import numpy as np
import matplotlib.pyplot as plt

corners = [(0,3), (1,5), (3,3), (2,1)]

my_ranges = 10
my_rows = 30

ulx, uly = corners[0]
urx, ury = corners[1]
lrx, lry = corners[2]
llx, lly = corners[3]

rax, ray = ulx, uly
rbx, rby = urx, ury
wax, way = ulx, uly
wbx, wby = llx, lly

rdirection = -1 if rax > rbx else 1
wdirection = -1 if way > wby else 1

rxdist = abs(rax-rbx)
rydist = abs(ray-rby)
wxdist = abs(wax-wbx)
wydist = abs(way-wby)

rxstep = rxdist/my_ranges
rystep = rydist/my_ranges
wxstep = wxdist/my_rows
wystep = wydist/my_rows

range_points = []
for i in range(my_ranges):
    x = rax + i*rxstep * rdirection
    y = ray + i*rystep
    range_points.append((x,y))

row_points = []
for i in range(my_rows):
    x = wax + i*wystep
    y = way + i*wystep * wdirection
    row_points.append((x,y))

fig, axs = plt.subplots(1,1, figsize=(10,10))
axs.plot([i[0] for i in corners], [i[1] for i in corners], 'o')
axs.plot([i[0] for i in range_points], [i[1] for i in range_points], 'o')
axs.plot([i[0] for i in row_points], [i[1] for i in row_points], 'o')
plt.show()