座標轉換 === http://e9714032.blogspot.com/2017/08/blog-post.html i.前乘:Ry(θ) Rx(θ) 先對x軸旋轉,再對原始固定座標y旋轉 ii.後乘:Rx(θ) Ry(θ) 先對x軸旋轉,再對旋轉後之新座標之y軸旋轉
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