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arkonandClaude Opus 4.8
09a142d14b
Bring the Ark0N/codeman-gesture-control repo in-tree as the codeman-gesture-control workspace package so the hand-tracking overlay can be developed in the Codeman repo. New npm run build:gesture bundles src/codeman/entry.ts into the served gesture-codeman.js; scripts/build.mjs reruns it on every production build. Source formatted to Codeman's prettier style. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
79 lines
1.6 KiB
TypeScript
79 lines
1.6 KiB
TypeScript
// MediaPipe hand landmark indices and the bone connections between them.
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// See: https://developers.google.com/mediapipe/solutions/vision/hand_landmarker
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//
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// 21 landmarks per hand, each normalized to [0,1] in image space.
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export const LANDMARK = {
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WRIST: 0,
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THUMB_CMC: 1,
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THUMB_MCP: 2,
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THUMB_IP: 3,
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THUMB_TIP: 4,
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INDEX_MCP: 5,
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INDEX_PIP: 6,
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INDEX_DIP: 7,
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INDEX_TIP: 8,
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MIDDLE_MCP: 9,
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MIDDLE_PIP: 10,
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MIDDLE_DIP: 11,
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MIDDLE_TIP: 12,
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RING_MCP: 13,
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RING_PIP: 14,
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RING_DIP: 15,
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RING_TIP: 16,
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PINKY_MCP: 17,
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PINKY_PIP: 18,
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PINKY_DIP: 19,
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PINKY_TIP: 20,
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} as const;
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/** Pairs of landmark indices that form the hand skeleton, for overlay drawing. */
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export const HAND_CONNECTIONS: ReadonlyArray<readonly [number, number]> = [
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// Thumb
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[0, 1],
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[1, 2],
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[2, 3],
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[3, 4],
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// Index
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[0, 5],
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[5, 6],
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[6, 7],
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[7, 8],
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// Middle
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[5, 9],
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[9, 10],
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[10, 11],
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[11, 12],
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// Ring
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[9, 13],
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[13, 14],
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[14, 15],
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[15, 16],
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// Pinky
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[13, 17],
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[17, 18],
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[18, 19],
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[19, 20],
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// Palm base
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[0, 17],
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];
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export interface NormalizedLandmark {
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x: number;
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y: number;
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z: number;
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visibility?: number;
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}
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/** Euclidean distance between two normalized landmarks (x/y plane). */
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export function dist2d(a: NormalizedLandmark, b: NormalizedLandmark): number {
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const dx = a.x - b.x;
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const dy = a.y - b.y;
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return Math.hypot(dx, dy);
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}
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/** Midpoint of two normalized landmarks (x/y plane). */
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export function midpoint(a: NormalizedLandmark, b: NormalizedLandmark): { x: number; y: number } {
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return { x: (a.x + b.x) / 2, y: (a.y + b.y) / 2 };
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}
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