[GRASS-SVN] r69668 - grass/trunk/display/d.linegraph

[svn_grass at osgeo.org]

Author: wenzeslaus
Date: 2016-10-03 16:39:22 -0700 (Mon, 03 Oct 2016)
New Revision: 69668

Modified:
   grass/trunk/display/d.linegraph/main.c
Log:
d.linegraph: do not draw from 0,0

There is no data at 0,0 (xoffset,yoffset), so there
is no reason to draw the a from there.
We start with the first actual data point.


Modified: grass/trunk/display/d.linegraph/main.c
===================================================================
--- grass/trunk/display/d.linegraph/main.c	2016-10-03 23:28:48 UTC (rev 69667)
+++ grass/trunk/display/d.linegraph/main.c	2016-10-03 23:39:22 UTC (rev 69668)
@@ -516,11 +516,9 @@
 		}
 
 		new_x = xoffset + (line * xscale);
-		if (line == 0) {
-		    prev_x = xoffset;
-		    prev_y[i] = yoffset;
-		}
-		D_line_abs(prev_x, prev_y[i], new_x, new_y[i]);
+                /* draw only when we the previous point to start from */
+                if (line > 0)
+                    D_line_abs(prev_x, prev_y[i], new_x, new_y[i]);
 		prev_y[i] = new_y[i];
 	    }
 	}