Adding a return value in boundary condition.

2019-05-31 15:32:13 +02:00 · 2019-05-31 15:32:13 +02:00 · f39b7ae14a
commit f39b7ae14a
parent aafa528f03
1 changed files with 3 additions and 1 deletions
--- a/lib/scatter.js
+++ b/lib/scatter.js
@ -410,7 +410,9 @@ export class AbstractScatter extends Throwable {

    keepOnStage(velocity, collision = 0.5) {
        let stagePolygon = this.containerPolygon
-        if (!stagePolygon) return
+        // UO: since keepOnStage is called in nextVelocity we need to 
+        // ensure a return value
+        if (!stagePolygon) return { x: 0, y: 0}
        let polygon = this.polygon
        let bounced = this.bouncing()
        if (bounced) {