Rhino & Grasshopper Introduction

Reference files on the filer server:

/Volumes/DDE/BDE_VIAD-MATERIAL/01_VORLESUNGEN & PROJEKTE/17HS/Sem5_EmbodiedFabrication/RhinoAndGrasshopperSampleFiles

Geometry - basic building blocks

Boundary representation (BREP)

Rhino Interface

Open

Setup:

• Turn on Point Snap (End, Midpoint, Center, Intersection, Perpendicular, Quadrant) & Grid Snap

• Turn on Gumball

• Turn on shading for the perspective window (shaded or ghosted)
  
  

• Tip: Enter or Space to enter commands

First Steps in Rhino

What	How	Visual Aid

What	How	Visual Aid
navigating	Pan (two finger swipe/right mouseclick + Shift - also Control + Shift + click and drag) Zoom (pinch) Rotate View (two finger swipe/right mouseclick - also Control + click and drag
selection	depending how you drag your selection window either everything touched by the selection window is selected (bottom right to top left) or only objects that are fully enclosed by the window are selected (top lect to bottom right)
create geometry	_line _curve _circle _arc _rectangle	Open
edit 2D	_move _copy _rotate _scale _dir (flip direction) _array	Open
	_join _eplode _trim _split _group _ungroup _extend _mirror	Open
edit with gumball	Turn on control points Turn on gumball select control points or geometry and use handles to move, rotate or scale extrude: drag move handle then hold Command to select contour: Command + Shift + select contour	Open Open Open
create 3D geometry	primitives: _pipe _box _sphere _cylinder operations: _sweep _loft _rail _revolve _extrude	Open
boolean operations	_BooleanUnion _BooleanDifference _BooleanIntersection	Open
use a reference image	_BackgroundBitmap

First Steps in Grasshopper

Great introduciton to Grasshopper: http://grasshopperprimer.com/

Exercise 01 - Rhino: draw line and revolve

Open

Open

Commands:

• draw line; turning on gridsnap makes things easier

• join the line, if it is not a joined line already

• use _fillet to create the round inner edge

• revolve countour to create a 

Exercise 2 - Rhino: transform and extrude, using gumball

Open

Grasshopper - the parametric glass

Premise: design a definition to control height, top&bottom radius and wall thickness through sliders.

Open

1. set basepoint in rhino and connect to grasshopper

2. create sliders for heith, top&bottom radius and wall thickness

3. move (copy) the centerpoints for the all circles but the lower outer radius

4. subtract the wallthickness for the inner circles

5. create a loft (mind the order)
   loft type (O) set to "straigt"

6. create the bottom inner and outer surface with "boundary surface"

7. join all surfaces

8. "bake"

Grasshopper - working with attractors

Premise: Control the diameter of circles by the proximity to an object

Open

1.  Create a "rectangular" grid

2. control Size and Extend through sliders

3. create circles on the intersetion points (p)

4. control the radius of the circles through the distance to a point set in rhino
   use a division or mapping to adjust the scale

Grasshopper - deconstruct a mesh

Open

1. connect a mesh from rhino

2. "deconstruct mesh"

3. "deconstruct face"

4. read out the edges through "list items"