30 lines
1.1 KiB
Markdown
30 lines
1.1 KiB
Markdown
# Cross Section
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Extract a cross-section height profile along a line between two draggable points on a DATA_FIELD. Equivalent to gwy_data_field_get_profile.
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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 height field |
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| marker_pair | COORDPAIR | No | Locks both line endpoints from an external coordinate pair |
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## Outputs
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| Name | Type | Description |
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|------|------|-------------|
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| profile | LINE | Height profile along the cross-section line |
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| marker_pair | COORDPAIR | Current endpoint coordinates (passthrough for chaining) |
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## Controls
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| Name | Type | Default | Description |
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|------|------|---------|-------------|
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| extend | dropdown | none | none: profile between the two markers; to_edges: extend line to image borders |
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| n_samples | INT | 0 | Number of sample points along the profile (0 = auto, one per pixel diagonal) |
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## Notes
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- Profile is sampled using cubic spline interpolation (order 3); sharp step edges may show ringing.
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- Physical x-axis of the output profile is the Euclidean distance in field xy units.
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