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Rhino Tutorial: 2D Curve Basics

Approx Completion Time: 30 min
Goal: Learn many of the available 2D curve tools + Learn about Osnap

What you will draw:

Mac Instructions

Windows Instructions

Open Rhino and click Templates on the right (OR click File —> New Using Templates if Rhino is already open).

Open Rhino and click the New Tab at the top

Scroll down in the template menu and choose

Small Objects - Inches

Scroll down in the template menu and choose Small Objects - Inches

Let’s turn on a modeling aid.

Now you will see some information next to your cursor as you use most tools.

From the menu at the top, choose:

FILE > PROPERTIES

Under modeling aids select Cursor Tool Tips

Check the boxes above and click OK.

This entire tutorial will be created in TOP view.

Double click the word TOP to focus on that viewport.

Each tool has many variations. Click and hold on the rectangle tool on the left-hand tool palette

There are many ways to draw a rectangle. Later in this tutorial we’ll try:

 Rectangle: Corner to corner

 Rectangle: Center, corner

 Rectangle: Rounded rectangle

Other places to find the same tools: You can type in the command

or you can find them from them in the Curve menus at the top of the screen.

Before we start drawing, let’s talk about Osnap.  Osnap is short for Object Snap.

The Osnap menu allows you to choose from a list of ways that your cursor and shapes will snap together as you draw. You can select one or many as you draw.

   

Your Osnap panel is on the left (you can resize it by moving the bar at the top of the panel up and down).

Before we start drawing,let’s talk about Osnap.  Osnap is short for Object Snap.

The Osnap menu allows you to choose from a list of ways that your cursor and shapes will snap together as you draw. You can select one or many as you draw.

Your Osnap panel is at the bottom.

For now, let’s disable all Osnaps and enable Grid Snap (at the top of the screen)

Turn off all other buttons at the top of the window.

For now, let’s disable all Osnaps and enable Grid Snap (also at the bottom of the screen)

Turn off all other buttons at the bottom of the window.

Rectangle Choose:

Draw a 1” x 1” rectangle by clicking on the Origin point (x0, y0) 

and dragging to the first major grid line intersection (x1,y1).

Rectangle Choose:

Draw a 2nd 1” x 1” rectangle by clicking on typing in the coordinates.

You don’t need to type anywhere specific, just select the tool and type:

2.5,0.5 (This is the starting x,y CENTER coordinate of the box)

then 1 and ENTER (this is the width)

 finally 1 and ENTER (This is the height)

Rectangle Choose:

Let’s use the dragging method again: Draw your third rectangle from

x-point 4 and y-point 0 

to

x-point 5 and y-point 1

when you click to set the 2nd point,

you choose the radius for your rounded corners.

type 0.25 and hit enter

TIP: if you make a mistake in the middle of a tool, hit ESC

Now for some Circles.

Circle Choose:

This time, let’s key in the coordinates. After selecting the circle tool, type:

6.5, 0.5 and press ENTER

Then set the RADIUS to 0.5. (make sure diameter is not selected!)

Circle Choose:

Draw your circle using the dragging method from

x-point 8 and y-point 0.5

to

x-point 9 and y-point 0.5

Now for some Ellipses:

Choose:

This time, let’s key in the coordinates.

After selecting the ellipse tool, type: 11, 0.5  and ENTER

1st Axis = 0.5 and ENTER then click (with the mouse) directly above the ellipse’s center

2nd Axis = 1 and ENTER then click (with the mouse) directly to the left the ellipse’s center

Ellipse Choose:

Draw your ellipse from

x-point 12 and y-point 2.5 to

x-point 10 and y-point 2.5

drag height to

x-point 11 and y-point 3

 

Arcs are next

Arc Choose:

Draw your arc from

x-point 8 and y-point 2 to

x-point 9 and y-point 2

and drag arc up to 90 degrees.

 

Arc Choose:

Draw your arc from

x-point 6 and y-point 2 to

x-point 7 and y-point 2

and drag arc straight up

final point is at x-point 6.5 and y-point 3

Now for some polygons:

Polygon Choose:

Set this parameter on the left:

Draw your polygon from

x-point 4.5 and y-point 2.5

and drag straight up 

final click is at x-point 4.5 and y-point 3

Now for some polygons:

Polygon Choose:

Set this parameter in the command line.

Here we see 5 but you should enter 8.

Draw your polygon from

x-point 4.5 and y-point 2.5

and drag straight up 

final click is at x-point 4.5 and y-point 3

Polygon Choose:

Set this parameter on the left:

Draw your polygon from

x-point 2.5 and y-point 2.5

drag straight up 

click at x-point 2.5 and y-point 3

drag straight down 

final click is at x-point 2.5 and y-point 2.75

Polygon Choose:

Set this parameter in the command line.

Here we see 5 but you should enter 8.

Draw your polygon from

x-point 2.5 and y-point 2.5

drag straight up 

click at x-point 2.5 and y-point 3

drag straight down 

final click is at x-point 2.5 and y-point 2.75

Polygon Choose:

Key in coordinates for a polygon from

First Point: 0.5,1.75  and ENTER

drag to make a diamond with the next click at

Second Point: 1.25,2.5 and ENTER

Hold Command and Shift + Press E

Here’s what you have so far….right?

Hold CTRL and Shift + Press E

Here’s what you have so far….right?

Next is Polyline:

Draw your polyline (you can draw by dragging or keying in the coordinates)

x-point 0 and y-point 4 to

x-point 1 and y-point 5 to

x-point 2 and y-point 4 to

x-point 3 and y-point 5 to

x-point 4 and y-point 4 to

hit enter to end the line

Now for some Control Point Curves:

Choose:

Set the degree parameter on the left (at top on Windows).

This affects the line’s curvature.

Draw your curve by dragging or keying with ENTER between each xy set:

x-point, y-point (5,4)  to x-point,y-point (6,5) to

X-point, y-point (7,4) to x-point, y-point (8,5) to

X-point, y-point (9,4) and hit enter to end the curve

Control Point Curves Choose:

Draw your curve from:

x-point 10 and y-point 4 

drag handle right to 10.5 and y-point 4 click

2nd click: x-point 11 and y-point 5 

drag handle right to 12 and y-point 5 click

3nd click: x-point 12 and y-point 4 

drag handle right to 12.5 and y-point 4 click

hit enter to end the curve

TIP: Press Command Z if you mess up a point.

Control Point Curves  (handle curve) Choose:

Draw your curve from

x-point 10 and y-point 4 

drag handle right to 10.5 and y-point 4 click

2nd click: x-point 11 and y-point 5 

drag handle right to 12 and y-point 5 click

3nd click: x-point 12 and y-point 4 

drag handle right to 12.5 and y-point 4 click

hit enter to end the curve

TIP: Press Command Z if you mess up a point.

Control Point Curves Choose:

Draw your curve from

x-point 2 and y-point 9 to

2nd click: x-point 2 and y-point 6

3nd click: x-point 0 and y-point 6 

type 0.5 to set curvature hit enter to end the curve

To choose Conic again hit SPACEBAR (which repeats the most recent tool)

Draw by dragging your curve from

X-point, y-point (2,9) to

2nd point: x-point, y-point (2,6) 

3nd point: x-point, y-point (4,6) 

type 0.5 to set curvature hit enter to end the curve

 

Control Point Curves Flat Spiral

Draw your curve from

x-point 7 and y-point 7.5

First Radius: drag up to and click at x-point 7 and y-point 9

set this parameter on the left:

Second radius: x-point 7 and y-point 7.5

Control Point Curves Spiral

RIGHT CLICK ON THE TOOL

TO GET THE FLAT SPIRAL

Draw your curve from

x-point 7 and y-point 7.5

First Radius: drag up to and click at x-point 7 and y-point 9

set this parameter at the command line:

Second radius: x-point 7 and y-point 7.5

Points:

Choose:

Key in your points from

x-point, y-point (10,6) to

2nd point: x-point, y-point (12,6.5)

3nd point: x-point, y-point (10,7)

4th point: x-point, y-point (12,7.5)

5th point: x-point, y-point (10,8)

6th point: x-point, y-point (12,8.5)

7th point: x-point, y-point (10,9)  

hit enter to end points

Control Point Curves

Choose:

The degree parameter is still be set to 5 from the last time you used the tool.

Starting by clicking the lowest point and zig zagging up,

click one time on each point.

Hit enter when you reach the top.

Hold Command and Shift + Press E

Here’s what you have so far….right?

Hold CTRL and Shift + Press E

Here’s what you have so far….right?

Fillet:

Choose:

Set these parameters on the left:

Fillet top corner of the diamond

Click on the upper two sides of the diamond

one after another.

Fillet:

Choose:

Set the radius parameters at the command line

Here we see 0.4 but you should enter 0.5.

:

Fillet top corner of the diamond

Click on the upper two sides of the diamond

one after another.

Fillet: Chamfer

Set these parameters on the left:

Chamfer bottom corner of the diamond

Click on the lower two sides of the diamond.

Fillet: Chamfer

Set these parameters in the command line:

First Distance: 0.3

Second Distance: 0.3

Chamfer bottom corner of the diamond

Click on the lower two sides of the diamond.

Now we’ll make a few additions with the help of the Osnaps. In the lower left, UNCLICK disable all and select these Osnaps instead:

Now we’ll make a few additions with the help of the Osnaps. CLICK the Osnap button at the bottom

and select these Osnaps:

Rectangle Choose:

Now that the Osnaps are on, it will be easy to find the center of a rectangle.

Hover over the edge of the rectangle until you see the word center. Then click and draw

Drawing from the center of the 2nd rectangle you created,

turn the shape into 3 concentric rectangles like this (one inside the original and one outside):

Circle Choose:

Drawing from the MIDPOINT (of the line) of the 2nd circle you created and

dragging straight up, turn the shape into a venn diagram

Drawing from the curve END point of the same circle (right-hand side) and

 dragging straight up, add a third circle to the venn diagram.

 Osnaps are really handy when a point doesn’t fall on a grid intersection.

Using:

Create a triangle inside your control point curve.

Two of the corners of the triangle should line up with the midpoints of the curve.

Osnaps will even help you figure out where a fillet ends and a straight line starts.

Using:

Create a shape inside your filleted and chamfered diamond.

Have the shape intersect the points where the fillet ends.

Now lets put each row of shapes on its own layer. Select the layer panel on the right by clicking the icon below.

Now lets put each row of shapes on its own layer. Select the layer panel on the right by clicking the tab below.

Double click each layer name and rename as shown below:

Drag the cursor

around the bottom row to select all the shapes.

While the shapes are selected,

right-click (or control click) on Row 1 

in the layer palette.

Choose:

Drag the cursor

around the bottom row to select all the shapes.

While the shapes are selected,

right-click (or control click) on Row 1 

in the layer palette.

From the contextual menu choose:

Change Objects to Layer

Repeat this process and put each row of shapes on the corresponding layer.

The object will take on the preview color for the layer. This can be changed by double clicking the color box next to the layer name.  Pick whatever colors you like as long as they are easily visible and look good together : )

Your turn!

Now select the my shapes layer by clicking inside the radio button and highlighting the layer.

On this layer, create a face using at least four of the shapes you learned

Create whatever face you want out of the tools covered in this tutorial…..

….but you can’t copy this “WAKING UP TOO EARLY” face exactly!

Final touches:

Hold Command and Shift + Press E

Right-click anywhere on the viewport grid and choose:

In the option window, uncheck these properties:

Then, close the window

This will only affect this document, but will make the drawing easier to see.

Final touches:

Hold CTRL and Shift + Press E

Choose FILE>PROPERTIES

Then click on GRID

In the option window, uncheck these properties:

Then, close the window

This will only affect this document, but will make the drawing easier to see.

Is this what you have? (You will have a different face)

You’ve completed this tutorial!!! Save your file

as curvesYourName.3dm AND a screenshot as

curvesYourName.png and turn both in as specified by your instructor.

How to take a screenshot

MAC  WINDOWS

I have extra class time! What should I do???

  1. Does someone in the class need some assistance? Show them how you did some of this tutorial! But don’t take over their computer and do it for them. That’s not really teaching ; )

  1. The best way to internalize your learning is to apply what you know. Using some of the tools you learned, draw an abstract geometric landscape. You can do it on the same file (to the left of what you already have)

Some inspiration from the internet:

Credit: https://society6.com/product/geometric-landscape-14_print

Credit: https://www.pictorem.com/233788/Geometric%20Landscape.html