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Canvas troubleshooting: Difference between revisions
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→Dumping Canvas scene graphs to disk
| Line 438: | Line 438: | ||
var myCanvas = window.createCanvas().set("background", canvas.style.getColor("bg_color")); | var myCanvas = window.createCanvas().set("background", canvas.style.getColor("bg_color")); | ||
var root = myCanvas.createGroup(); | var root = myCanvas.createGroup(); | ||
var group = root.createChild('group | var group = root.createChild('group'); | ||
for (var i=0;i<=5;i+=1) { | for (var i=0;i<=5;i+=1) { | ||
var textNode = group.createChild("text") | var textNode = group.createChild("text") | ||
.setText("text node in group # | .setText("=>text node in group # "~i) | ||
.setTranslation(20, | .setTranslation(20+i*5, 60+i*15) | ||
.set("alignment", "left-center") | .set("alignment", "left-center") | ||
.set("character-size", | .set("character-size", 12) | ||
.set("font", "LiberationFonts/LiberationSans-Bold.ttf") | .set("font", "LiberationFonts/LiberationSans-Bold.ttf") | ||
.set("fill", "#ff0000"); | .set("fill", "#ff0000"); | ||
group = group.createChild('group' | group = group.createChild('group'); | ||
} | } | ||
root.dumpSceneGraph('my-little-sg.osg'); | |||
</syntaxhighlight> | </syntaxhighlight> | ||
This will create a new group for each text node, added to its parent group. | 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. | Once we inspect the scene graph, we'll see that it contains quite a bit of redundant state. | ||
However, this is where osg::Optimizer[http://trac.openscenegraph.org/projects/osg//wiki/Support/UserGuides/OptimizerOptions] can shine, by optimizing our scene graph to get rid of redundant state sets and flatten the scene graph. | However, this is where osg::Optimizer[http://trac.openscenegraph.org/projects/osg//wiki/Support/UserGuides/OptimizerOptions] can shine, by optimizing our scene graph to get rid of redundant state sets and flatten the scene graph. | ||