1 files changed, 7 insertions, 21 deletions

diff --git a/src/mainwin.cc b/src/mainwin.cc
index 3243847..1b90b60 100644
--- a/src/mainwin.cc
+++ b/src/mainwin.cc
@@ -45,6 +45,7 @@
 #include "ProgressWidget.h"
 #endif
 #include "ThrownTogetherRenderer.h"
+#include "csgtermnormalizer.h"
 
 #include <QMenu>
 #include <QTime>
@@ -582,7 +583,7 @@ void MainWindow::load()
 AbstractNode *MainWindow::find_root_tag(AbstractNode *n)
 {
 	BOOST_FOREACH (AbstractNode *v, n->children) {
-		if (v->modinst->tag_root) return v;
+		if (v->modinst->isRoot()) return v;
 		if (AbstractNode *vroot = find_root_tag(v)) return vroot;
 	}
 	return NULL;
@@ -782,15 +783,8 @@ void MainWindow::compileCSG(bool procevents)
 		if (procevents)
 			QApplication::processEvents();
 		
-		this->root_norm_term = this->root_raw_term;
-		
-		// CSG normalization
-		while (1) {
-			shared_ptr<CSGTerm> n = CSGTerm::normalize(this->root_norm_term);
-			if (this->root_norm_term == n) break;
-			this->root_norm_term = n;
-		}
-		
+		CSGTermNormalizer normalizer;
+		this->root_norm_term = normalizer.normalize(this->root_raw_term);
 		assert(this->root_norm_term);
 
 		root_chain = new CSGChain();
@@ -804,11 +798,7 @@ void MainWindow::compileCSG(bool procevents)
 			
 			highlights_chain = new CSGChain();
 			for (unsigned int i = 0; i < highlight_terms.size(); i++) {
-				while (1) {
-					shared_ptr<CSGTerm> n = CSGTerm::normalize(highlight_terms[i]);
-					if (highlight_terms[i] == n) break;
-					highlight_terms[i] = n;
-				}
+				highlight_terms[i] = normalizer.normalize(highlight_terms[i]);
 				highlights_chain->import(highlight_terms[i]);
 			}
 		}
@@ -821,11 +811,7 @@ void MainWindow::compileCSG(bool procevents)
 			
 			background_chain = new CSGChain();
 			for (unsigned int i = 0; i < background_terms.size(); i++) {
-				while (1) {
-					shared_ptr<CSGTerm> n = CSGTerm::normalize(background_terms[i]);
-					if (background_terms[i] == n) break;
-					background_terms[i] = n;
-				}
+				background_terms[i] = normalizer.normalize(background_terms[i]);
 				background_chain->import(background_terms[i]);
 			}
 		}
@@ -1504,7 +1490,7 @@ void MainWindow::actionFlushCaches()
 #endif
 	dxf_dim_cache.clear();
 	dxf_cross_cache.clear();
-	Module::libs_cache.clear();
+	Module::clear_library_cache();
 }
 
 void MainWindow::viewModeActionsUncheck()