Canvas MapStructure: Difference between revisions

Canvas MapStructure (view source)

1,022 bytes added , 4 October 2015

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20,741

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@@ Line 1,085: / Line 1,085: @@
          last_step_time = time;
 }
+</syntaxhighlight>
+The most relevant/interesting part being the foreach loop where all targets are processed:
+<syntaxhighlight lang="nasal">
+foreach (var t; node.getChildren()) {
+                var lon = t.getNode("longitude-deg");
+                var lat = t.getNode("latitude-deg");
+                if (lon == nil or lat == nil)
+                        die("target coords undefined");
+                var target = geo.Coord.new().set_latlon(lat.getValue(), lon.getValue());
+# ...
+}
+</syntaxhighlight>
+We can easily turn this into a new helper function:
+<syntaxhighlight lang="nasal">
+var getTargets = func(node) {
+var results = [];
+foreach (var t; node.getChildren()) {
+                var lon = t.getNode("longitude-deg");
+                var lat = t.getNode("latitude-deg");
+                if (lon == nil or lat == nil)
+                        die("target coords undefined");
+                var target = geo.Coord.new().set_latlon(lat.getValue(), lon.getValue());
+append(results,target);
+}
+return results;
+}
 </syntaxhighlight>