pointer history size

config.js

@@ -29,7 +29,7 @@ export const PATH_TRACES_DASHED_OPACITY = 1.0;
 
 // SCALING FACTORS
 export const MASS_CREATION_RATE = 1E1;
-export const POINTER_HISTORY_SIZE = 15;
+export const POINTER_HISTORY_SIZE = 10;
 export const MOTION_TIME_SCALE = 1E-4;
 export const PAN_ACCELERATION = 1E1;
 export const ARROWHEAD_LENGTH = 7;

objects.js

@@ -143,17 +143,17 @@ export class Objects {
   handlePointerMove({x, y, vx, vy}) {
     // If the cursor moves while creating an object, or while an object is selected,
     // update the position and velocity of the object
+    // update the position using the pointer motion but the velocity using the pointer velocity
     const obj = this.getSelectedOrCreating();
+    if (obj === undefined) return;
     if (this.sim.pointer.panning?.velocity) {
       vx += this.sim.pointer.panning.velocity.x;
       vy += this.sim.pointer.panning.velocity.y;
     }
-    if (obj !== undefined) {
-      obj.position.x = x;
-      obj.position.y = y;
-      obj.velocity.x = vx;
-      obj.velocity.y = vy;
-    }
+    obj.position.x = x;
+    obj.position.y = y;
+    obj.velocity.x = vx;
+    obj.velocity.y = vy;
   }
 
   // cb: (obj, idx) => {}

pointer.js

@@ -59,12 +59,12 @@ export class Pointer {
     });
   }
 
-  getPointerVelocity(points) {
+  getPointerVelocity(points = POINTER_HISTORY_SIZE) {
     // Average over pointer history
     if (this.pointerHistory.length < 2) {
       return {x: 0, y: 0, dt: 1};
     }
-    points = points || this.pointerHistory.length;
+    points = Math.min(points, POINTER_HISTORY_SIZE, this.pointerHistory.length);
     const start = this.pointerHistory[this.pointerHistory.length - points];
     const end = this.pointerHistory[this.pointerHistory.length - 1];
     const dt = (end.t - start.t) / 1000;
@@ -122,7 +122,7 @@ export class Pointer {
         if (!dt) {
           this.panning = undefined;
         } else {
-          const v = this.getPointerVelocity(10);
+          const v = this.getPointerVelocity();
           // Convert pointer velocity to simulation scale
           v.x /= this.sim.display.scale;
           v.y /= this.sim.display.scale;

sync

@@ -18,5 +18,7 @@ do_rsync() {
 do_rsync ~/code/gravity-dev/ lentilz:code/gravity-dev/
 do_rsync lentilz:code/gravity-dev/ ~/code/gravity-dev/ 
 
+git status
+
 echo >&2
 echo >&2 "Synced with https://laddhoffman.com/gravity-dev/"