I am still trying to Replace a bunch of instances with a different block definition using Python. It seems there is always another roadblock in the way.
Since ReplaceBlock doesn’t appear to be scriptable, I am getting the transforms of all instances I want to replace and then want to use InsertBlock with a transform to insert the new blocks.
But I am getting an error that it could not convert the matrix to a point3d, but the rhinoscript syntax for InsertBlock states that I can just use a name and a transform:
https://developer.rhino3d.com/api/rhinoscript/block_methods/insertblock.htm
How do I pass the transform to it?
Here is my Python code:
def get_block_instances_and_transforms(block_name):
"""Get the instances and transforms of a block."""
block_instances = rs.BlockInstances(block_name)
if not block_instances:
return []
transforms = []
for instance in block_instances:
rhobj = sc.doc.Objects.Find(instance)
if type(rhobj.Geometry) is Rhino.Geometry.InstanceReferenceGeometry:
iref = rhobj.Geometry
xform = iref.Xform
transforms.append(xform)
return transforms
def replace_block_instances(old_block_name, new_block_name):
"""Replace instances of a block with instances of a new block."""
transforms = get_block_instances_and_transforms(old_block_name)
for transform in transforms:
rs.InsertBlock(new_block_name, transform)
The error I am getting is:
Message: Could not convert R0=(1.40962254135957E-06,-1.32118725776672,0,-6625.6318359375), R1=(0,0,2.63138914108276,1600.00036621094), R2=(-3.94159054756165,-4.72493383085748E-07,0,8854.2724609375), R3=(0,0,0,1) to a Point3d
What am I missing?
