Animate on callback

I am playing around with this package and I came with an issue that animations do not get started on callback.

I think I am doing this wrong entirely, but here’s the idea of what I am trying to achieve and I am seeking for help or ideas how to solve this.

I have n number of points along y axis. I get them by measuring views with .measure function provided by react-native. When my draggable box gets dragged to some dropzone I want it to snap to the center of that dropzone.

code for my y translation

  this._transY = cond(
     eq(this.state, State.ACTIVE),
     [
       set(this.transY, addY),
       set(this.prevDragY, this.dragY),
       this.transY
     ],
     [
       cond(eq(this.state, State.END), call([addX, absY], this.onDrop)),
       set(this.prevDragY, 0),
       this.transY
     ]
   );

my onDrop callback

 onDrop([x, y]) {
    let id = null;
   // just identifying on which dropzone draggable was dropped
    for(let i = 0; i < this.props.dropzones.length; i++) {
      let item = this.props.dropzones[i];
      if( y < item.yPage+item.height && y > item.yPage) {
        id = i;
        break;
      }
    }

   if(id !== null) {
    console.log(this.props.dropzones[id]);
  // this if gets called
  // I identify my dropzone correctly and I have correct coordinates for it here
  // but this block never gets executed and my draggable never animates
    this._transY = block(
    [
      debug('active', this._transY), 
       //these sets might not be correct, please don't mind them
      set(this.transY, add(this.transY, sub(this.props.dropzones[id].yPage, add(this.prevDragY, this.dragY)))),
      set(this.prevDragY, add(this.transY, sub(this.props.dropzones[id].yPage, add(this.prevDragY, this.dragY)))),
      this.transY,
    ]);
   }
  }

[Kida007]

Thanks for the quick reply .

Actually this.modal was undefined , cause runSpring was already defined out of the class ( my bad).

Your suggestion above worked , prior to this : I was not using the declarative power of the react-native-reanimated. so thanks again.

and also you are right about Interpolation , That is the correct way.

[nstfkc]

@Kida007 No problem, my pleasure.