message: fix: Fix transform, which previously get wrong result. (see ) .
diff: @@ -172,15 +172,16 @@ class Transformable {
  sy = Math.sqrt(sy);
  }
  - // rotation is inversed in zrender.
  - this.rotation = Math.atan2(-m[1] / sy, m[0] / sx);
  -
  if (m[0] < 0) {
  sx = -sx;
  }
  if (m[3] < 0) {
  sy = -sy;
  }
  +
  + // rotation is inversed in zrender.
  + this.rotation = Math.atan2(-m[1] / sy, m[0] / sx);
  +
  // Flip can be both represented with rotation and negative scale.
  if (sx < 0 && sy < 0) {
  this.rotation += Math.PI;
  