1 files changed, 47 insertions, 0 deletions

diff --git a/src/Panorama.cxx b/src/Panorama.cxx
index 61ba781..6c0b6ba 100644
--- a/src/Panorama.cxx
+++ b/src/Panorama.cxx
@@ -37,6 +37,7 @@ Panorama::Panorama() {
   close_mountains = new Hills();
   visible_mountains = new Hills();
   height_dist_ratio = 0.07;
+  hide_value = 1.0;
   pi_d = asin(1.0) * 2.0;
   deg2rad = pi_d / 180.0;
   parms.a_center = 0.0;
@@ -398,11 +399,56 @@ Panorama::update_angles() {
     }
   }
 
+
   mountains->sort();
 
   update_close_mountains();
 }
 
+void
+Panorama::set_hide_value(double h) {
+  hide_value = h;
+  update_visible_mountains();
+}
+
+void
+Panorama::mark_hidden() {
+  int i, j;
+  Hill *m, *n;
+  double h;
+   
+  for (i=0; i<visible_mountains->get_num(); i++) {
+    m = visible_mountains->get(i);
+
+    m->flags &= ~Hill::HIDDEN;
+
+    if (m->flags & Hill::DUPLICATE) {
+      continue;
+    }
+
+    for (j=0; j<visible_mountains->get_num(); j++) {
+      n = visible_mountains->get(j);
+      
+      if (n->flags & Hill::DUPLICATE || n->flags & Hill::TRACK_POINT) {
+        continue;
+      }
+      if (m == n || fabs(m->a_view - n->a_view > pi_d / 2.0)) {
+        continue;
+      }
+      if (m->dist < n->dist || m->a_nick > n->a_nick) {
+        continue;
+      }
+
+      h = (n->a_nick - m->a_nick) / fabs(m->a_view - n->a_view);
+      if (isinf(h) || h > hide_value) {
+        m->flags |= Hill::HIDDEN;
+      }
+    }
+
+  }
+
+}
+
 void 
 Panorama::update_close_mountains() {
   int i;
@@ -451,6 +497,7 @@ Panorama::update_visible_mountains() {
     }
   }
 
+  mark_hidden();
   update_coordinates();
 }