From: Mikko Rasa <tdb@tdb.fi>
Date: Sat, 9 Oct 2010 06:51:32 +0000 (+0000)
Subject: Blender exporter:
X-Git-Url: http://git.tdb.fi/?a=commitdiff_plain;h=2663d392c1c60e0ca511bb836010124024da3276;p=libs%2Fgl.git

Blender exporter:
Support exporting mspgl objects
Add ability to create a texture from material colors
---

diff --git a/mesh_export.py b/mesh_export.py
index 4c18bb48..4265ca3d 100644
--- a/mesh_export.py
+++ b/mesh_export.py
@@ -129,6 +129,7 @@ class Mesh:
 		self._mesh = m
 		self.verts = [Vertex(v) for v in m.verts]
 		self.faces = [Face(f) for f in m.faces]
+		self.materials = m.materials[:]
 
 		for f in self.faces:
 			for i in range(len(f.verts)):
@@ -158,6 +159,14 @@ class Mesh:
 		return getattr(self._mesh, attr)
 
 	def splice(self, other):
+		material_map = []
+		for m in other.materials:
+			if m in self.materials:
+				material_map.append(self.materials.index(m))
+			else:
+				material_map.append(len(self.materials))
+				self.materials.append(m)
+
 		offset = len(self.verts)
 		for v in other.verts:
 			v.index += offset
@@ -166,6 +175,7 @@ class Mesh:
 		offset = len(self.faces)
 		for f in other.faces:
 			f.index += offset
+			f.mat = material_map[f.mat]
 			self.faces.append(f)
 
 		for e in other.edges.itervalues():
@@ -173,6 +183,11 @@ class Mesh:
 			self.edges[e.key] = e
 
 		self.lines += other.lines
+	
+	def generate_material_uv(self):
+		for f in self.faces:
+			f.uv = ([(f.mat+0.5)/len(self.materials), 0.5],)*len(f.verts)
+		self.faceUV = True
 
 	def split_vertices(self, find_group_func, debug):
 		groups = []
@@ -389,13 +404,39 @@ class VertexCache:
 		return hits
 
 
-class Exporter:
+class OutFile:
 	def __init__(self, fn):
-		self.filename = fn
 		if fn==None:
-			self.out_file = sys.stdout
+			self.file = sys.stdout
 		else:
-			self.out_file = file(fn, "w")
+			self.file = open(fn, "w")
+		self.indent = 0
+
+	def make(self, kwd, *params):
+		pstr = ""
+		for p in params:
+			if type(p)==float:
+				pstr += " %.6g"%p
+			else:
+				pstr += " %s"%p
+		return "%s%s"%(kwd, pstr)
+
+	def write(self, kwd, *params):
+		self.file.write("%s%s;\n"%('\t'*self.indent, self.make(kwd, *params)))
+
+	def begin(self, kwd, *params):
+		i = '\t'*self.indent
+		self.file.write("%s%s\n%s{\n"%(i, self.make(kwd, *params), i))
+		self.indent += 1
+
+	def end(self):
+		self.indent -= 1
+		self.file.write("%s};\n"%('\t'*self.indent))
+
+
+class Exporter:
+	def __init__(self, fn):
+		self.out_file = OutFile(fn)
 		self.use_strips = True
 		self.use_degen_tris = True
 		self.max_strip_len = 1024
@@ -404,6 +445,8 @@ class Exporter:
 		self.export_lines = True
 		self.tbn_vecs = False
 		self.compound = False
+		self.object = False
+		self.material_tex = False
 		self.debug = False
 		self.strip_debug = False
 		self.split_debug = False
@@ -525,6 +568,7 @@ class Exporter:
 		mesh.getFromObject(objs[0])
 		mesh = Mesh(mesh)
 		if self.compound:
+			# Must keep a ref to each Blender mesh
 			bmeshes = []
 			for o in objs[1:]:
 				bmesh = Blender.Mesh.New("export_tmp")
@@ -543,6 +587,9 @@ class Exporter:
 
 		mesh.compute_normals()
 
+		if self.material_tex:
+			mesh.generate_material_uv()
+
 		if mesh.faceUV:
 			mesh.split_uv(self.split_debug)
 			if self.debug:
@@ -557,56 +604,90 @@ class Exporter:
 		if self.use_strips:
 			strips, loose = self.stripify(mesh)
 
-		self.out_file.write("vertices NORMAL3")
+		if self.object:
+			self.out_file.begin("mesh")
+
+		fmt = "NORMAL3"
 		if mesh.faceUV:
-			self.out_file.write("_TEXCOORD2")
+			fmt += "_TEXCOORD2"
 			if self.tbn_vecs:
-				self.out_file.write("_ATTRIB33_ATTRIB34")
-		self.out_file.write("_VERTEX3\n{\n")
+				fmt += "_ATTRIB33_ATTRIB34"
+		fmt += "_VERTEX3"
+		self.out_file.begin("vertices", fmt)
 		norm = None
 		uv = None
 		tan = None
 		bino = None
 		for v in mesh.verts:
 			if v.no!=norm:
-				self.out_file.write("\tnormal3 %f %f %f;\n"%tuple(v.no))
+				self.out_file.write("normal3", *v.no)
 				norm = v.no
 			if v.uv!=uv:
-				self.out_file.write("\ttexcoord2 %f %f;\n"%tuple(v.uv))
+				self.out_file.write("texcoord2", *v.uv)
 				uv = v.uv
 			if v.tan!=tan:
-				self.out_file.write("\tattrib3 3 %f %f %f;\n"%tuple(v.tan))
+				self.out_file.write("attrib3", 3, *v.tan)
 				tan = v.tan
 			if v.bino!=bino:
-				self.out_file.write("\tattrib3 4 %f %f %f;\n"%tuple(v.bino))
+				self.out_file.write("attrib3", 4, *v.bino)
 				bino = v.bino
-			self.out_file.write("\tvertex3 %f %f %f;\n"%tuple(v.co))
-		self.out_file.write("};\n")
+			self.out_file.write("vertex3", *v.co)
+		self.out_file.end()
 		for s in strips:
-			self.out_file.write("batch TRIANGLE_STRIP\n{\n\tindices")
+			self.out_file.begin("batch", "TRIANGLE_STRIP")
+			indices = []
 			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
-		for f in loose:
-			if first:
-				self.out_file.write("batch TRIANGLES\n{\n")
-				first = False
-			for i in range(2, len(f.verts)):
-				self.out_file.write("\tindices %u %u %u;\n"%(f.verts[0].index, f.verts[i-1].index, f.verts[i].index))
-		if not first:
-			self.out_file.write("};\n")
+				indices.append(v.index)
+				if len(indices)>=32:
+					self.out_file.write("indices", *indices)
+					indices = []
+			if indices:
+				self.out_file.write("indices", *indices)
+			self.out_file.end()
+
+		if loose:
+			self.out_file.begin("batch", "TRIANGLES")
+			for f in loose:
+				for i in range(2, len(f.verts)):
+					self.out_file.write("indices", f.verts[0].index, f.verts[i-1].index, f.verts[i].index)
+			self.out_file.end()
 
 		if self.export_lines and mesh.lines:
-			self.out_file.write("batch LINES\n{\n")
+			self.out_file.write("batch", "LINES")
 			for l in mesh.lines:
-				self.out_file.write("\tindices %u %u;\n"%(l.verts[0].index, l.verts[1].index))
-			self.out_file.write("};\n")
+				self.out_file.write("indices", l.verts[0].index, l.verts[1].index)
+			self.out_file.end()
+
+		if self.object:
+			self.out_file.end()
+			self.out_file.begin("technique")
+			self.out_file.begin("pass", '""')
+			if self.material_tex:
+				self.out_file.begin("material")
+				self.out_file.write("diffuse", 1.0, 1.0, 1.0, 1.0)
+				self.out_file.end()
+				self.out_file.begin("texunit", 0)
+				self.out_file.begin("texture2d")
+				self.out_file.write("min_filter", "NEAREST")
+				self.out_file.write("mag_filter", "NEAREST")
+				self.out_file.write("storage", "RGB", len(mesh.materials), 1, 0)
+				texdata = '"'
+				for m in mesh.materials:
+					texdata += "\\x%02X\\x%02X\\x%02X"%(int(m.R*255), int(m.G*255), int(m.B*255))
+				texdata += '"'
+				self.out_file.write("raw_data", texdata)
+				self.out_file.end()
+				self.out_file.end()
+			elif mesh.materials:
+				m = mesh.materials[0]
+				self.out_file.begin("material")
+				self.out_file.write("diffuse", m.R, m.G, m.B, 1.0)
+				self.out_file.write("ambient", m.R*m.amb, m.G*m.amb, m.B*m.amb, 1.0)
+				self.out_file.write("specular", m.specR, m.specG, m.specB, 1.0)
+				self.out_file.end()
+			self.out_file.end()
+			self.out_file.end()
 
 
 class FrontEnd:
@@ -623,6 +704,8 @@ class FrontEnd:
 		self.export_lines = Blender.Draw.Create(self.config.get('export_lines', False))
 		self.tbn_vecs = Blender.Draw.Create(self.config.get('tbn_vecs', False))
 		self.compound = Blender.Draw.Create(self.config.get('compound', False))
+		self.object = Blender.Draw.Create(self.config.get('object', False))
+		self.material_tex = Blender.Draw.Create(self.config.get('material_tex', False))
 		self.debug = Blender.Draw.Create(self.config.get('debug', False))
 		self.strip_debug = Blender.Draw.Create(self.config.get('strip_debug', False))
 		self.split_debug = Blender.Draw.Create(self.config.get('split_debug', False))
@@ -635,6 +718,8 @@ class FrontEnd:
 				("Export lines", self.export_lines, "Export lone edges as lines"),
 				("Compute T/B vecs", self.tbn_vecs, "Compute tangent/binormal vectors for bumpmapping"),
 				("Compound", self.compound, "Create a compound mesh of all selected objects"),
+				("Object", self.object, "Export as an object"),
+				("Material texture", self.material_tex, "Create a texture from material data"),
 				("Debugging options"),
 				("Debug", self.debug),
 				("Debug strips", self.strip_debug),
@@ -642,7 +727,10 @@ class FrontEnd:
 		if ret:
 			dirname = self.temp_config.get("dirname", Blender.sys.dirname(Blender.Get("filename")))
 			obj = Blender.Object.GetSelected()[0]
-			Blender.Window.FileSelector(self.export, "Export MSP GL mesh", "%s/%s.mesh"%(dirname, obj.name))
+			ext = "mesh"
+			if self.object.val:
+				ext = "object"
+			Blender.Window.FileSelector(self.export, "Export MSP GL mesh", "%s/%s.%s"%(dirname, obj.name, ext))
 
 	def draw(self):
 		pass
@@ -656,6 +744,8 @@ class FrontEnd:
 		self.config['export_lines'] = self.export_lines.val
 		self.config['tbn_vecs'] = self.tbn_vecs.val
 		self.config['compound'] = self.compound.val
+		self.config['object'] = self.object.val
+		self.config['material_tex'] = self.material_tex.val
 		self.config['debug'] = self.debug.val
 		self.config['strip_debug'] = self.strip_debug.val
 		self.config['split_debug'] = self.split_debug.val
@@ -674,6 +764,8 @@ class FrontEnd:
 		exp.export_lines = self.export_lines.val
 		exp.tbn_vecs = self.tbn_vecs.val
 		exp.compound = self.compound.val
+		exp.object = self.object.val
+		exp.material_tex = self.material_tex.val
 		exp.debug = self.debug.val
 		exp.strip_debug = self.strip_debug.val
 		exp.split_debug = self.split_debug.val