From c6ed57637ccbd4c80e181b081cc605013cc9a6dd Mon Sep 17 00:00:00 2001
From: Paul Garlick <pgarlick@tourbillion-technology.com>
Date: Wed, 9 Oct 2019 00:30:31 +0100
Subject: derive number of columns and rows of height data.

---
 makeBoundary.py | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/makeBoundary.py b/makeBoundary.py
index 9b9e5e2..f71ef8c 100755
--- a/makeBoundary.py
+++ b/makeBoundary.py
@@ -4,6 +4,7 @@ import matplotlib.pyplot as plt
 import numpy as np
 import bisect
 import ast
+import math
 
 #TODO: use YAML/ruamel.yaml for configuration file.
 def read_definition(filename):
@@ -37,7 +38,14 @@ height_data = definition_dict["height_data"] # topography
 # print('gradient =', m, 'intercept =', c)
 
 with open(height_data, "r") as topo:
-    xin, yin, zin = np.loadtxt(topo, delimiter=' ', unpack=True)
+    xtp, ytp, ztp = np.loadtxt(topo, delimiter=' ', unpack=True)
+
+# number of cells in x direction
+ncols = int(math.sqrt(len(xtp)*(xtp[0]+xtp[-1])/(ytp[0]+ytp[-1])))
+# number of cells in y direction
+nrows = int(len(xtp)/ncols)
+
+print(ncols, nrows)
 
 # array index and co-ordinates are related by:
 #            index = (co-ord - 0.25)*2
-- 
cgit