限制默认大小1*1

src/app/working-area/working-area.component.ts

@@ -983,6 +983,12 @@ export class WorkingAreaComponent extends EventEmitter implements OnInit, AfterV
     if (imageAngle === undefined || imageAngle === null) {
       imageAngle = 0;
     }
+    if (imageWidth === undefined || imageWidth === null || imageWidth === 0) {
+      imageWidth = 1;
+    }
+    if (imageHeight === undefined || imageHeight === null || imageHeight === 0) {
+      imageHeight = 1;
+    }
     this.backgroundImage.scale.set(1);
     if (imageUrl === undefined || imageUrl === null || imageUrl === '') {
       this.backgroundImage.texture = this.backgroundTexture;