From b4d03c4d8f6d25faccad1e3e763deaa29d540be0 Mon Sep 17 00:00:00 2001
From: Marius Kintel <marius@kintel.net>
Date: Fri, 9 Jul 2010 00:49:10 +0200
Subject: doc


diff --git a/src/node.h b/src/node.h
index 083aa91..17ae72b 100644
--- a/src/node.h
+++ b/src/node.h
@@ -82,6 +82,9 @@ public:
 		RENDER_CGAL,
 		RENDER_OPENCSG
 	};
+  /*! Should return a PolySet of the given geometry. It's normal to return an
+		  empty PolySet if smth. is wrong, but don't return NULL unless we change the calling
+			strategy for this method. */
 	virtual class PolySet *render_polyset(render_mode_e mode) const = 0;
 	virtual CSGTerm *render_csg_term(double m[20], QVector<CSGTerm*> *highlights, QVector<CSGTerm*> *background) const;
 	static CSGTerm *render_csg_term_from_ps(double m[20], QVector<CSGTerm*> *highlights, QVector<CSGTerm*> *background, PolySet *ps, const ModuleInstantiation *modinst, int idx);
-- 
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