smoothed out momentum at object creation

objects.js

@@ -22,8 +22,7 @@ export class Objects {
       this.sim.playing = false;
       this.paused = true;
       if (this.sim.pointer.panning?.velocity) {
-        this.panVelocityPaused = {...this.sim.pointer.panning.velocity};
-        this.sim.pointer.panning = undefined;
+        this.sim.pointer.panning.paused = true;
       }
     }
   }
@@ -32,11 +31,8 @@ export class Objects {
     if (this.paused) {
       this.sim.playing = true;
       this.paused = false;
-      if (this.panVelocityPaused) {
-        this.sim.pointer.panning = {
-          velocity: {...this.panVelocityPaused},
-        };
-        this.panVelocityPaused = undefined;
+      if (this.sim.pointer.panning?.paused) {
+        this.sim.pointer.panning.paused = false;
       }
     }
   }
@@ -48,10 +44,13 @@ export class Objects {
     this.creatingObject = idx;
     this.objects.push(obj);
     // Pause the simulation during mass creation; this avoids some complex local dynamics
-    // TODO: Make this optional (toolbar item to enable)
     if (this.sim.getOption('pauseDuring.creation')) {
       this.pause();
     }
+
+    if (this.sim.pointer.panning?.velocity) {
+      obj.velocity = {...this.sim.pointer.panning.velocity};
+    }
   }
 
   doneCreatingObject() {

pointer.js

@@ -133,7 +133,6 @@ export class Pointer {
   handlePointerDown({x: clientX, y: clientY}) {
     this.updatePointer({x: clientX, y: clientY});
     if (this.sim.isCurrentMode(MODE_MASS_GENERATION)) {
-      // this.panning = undefined;
       const {x, y} = this.sim.screenToSim(clientX, clientY)
       this.sim.objects.handlePointerDown({x, y});
 
@@ -191,7 +190,7 @@ export class Pointer {
     }
 
     // Apply update to viewOrigin based on panning
-    if (this.panning) {
+    if (this.panning && !this.panning.paused) {
       const {velocity} = this.panning;
       // Convert pointer velocity to sim internal scale
       this.sim.display.viewOrigin.x -= velocity.x * elapsedTime;

simulator.js

@@ -82,9 +82,6 @@ export class Sim {
     this.pointer.clearPointerHistory();
 
     if (this.playing && velocity) {
-      // Switch to pan mode
-      this.setCurrentMode(MODE_PAN_VIEW);
-
       this.pointer.panning = { 
         velocity: {
           x: -velocity.x,