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Intro to Grasshopper 01 | Introduction
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All right. So, welcome to the
introduction to parametric design with
Grasshopper. This webinar will introduce
you guys to the fundamental concepts and
essential skills necessary for
effectively designing with Grasshopper
for Rhinoceros 3D. We'll cover concepts
such as object attributes and
parameters, data
types, data structures, and designing
and thinking with algorithms.
We'll be sure to leave plenty of time
during the webinar to discuss some of
the points um that are a little more
interesting about recent updates to
Grasshopper 9 as well as um be able to
answer any questions um that you guys
might have come up as we move
along. So some of the topics again that
we'll cover is what is parametric design
and when is it useful? So what are those
fundamental concepts and essential
skills necessary to know what's an
algorithm and how can I use one to
explore my ideas? So divi defining as
well as executing parametric design
solutions and the path to success. How
do we store and access data? Working
with lists and data
trees. And now what? Using Grasshopper
in my creative workflow, file layout,
organization, and how to get the most
modularity. Like to give a special thank
you um to McNeel and Associates for
their sponsorship of this free event. Be
sure to check out their website um up at
rhino3d.com. I'm Ronnie Parsons and with
me today is Gil Akos and we are studio
mode. We are a
multiddisciplinary design practice based
in Brooklyn, New
York that consists of um three
interrelated sub entities open, lateral
and design. Open is uh what this
initiative is all about. It's a shares
source kind of initiative consisting of
a web repository for the creative use of
design technology. A series of monthly
webinars as well as bimonthly workshops
which are hosted here in our
studio. Lateral
um is a is a a service which offers
laser and knife CNC cutting services in
addition to design consultation and
bespoke parametric tool creation. who
really try to help u various types of
artists, designers, architects, etc. uh
make their ideas into a reality. And
design is really uh just that. It's our
own design um work. And at the top
right, you can see studio mode. Is the
page. So this is uh Model Lab. Um, and
here you can see a couple of recent
workshops that we did um at our studio
here in uh Greenpoint, Brooklyn, the
patterning lab as well as the nonlinear
lab with um Skyler Tibbitz, guest
instructor. And be sure to uh connect
facebook.comstudio.mmodelab. If you'd
like to uh give us a thumbs up or post a
couple of comments, we'd be more than
happy to uh uh reply back to you.
So a couple of issues regarding the uh
webinar administration
uh specifically infrastructure regarding
the webinar is we will be recording and
distributing this webinar later as a
series of shorter videos for you uh to
be able to come back to and reference in
the future as well as the PDF document
that we'll be using during today's
session will be shared um in the coming
month as a reference uh for you all. You
should have received an email with a
link to the webinar source files. These
files are for your reference. We will be
using them today. Um, but we will be
building all of the files from
scratch. Both Gil and I are connect are
conducting the webinar simultaneously.
So I will be presenting and Gil will be
answering technical questions on the fly
and redirecting any relevant topical
questions for me to address to the group
um as we see multiple people asking the
same question. So the idea here is that
we really want to provide a live
experience for you um as an an attendee
and uh kind of make it seem more like a
webinar. So
Grasshopper Grasshopper is a nodebased
algorithm editor integrated with Rhino
3D's modeling tools.
What it allows you to do is to define
logical relationships between multiple
design parameters that define a
parametric model. Here at the bottom
right, you can see in icon format what
that kind of parametric model might look
like. A couple of nodes connected to
another object using something which we
Now a parametric model then is really a
model wherein the parts of a design
relate and change in a coordinated way
as as defined by the various parameters
This is kind of the typical parametric
uh model where you might see a couple of
shapes connected to form a loft and then
sections for instance to be able to
represent that parametric relationship
in a slightly different
way. Now if we bounce over to
Rhino, one of the first things you're
going to need to do is type in Grasshopper.
When you do that, Grasshopper will
open. And down here at the bottom,
you'll want to double check that you are
9.0012. You can also get to that by
going to help and
Now, back to parametric modeling for a
moment. When we're talking about a
parametric model, what we're really
talking about are parameters. And in the
most general sense, a parameter is a
factor that helps to define the overall
system. Here we can see two instances or
states of a parametric model where the
differing shapes are really a byproduct
of changes in the parameters which
define the overall
form. You might notice some of the
values are rendered here in green or red
rather and blue showing which are
actually shared across multiple inputs.
A change for instance to the value in
R1 would result in a very different kind
of effect when the circle scales up
edges. You zoom in a little bit closer.
You might be able to see that there are
a few more relationships here or
something called constraints that are
really important to the way in which
this model is constructed. For instance,
you may notice that there's a 120 degree
angular constraint which is governing
where the major uh axes for geometry
model. So working
parametrically is a very interesting way
to begin to think about design.
One of the things that is really
important to understand as we begin to
move into a parametric modeling
environment is how to understand how data
data
flows. Now, when we're creating things
in a parametric environment, we're not
only defining objects as geometry, but
also as data. So we'll be sure to focus
on how that works and how you can begin
to tackle design processes by thinking
through how the data might flow in the
model. A second issue to think about as
we begin to move into a parametric
environment is that any problem can
really be broken down into a series of
very manageable parts. So, we're going
to have to think before we even start
how to divide our problem into a series
of parts that we can begin to execute
step by
step. Working parametrically also
requires you to begin to think a little
bit more abstractly about
things as well as beginning to think
mathematically. And lastly, to begin to
think about design through an
algorithmic approach. Here at the bottom
left you can see something which is
referred to as a driver diagram. It's
also referred to as a law curve diagram.
But essentially what it is is a
two-dimensional drawing which represents
the various types of geometrical
constraints in place in a parametric
model. To the right you'll notice that
there are a series of variations on what
the output of this parametric model
might be.
Each one of those states as they're
referred to as is really a byproduct of
just a change in the diagram that we see
left. So thinking
algorithmically well let's talk about an
algorithm for a moment. Now an algorithm
is really just a set of rules that
precisely defines a sequence of operations.
operations. For
For
instance, as we're beginning to develop
something like a law curve diagram or a driver
driver
diagram here, we might think about what
are the various steps that we might need
to take in order to be able to draw the
ultimate outline curve that we see
As we begin to take the next step and
think about how that curve might be
displaced in Z, we might have another
rule that defines what parameters
change. Those changes are reflected here
in the lofted surface and then in the
contoured floor plate model that we see
So a few things to remember that are
really critical to parametric design is
that the parameters of a particular
design are what are being declared not its
its
shape. Now that's a pretty big
difference between the way in which more
traditional modes of design development
might occur. For instance, in your
sketchbook, you might begin to sketch
out what something might look like, right?
right?
But in a parametric model, the process
is very explicit. So not only what it
will look like is important, but what
are the relationships that govern what
it might look like. Now, because the
process is explicit, you really have to
have an idea about where you're going as
well as how you might get there before
you even begin modeling. So having a
very good understanding and a strong
foundation in what the various parts of
an object like
geometry might be will afford you a lot
more possibilities before you begin to
parametrically or uh before you begin to
parametric model. So for instance
understanding how a curve like a circle is
is
constructed will ensure that you know
how to begin to draw the circle once
Now the various inputs
processing as well as the desired
results in this planning process are
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