player/js/elements/helpers/TransformElement.js

function TransformElement() {}

TransformElement.prototype = {
  initTransform: function () {
    this.finalTransform = {
      mProp: this.data.ks ? TransformPropertyFactory.getTransformProperty(this, this.data.ks, this) : { o: 0 },
      _matMdf: false,
      _opMdf: false,
      mat: new Matrix(),
    };
    if (this.data.ao) {
      this.finalTransform.mProp.autoOriented = true;
    }

    // TODO: check TYPE 11: Guided elements
    if (this.data.ty !== 11) {
      // this.createElements();
    }
  },
  renderTransform: function () {

    this.finalTransform._opMdf = this.finalTransform.mProp.o._mdf || this._isFirstFrame;
    this.finalTransform._matMdf = this.finalTransform.mProp._mdf || this._isFirstFrame;

    if (this.hierarchy) {
      var mat;
      var finalMat = this.finalTransform.mat;
      var i = 0, len = this.hierarchy.length;
      // Checking if any of the transformation matrices in the hierarchy chain has changed.
      if (!this.finalTransform._matMdf) {
        while (i < len) {
          if (this.hierarchy[i].finalTransform.mProp._mdf) {
            this.finalTransform._matMdf = true;
            break;
          }
          i += 1;
        }
      }

      if (this.finalTransform._matMdf) {
        mat = this.finalTransform.mProp.v.props;
        finalMat.cloneFromProps(mat);
        for (i = 0; i < len; i += 1) {
          mat = this.hierarchy[i].finalTransform.mProp.v.props;
          finalMat.transform(mat[0], mat[1], mat[2], mat[3], mat[4], mat[5], mat[6], mat[7], mat[8], mat[9], mat[10], mat[11], mat[12], mat[13], mat[14], mat[15]);
        }
      }
    }
  },
  globalToLocal: function (pt) {
    var transforms = [];
    transforms.push(this.finalTransform);
    var flag = true;
    var comp = this.comp;
    while (flag) {
      if (comp.finalTransform) {
        if (comp.data.hasMask) {
          transforms.splice(0, 0, comp.finalTransform);
        }
        comp = comp.comp;
      } else {
        flag = false;
      }
    }
    var i, len = transforms.length, ptNew;
    for (i = 0; i < len; i += 1) {
      ptNew = transforms[i].mat.applyToPointArray(0, 0, 0);
      // ptNew = transforms[i].mat.applyToPointArray(pt[0],pt[1],pt[2]);
      pt = [pt[0] - ptNew[0], pt[1] - ptNew[1], 0];
    }
    return pt;
  },
  mHelper: new Matrix(),
};