lottie-web/player/js/utils/shapes/PuckerAndBloatModifier.js

After Effects plugin for exporting animations to SVG + JavaScript or canvas + JavaScript

import {
  extendPrototype,
} from '../functionExtensions';
import PropertyFactory from '../PropertyFactory';
import shapePool from '../pooling/shape_pool';
import {
  ShapeModifier,
} from './ShapeModifiers';

function PuckerAndBloatModifier() {}
extendPrototype([ShapeModifier], PuckerAndBloatModifier);
PuckerAndBloatModifier.prototype.initModifierProperties = function (elem, data) {
  this.getValue = this.processKeys;
  this.amount = PropertyFactory.getProp(elem, data.a, 0, null, this);
  this._isAnimated = !!this.amount.effectsSequence.length;
};

PuckerAndBloatModifier.prototype.processPath = function (path, amount) {
  var percent = amount / 100;
  var centerPoint = [0, 0];
  var pathLength = path._length;
  var i = 0;
  for (i = 0; i < pathLength; i += 1) {
    centerPoint[0] += path.v[i][0];
    centerPoint[1] += path.v[i][1];
  }
  centerPoint[0] /= pathLength;
  centerPoint[1] /= pathLength;
  var clonedPath = shapePool.newElement();
  clonedPath.c = path.c;
  var vX;
  var vY;
  var oX;
  var oY;
  var iX;
  var iY;
  for (i = 0; i < pathLength; i += 1) {
    vX = path.v[i][0] + (centerPoint[0] - path.v[i][0]) * percent;
    vY = path.v[i][1] + (centerPoint[1] - path.v[i][1]) * percent;
    oX = path.o[i][0] + (centerPoint[0] - path.o[i][0]) * -percent;
    oY = path.o[i][1] + (centerPoint[1] - path.o[i][1]) * -percent;
    iX = path.i[i][0] + (centerPoint[0] - path.i[i][0]) * -percent;
    iY = path.i[i][1] + (centerPoint[1] - path.i[i][1]) * -percent;
    clonedPath.setTripleAt(vX, vY, oX, oY, iX, iY, i);
  }
  return clonedPath;
};

PuckerAndBloatModifier.prototype.processShapes = function (_isFirstFrame) {
  var shapePaths;
  var i;
  var len = this.shapes.length;
  var j;
  var jLen;
  var amount = this.amount.v;

  if (amount !== 0) {
    var shapeData;
    var localShapeCollection;
    for (i = 0; i < len; i += 1) {
      shapeData = this.shapes[i];
      localShapeCollection = shapeData.localShapeCollection;
      if (!(!shapeData.shape._mdf && !this._mdf && !_isFirstFrame)) {
        localShapeCollection.releaseShapes();
        shapeData.shape._mdf = true;
        shapePaths = shapeData.shape.paths.shapes;
        jLen = shapeData.shape.paths._length;
        for (j = 0; j < jLen; j += 1) {
          localShapeCollection.addShape(this.processPath(shapePaths[j], amount));
        }
      }
      shapeData.shape.paths = shapeData.localShapeCollection;
    }
  }
  if (!this.dynamicProperties.length) {
    this._mdf = false;
  }
};

export default PuckerAndBloatModifier;