--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/example/cube/RenderingEngine.cpp	Sat Feb 02 19:15:39 2008 +0900
@@ -0,0 +1,101 @@
+void
+RenderingEngine::init(int width, int height, int bpp)
+{
+}
+
+TaskDepend
+RenderingEngine::update_all(SceneGraph* next, SceneGraph* now, TaskDepend wait)
+{
+    SceneGraph *t, *nt;
+    t = now;
+    nt = next;
+
+    //glPushMatrix();
+    int s=0;
+    while(t)
+    {
+	//t->draw(stack);
+	t->update(t->data_pack, nt->data_pack);
+	if(t->child != NULL)
+	{
+	    stack[s++] = t->matrix; //push
+	    t = t->child;
+	}
+	else if(t->brother != NULL)
+	{
+	    stack[--s] = NULL; //pop
+	    stack[s++] = t->matrix; //push
+	    t = t->brother;
+	}
+	else
+	{
+	    while(t)
+	    {
+		if(t->brother != NULL)
+		{
+		    stack[--s] = NULL; //pop
+		    stack[s++] = t->matrix; //push
+		    t = t->brother;
+		    break;
+		}
+		else
+		{
+		    t = t->parent;
+		    if(t)
+		    {
+			stack[--s] = NULL; //pop
+		    }
+		}
+	    }
+	}
+    }
+    //glPopMatrix();
+}
+
+TaskDepend
+RenderingEngin::draw_all(SceneGraph* now, TaskDepend wait)
+{
+    Polygon *t;
+
+    t = this;
+
+    //glPushMatrix();
+    int s=0;
+    while(t)
+    {
+	t->draw(stack);
+	if(t->child != NULL)
+	{
+	    stack[s++] = t->matrix; //push
+	    t = t->child;
+	}
+	else if(t->brother != NULL)
+	{
+	    stack[--s] = NULL; //pop
+	    stack[s++] = t->matrix; //push
+	    t = t->brother;
+	}
+	else
+	{
+	    while(t)
+	    {
+		if(t->brother != NULL)
+		{
+		    stack[--s] = NULL; //pop
+		    stack[s++] = t->matrix; //push
+		    t = t->brother;
+		    break;
+		}
+		else
+		{
+		    t = t->parent;
+		    if(t)
+		    {
+			stack[--s] = NULL; //pop
+		    }
+		}
+	    }
+	}
+    }
+    //glPopMatrix();
+}