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freesewing/markdown/dev/tutorials/pattern-design/shaping-the-straps/en.md
Joost De Cock b34a2ee2ed feat: Flat import of markdown repo
This is a flat (without history) import of (some of) the content
from our markdown module.

We've imported this without history because the repo contains our
blog posts and showcases posts content prior to porting them to strapi.

Since this contains many images, it would balloon the size of this repo
to import the full history.

Instead, please refer to the history of the (archived) markdown repo
at: https://github.com/freesewing/markdown
2021-08-25 16:09:31 +02:00

1.5 KiB

title order
Shaping the straps 200

Our straps should follow the neck opening, which isn't that hard to do. We just need to keep the control points of our curves at similar proportions. Which means, halfway between the start of the curve, and the corner of our rectangle.

For this, you'll be using a new method: Point.shiftFractionTowards(). We've already used Point.shift() and there's also Point.shiftTowards() and Point.shiftOutwards(). As always, the API docs have all the details.

points.edgeLeft = new Point(points.topLeft.x, points.left.y);
points.edgeRight = new Point(points.topRight.x, points.right.y);
points.edgeTop = new Point(0, points.topLeft.y);

points.edgeLeftCp = points.edgeLeft.shiftFractionTowards(points.topLeft, 0.5);
points.edgeRightCp = points.edgeLeftCp.flipX();
points.edgeTopLeftCp = points.edgeTop.shiftFractionTowards(
  points.topLeft,
  0.5
);
points.edgeTopRightCp = points.edgeTopLeftCp.flipX();

Now, adapt our rect path so it's no longer a rectangle:

paths.rect = new Path()
  .move(points.edgeTop)
  .curve(points.edgeTopLeftCp, points.edgeLeftCp, points.edgeLeft)
  .line(points.bottomLeft)
  .line(points.bottomRight)
  .line(points.edgeRight)
  .curve(points.edgeRightCp, points.edgeTopRightCp, points.edgeTop)
  .close();

All of a sudden, things are starting to look like a bib: