Changeset 7391 for trunk/Ohana/src/opihi/cmd.astro/cplot.c

Timestamp:

Jun 7, 2006, 7:15:49 AM (20 years ago)

Author:

eugene

Message:

more efficient plotting

File:

• trunk/Ohana/src/opihi/cmd.astro/cplot.c (modified) (2 diffs)

trunk/Ohana/src/opihi/cmd.astro/cplot.c

@@ -3 +3 @@
 int cplot (int argc, char **argv) {
   
-  int i, Npts;
+  int i, Npts, status;
   float *x, *y, *r, *d, Rmin, Rmax;
   Vector Xvec, Yvec, *xvec, *yvec;
@@ -39 +39 @@
   y = Yvec.elements;
   
-  for (i = 0; i < Xvec.Nelements; i++, r++, d++, x++, y++) {
+  Npts = 0;
+  for (i = 0; i < Xvec.Nelements; i++, r++, d++) {
     while (*r < Rmin) *r += 360.0;
     while (*r > Rmax) *r -= 360.0;
-    fRD_to_XY (x, y, *r, *d, &graphmode.coords);
+    status = fRD_to_XY (x, y, *r, *d, &graphmode.coords);
+    if (!status) {
+      if (graphmode.ptype == 100) {
+        if (i % 2) {
+          // for odd points, skip previous also
+          x--;
+          y--;
+          Npts--;
+        } else {
+          // for even points, skip previous also
+          i++;
+          r++;
+          d++;
+        }
+      }
+      continue;
+    }
+    x++;
+    y++;
+    Npts++;
   }
-  
-  Npts = Xvec.Nelements;
+  Xvec.Nelements = Npts;
+
   graphmode.etype = 0;
   PrepPlotting (Npts, &graphmode);