Merge branch 'trails-aubrey' of https://github.com/brown-dash/Dash-Web into trails-aubrey

1 files changed, 11 insertions, 0 deletions

diff --git a/src/fields/InkField.ts b/src/fields/InkField.ts
index f16e143d8..560cf3d63 100644
--- a/src/fields/InkField.ts
+++ b/src/fields/InkField.ts
@@ -3,6 +3,7 @@ import { Scripting } from "../client/util/Scripting";
 import { Deserializable } from "../client/util/SerializationHelper";
 import { Copy, ToScriptString, ToString } from "./FieldSymbols";
 import { ObjectField } from "./ObjectField";
+import { Bezier } from "bezier-js";
 
 // Helps keep track of the current ink tool in use.
 export enum InkTool {
@@ -20,6 +21,8 @@ export interface PointData {
     Y: number;
 }
 
+export type Segment = Array<Bezier>;
+
 // Defines an ink as an array of points.
 export type InkData = Array<PointData>;
 
@@ -67,6 +70,14 @@ export class InkField extends ObjectField {
         this.inkData = data;
     }
 
+    /**
+     * Extacts a simple segment from a compound Bezier curve
+     * @param segIndex the start index of the simple bezier segment to extact (eg., 0, 4, 8, ...)
+     */
+    public static Segment(inkData: InkData, segIndex: number) {
+        return new Bezier(inkData.slice(segIndex, segIndex + 4).map(pt => ({ x: pt.X, y: pt.Y })));
+    }
+
     [Copy]() {
         return new InkField(this.inkData);
     }