From 7ef0e6407e21acdcd9865651a12b40d6a3cb3c0e Mon Sep 17 00:00:00 2001
From: Mikko Rasa <tdb@tdb.fi>
Date: Wed, 5 Sep 2007 05:50:15 +0000
Subject: [PATCH] Blender exporter: Finish triangle strip support

---
 mesh_export.py | 56 ++++++++++++++++++++++++++++++--------------------
 1 file changed, 34 insertions(+), 22 deletions(-)

diff --git a/mesh_export.py b/mesh_export.py
index 016db5bf..cdab35f3 100644
--- a/mesh_export.py
+++ b/mesh_export.py
@@ -56,7 +56,7 @@ class Face:
 		self.edges=[]
 		self.verts=[v for v in mf.verts]
 		self.flag=False
-	
+
 	def __getattr__(self, attr):
 		return getattr(self._mface, attr)
 
@@ -104,6 +104,8 @@ class Exporter:
 			self.out_file=sys.stdout
 		else:
 			self.out_file=file(fn, "w")
+		self.use_strips=True
+		self.use_degen_tris=True
 
 	def find_smooth_group(self, face, sg):
 		face.smooth_group=sg
@@ -136,19 +138,12 @@ class Exporter:
 			result=[v2, v1]
 		else:
 			result=[v1, v2]
-			
-		print edge.key
-		print [v.index for v in result]
 
 		while 1:
 			face.flag=True
-			print "face =",[v.index for v in face.verts]
-			print [e.key for e in face.edges]
 			for i in range(2, len(face.verts)):
 				v=face.get_following_vertex(result[-2], result[-1])
-				print v.index
 				result.append(v)
-			print [v.index for v in result]
 
 			i1=result[-2].index
 			i2=result[-1].index
@@ -193,29 +188,42 @@ class Exporter:
 				smooth_groups.append(sg)
 				self.find_smooth_group(f, sg)
 
-		strips=[]
-		"""XXX Stripping and smoothing are currently imcompatible
 		for sg in smooth_groups:
-			for f in sg.faces:
-				if not f.flag:
-					strip=self.create_strip(f)
-					if strip:
-						strips.append(strip)"""
-
-		for i in mesh.verts:
-			print i.co
+			sg.find_vertices()
 
-		#print [v.index for v in strips[0]]
+		strips=[]
+		if self.use_strips:
+			for sg in smooth_groups:
+				for f in sg.faces:
+					if not f.flag:
+						strip=self.create_strip(f)
+						if strip:
+							strips.append(strip)
+
+			if self.use_degen_tris:
+				big_strip=[]
+				for s in strips:
+					if big_strip:
+						big_strip+=[big_strip[-1], s[0]]
+					big_strip+=s
+
+				for f in faces:
+					if not f.flag:
+						if big_strip:
+							big_strip+=[big_strip[-1], f.verts[0]]
+						big_strip+=[f.verts[i] for i in (0, 1, -1)]
+						if len(f.verts)==4:
+							big_strip.append(f.verts[-2])
+						f.flag=True
+
+				strips=[big_strip]
 
 		verts=[]
 		for sg in smooth_groups:
-			sg.find_vertices()
 			for v in sg.verts:
 				v.index=len(verts)
 				verts.append(v)
 
-		#print [v.index for v in strips[0]]
-
 		self.out_file.write("vertices NORMAL3_VERTEX3\n{\n")
 		for v in verts:
 			self.out_file.write("\tnormal3 %f %f %f;\n"%tuple(v.no))
@@ -223,8 +231,12 @@ class Exporter:
 		self.out_file.write("};\n")
 		for s in strips:
 			self.out_file.write("batch TRIANGLE_STRIP\n{\n\tindices")
+			n=0
 			for v in s:
 				self.out_file.write(" %u"%v.index)
+				n+=1;
+				if n%32==0:
+					self.out_file.write(";\n\tindices")
 			self.out_file.write(";\n};\n")
 
 		first=True
-- 
2.45.2