drawArrow draws arrow segments from the first point to
the second over an Image object. This operation is destructive:
it changes irreversibly the Image object and cannot be undone.
drawArrow(image, pt1_x, pt1_y, pt2_x, pt2_y, tip_length = 0.1,
color = "red", thickness = 1)| image | An |
|---|---|
| pt1_x | A numeric value or vector representing the x coordinates of the first end of each arrow. |
| pt1_y | A numeric value or vector representing the y coordinates of the first end of each arrow. |
| pt2_x | A numeric value or vector representing the x coordinates of the second end of each arrow. |
| pt2_y | A numeric value or vector representing the y coordinates of the second end of each arrow. |
| tip_length | A numeric value or vector representing the length of each arrow's tip as a fraction of each arrow's length (default: 0.1). |
| color | A value or vector of any kind of R color specification compatible
with |
| thickness | A numeric value or vector representing the thickness in pixels of each arrow (default: 1). |
This function does not return anything. It modifies image in
place.
Simon Garnier, garnier@njit.edu
# TODO