mirror of
https://github.com/photonstorm/phaser
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35 lines
1.2 KiB
JavaScript
35 lines
1.2 KiB
JavaScript
/**
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* @author Richard Davey <rich@photonstorm.com>
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* @copyright 2020 Photon Storm Ltd.
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* @license {@link https://opensource.org/licenses/MIT|MIT License}
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*/
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/**
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* Rotate a `point` around `x` and `y` by the given `angle` and `distance`.
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*
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* In polar notation, this maps a point from (r, t) to (distance, t + angle), vs. the origin (x, y).
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*
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* @function Phaser.Math.RotateAroundDistance
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* @since 3.0.0
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*
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* @generic {Phaser.Types.Math.Vector2Like} T - [point,$return]
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*
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* @param {(Phaser.Geom.Point|object)} point - The point to be rotated.
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* @param {number} x - The horizontal coordinate to rotate around.
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* @param {number} y - The vertical coordinate to rotate around.
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* @param {number} angle - The angle of rotation in radians.
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* @param {number} distance - The distance from (x, y) to place the point at.
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*
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* @return {Phaser.Types.Math.Vector2Like} The given point.
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*/
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var RotateAroundDistance = function (point, x, y, angle, distance)
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{
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var t = angle + Math.atan2(point.y - y, point.x - x);
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point.x = x + (distance * Math.cos(t));
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point.y = y + (distance * Math.sin(t));
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return point;
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};
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module.exports = RotateAroundDistance;
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