Cleave

What it can come out as

How each one is actually drawn - region by region, and the layers it is built from - is on the coding tab.

Crossing two of them

Finding one

About 1 in 2,083 wild horses is born showing this. That is the whole of the supply: catch one, or make one with the carrot below. Breeds set their own pools and a breed built around this gene will carry it far more often than the wild population does.

Its gene carrot

The file

common/src/main/resources/horsegenetics/genes/cleave.json — a data-driven gene, not a Java class. It is listed in the index.json beside it and registered by Genes' class initialiser at startup.

Why it is built this way

Two loci, not one. Cleave used to carry four alleles that crossed two questions together - Clv and Clc for a front-half split, Wav and Wac for a back-half one - so 'the same marking in the other colour' and 'the same marking on the other half' were the same kind of thing, and every colour added had to be added twice. They are separate questions and they are separate genes now: this one says whether there is a cleave and what colour, horsegenetics.cleave_side says which half.

This locus is the one that decides whether anything is painted at all. A horse can carry Wve/Wve and show nothing, because the side gene has no layers of its own; Clvw/Clvw n/n is a white front half and Clvw/Clvw Wve/Wve is the same white marking on the back half.

The back-half expressions are listed BEFORE the front-half ones on purpose. SpecGene walks the conditional expressions in file order and only falls through to the plain combination table when none of them is satisfied, so the half that carries the 'needs' has to come first or it can never win.

The black allele is the white one with the light taken out of it, and it sits one rung under white in the dominance series. The re-toning is a mapping rather than a repaint: every achromatic target moves into the dark end of the scale keeping its order and its spacing, and every saturated one is left alone.

What it paints

Each outcome, described the way the gene file describes it, and then the layers that draw it in the order they are painted. The prose is the part a reader checks a bake against; the list underneath is what the engine actually did.

Cleave, back half

The horse is split across the barrel and it is the BACK half that carries the marking, teeth and all - the same split as the front form, reversed, because the horse carries Wve at the side locus.

1. the back half, and the straight-sided teeth it drives into the other — WAVES × WAVES × WAVES, painted with TOWARD
2. a half-opaque outline where the back half meets the coat — WAVES × WAVES × WAVES × WAVES × WAVES × WAVES, painted with TOWARD
3. detached spears floating clear of the line — SPOTS × AXIS, painted with TOWARD

Cleave, front half

The horse is split across the barrel and the FRONT half carries the marking, driven into the back half by straight-sided teeth, with a few spears floating clear of the line.

1. the front half, and the straight-sided teeth it drives into the other — WAVES × WAVES × WAVES, painted with TOWARD
2. a half-opaque outline where the front half meets the coat — WAVES × WAVES × WAVES × WAVES × WAVES × WAVES, painted with TOWARD
3. detached spears floating clear of the line — SPOTS × AXIS, painted with TOWARD

Black Cleave, back half

The horse is split across the barrel and it is the BACK half that carries the marking, teeth and all - the same split as the front form, reversed, because the horse carries Wve at the side locus.

1. the back half, and the straight-sided teeth it drives into the other — WAVES × WAVES × WAVES, painted with TOWARD
2. a half-opaque outline where the back half meets the coat — WAVES × WAVES × WAVES × WAVES × WAVES × WAVES, painted with TOWARD
3. detached spears floating clear of the line — SPOTS × AXIS, painted with TOWARD

Black Cleave, front half

The horse is split across the barrel and the FRONT half carries the marking, driven into the back half by straight-sided teeth, with a few spears floating clear of the line.

1. the front half, and the straight-sided teeth it drives into the other — WAVES × WAVES × WAVES, painted with TOWARD
2. a half-opaque outline where the front half meets the coat — WAVES × WAVES × WAVES × WAVES × WAVES × WAVES, painted with TOWARD
3. detached spears floating clear of the line — SPOTS × AXIS, painted with TOWARD

Coloured Cleave, back half

The horse is split across the barrel and it is the BACK half that carries the marking, teeth and all - the same split as the front form, reversed, because the horse carries Wve at the side locus.

1. the back half, and the straight-sided teeth it drives into the other, in colour — WAVES × WAVES × WAVES, painted with TOWARD
2. a half-opaque outline where the back half meets the coat, in colour — WAVES × WAVES × WAVES × WAVES × WAVES × WAVES, painted with TOWARD
3. detached spears floating clear of the line, in colour — SPOTS × AXIS, painted with TOWARD

Coloured Cleave, front half

The horse is split across the barrel and the FRONT half carries the marking, driven into the back half by straight-sided teeth, with a few spears floating clear of the line.

1. the front half, and the straight-sided teeth it drives into the other, in colour — WAVES × WAVES × WAVES, painted with TOWARD
2. a half-opaque outline where the front half meets the coat, in colour — WAVES × WAVES × WAVES × WAVES × WAVES × WAVES, painted with TOWARD
3. detached spears floating clear of the line, in colour — SPOTS × AXIS, painted with TOWARD

Wild type

No split.

Paints nothing.