updated the ply exporter to use the blender 2.5 python api

Note's
* exports the mesh without modifiers or transformations applied
* supports UV's vertex colors
* no support for normals yet (missing from data api)
* registers an operator called EXPORT_OT_ply
* no file selector yet. can only fun from python currently
  bpy.ops.EXPORT_OT_ply(filename="/tmp/test.ply")
* removed double lookups on the vertex dict, build face verts to write allong the way.

1 files changed, 131 insertions, 84 deletions

diff --git a/release/io/export_ply.py b/release/io/export_ply.py
index 46d08050302..6471b4b664a 100644
--- a/release/io/export_ply.py
+++ b/release/io/export_ply.py
@@ -1,16 +1,4 @@
-#!BPY
-
-"""
-Name: 'Stanford PLY (*.ply)...'
-Blender: 241
-Group: 'Export'
-Tooltip: 'Export active object to Stanford PLY format'
-"""
-
 import bpy
-import Blender
-from Blender import Mesh, Scene, Window, sys, Image, Draw
-import BPyMesh
 
 __author__ = "Bruce Merry"
 __version__ = "0.93"
@@ -62,85 +50,103 @@ Only one mesh can be exported at a time.
 def rvec3d(v):	return round(v[0], 6), round(v[1], 6), round(v[2], 6)
 def rvec2d(v):	return round(v[0], 6), round(v[1], 6)
 
-def file_callback(filename):
+def write(filename, ob, EXPORT_APPLY_MODIFIERS= True, EXPORT_NORMALS= True, EXPORT_UV= True, EXPORT_COLORS= True):
 	
 	if not filename.lower().endswith('.ply'):
 		filename += '.ply'
 	
-	scn= bpy.data.scenes.active
-	ob= scn.objects.active
 	if not ob:
-		Blender.Draw.PupMenu('Error%t|Select 1 active object')
+		raise Exception("Error, Select 1 active object")
 		return
 	
 	file = open(filename, 'wb')
 	
-	EXPORT_APPLY_MODIFIERS = Draw.Create(1)
-	EXPORT_NORMALS = Draw.Create(1)
-	EXPORT_UV = Draw.Create(1)
-	EXPORT_COLORS = Draw.Create(1)
-	#EXPORT_EDGES = Draw.Create(0)
-	
-	pup_block = [\
-	('Apply Modifiers', EXPORT_APPLY_MODIFIERS, 'Use transformed mesh data.'),\
-	('Normals', EXPORT_NORMALS, 'Export vertex normal data.'),\
-	('UVs', EXPORT_UV, 'Export texface UV coords.'),\
-	('Colors', EXPORT_COLORS, 'Export vertex Colors.'),\
-	#('Edges', EXPORT_EDGES, 'Edges not connected to faces.'),\
-	]
-	
-	if not Draw.PupBlock('Export...', pup_block):
-		return
 	
+	#EXPORT_EDGES = Draw.Create(0)
+	"""
 	is_editmode = Blender.Window.EditMode()
 	if is_editmode:
 		Blender.Window.EditMode(0, '', 0)
 	
 	Window.WaitCursor(1)
+	"""
 	
-	EXPORT_APPLY_MODIFIERS = EXPORT_APPLY_MODIFIERS.val
-	EXPORT_NORMALS = EXPORT_NORMALS.val
-	EXPORT_UV = EXPORT_UV.val
-	EXPORT_COLORS = EXPORT_COLORS.val
-	#EXPORT_EDGES = EXPORT_EDGES.val
-	
-	mesh = BPyMesh.getMeshFromObject(ob, None, EXPORT_APPLY_MODIFIERS, False, scn)
+	#mesh = BPyMesh.getMeshFromObject(ob, None, EXPORT_APPLY_MODIFIERS, False, scn) # XXX
+	mesh = ob.data
 	
 	if not mesh:
-		Blender.Draw.PupMenu('Error%t|Could not get mesh data from active object')
+		raise ("Error, could not get mesh data from active object")
 		return
 	
-	mesh.transform(ob.matrixWorld)
+	# mesh.transform(ob.matrixWorld) # XXX
 	
-	faceUV = mesh.faceUV
-	vertexUV = mesh.vertexUV
-	vertexColors = mesh.vertexColors
+	faceUV = len(mesh.uv_layers) > 0
+	vertexUV = len(mesh.sticky) > 0
+	vertexColors = len(mesh.vcol_layers) > 0
 	
-	if (not faceUV) and (not vertexUV):		EXPORT_UV = False
+	if (not faceUV) and (not vertexUV):	EXPORT_UV = False
 	if not vertexColors:					EXPORT_COLORS = False
 	
 	if not EXPORT_UV:						faceUV = vertexUV = False
 	if not EXPORT_COLORS:					vertexColors = False
+		
+	if faceUV:
+		active_uv_layer = None
+		for lay in mesh.uv_layers:
+			if lay.active:
+				active_uv_layer= lay.data
+				break
+		if not active_uv_layer:
+			EXPORT_UV = False
+			faceUV = None
+	
+	if vertexColors:
+		active_col_layer = None
+		for lay in mesh.vcol_layers:
+			if lay.active:
+				active_col_layer= lay.data
+		if not active_col_layer:
+			EXPORT_COLORS = False
+			vertexColors = None
 	
 	# incase
 	color = uvcoord = uvcoord_key = normal = normal_key = None
 	
-	verts = [] # list of dictionaries
+	mesh_verts = mesh.verts # save a lookup
+	ply_verts = [] # list of dictionaries
 	# vdict = {} # (index, normal, uv) -> new index
-	vdict = [{} for i in xrange(len(mesh.verts))]
+	vdict = [{} for i in xrange(len(mesh_verts))]
+	ply_faces = [[] for f in xrange(len(mesh.faces))]
 	vert_count = 0
 	for i, f in enumerate(mesh.faces):
+		
+		
 		smooth = f.smooth
+		# XXX need face normals
+		"""
 		if not smooth:
 			normal = tuple(f.no)
 			normal_key = rvec3d(normal)
-			
-		if faceUV:			uv = f.uv
-		if vertexColors:	col = f.col
-		for j, v in enumerate(f):
+		"""
+		if faceUV:
+			uv = active_uv_layer[i]
+			uv = uv.uv1, uv.uv2, uv.uv3, uv.uv4 # XXX - crufty :/
+		if vertexColors:
+			col = active_col_layer[i]
+			col = col.color1, col.color2, col.color3, col.color4
+		
+		f_verts= list(f.verts)
+		if not f_verts[3]: f_verts.pop() # XXX face length should be 3/4, not always 4
+		
+		pf= ply_faces[i]
+		for j, vidx in enumerate(f_verts):
+			v = mesh_verts[vidx]
+			"""
 			if smooth:
 				normal=		tuple(v.no)
 				normal_key = rvec3d(normal)
+			"""
+			normal_key = None # XXX
 			
 			if faceUV:
 				uvcoord=	uv[j][0], 1.0-uv[j][1]
@@ -149,33 +155,41 @@ def file_callback(filename):
 				uvcoord=	v.uvco[0], 1.0-v.uvco[1]
 				uvcoord_key = rvec2d(uvcoord)
 			
-			if vertexColors:	color=		col[j].r, col[j].g, col[j].b
+			if vertexColors:
+				color=		col[j]
+				color= int(color[0]*255.0), int(color[1]*255.0), int(color[2]*255.0)
 			
 			
 			key = normal_key, uvcoord_key, color
 			
-			vdict_local = vdict[v.index]
+			vdict_local = vdict[vidx]
+			pf_vidx = vdict_local.get(key) # Will be None initially
 			
-			if (not vdict_local) or (not vdict_local.has_key(key)):
-				vdict_local[key] = vert_count;
-				verts.append( (tuple(v.co), normal, uvcoord, color) )
+			if pf_vidx == None: # same as vdict_local.has_key(key)
+				pf_vidx = vdict_local[key] = vert_count;
+				ply_verts.append((vidx, normal, uvcoord, color))
 				vert_count += 1
-	
+			
+			pf.append(pf_vidx)
 	
 	file.write('ply\n')
 	file.write('format ascii 1.0\n')
-	file.write('comment Created by Blender3D %s - www.blender.org, source file: %s\n' % (Blender.Get('version'), Blender.Get('filename').split('/')[-1].split('\\')[-1] ))
+	version = "2.5" # Blender.Get('version')
+	file.write('comment Created by Blender3D %s - www.blender.org, source file: %s\n' % (version, bpy.data.filename.split('/')[-1].split('\\')[-1] ))
 	
-	file.write('element vertex %d\n' % len(verts))
+	file.write('element vertex %d\n' % len(ply_verts))
 	
 	file.write('property float x\n')
 	file.write('property float y\n')
 	file.write('property float z\n')
+	
+	# XXX 
+	"""
 	if EXPORT_NORMALS:
 		file.write('property float nx\n')
 		file.write('property float ny\n')
 		file.write('property float nz\n')
-	
+	"""
 	if EXPORT_UV:
 		file.write('property float s\n')
 		file.write('property float t\n')
@@ -188,41 +202,74 @@ def file_callback(filename):
 	file.write('property list uchar uint vertex_indices\n')
 	file.write('end_header\n')
 
-	for i, v in enumerate(verts):
-		file.write('%.6f %.6f %.6f ' % v[0]) # co
+	for i, v in enumerate(ply_verts):
+		file.write('%.6f %.6f %.6f ' % tuple(mesh_verts[v[0]].co)) # co
+		"""
 		if EXPORT_NORMALS:
 			file.write('%.6f %.6f %.6f ' % v[1]) # no
-		
-		if EXPORT_UV:
-			file.write('%.6f %.6f ' % v[2]) # uv
-		if EXPORT_COLORS:
-			file.write('%u %u %u' % v[3]) # col
+		"""
+		if EXPORT_UV:			file.write('%.6f %.6f ' % v[2]) # uv
+		if EXPORT_COLORS:		file.write('%u %u %u' % v[3]) # col
 		file.write('\n')
 	
-	for (i, f) in enumerate(mesh.faces):
-		file.write('%d ' % len(f))
-		smooth = f.smooth
-		if not smooth: no = rvec3d(f.no)
-		
-		if faceUV:			uv = f.uv
-		if vertexColors:	col = f.col
-		for j, v in enumerate(f):
-			if f.smooth:		normal=		rvec3d(v.no)
-			else:				normal=		no
-			if faceUV:			uvcoord=	rvec2d((uv[j][0], 1.0-uv[j][1]))
-			elif vertexUV:		uvcoord=	rvec2d((v.uvco[0], 1.0-v.uvco[1]))
-			if vertexColors:	color=		col[j].r, col[j].g, col[j].b
-			
-			file.write('%d ' % vdict[v.index][normal, uvcoord, color])
-			
-		file.write('\n')
+	for pf in ply_faces:
+		if len(pf)==3:		file.write('3 %d %d %d\n' % tuple(pf))
+		else:				file.write('4 %d %d %d %d\n' % tuple(pf))
+	
 	file.close()
+	print("writing", filename, "done")
 	
+	# XXX
+	"""
 	if is_editmode:
 		Blender.Window.EditMode(1, '', 0)
+	"""
 
+"""
 def main():
 	Blender.Window.FileSelector(file_callback, 'PLY Export', Blender.sys.makename(ext='.ply'))
 
 if __name__=='__main__':
 	main()
+"""
+
+class EXPORT_OT_ply(bpy.types.Operator):
+	'''
+	Operator documentatuon text, will be used for the operator tooltip and python docs.
+	'''
+	__label__ = "Export PLY"
+	
+	# List of operator properties, the attributes will be assigned
+	# to the class instance from the operator settings before calling.
+	
+	__props__ = [
+			bpy.props.StringProperty(attr="filename", name="File Name", description="File name used for exporting the PLY file", maxlen= 1024, default= "")
+	]
+	
+	def poll(self, context):
+		print("Poll")
+		return context.active_object != None
+	
+	def execute(self, context):
+		# print("Selected: " + context.active_object.name)
+
+		if not self.filename:
+			raise Exception("filename not set")
+			
+		write(self.filename, context.active_object)
+
+		return ('FINISHED',)
+	
+	def invoke(self, context, event):
+		print("Invoke", context, event)
+		# XXX file selector
+		self.execute(context)
+		return ('FINISHED',)
+
+
+bpy.ops.add(EXPORT_OT_ply)
+
+if __name__ == "__main__":
+	bpy.ops.EXPORT_OT_ply(filename="/tmp/test.ply")
+
+