Use number of indices instead of vertices when setting draw range (#23435)
Use number of indices instead of vertices when setting draw range (#23435)

* Use number of indices instead of vertices when setting draw range

* Set default number of birds to 1024
aardgoose/three.js,WestLangley/three.js,WestLangley/three.js,donmccurdy/three.js,makc/three.js.fork,aardgoose/three.js,06wj/three.js,greggman/three.js,donmccurdy/three.js,Liuer/three.js,Liuer/three.js,mrdoob/three.js,06wj/three.js,gero3/three.js,mrdoob/three.js,jpweeks/three.js,gero3/three.js,makc/three.js.fork,jpweeks/three.js,greggman/three.js