Animating Treemaps

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Animating Treemaps

• M. Ghoniem J-D Fekete
• Ecole des Mines de Nantes

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Why animate treemaps ?

• When
• changing the weight attribute
• e.g. from of children to size of children
• zooming in and out
• the tree is changing dynamically
• The geometry may change a lot
• Animation makes it possible to follow the
  transition from one view to the other

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Example
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Main concerns

• Visible continuity during the animation
• simple linear interpolation of the geometry does
  not work!
• easy with slice and dice treemaps
• Linear interpolation of the node weights
• problematic with squarified treemaps
• Order is not maintained among siblings
• Chaotic jumps occur during the animation

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Animation
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Improving Continuity with Squarified Treemaps

• Layout in Spiral order
• siblings turn instead of jumping
• Problems
• taken individually, each level is easy to follow
• as a whole, the animation is very chaotic

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Animating Squarified Treemaps (2)
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Animating Squarified Treemaps
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Work in progress

• Improve continuity in animation
• level by level animation?
• Experiment with other tree layout visualizations
• Sunburst
• Node Link Diagrams