[contour-3d] 3D Contour Plot

[MarkusNeusinger]

3D contour plot visualization. Displays contour lines or filled contours on a 3D surface, showing isolines of a function of two variables in three-dimensional space.

[claude]

✅ Spec ID: contour-3d

Rationale: This visualizes contour lines on a 3D surface (unlike contour-basic which is 2D). Distinct from surface-basic which shows a solid surface without isolines.

Add label approved to begin generation.

[github-actions]

✅ Specification Ready: contour-3d

PR: #3234

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specification.md

contour-3d: 3D Contour Plot

Description

A 3D contour plot displays contour lines or filled contour bands on a three-dimensional surface, showing isolines of a function of two variables in 3D space. Unlike 2D contour plots that flatten the visualization, 3D contour plots preserve the surface geometry while highlighting level curves, making it easier to understand both the overall shape and specific value regions simultaneously. This visualization combines the spatial intuition of 3D surfaces with the precision of contour-based value identification.

Applications

• Visualizing mathematical functions where both the surface shape and specific level curves matter, such as optimization landscapes with critical points
• Analyzing terrain elevation data with highlighted altitude bands for topographic analysis and route planning
• Displaying electromagnetic field distributions with equipotential surfaces in physics and engineering
• Examining response surfaces in experimental design where understanding both trends and thresholds is important

Data

• x (numeric array) - X-axis grid values, typically uniformly spaced
• y (numeric array) - Y-axis grid values, typically uniformly spaced
• z (2D numeric array) - Height values at each (x, y) point representing the surface
• Size: 30x30 to 50x50 grid points for clear visualization with visible contour detail

Notes

• Use a sequential or diverging colormap to distinguish contour levels clearly
• Include contour lines at regular intervals to show level curves on the surface
• Consider projecting contours onto the base plane as well as the surface for reference
• Enable rotation for interactive libraries to explore the 3D structure
• Include a colorbar to indicate the value scale of contour levels

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Next: Add approved label to merge this specification to main.

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🤖 spec-create workflow

[github-actions]

🚀 Specification Merged!

Specification: contour-3d
PR: #3234 (merged)

The specification is now in main and synced to PostgreSQL.

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Next: Add generate:{library} labels to start generating implementations.

Available libraries: matplotlib, seaborn, plotly, bokeh, altair, plotnine, pygal, highcharts, letsplot

Or use workflow dispatch for bulk operations.

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🤖 spec-create workflow