Modified Files:

Makefile.am SGNodeMasks.hxx
Added Files:
	SGPickCallback.hxx SGSceneUserData.hxx: Preparations for generic
	scenery picking.

simgear/scene/util/Makefile.am

@@ -8,6 +8,8 @@ include_HEADERS = \
 	SGNodeMasks.hxx \
 	SGUpdateVisitor.hxx \
 	SGDebugDrawCallback.hxx \
+	SGPickCallback.hxx \
+	SGSceneUserData.hxx \
 	SGStateAttributeVisitor.hxx \
 	SGTextureStateAttributeVisitor.hxx
 

simgear/scene/util/SGNodeMasks.hxx

@@ -1,6 +1,6 @@
 /* -*-c++-*-
  *
- * Copyright (C) 2006 Mathias Froehlich 
+ * Copyright (C) 2006-2007 Mathias Froehlich 
  *
  * This program is free software; you can redistribute it and/or
  * modify it under the terms of the GNU General Public License as
@@ -23,10 +23,10 @@
 #define SG_SCENE_NODEMASKS_HXX
 
 /// If set, do terrain elevation computations with that nodes
-#define SG_NODEMASK_TERRAIN_BIT (1<<0)
+#define SG_NODEMASK_TERRAIN_BIT        (1<<0)
 /// If set, cast shadows
-#define SG_NODEMASK_SHADOW_BIT  (1<<1)
+#define SG_NODEMASK_SHADOW_BIT         (1<<1)
 /// If set, the node is pickable
-#define SG_NODEMASK_PICK_BIT    (1<<2)
+#define SG_NODEMASK_PICK_BIT           (1<<2)
 
 #endif

simgear/scene/util/SGPickCallback.hxx

@@ -0,0 +1,51 @@
+/* -*-c++-*-
+ *
+ * Copyright (C) 2006-2007 Mathias Froehlich 
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
+ * MA 02110-1301, USA.
+ *
+ */
+
+#ifndef SG_SCENE_PICKCALLBACK_HXX
+#define SG_SCENE_PICKCALLBACK_HXX
+
+#include <simgear/structure/SGReferenced.hxx>
+#include <simgear/math/SGMath.hxx>
+
+// Used to implement scenery interaction.
+// The interface is still under development
+class SGPickCallback : public SGReferenced {
+public:
+  struct Info {
+    SGVec3d wgs84;
+    SGVec3d local;
+  };
+
+  virtual ~SGPickCallback() {}
+  virtual bool buttonPressed(int button, const Info& info)
+  { return false; }
+  virtual void update(double dt)
+  { }
+  virtual void buttonReleased(void)
+  { }
+};
+
+struct SGSceneryPick {
+  SGPickCallback::Info info;
+  SGSharedPtr<SGPickCallback> callback;
+};
+
+#endif

simgear/scene/util/SGSceneUserData.hxx

@@ -0,0 +1,59 @@
+/* -*-c++-*-
+ *
+ * Copyright (C) 2006-2007 Mathias Froehlich 
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
+ * MA 02110-1301, USA.
+ *
+ */
+
+#ifndef SG_SCENE_USERDATA_HXX
+#define SG_SCENE_USERDATA_HXX
+
+#include <osg/Referenced>
+#include <osg/Node>
+#include "SGPickCallback.hxx"
+
+class SGSceneUserData : public osg::Referenced {
+public:
+  static SGSceneUserData* getSceneUserData(osg::Node* node)
+  {
+    if (!node)
+      return 0;
+    osg::Referenced* referenced = node->getUserData();
+    if (!referenced)
+      return 0;
+    return dynamic_cast<SGSceneUserData*>(referenced);
+  }
+  static SGSceneUserData* getOrCreateSceneUserData(osg::Node* node)
+  {
+    SGSceneUserData* userData = getSceneUserData(node);
+    if (userData)
+      return userData;
+    userData = new SGSceneUserData;
+    node->setUserData(userData);
+    return userData;
+  }
+
+  SGPickCallback* getPickCallback() const
+  { return _pickCallback; }
+  void setPickCallback(SGPickCallback* pickCallback)
+  { _pickCallback = pickCallback; }
+  
+private:
+  SGSharedPtr<SGPickCallback> _pickCallback;
+};
+
+#endif