Howto:Dynamic Liveries via Canvas: Difference between revisions

Howto:Dynamic Liveries via Canvas (view source)

1,232 bytes added , 15 September 2014

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+[[File:Canvas-livery-demo-using-ogle.png|thumb|A screen shot showing the ogel aircraft whose livery is dynamically changed using the [[Canvas]] system - in this case, we're simply rendering a [[MapStructure]] map onto the face of the pilot using ~10 lines of Nasal/Canvas code.]]
+== Example ==
+<syntaxhighlight lang="nasal">
+# create a new window, dimensions are 320 x 160, using the dialog decoration (i.e. titlebar)
+var window = canvas.Window.new([320,160],"dialog");
+# adding a canvas to the new window and setting up background colors/transparency
+var myCanvas = window.createCanvas();
+# creating the top-level/root group which will contain all other elements/group
+var root = myCanvas.createGroup();
+# ogel
+myCanvas.addPlacement({"node": "Head"});
+var TestMap = root.createChild("map");
+TestMap.setController("Aircraft position");
+TestMap.setRange(25);
+TestMap.setTranslation(    myCanvas.get("view[0]")/2,
+                           myCanvas.get("view[1]")/2
+                        );
+var r = func(name,vis=1,zindex=nil) return caller(0)[0];
+foreach(var type; [r('APT'), r('VOR') ] )
+ TestMap.addLayer(factory: canvas.SymbolLayer, type_arg: type.name, visible: type.vis, priority: type.zindex,);
+</syntaxhighlight>
 == Objective ==