Uys of Spades - 6 months ago 184
Python Question

# Finding coordinate points of intersection with two numpy arrays

This sort of question is a tad bit different the normal 'how to find the intersection of two lines' via numpy. Here is the situation, I am creating a program that looks at slope stability and I need to find where a circle intersects a line.

I have two numpy arrays:

One array gives me a normal (x, y) values of an elevation profile in 2D

The other array is calculated values of coordinates (x, y) that spans the circumference of a circle from a defined centre.

I need to somehow compare the two at what approximate point does the coordinates of the circle intersect the profile line?

Here some data to work with:

circ_coords = np.array([
[.71,.71],
[0.,1.]
])

linear_profile = np.array([
[0.,0.],
[1.,1.]
])

I need a function that would spit out say a single or multiple coordinate values saying that based on these circular coordinates and your linear profile.. the two would intersect here.

def intersect(array1, array2):
# stuff
return computed_array

Shapely has some cool functions. According to this post, this code should work:

from shapely.geometry import LineString
from shapely.geometry import Point

p = Point(0,0)//center