def polygonToVolume(obj):
# Checks if the input obj is a PolygonObject
if not obj.IsInstanceOf(c4d.Opolygon):
raise TypeError("obj is not a c4d.Opolygon.")
# Retrieves the world matrices of the object
matrix = obj.GetMg()
# Creates a BaseArray (list) of all points position in world space
vertices = maxon.BaseArray(maxon.Vector)
vertices.Resize(obj.GetPointCount())
for i, pt in enumerate(obj.GetAllPoints()):
vertices[i] = pt * matrix
# Sets polygons
polygons = maxon.BaseArray(maxon.frameworks.volume.VolumeConversionPolygon)
polygons.Resize(obj.GetPolygonCount())
for i, poly in enumerate(obj.GetAllPolygons()):
newpoly = maxon.frameworks.volume.VolumeConversionPolygon()
newpoly.a = poly.a
newpoly.b = poly.b
newpoly.c = poly.c
if poly.IsTriangle():
newpoly.SetTriangle()
else:
newpoly.d = poly.d
polygons[i] = newpoly
polygonObjectMatrix = maxon.Matrix()
polygonObjectMatrix.off = obj.GetMg().off
polygonObjectMatrix.v1 = obj.GetMg().v1
polygonObjectMatrix.v2 = obj.GetMg().v2
polygonObjectMatrix.v3 = obj.GetMg().v3
gridSize = 10
bandWidthInterior = 1
bandWidthExterior = 1
thread = maxon.ThreadRef()
# Before R21
if c4d.GetC4DVersion() < 21000:
volumeRef = maxon.frameworks.volume.VolumeToolsInterface.MeshToVolume(
vertices, polygons, polygonObjectMatrix, gridSize,
bandWidthInterior, bandWidthExterior, thread, None)
else:
volumeRef = maxon.frameworks.volume.VolumeToolsInterface.MeshToVolume(
vertices, polygons, polygonObjectMatrix, gridSize,
bandWidthInterior, bandWidthExterior, thread,
maxon.POLYGONCONVERSIONFLAGS.NONE, None)
return volumeRef
def main():
# Checks if there is an active object
if op is None:
raise ValueError("op is None, please select one object.")
# Checks if the input obj is a PolygonObject
if not op.IsInstanceOf(c4d.Opolygon):
raise TypeError("obj is not a c4d.Opolygon.")
# Retrieves the world matrices of the object
matrix = op.GetMg()
# Creates a BaseArray (list) of all points position in world space
vertices = maxon.BaseArray(maxon.Vector)
vertices.Resize(op.GetPointCount())
for i, pt in enumerate(op.GetAllPoints()):
vertices[i] = pt * matrix
# Sets polygons
polygons = maxon.BaseArray(maxon.frameworks.volume.VolumeConversionPolygon)
polygons.Resize(op.GetPolygonCount())
for i, poly in enumerate(op.GetAllPolygons()):
newPoly = maxon.frameworks.volume.VolumeConversionPolygon()
newPoly.a = poly.a
newPoly.b = poly.b
newPoly.c = poly.c
if poly.IsTriangle():
newPoly.SetTriangle()
else:
newPoly.d = poly.d
polygons[i] = newPoly
polygonObjectMatrix = maxon.Matrix()
gridSize = 10
bandWidthInterior = 1
bandWidthExterior = 1
# Converts the polygon into a volume
# Before R21
if c4d.GetC4DVersion() < 21000:
volumeRef = maxon.frameworks.volume.VolumeToolsInterface.MeshToVolume(
vertices, polygons, polygonObjectMatrix, gridSize,
bandWidthInterior, bandWidthExterior, maxon.ThreadRef(), None)
else:
volumeRef = maxon.frameworks.volume.VolumeToolsInterface.MeshToVolume(
vertices, polygons, polygonObjectMatrix, gridSize,
bandWidthInterior, bandWidthExterior, maxon.ThreadRef(),
maxon.POLYGONCONVERSIONFLAGS.NONE, None)
# Creates a Volume Object to store the previous volume calculated
volumeObj = c4d.BaseObject(c4d.Ovolume)
if volumeObj is None:
raise MemoryError("Failed to create a volume object.")
doc.InsertObject(volumeObj)
volumeObj.SetVolume(volumeRef)
# Converts back to Polygon
polyObject = maxon.frameworks.volume.VolumeToolsInterface.VolumeToMesh(
volumeRef, 0.0, 1)
doc.InsertObject(polyObject)
# Pushes an update event to Cinema 4D
c4d.EventAdd()