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Canvas troubleshooting: Difference between revisions
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root.dumpSceneGraph('my-canvas-scenegraph.osg'); | root.dumpSceneGraph('my-canvas-scenegraph.osg'); | ||
</syntaxhighlight> | </syntaxhighlight> | ||
Now, let's consider another example - this time actually building a little scene graph hierarchy with multiple groups and nodes, using a for loop: | |||
<syntaxhighlight lang="nasal"> | |||
var window = canvas.Window.new([320,160],"dialog"); | |||
var myCanvas = window.createCanvas().set("background", canvas.style.getColor("bg_color")); | |||
var root = myCanvas.createGroup(); | |||
var group = root.createChild('group', 'level:0'); | |||
for (var i=0;i<=5;i+=1) { | |||
var textNode = group.createChild("text") | |||
.setText("text node in group #1"~i) | |||
.setTranslation(20, 200) | |||
.set("alignment", "left-center") | |||
.set("character-size", 15) | |||
.set("font", "LiberationFonts/LiberationSans-Bold.ttf") | |||
.set("fill", "#ff0000"); | |||
var myGroup = root.createChild('group', 'my group'); | |||
group = group.createChild('group', 'level:'~i); | |||
} | |||
</syntaxhighlight> | |||
This will create a new group for each text node, added to its parent group. | |||
Once we inspect the scene graph, we'll see that it contains quite a bit of redundant state. | |||
However, this is where osg::Optimizer can shine, by optimizing our scene graph to get rid of redundant state sets and flatten the scene graph. | |||
{{WIP}} | |||
Next, we're going to explore dumping complex scene graphs to disk, i.e. those created by Canvas MFDs like the [[NavDisplay]] - so that we can check what the scene graph looks like after optimizing/simplifying it using osg::Simplifier and osg::Optimizer respectively, while also investigating which additional OSG properties may be helpful to expose for the optimizer/simplifier to provide satisfying results. | Next, we're going to explore dumping complex scene graphs to disk, i.e. those created by Canvas MFDs like the [[NavDisplay]] - so that we can check what the scene graph looks like after optimizing/simplifying it using osg::Simplifier and osg::Optimizer respectively, while also investigating which additional OSG properties may be helpful to expose for the optimizer/simplifier to provide satisfying results. | ||