28 lines
1.0 KiB
Markdown
28 lines
1.0 KiB
Markdown
# Slope Distribution
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Compute the angular slope distribution of a DATA_FIELD surface. Equivalent to Gwyddion's slope_dist module (slope_dist.c).
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## Inputs
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| Name | Type | Required | Description |
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|------|------|----------|-------------|
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| field | DATA_FIELD | Yes | Input surface field |
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## Outputs
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| Name | Type | Description |
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|------|------|-------------|
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| distribution | LINE | Slope distribution histogram |
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## Controls
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| Name | Type | Default | Description |
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|------|------|---------|-------------|
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| distribution | dropdown | theta | Distribution type: theta (inclination angle, probability density in 1/deg), phi (azimuthal direction, weighted by slope², 0–360°), or gradient (slope magnitude, probability density in 1/(z/xy)) |
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| n_bins | INT | 90 | Number of histogram bins (10–1000) |
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## Limitations
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- The gradient magnitude distribution requires valid physical xy and z units for correct normalization.
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- phi distribution is weighted by slope squared; flat surfaces with near-zero slopes produce a noisy azimuthal distribution.
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