diff options
Diffstat (limited to 'src/language.ts')
| -rw-r--r-- | src/language.ts | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/src/language.ts b/src/language.ts index c0360b8..dd96b8d 100644 --- a/src/language.ts +++ b/src/language.ts @@ -20,6 +20,36 @@ export interface VowelFeatures { nasal: boolean; } + +// convert a vowel height/depth combo to an x/y position +// (for use in creating nicely spaced vowel inventories) +export function _vowelXY( + height: VowelHeight, + depth: VowelDepth +): [number, number] { + const y = { + [VowelHeight.Open]: 0, + [VowelHeight.NearOpen]: 1, + [VowelHeight.OpenMid]: 2, + [VowelHeight.Mid]: 3, + [VowelHeight.CloseMid]: 4, + [VowelHeight.NearClose]: 5, + [VowelHeight.Close]: 6, + }[height]; + + const slope = { + [VowelDepth.Front]: 1, + [VowelDepth.Central]: 2, + [VowelDepth.Back]: 3, + }[depth]; + + if (slope === 3) { return [ 0, y ]; } + + const x = (y + 2) / slope; + return [x, y]; +} + + // convert a set of vowel features to an IPA representation export function vowelFeaturesToIpa(features: VowelFeatures): string { const ipa = () => { @@ -141,6 +171,8 @@ export interface ConsonantFeatures { } +// convert a set of consonant features to IPA +// returns the empty string if the proposed consonant does not exist export function consonantFeaturesToIpa(features: ConsonantFeatures): string { switch (features.place) { case ConsonantPlace.Bilabial: |