javascript - Rotate a point (of which I have the coordinates), around another known point, by a certain desired angle

Question

body   { margin: 0 }
#leaf  { position: absolute; left: 0px; top; 0px; background-color: silver }
#pointerM { position: absolute; width: 16px; height: 23px; background-image: url('data:image/gif;base64,R0lGODlhEAAXAIABADNj//r9/yH5BAEAAAEALAAAAAAQABcAAAIsBIKparcfmoNJTmrvy5pxzHVR2JHGYp5VOrGqe8LyTFKIZd9SPqp5w9MFEQUAOw==') }
#centerR { position: absolute; width: 16px; height: 23px; background-image: url('data:image/gif;base64,R0lGODlhEAAXAIABAPMAAPr9/yH5BAEAAAEALAAAAAAQABcAAAIsBIKparcfmoNJTmrvy5pxzHVR2JHGYp5VOrGqe8LyTFKIZd9SPqp5w9MFEQUAOw==') }

<div id="leaf" style="width: 180px; height: 180px">
    <div id="pointerM" style="left: 104px; top: 30px"></div>
    <div id="centerR" style="left: 90px; top: 90px"></div>
</div>

question from:https://stackoverflow.com/questions/65838730/rotate-a-point-of-which-i-have-the-coordinates-around-another-known-point-by

Answer 1

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