feat(geom-trace-bitmap): add TraceOpts.max

Author: postspectacular

packages/geom-trace-bitmap/src/api.ts

@@ -18,11 +18,17 @@ export interface TraceOpts {
 	 */
 	select: Predicate<number>;
 	/**
-	 * Minimum length of line segments (in pixels).
+	 * Minimum length of line segments (in consecutive pixels).
 	 *
 	 * @defaultValue 2
 	 */
 	min?: number;
+	/**
+	 * Maximum length of line segments (in consecutive pixels).
+	 *
+	 * @defaultValue Infinity
+	 */
+	max?: number;
 	/**
 	 * Clear value to replace extracted pixels with.
 	 *

packages/geom-trace-bitmap/src/trace.ts

@@ -105,10 +105,11 @@ export const traceLines = (
 	tx: PointTransform,
 	acc: VecPair[] = []
 ) => {
-	let { img, select, clear, last, min } = {
+	let { img, select, clear, last, min, max } = {
 		clear: 0,
 		last: true,
 		min: 2,
+		max: Infinity,
 		...opts,
 	};
 	min--;
@@ -123,7 +124,7 @@ export const traceLines = (
 		const isBorder = border(p);
 		const n = curr.length;
 		if (c) {
-			if (isBorder) {
+			if (isBorder || n >= max) {
 				if (n > 0) {
 					if (prevBorder) {
 						if (n > min) $record();