> ## Documentation Index
> Fetch the complete documentation index at: https://docs.datamarkin.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Crossings

> Draw multiple crossing lines with count annotations on an image.

## Overview

This convenience function iterates through all crossing lines managed by a Crossings object and draws each one with its individual styling and count information using the crossing() function.

## Function Signature

```python theme={null}
crossings(
    image: np.ndarray
) -> np.ndarray
```

## Parameters

<ParamField path="image" type="np.ndarray" required>
  Input BGR image to annotate. Must be a 3-channel NumPy array with shape (height, width, 3). crossings\_manager: Crossings manager object containing multiple crossing lines. Must have a 'crossings' attribute that is iterable, containing Crossing objects.
</ParamField>

## Returns

<ResponseField name="result" type="np.ndarray">
  The input image with all crossing lines and count annotations drawn. Same shape and dtype as input image. Image is modified in-place.
</ResponseField>

## Examples

<CodeGroup>
  ```python Example theme={null}
  import cv2
  import pixelflow as pf

  # Load image and create crossing manager
  image = cv2.imread("intersection.jpg")
  crossings_manager = pf.Crossings()

  # Add multiple crossing lines
  crossings_manager.add_crossing(
  ```

  ```python Example theme={null}
  crossings_manager.add_crossing(
  ```

  ```python Example theme={null}

  # Draw all crossings at once
  annotated = pf.annotate.crossings(image, crossings_manager)

  # Alternative workflow with tracking integration
  tracker = pf.tracker.ByteTracker()
  for frame in frames:
  ```
</CodeGroup>

## Error Handling

<Warning>
  This function may raise the following exceptions:

  * **AttributeError**: If crossings\_manager lacks 'crossings' attribute or if individual crossing objects lack required attributes.
  * **AssertionError**: If image is not a NumPy array (raised by underlying crossing() calls).
</Warning>

## Notes

<Note>
  * Each crossing line is drawn with its individual color, name, and styling
  * The function processes crossings in the order they appear in the manager
  * All crossing lines share the same adaptive sizing parameters based on image resolution
  * The input image is modified in-place for efficiency
  * This is equivalent to calling crossing() individually for each line
</Note>