What this tutorial is about and thank you notes
In this tutorial you will learn how to use the pattern-making software Seamly2D to create a pattern for a shirt. I focus on the usage of Seamly2D; I assume that you already know how to make and alter patterns on paper and how to use the PC generally. Still, this tutorial is no manual that says “this button does this” and “that button is used for that”; only the buttons we need to create our shirt are explained. A manual you can find here: List of Manuals on Seamly2D-Wiki
The tutorial is made with software version 0.6.0 of Seamly2D. There might be differences if you use a different version. Please be aware that you can upgrade and use your files, but if you downgrade the files maybe won't work because the older version of the program doesn't know the new features you used.
Please also be aware that this tutorial comes with absolutely no warranty and is provided as is. The pattern is made by myself and not with focus on fitting very well, but on being easy to draw, because in this tutorial we really want to concentrate on the use of the software, not on good construction of a shirt :)
You can create patterns in Seamly2D with all kinds of construction systems. Seamly2D is like your ruler, circle, eraser, calculator, and paper, just on your PC. For the tutorial I'd suggest that you stick with the construction that I did, just to learn how to deal with Seamly2D; later on you can easily transfer it to your system. For the names of the measurements I took the ones Seamly provides. If you alter measurements because you don't like the ones of Mme. Skirt, you might have to smooth the curves again.
Requirements[edit | edit source]
- Seamly2D installed and working on your PC
- Knowledge of pattern making
- Knowledge of basic skills on using a PC
- Paper and printer if you want to print the pattern
The very first steps in Seamly2D[edit | edit source]
The start screen[edit | edit source]
When you open Seamly2D, your screen will look like the picture on the right:
After you click on the “New” button (in the left upper edge, marked red), a popup will appear:
After you have typed in the name and confirmed with ok, the screen will have changed a little bit:
Drawing our first lines – the reference square[edit | edit source]
As printers and plotters sometimes do funny things, I put a reference square in every pattern I want to print. If you sell patterns or have someone else print them I think it is also a good habit to print out the reference square, just to make sure the pattern is printed right.
When you click the button, the cursor on the workspace will change to a black dart with the symbol of the tool at the side. You click on the first point, A, then go to the side where the line should go, just a little way. Then you click again and a pop-up-window will appear where you can fill in the length of the line and an angle. For the reference square we want the line go straight to the right for 10 cm, so we fill in “10” for length and “0” for angle. If you press “shift” while moving the cursor the angle will snap to 0° if you move right, and to every additional 45° as you proceed counter-clockwise, (like an eight-point compass.)
For the fourth line you can use the “line between points”-tool, found under the "Line" tab on the left toolbar. Click on the two points between which you would like to see a line, here A1 and A3:
Btw, now is a really good time to save for the first time. I called my file “Tutorial_Shirt”.
Measurements and Variables[edit | edit source]
Before you draw your actual pattern, it is a good idea to feed Seamly2D with the measurements you need. Theoretically you could draw the lines and put the number in every time. As you use some of the measurements and other numbers over and over again, that wouldn't be a good idea, though. So we work with measurements and variables.
Measurements are the numbers you took while you measured your customer, like waist circumference or hip depth. Seamly2D has a helping program called “SeamlyMe” where you will store all the measurements. You call it from inside Seamly2D with
“Measurements → Open SeamlyMe”
You will have to create a new file the first time you make a pattern, with the button “New” in the left upper edge of the popped-up SeamlyMe-window. A second window will pop up, asking you for the measurement type and unit.
We'll just keep it as it is on individual and centimeters and confirm with “ok”.
The SeamlyMe-window will change a little bit, so that you can add custom measurements with the orange or the red plus-sign “add custom” or “add known”.
For every measurement you click one of the plus-signs, fill in the fields (just write, no “enter”) and then add the next measurement. Seamly2D has a lot of measurements already defined and explained, so that you only need to click on the red plus-sign, choose your measurement in the pop-up window and confirm with enter and then enter the pertinent number in the field “formula”. If there is a measurement that Seamly2D doesn't have pre-filled yet, you use the orange plus-sign and fill-in all the blanks yourself.
Here I have filled in four measurements: Body Height, (not actually used for the shirt, but planning for the future,) waist and hip circumferences, and hip depth. (Don't worry about waist, we won't need it in this pattern; our nice customer Modellina Skirt just wants other garments, too.)
Name is a short name to work with in formulas, formula in this case is the actual measurement, full name is a human-understandable name, so that you don't get lost in cryptic letters and in description you can give further explanations, like “Distance from waist to hip” or “front length, measured from 7. vertebra”.
After you have filled in all the measurements, you must save the SeamlyMe file. If you change something in the SeamlyMe file later on while working on a pattern, Seamly2D will take the new measurements, (you will be asked whether you'd like to synchronize, say “yes” then), but only if you save the file. I called my file “Modellina_Skirt.vit”
Variables, or increments, are placeholders for numbers and formulas that you need. Some of those things you need more than once, in different places, for example added ease to hip circumference – the measured hip circumference plus ease makes hip width. I is a good habit not to type the number or formula in every time you need it but to define variables. That way, if you change a number, for example the ease, you only have to do it at one place. Seamly2D will take care of all changes throughout the pattern. This way you won't miss places where the figure needs to be changed.
For the shirt we will need to fill in the following measurements and variables:
|garm_length||Length of garment from 7. vertebra to seam||70|
|ease_hip||Ease at hip||5|
|ease_bust||Ease at bust||7|
|hip_width||Hip circumference plus ease||hip_circ+#ease_hip|
|bust_width||Bust circumference plus ease||bust_circ+#ease_bust|
|neck_width||width of neck (radius)||neck_circ/(2*_pi)+1,5|
|shoulder_length||length of shoulder from neck||11,8|
|neck_back_to_highbust_b (in back)||20|
Be aware that Seamly2D measures in centimeters (cm) by default, so if there is a pattern with measurements in millimeter (mm), you need to divide those by 10.
After we have filled in all the measurements and variables it is a really good time to save your pattern again.
Now we can go to the next step – the frame. For this we make a new pattern piece.
The first real pattern piece - the shirt back[edit | edit source]
There is some confusion about the names in Seamly2D at the moment. What I would call “pattern piece” is there called “detail.” It consists of the pattern piece including all the details you don't add at drawing, like seamlines, labels, notches and so on. In one “pattern piece” can be multiple “details,” like back and front of a shirt. So it's kind of like "detailing" a new car?
Building the frame and our first curves[edit | edit source]
The frame starts out pretty much as you did with the reference square. There are more than one ways to accomplish this task, so don't worry if yours is different from mine. My way in the tutorial was:
- Putting B into a convenient place: x = 60, y = 2 as we work from right to left
- Point at a distance from B down, length #garm_length => B1
- Mark bust line with point at a distance along line, length neck_back_to_highbust_b => B2
- Point along perpendicular at B1 to the left, length hip_width/4 => B3
- Point along perpendicular at B2 to the left, length bust_width/5,5 => B4
We go on making some more lines to help us:
Point along perpendicular at B to the left, length neck_circ/6+1 => B5
- Point along perpendicular at B5 up, length 2 => B6
- Simple curve between B6 and B
For the curve we find a button to the left. We have to connect B5 and B like we did for the line. As we want to have a nice curve on the t-shirt, the angle at B needs to be 90° to the middle of the back (our line B to B1), so at “C2” for the angle we fill in 180°. Length here is 1.
B6 makes “C1”, the starting point of the curve. It gets a degree of 290° and a length of 4. (Hint: there is a more elegant way to form the curve if you want to grade pattern. It includes some math, so we might perhaps do it in a later tutorial or if you are too curious now, you just may take a look at Keith's tutorial about the Kolson-Method in Seamly2Ds wiki: The_Kolson_Method. For now the plain numbers are sufficient).
There are also some little handles, in the beginning hidden in the purple circles. You see them as little red circles in the picture. You could grab and move them with the mouse, but it is easier and more precise to fill in the angle and length in the fields at the right.
This curve is our first line for our basic shirt, so I left it black. It will become the neck.
The second line will be
- Point at distance and angle from B6, length shoulder_length, angle 200° => B7
This is our shoulder. For the armhole we need a bit more framing:
- Point of x and y of two other points with B4, B, => B8
- Point at a Distance along line B4, B8, length CurrentLength/4 => B9
- Point along perpendicular in B9 to the right, 1 cm => B10
- Point of x and y of two other points with B3, B2 => B11
Now we have our points together for the armhole. This is made with the “curved path”-tool. Our nodes, or control points as Seamly2D are B7, B10 and B11 – click them, when you are done press “enter”. To edit the curve right-click on the curve now and select “options”. There you can fill in the angles and lengths, select each point and put the numbers in the field appearing on the left. It is
B7: length 8, angle 290 for the second control point
B10: length 2, angle 60 for first, length 5, angle 240 for the second controlpoint
B11: length 2,75, angle 0 for the first control point.
The first details – reference and back[edit | edit source]
It is time to make the first details. You select the “detail”-tool (also called “workpiece-tool”) and click all the points and curves you want to have in your
pattern piece – ehem, detail. You musst do that clockwise, else Seamly2D will be unhappy an the detail won't work. Also, if a curve has the arrows converse to the direction you are choosing the nodes it won't work. Press “shift” in that case, that will reverse the curve. After you have selected all points and curves, press “enter”. Don't press the first point you choose a second time, stop on the curve or point previous to the first choosen point.
I wanted so see B10 because I'll need it later on. But if you choose a point on a curve, you have to choose the curve again, else Seamly2D will only take the part before the curve.
If you succeed the window with the path will pop up. Right now you can only press ok (and pat yourself on the shoulder, you've done a lot of work!)
Oh, and just for practicing – make a detail out of the reference square, please :) If the square is grayed out and you can't click on it, choose it in the pull-down-menu of the pattern-pieces.
When you've done that, you can go to the details-mode. The screen should look like this then:
We should label the pieces and maybe give them a seamline.
I grew up with ready-made patterns without seamline, but I got used to it very, very fast since I use Seamly2D.
And label is mandatory – else you don't know what you thought when you use your pattern in ten years again :)
Labeling the Reference square[edit | edit source]
I called the reference square “Reference” and filled that in in “Name of Detail”. In Annotation I filled in “10 cm per side”; you will see the use in an Instant. Quantity is on 1 per default; we don't need it here and just leave it as it is. The other fields we don't need right now as well.
The nice thing on a program is, that there are a lot of things we only need to do once. We can save our template for future use with the little floppy-symbol in the right upper edge. As my labels on every pattern look pretty much the same, this comes in really handy.
Stay tuned, there is still the seamline to come. And we also need to finish our T-Shirt...
- SeamlyMe and Seamly2D take care of the suffix, you don't need to type them. Measurements are “vit” and pattern is “val”