added maximum depth command-line argument (-d) and scene option (max_depth); prettified elapsed time output when greater than 60 seconds

git-svn-id: svn://anubis/fart/trunk@203 7f9b0f55-74a9-4bce-be96-3c2cd072584d

parser/nodes.h

@@ -153,6 +153,12 @@ class MaterialRefNode : public IdentifierNode
         bool isMaterial() { return true; }
 };
 
+class MaxDepthNode : public IntegerNode
+{
+    public:
+        MaxDepthNode(int i) : IntegerNode(i) {}
+};
+
 class MultisampleNode : public IntegerNode
 {
     public:

parser/parser.lex

@@ -51,6 +51,7 @@ intersect           return INTERSECT;
 light               return LIGHT;
 look_at             return LOOKAT;
 material            return MATERIAL;
+max_depth           return MAXDEPTH;
 multisample         return MULTISAMPLE;
 options             return OPTIONS;
 plane               return PLANE;

parser/parser.yy

@@ -70,6 +70,7 @@ static refptr<Node> parsed_scene_node;
 %token LIGHT;
 %token LOOKAT;
 %token MATERIAL;
+%token MAXDEPTH;
 %token MULTISAMPLE;
 %token OPTIONS;
 %token PLANE;
@@ -281,6 +282,9 @@ options_item: WIDTH DEC_NUMBER {
             | MULTISAMPLE DEC_NUMBER {
                     $$ = new MultisampleNode($2->getInteger());
                 }
+            | MAXDEPTH DEC_NUMBER {
+                    $$ = new MaxDepthNode($2->getInteger());
+                }
             ;
 
 plane: PLANE LCURLY plane_items RCURLY {