Improved handling of min rotation distance.

lib/scatter.js

@@ -286,8 +286,8 @@ export class AbstractScatter extends Throwable {
         scaleCloseThreshold = 0.1,
         scaleCloseBuffer = 0.05,
         maxRotation = Angle.degree2radian(5),
-        minRotationDistance = 200,
-        useLowPassFilter = true
+        minRotationDistance = 0,
+        useLowPassFilter = false
     } = {}) {
         if (rotationDegrees != null && rotation != null) {
             throw new Error('Use rotationDegrees or rotation but not both')
@@ -389,10 +389,12 @@ export class AbstractScatter extends Throwable {
             if (this.useLowPassFilter) {
                 rotate = this.rotateLPF.next(rotate)
                 zoom = this.zoomLPF.next(zoom)
-                if (delta.distance < this.minRotationDistance) {
-                    rotate = 0
-                }
             }
+            if (delta.distance < this.minRotationDistance) {
+                let ratio = delta.distance / this.minRotationDistance
+                rotate *= ratio
+            }
+
             this.transform(delta, zoom, rotate, delta.about)
             if (zoom != 1) this.interactionAnchor = delta.about
         }
@@ -1110,8 +1112,9 @@ export class DOMScatter extends AbstractScatter {
             onClose = null,
             scaleCloseThreshold = 0.1,
             scaleCloseBuffer = 0.05,
-            useLowPassFilter = true,
-            maxRotation = Angle.degree2radian(15)
+            useLowPassFilter = false,
+            maxRotation = Angle.degree2radian(15),
+            minRotationDistance = 200
         } = {}
     ) {
         super({
@@ -1137,7 +1140,8 @@ export class DOMScatter extends AbstractScatter {
             scaleCloseBuffer,
             onClose,
             useLowPassFilter,
-            maxRotation
+            maxRotation,
+            minRotationDistance
         })
         if (container == null || width == null || height == null) {
             throw new Error('Invalid value: null')