Cinematic Scientific Visualization in Houdini Kalina Borkiewicz + - - PowerPoint PPT Presentation

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Cinematic Scientific Visualization in Houdini Kalina Borkiewicz + - - PowerPoint PPT Presentation

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Cinematic Scientific Visualization in Houdini Kalina Borkiewicz + AJ Christensen Advanced Visualization Lab National Center for Supercomputing Applications University of Illinois at Urbana-Champaign Vocabulary Renaissance Team n. 1. A

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Cinematic Scientific Visualization in Houdini

Kalina Borkiewicz + AJ Christensen

Advanced Visualization Lab National Center for Supercomputing Applications University of Illinois at Urbana-Champaign

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Vocabulary

Renaissance Team n. 1. A cross-disciplinary group of experts in science, technology, and art, who work together to build extremely effective science outreach projects.

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Vocabulary

Cinematic Scientific Visualization n. 1. Production-quality, data-driven imagery created with movie-making tools with good composition, camera direction, and artistic aesthetics suitable for distribution in immersive giant screen theaters.

Scientific Visualization n. 1. Imagery created using data with spatial 3D coordinates,

  • ften calculated on large

computing clusters. Information Visualization n. 1. Imagery created using relational data which often has no direct mapping to spatial coordinates. Scientific Illustration n. 1. Imagery created based on expert input but using predominantly artistic tools.

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Cinematic Sci Vis

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Demo Reel Video

https://youtu.be/T_0ICxROM0Q

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Recent Examples

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2.8 TB 1794 577R x 384θ x 432φ 1x - 6.25x solar radius 100 minutes Yuhong Fan

  • Nat. Center for Atmos. Research

Yellowstone, NWSC/NCAR and Discover, NASA Center for Climate Simulation

SIMULATION

STATS

DATA SIZE TIME STEPS RESOLUTION SPATIAL SCALE TIME SCALE SCIENTIST INSTITUTION SUPERCOMPUTER

BIG DATA

Double Coronal Mass Ejection

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BIG DATA

El Reno Tornado - May 24, 2011

160 TB 4895 1500 x 1500 x 380 stretch grid 120km x 120km x 120km 2 hours Leigh Orf University of Wisconsin-Madison Blue Waters, University of Illinois

SIMULATION

STATS

DATA SIZE TIME STEPS RESOLUTION SPATIAL SCALE TIME SCALE SCIENTIST INSTITUTION SUPERCOMPUTER

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BIG DATA

Photosynthetic Organelle

60 TB ~100,000 ~100,000,000 atoms 1 Angstrom (1e-10 m) 1 femtosecond (1e-15 s) Klaus Schulten University of Illinois at U-C Blue Waters and Titan

SIMULATION

STATS

DATA SIZE TIME STEPS RESOLUTION SPATIAL SCALE TIME SCALE SCIENTIST INSTITUTION SUPERCOMPUTER

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Scientific Visualization Tools

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VMD VAPOR

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Houdini Nuke After Effects

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scene file SOPs ROPs SHOPs CHOPs

SOP nodes Sub- networks parameters SOP nodes Sub- networks parameters SOP nodes Sub- networks parameters SOP nodes Sub- networks parameters

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The Houdini Paradigm

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Houdini Demos

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Demo: Deriving Geometry from Data

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Demo: Working with External Assets

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Demo: Volume and Geometry Manipulation

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Programming in Houdini

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Ways to Get Your Data into Houdini A) Custom C++ Plugins B) Scripting C) Ytini

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Ways to Get Your Data into Houdini A) Custom C++ Plugins B) Scripting C) Ytini

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Custom C++ Plugins

Houdini Development Kit (HDK)

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Custom C++ Plugins

Houdini Development Kit (HDK)

  • Built directly into Houdini, and works seamlessly just like any other feature,

without extra or external steps

  • Great if you also need custom artistic controls, beyond just reading the data

○ Resolution ○ Interpolation ○ Edge falloff ○ Isovolumes ○ ...

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Custom C++ Plugins

Houdini Development Kit (HDK)

  • Built directly into Houdini, and works seamlessly just like any other feature,

without extra or external steps

  • Great if you also need custom artistic controls, beyond just reading the data

○ Resolution ○ Interpolation ○ Edge falloff ○ Isovolumes ○ ...

  • Downsides:

○ More programming-intensive than some other solutions ○ Needs to be updated with every Houdini version

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Ways to Get Your Data into Houdini A) Custom C++ Plugins B) Scripting C) Ytini

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Scripting

  • One-time conversion of data into a Houdini-compatible format

○ Have to re-run if you want to make changes

  • You can write an external script, or code in Python directly in Houdini
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Scripting

  • Write script snippets directly in the parameters
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Scripting

  • Write script snippets directly in the parameters
  • Create your own SOP
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Scripting

  • Write script snippets directly in the parameters
  • Create your own SOP
  • Code directly inside Houdini
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Example .geo volume file

PGEOMETRY V2 NPoints 1 NPrims 1 NPointGroups 0 NPrimGroups 0 NPointAttrib 0 NVertexAttrib 0 NPrimAttrib 0 NAttrib 0 0 0 0 1 Volume 0 1 0 0 0 1 0 0 0 1 -2 2 2 2 constant 0 0 smoke 0 1 0 1 0 1 0 1 0 1 beginExtra endExtra

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Example .geo volume file

PGEOMETRY V2 ← Header NPoints 1 NPrims 1 NPointGroups 0 NPrimGroups 0 NPointAttrib 0 NVertexAttrib 0 NPrimAttrib 0 NAttrib 0 0 0 0 1 Volume 0 1 0 0 0 1 0 0 0 1 -2 2 2 2 constant 0 0 smoke 0 1 0 1 0 1 0 1 0 1 beginExtra endExtra

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Example .geo volume file

PGEOMETRY V2 NPoints 1 NPrims 1 ← 1 point that defines the center, 1 primitive that is our data volume NPointGroups 0 NPrimGroups 0 NPointAttrib 0 NVertexAttrib 0 NPrimAttrib 0 NAttrib 0 0 0 0 1 Volume 0 1 0 0 0 1 0 0 0 1 -2 2 2 2 constant 0 0 smoke 0 1 0 1 0 1 0 1 0 1 beginExtra endExtra

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Example .geo volume file

PGEOMETRY V2 NPoints 1 NPrims 1 NPointGroups 0 NPrimGroups 0 ← 0 groups NPointAttrib 0 NVertexAttrib 0 NPrimAttrib 0 NAttrib 0 ← 0 extra attributes 0 0 0 1 Volume 0 1 0 0 0 1 0 0 0 1 -2 2 2 2 constant 0 0 smoke 0 1 0 1 0 1 0 1 0 1 beginExtra endExtra

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Example .geo volume file

PGEOMETRY V2 NPoints 1 NPrims 1 NPointGroups 0 NPrimGroups 0 NPointAttrib 0 NVertexAttrib 0 NPrimAttrib 0 NAttrib 0 0 0 0 1 ← Center point at (0,0,0) * 1 Volume 0 1 0 0 0 1 0 0 0 1 -2 2 2 2 constant 0 0 smoke 0 1 0 1 0 1 0 1 0 1 beginExtra endExtra

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Example .geo volume file

PGEOMETRY V2 NPoints 1 NPrims 1 NPointGroups 0 NPrimGroups 0 NPointAttrib 0 NVertexAttrib 0 NPrimAttrib 0 NAttrib 0 0 0 0 1 Volume 0 1 0 0 0 1 0 0 0 1 -2 2 2 2 constant 0 0 smoke 0 1 ← Volume definition 0 1 0 1 0 1 0 1 beginExtra endExtra

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Example .geo volume file

PGEOMETRY V2 NPoints 1 NPrims 1 NPointGroups 0 NPrimGroups 0 NPointAttrib 0 NVertexAttrib 0 NPrimAttrib 0 NAttrib 0 0 0 0 1 Volume 0 1 0 0 0 1 0 0 0 1 -2 2 2 2 constant 0 0 smoke 0 1 0 1 0 1 0 1 0 1 beginExtra endExtra XYZ Resolution: 2x2x2

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PGEOMETRY V2 NPoints 1 NPrims 1 NPointGroups 0 NPrimGroups 0 NPointAttrib 0 NVertexAttrib 0 NPrimAttrib 0 NAttrib 0 0 0 0 1 Volume 0 1 0 0 0 1 0 0 0 1 -2 2 2 2 constant 0 0 smoke 0 1 0 1 0 1 0 1 0 1 beginExtra endExtra Transformation matrix = = identity matrix, which does nothing (no scaling, translating, rotating)

[ ]

Example .geo volume file

1 0 0 0 1 0 0 0 1

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Example .geo volume file

PGEOMETRY V2 NPoints 1 NPrims 1 NPointGroups 0 NPrimGroups 0 NPointAttrib 0 NVertexAttrib 0 NPrimAttrib 0 NAttrib 0 0 0 0 1 Volume 0 1 0 0 0 1 0 0 0 1 -2 2 2 2 constant 0 0 smoke 0 1 0 1 0 1 0 1 0 1 beginExtra endExtra Other fancy settings include:

  • Whether to taper the volume and how much
  • What values to set past the border of the volume
  • How much lossy compression is allowed
  • And more… Described in “GPD.txt” file that comes with Houdini
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Example .geo volume file

PGEOMETRY V2 NPoints 1 NPrims 1 NPointGroups 0 NPrimGroups 0 NPointAttrib 0 NVertexAttrib 0 NPrimAttrib 0 NAttrib 0 0 0 0 1 Volume 0 1 0 0 0 1 0 0 0 1 -2 2 2 2 constant 0 0 smoke 0 1 0 1 0 1 0 1 0 1 ← The data beginExtra endExtra

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Example .geo volume file

PGEOMETRY V2 NPoints 1 NPrims 1 NPointGroups 0 NPrimGroups 0 NPointAttrib 0 NVertexAttrib 0 NPrimAttrib 0 NAttrib 0 0 0 0 1 Volume 0 1 0 0 0 1 0 0 0 1 -2 2 2 2 constant 0 0 smoke 0 1 0 1 0 1 0 1 0 1 ← The data. 8 numbers, as defined by the 2*2*2 resolution beginExtra endExtra

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Example .geo volume file

PGEOMETRY V2 NPoints 1 NPrims 1 NPointGroups 0 NPrimGroups 0 NPointAttrib 0 NVertexAttrib 0 NPrimAttrib 0 NAttrib 0 0 0 0 1 Volume 0 1 0 0 0 1 0 0 0 1 -2 2 2 2 constant 0 0 smoke 0 1 0 1 0 1 0 1 0 1 beginExtra ← End / extras endExtra

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Let’s Play with Real Data: Hands-on Demo

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Ways to Get Your Data in Houdini A) Custom C++ Plugins B) Scripting C) Ytini

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+ ( )

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Ytini.com

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Rendering in Houdini

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Demo: Camera, Lighting, and Render Setup