IKのオリジナル体位でピストンもちゃんとできれば完璧なんだが
http://www.gz-loader.com/polygon/data/1511697860/org/image1515395425.jpg
http://www.gz-loader.com/polygon/data/1511697860/org/image1515395449.jpg
http://www.gz-loader.com/polygon/data/1511697860/org/image1515395465.jpg
http://www.gz-loader.com/polygon/data/1511697860/org/image1515395477.jpg