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"? true : false" is unnecessary
No.
May you give an explanation of the part with Math.pow substring?
d is for double
100d=100.0
What is D here?
there is a Math.hypot function that you can use.
--> Math.hypot(x2-x1, y2-y1) instead of Math.sqrt((x2-x1)(x2-x1)+(x2x2-x1x1)(x2x2-x1x1)).
bad, bad boy