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

1 files changed, 21 insertions, 0 deletions

diff --git a/src/fields/InkField.ts b/src/fields/InkField.ts
index 123d32301..17b99b033 100644
--- a/src/fields/InkField.ts
+++ b/src/fields/InkField.ts
@@ -14,6 +14,7 @@ export enum InkTool {
     StrokeEraser = 'strokeeraser',
     SegmentEraser = 'segmenteraser',
     RadiusEraser = 'radiuseraser',
+    Eraser = 'eraser', // not a real tool, but a class of tools
     Stamp = 'stamp',
     Write = 'write',
     PresentationPin = 'presentationpin',
@@ -103,6 +104,26 @@ export class InkField extends ObjectField {
         const top = Math.min(...ys);
         return { right, left, bottom, top, width: right - left, height: bottom - top };
     }
+
+    // for some reason bezier.js doesn't handle the case of intersecting a linear curve, so we wrap the intersection
+    // call in a test for linearity
+    public static bintersects(curve: Bezier, otherCurve: Bezier) {
+        // eslint-disable-next-line @typescript-eslint/no-explicit-any
+        if ((curve as any)._linear) {
+            // bezier.js doesn't intersect properly if the curve is actually a line -- so get intersect other curve against this line, then figure out the t coordinates of the intersection on this line
+            const intersections = otherCurve.lineIntersects({ p1: curve.points[0], p2: curve.points[3] });
+            if (intersections.length) {
+                const intPt = otherCurve.get(intersections[0]);
+                const intT = curve.project(intPt).t;
+                return intT ? [intT] : [];
+            }
+        }
+        // eslint-disable-next-line @typescript-eslint/no-explicit-any
+        if ((otherCurve as any)._linear) {
+            return curve.lineIntersects({ p1: otherCurve.points[0], p2: otherCurve.points[3] });
+        }
+        return curve.intersects(otherCurve);
+    }
 }
 
 ScriptingGlobals.add('InkField', InkField);