delaunay linear_interpolate_grid: enable grid of height/width 1

fixes #997
matplotlib · Nov 2, 2012 · 6065697 · 6065697
1 parent 5b90a27
commit 6065697
Showing 1 changed file with 2 additions and 2 deletions.
diff --git a/lib/matplotlib/delaunay/_delaunay.cpp b/lib/matplotlib/delaunay/_delaunay.cpp
@@ -289,8 +289,8 @@ static PyObject *linear_interpolate_grid(double x0, double x1, int xsteps,
     if (!z) return NULL;
     z_ptr = (double*)PyArray_DATA(z);
 
-    dx = (x1 - x0) / (xsteps-1);
-    dy = (y1 - y0) / (ysteps-1);
+    dx = ( x1==x0 ? 0 : (x1 - x0) / (xsteps-1) );
+    dy = ( y1==y0 ? 0 : (y1 - y0) / (ysteps-1) );
 
     rowtri = 0;
     for (iy=0; iy<ysteps; iy++) {