Canvas troubleshooting: Difference between revisions

Canvas troubleshooting (view source)

Revision as of 20:56, 16 February 2015

2,106 bytes added , 16 February 2015

m

→‎Dumping Canvas scene graphs to disk: adding patches from topic branch

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@@ Line 270: / Line 270: @@
 === Dumping Canvas scene graphs to disk ===
-Here's the required SimGear changes to add a new method for dumping the scene graph for each Canvas to a file:
+Here's the required SimGear changes to add a new method for dumping the scene graph for each Canvas element to a file (simply invoke the method on the top-level group to dump the whole canvas):
-<syntaxhighlight lang="diff">
+<syntaxhighlight lang="diff">diff --git a/simgear/canvas/elements/CanvasElement.cxx b/simgear/canvas/elements/CanvasElement.cxx
+index 6d8c930..6e0dc9b 100644
+--- a/simgear/canvas/elements/CanvasElement.cxx
++++ b/simgear/canvas/elements/CanvasElement.cxx
+@@ -222,6 +222,14 @@ namespace canvas
+     }
+   }
++  void Element::dumpSceneGraph(const std::string&filename)
++{
++       osgDB::writeNodeFile(*_transform.get(), filename);
++       SG_LOG(SG_GENERAL, SG_ALERT, "dumping Canvas scene graph to file:"<<filename);
++
++}
++
++
+   //----------------------------------------------------------------------------
+   void Element::onDestroy()
+   {
+diff --git a/simgear/canvas/elements/CanvasElement.hxx b/simgear/canvas/elements/CanvasElement.hxx
+index 37e12de..5a2cec8 100644
+--- a/simgear/canvas/elements/CanvasElement.hxx
++++ b/simgear/canvas/elements/CanvasElement.hxx
+@@ -25,6 +25,8 @@
+ #include <simgear/props/PropertyBasedElement.hxx>
+ #include <simgear/misc/stdint.hxx> // for uint32_t
++#include <osgDB/WriteFile>
++
+ #include <osg/BoundingBox>
+ #include <osg/MatrixTransform>
+@@ -212,6 +214,8 @@ namespace canvas
+         return ElementPtr( new Derived(canvas, node, style, parent) );
+       }
++
++      void dumpSceneGraph(const std::string& filename);
+     protected:
+       enum Attributes
+@@ -276,6 +280,7 @@ namespace canvas
+         return false;
+       }
++
+       /**
+        * Register a function for setting a style specified by the given property
+        *
 </syntaxhighlight>
@@ Line 277: / Line 326: @@
 <syntaxhighlight lang="diff">
 diff --git a/src/Scripting/NasalCanvas.cxx b/src/Scripting/NasalCanvas.cxx
-index 4fa7652..2b63f02 100644
+index 4fa7652..ffa8211 100644
 --- a/src/Scripting/NasalCanvas.cxx
 +++ b/src/Scripting/NasalCanvas.cxx
-@@ -478,7 +478,8 @@ naRef initNasalCanvas(naRef globals, naContext c)
+@@ -492,7 +492,8 @@ naRef initNasalCanvas(naRef globals, naContext c)
-      .method("dispatchEvent", &sc::Canvas::dispatchEvent)
+      .method("setFocus", &sc::Element::setFocus)
-      .method("setLayout", &sc::Canvas::setLayout)
+      .method("dispatchEvent", &sc::Element::dispatchEvent)
-      .method("setFocusElement", &sc::Canvas::setFocusElement)
+      .method("getBoundingBox", &sc::Element::getBoundingBox)
--    .method("clearFocusElement", &sc::Canvas::clearFocusElement);
+-    .method("getTightBoundingBox", &sc::Element::getTightBoundingBox);
-+    .method("clearFocusElement", &sc::Canvas::clearFocusElement)
++    .method("getTightBoundingBox", &sc::Element::getTightBoundingBox)
-+    .method("dumpSceneGraph", &sc::Canvas::dumpSceneGraph);
++    .method("dumpSceneGraph", &sc::Element::dumpSceneGraph);
+</syntaxhighlight>
-   canvas_module.set("_newCanvasGhost", f_createCanvas);
-   canvas_module.set("_getCanvasGhost", f_getCanvas);
+And here's the Nasal code to test the new API via the [[Nasal Console]]:
+<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 myGroup = root.createChild('group', 'my group');
+var textNode = myGroup.createChild("text")
+        .setText("Some text")
+        .setTranslation(20, 200)
+        .set("alignment", "left-center")
+        .set("character-size", 15)
+        .set("font", "LiberationFonts/LiberationSans-Bold.ttf")
+        .set("fill", "#ff0000");
+textNode.dumpSceneGraph('textnode.osg');
 </syntaxhighlight>
 This is what a simple Canvas scene graph may look like:

Canvas troubleshooting: Difference between revisions

Canvas troubleshooting (view source)

Revision as of 20:56, 16 February 2015

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