow around block.
Flow around a block with three interval regions and pressure mapped to
Spotlight shining on the t-junction data set.
Additional information, images, source code, and the executable can be found