T.Lange T.Lange - 3 months ago 18
Javascript Question

JavaScript: figure out point Y by angle and distance

In my project, I would like to draw a line from point X to point Y.

While I know the position of point X, I only know the angle and the distance of point Y.

So my problem is to get the coordinates of point Y by the angle (from point X) and the distance.

I am using JavaScript for this project and don't want to use any graphical library.




For example:


  • point X (10;20)

  • point Y (10° & 200px from point X)



It is probably pretty basic math, but I have no clue how to do it.

Answer
js> Math.cos(10*Math.PI/180) * 200 + 10
206.9615506024416
js> Math.sin(10*Math.PI/180) * 200 + 20
54.729635533386066

Y is at (207, 55).

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