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# ***** BEGIN GPL LICENSE BLOCK *****
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License
# as published by the Free Software Foundation; either version 2
# of the License, or (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software Foundation,
# Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
#
# ***** END GPL LICENCE BLOCK *****
# Set the command name so that DarkRadiant recognises this file
__commandName__ = 'objExport'
__commandDisplayName__ = 'Export OBJ...'
# The actual algorithm called by DarkRadiant is contained in the execute() function
def execute():
script = "DarkRadiant Wavefront OBJ Export (*.obj)"
author = "Python port by greebo, based on original exporter C++ code in DarkRadiant and the ASE exporter scripts"
version = "0.2"
import darkradiant as dr
# Check if we have a valid selection
selectionInfo = GlobalSelectionSystem.getSelectionInfo()
# Don't allow empty selections or selected components only
if selectionInfo.totalCount == 0 or selectionInfo.totalCount == selectionInfo.componentCount:
errMsg = GlobalDialogManager.createMessageBox('No selection', 'Nothing selected, cannot run exporter.', dr.Dialog.ERROR)
errMsg.run()
return
# An exportable object found in the map
class Geometry(object):
name = '' # Name of the object to be exported
vertices = [] # Vertices
texcoords = [] # Texture coordinates
faces = [] # Each face in turn is an array of indices referencing the vertices and texcoords
# For simplicity, we assume that the referenced vertices and texcoords always
# have the same global index number.
def __init__(self, name):
self.name = name
self.vertices = []
self.texcoords = []
self.faces = []
# An exportable object found in the map
class Geometries(object):
vertexCount = 0 # Global Vertex Index (every vertex in an OBJ file has a unique number)
objects = [] # List of Geometry objects
# We put all of the objects we collect in the map into this array
# Before we write it to the output stream the vertices can be processed (e.g. centered)
geomlist = Geometries()
def processBrush(brushnode):
# Create a new exportable object
geometry = Geometry('Brush{0}'.format(len(geomlist.objects)))
numfaces = brushnode.getNumFaces()
for index in range(numfaces):
facenode = brushnode.getFace(index)
shader = facenode.getShader()
# Tels: skip if caulk and no caulk should be exported
if (shader == 'textures/common/caulk') and (int(GlobalRegistry.get('user/scripts/objExport/exportcaulk'))) == 0:
continue
winding = facenode.getWinding()
# Remember the index of the first vertex
firstVertex = geomlist.vertexCount
for point in winding:
# Write coordinates into the export buffers
geometry.vertices.append(point.vertex)
geometry.texcoords.append(point.texcoord)
# Keep track of the exported vertices
geomlist.vertexCount += 1
# Append the face to the list, referencing vertices from firstVertex to the current count
# Face indices are 1-based, so increase by 1 each time
# Reverse the list to produce the correct face normal direction
geometry.faces.append([i for i in reversed(range(firstVertex+1, geomlist.vertexCount+1))])
print('Processed brush geometry: {0} verts and {1} faces'.format(len(geometry.vertices), len(geometry.faces)))
geomlist.objects.append(geometry)
return
def processPatch(patchnode):
shader = patchnode.getShader()
# Tels: skip if caulk and no caulk should be exported
if shader == 'textures/common/caulk' and int(GlobalRegistry.get('user/scripts/objExport/exportcaulk')) == 0:
return
# Create a new exportable object
geometry = Geometry('Patch{0}'.format(len(geomlist.objects)))
mesh = patchnode.getTesselatedPatchMesh()
# Remember the index of the first vertex
firstVertex = geomlist.vertexCount
for h in range(0, mesh.height):
for w in range(0, mesh.width):
point = mesh.vertices[mesh.width*h + w]
# Write coordinates into the lists
geometry.vertices.append(point.vertex)
geometry.texcoords.append(point.texcoord)
# Keep track of the exported vertices
geomlist.vertexCount += 1
# Starting from the second row, we're gathering the faces
if h > 0 and w > 0:
# Gather the indices forming a quad
v1 = 1 + firstVertex + h*mesh.width + w;
v2 = 1 + firstVertex + (h-1)*mesh.width + w;
v3 = 1 + firstVertex + (h-1)*mesh.width + (w-1);
v4 = 1 + firstVertex + h*mesh.width + (w-1);
# Construct the quad
geometry.faces.append([v1, v4, v3, v2])
print('Processed patch geometry: {0} verts and {1} faces'.format(len(geometry.vertices), len(geometry.faces)))
geomlist.objects.append(geometry)
return
# Traversor class to visit child primitives of entities
class nodeVisitor(dr.SceneNodeVisitor):
def pre(self, scenenode):
if scenenode.isBrush():
processBrush(scenenode.getBrush())
elif scenenode.isPatch():
processPatch(scenenode.getPatch())
# Traverse all child nodes, regardless of type
return 1
class SelectionWalker(dr.SelectionVisitor):
def visit(self, scenenode):
if scenenode.isBrush():
processBrush(scenenode.getBrush())
elif scenenode.isPatch():
processPatch(scenenode.getPatch())
elif scenenode.isEntity():
# greebo: Found an entity, this could be a func_static or similar
# Traverse children of this entity using a new walker
nodewalker = nodeVisitor()
scenenode.traverse(nodewalker)
else:
print('WARNING: unsupported node type selected. Skipping: ' + scenenode.getNodeType())
# Dialog
dialog = GlobalDialogManager.createDialog(script + ' v' + version)
# Add an entry box and remember the handle
fileHandle = dialog.addEntryBox("Filename:")
dialog.setElementValue(fileHandle, GlobalRegistry.get('user/scripts/objExport/recentFilename'))
# Add an entry box and remember the handle
pathHandle = dialog.addPathEntry("Save path:", True)
dialog.setElementValue(pathHandle, GlobalRegistry.get('user/scripts/objExport/recentPath'))
# Add a checkbox
centerObjectsHandle = dialog.addCheckbox("Center objects at 0,0,0 origin")
dialog.setElementValue(centerObjectsHandle, GlobalRegistry.get('user/scripts/objExport/centerObjects'))
# Add another checkbox
exportCaulkHandle = dialog.addCheckbox("Export caulked faces")
dialog.setElementValue(exportCaulkHandle, GlobalRegistry.get('user/scripts/objExport/exportcaulk'))
if dialog.run() == dr.Dialog.OK:
fullpath = dialog.getElementValue(pathHandle) + '/' + dialog.getElementValue(fileHandle)
if not fullpath.endswith('.obj'):
fullpath = fullpath + '.obj'
# Save the path for later use
GlobalRegistry.set('user/scripts/objExport/recentFilename', dialog.getElementValue(fileHandle))
GlobalRegistry.set('user/scripts/objExport/recentPath', dialog.getElementValue(pathHandle))
GlobalRegistry.set('user/scripts/objExport/centerObjects', dialog.getElementValue(centerObjectsHandle))
GlobalRegistry.set('user/scripts/objExport/exportcaulk', dialog.getElementValue(exportCaulkHandle))
try:
file = open(fullpath, 'r')
file.close()
prompt = GlobalDialogManager.createMessageBox('Warning', 'The file ' + fullpath + ' already exists. Do you wish to overwrite it?', dr.Dialog.ASK)
if prompt.run() == dr.Dialog.YES:
overwrite = True
else:
overwrite = False
except IOError:
overwrite = True
if overwrite:
walker = SelectionWalker()
GlobalSelectionSystem.foreachSelected(walker)
# greebo: Check if we should center objects at the 0,0,0 origin
if int(dialog.getElementValue(centerObjectsHandle)) == 1:
# center objects at 0,0,0
xlist = []
ylist = []
zlist = []
for item in geomlist.objects:
for vert in item.vertices:
xlist.append(vert.x())
ylist.append(vert.y())
zlist.append(vert.z())
xcenter=(max(xlist)+min(xlist))/2
ycenter=(max(ylist)+min(ylist))/2
zcenter=(max(zlist)+min(zlist))/2
for item in geomlist.objects:
for vert in item.vertices:
vert -= dr.Vector3(xcenter, ycenter, zcenter)
# This string will hold our export data
data = str()
for x in geomlist.objects:
objstr = str()
# Group name (g)
objstr = objstr + "g {0}\n\n".format(x.name)
# Vertex list (v)
for vert in x.vertices:
objstr = objstr + "v {0} {1} {2}\n".format(vert.x(), vert.y(), vert.z())
objstr = objstr + "\n"
# Texture coord list (vt)
for texcoord in x.texcoords:
objstr = objstr + "vt {0} {1}\n".format(texcoord.x(), 1-texcoord.y()) # reverse V coord
objstr = objstr + "\n"
# Face list (f)
for faceIndices in x.faces:
objstr = objstr + "f"
for faceIndex in faceIndices:
objstr = objstr + " {0}/{1}".format(faceIndex, faceIndex)
objstr = objstr + "\n"
objstr = objstr + "\n"
data = data + objstr
# Write the compiled data to the output file
file = open(fullpath, 'w')
file.write(data)
file.close()
print('Done writing OBJ data to {0}'.format(fullpath))
# __executeCommand__ evaluates to true after DarkRadiant has successfully initialised
if __executeCommand__:
execute()
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