Use of copy-constructors

[simgear.git] / simgear / scene / material / EffectGeode.cxx

diff --git a/simgear/scene/material/EffectGeode.cxx b/simgear/scene/material/EffectGeode.cxx
index aff9aebc4469c077f69952db4010199d68a49380..26eab3852fdf6715864c23581c5a3af359dcee9a 100644 (file)
--- a/simgear/scene/material/EffectGeode.cxx
+++ b/simgear/scene/material/EffectGeode.cxx
@@ -23,6 +23,7 @@
 #include "Technique.hxx"
 
 #include <osgUtil/CullVisitor>
+#include <osgUtil/TangentSpaceGenerator>
 
 #include <osgDB/Registry>
 #include <osgDB/Input>
@@ -66,12 +67,40 @@ void EffectGeode::releaseGLObjects(osg::State* state) const
     Geode::releaseGLObjects(state);
 }
 
+// Generates tangent space vectors or other data from geom, as defined by effect
+void EffectGeode::runGenerators(osg::Geometry *geometry)
+{
+      if(geometry && _effect.valid()) {
+        // Generate tangent vectors for the geometry
+        osg::ref_ptr<osgUtil::TangentSpaceGenerator> tsg = new osgUtil::TangentSpaceGenerator;
+
+        // Generating only tangent vector should be enough
+        // since the binormal is a cross product of normal and tangent
+        // This saves a bit of memory & memory bandwidth!
+        int n = _effect->getGenerator(Effect::TANGENT);
+        tsg->generate(geometry, 0);  // 0 is normal_unit, but I have no idea what that is!
+        if (n != -1 && !geometry->getVertexAttribArray(n))
+            geometry->setVertexAttribData(n, osg::Geometry::ArrayData(tsg->getTangentArray(), osg::Geometry::BIND_PER_VERTEX,GL_FALSE));
+
+        n = _effect->getGenerator(Effect::BINORMAL);
+        if (n != -1 && !geometry->getVertexAttribArray(n))
+            geometry->setVertexAttribData(n, osg::Geometry::ArrayData(tsg->getBinormalArray(), osg::Geometry::BIND_PER_VERTEX,GL_FALSE));
+
+        n = _effect->getGenerator(Effect::NORMAL);
+        if (n != -1 && !geometry->getVertexAttribArray(n))
+            geometry->setVertexAttribData(n, osg::Geometry::ArrayData(tsg->getNormalArray(), osg::Geometry::BIND_PER_VERTEX,GL_FALSE));
+    }
+}
+
 bool EffectGeode_writeLocalData(const Object& obj, osgDB::Output& fw)
 {
     const EffectGeode& eg = static_cast<const EffectGeode&>(obj);
 
-    fw.indent() << "effect\n";
-    fw.writeObject(*eg.getEffect());
+    if (eg.getEffect()) {
+        fw.indent() << "effect\n";
+        fw.writeObject(*eg.getEffect());
+    }
+
     return true;
 }