Introduced SwitchLayer which will form the basis of provided support for varients

2008-08-27 10:13:30 +00:00
parent 9499cfa420
commit 95a359bdab
11 changed files with 372 additions and 2 deletions
--- a/src/osgPlugins/ive/SwitchLayer.cpp
+++ b/src/osgPlugins/ive/SwitchLayer.cpp
@@ -0,0 +1,88 @@
+/* -*-c++-*- OpenSceneGraph - Copyright (C) 1998-2008 Robert Osfield 
+ *
+ * This library is open source and may be redistributed and/or modified under  
+ * the terms of the OpenSceneGraph Public License (OSGPL) version 0.0 or 
+ * (at your option) any later version.  The full license is in LICENSE file
+ * included with this distribution, and on the openscenegraph.org website.
+ * 
+ * This library 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 
+ * OpenSceneGraph Public License for more details.
+*/
+
+#include "Exception.h"
+#include "SwitchLayer.h"
+#include "Layer.h"
+
+using namespace ive;
+
+void SwitchLayer::write(DataOutputStream* out)
+{
+    // Write Layer's identification.
+    out->writeInt(IVESWITCHLAYER);
+
+    // If the osg class is inherited by any other class we should also write this to file.
+    osgTerrain::Layer*  layer = dynamic_cast<osgTerrain::Layer*>(this);
+    if  (layer)
+        ((ive::Layer*)(layer))->write(out);
+    else
+        throw Exception("SwitchLayer::write(): Could not cast this osgLayer::SwitchLayer to an osgTerrain::Layer.");
+
+
+    out->writeUInt(getActiveLayer());
+
+    LayerHelper helper;
+
+    out->writeUInt(getNumLayers());
+    for(unsigned int i=0; i<getNumLayers(); ++i)
+    {
+        if(getLayer(i))
+        {
+            out->writeBool(true);
+            helper.writeLayer(out, getLayer(i));
+        }
+        else
+        {
+            out->writeBool(false);
+            out->writeString(getFileName(i));
+        }
+    }
+}
+
+void SwitchLayer::read(DataInputStream* in)
+{
+    // Peek on Layer's identification.
+    int id = in->peekInt();
+    if (id != IVESWITCHLAYER)
+        throw Exception("SwitchLayer::read(): Expected SwitchLayer identification.");
+    
+    // Read Layer's identification.
+    id = in->readInt();
+
+    // If the osg class is inherited by any other class we should also read this from file.
+    osgTerrain::Layer*  layer = dynamic_cast<osgTerrain::Layer*>(this);
+    if (layer)
+        ((ive::Layer*)(layer))->read(in);
+    else
+        throw Exception("SwitchLayer::read(): Could not cast this osgLayer::Layer to an osg::Group.");
+
+
+    setActiveLayer(in->readUInt());
+
+    LayerHelper helper;
+
+    unsigned int numLayers = in->readUInt();
+    for(unsigned int i=0; i<numLayers; ++i)
+    {
+        bool readInlineLayer = in->readBool();
+        if (readInlineLayer)
+        {
+            addLayer(helper.readLayer(in));
+        }
+        else
+        {
+            addLayer(in->readString());
+        }
+    }
+}