garment-cut

A garment cut out of the body: draw a polygon over the front view (a rectangle from the waist to the ankles is a pair of trousers), and the skin inside it, front and back, is cut out along the outline, pushed out by a thickness, and given a hem. The result is an ordinary proxy binding, so it fits every body shape and bends with every clip exactly as MakeHuman's clothes do (proxy-fit).

• The outline is a prism through the body: everything inside the polygon in the front view, front and back. An optional side-view outline is intersected with it (a garment that stops short of the back, a bib).
• Several polygons are one garment (their union): two gloves, or a top and its sleeves drawn separately.
• The skin is cut along the outline, not at the nearest triangle edge, so a hem is a straight line, and neighbouring triangles share their cut points, so the hem has no cracks.
• A cut that goes round a limb (a sleeve, a trouser leg) is square to the limb, wherever the outline's line crosses it; a cut round the body (a waist, a hem) follows the line. A neckline drawn level is cut a little lower in front than behind (15°), as most are; a V or a scoop is cut as drawn.
• thickness pushes the cloth out along the body's normals; ease relaxes it across creases (between the legs, under the buttocks), so cloth bridges a hollow instead of following the skin into it.
• A hem joins the outer surface back to the skin, so a cut edge reads as cloth with a thickness rather than a paper shell.
• delete lists the body vertices the garment covers (for coverBody).

skirtGarment takes the same outlines and makes a skirt, kilt or robe instead: at each height, the cloth goes round the CONVEX outline of the body inside the cut (both legs as one, or the torso and arms), so it spans the gaps instead of following each leg. Below its widest ring it hangs straight down. It is an open tube, no top or bottom, to be drawn two-sided. It is for the torso and legs: skirts, kilts, robes. Each point is bound between the nearest skin on the left and on the right, blended across the middle, so it moves with both legs and tears between neither. anchor says which skin a skirt may go round; the builder leaves out the arms (a skirt cannot follow a swinging arm without cloth simulation), so a robe drawn over the arms is a skirt over the body and its sleeves a cut.

Pure: positions and triangles in, a binding out.