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Reference files on the filer server:

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A great reference for Rhino 3D can be found here: https://www.rhino3d.com/tutorials

Geometry - basic building blocks

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Rhino Interface

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
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
edit 2D	_move _copy _rotate _scale _dir (flip direction) _array
	_join _eplodeexplode _trim _split _group _ungroup _extend _mirror
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
create 3D geometry	primitives: _pipe _box _sphere _cylinder operations: _sweep _loft _rail _revolve _extrude -
boolean operations	_BooleanUnion _BooleanDifference _BooleanIntersection
use a reference image	_BackgroundBitmap

First Steps in Grasshopper

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

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Exercise: 2D

Attempt to recreate the form in this technical drawing to scale. 

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image source: https://blog.draftsperson.net/metric-dimensioning-guide

Exercise: Extrude and Boolean

Make a simple house using a combination of the 2D drawing commands, extrude and boolean operations. Plan some abstracted details, like doors, windows and chimneys that could be added.

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Commands:

_extrude

_BooleanUnion
_BooleanDifference
_BooleanIntersection

Exercise: Revolve

Reproduce the 2D form, and revolve it into a 3D solid

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 contour to create a a 3d solid

Exercise

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: Gumball 

Transform and extrude

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a 2D form using the gumball tool.

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Grasshopper - the parametric glass

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

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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

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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

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Tip: holding command (windows ctrl) after dragging an arrow will extrude in that axis. 

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Exercise: Advanved 

Reproduce the form from this technical diagram.

Commands:

• Offset to offset the boundary of a curve 
• Split and Trim to edit lines, curves and polylines
• Object snap tangent to draw a line from a curve edge
• Extrude to create 3D geometry from 2D
• SrfPt to create a non-planar surfaces 
• Split to cut a solid with a surface or curve 
• Boolean Union to combine all geometry
• MergeAllFaces to clean up surfaces

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