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added Constraint.currentLength, closes #1184

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liabru 2023-03-18 10:51:17 +00:00
parent e888f3cfda
commit 812f8af1be
1 changed files with 27 additions and 0 deletions
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27
src/constraint/Constraint.js
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@ -335,6 +335,33 @@ var Common = require('../core/Common');
};
};
/**
* Returns the current length of the constraint.
* This is the distance between both of the constraint's end points.
* See `constraint.length` for the target rest length.
* @method currentLength
* @param {constraint} constraint
* @returns {number} the current length
*/
Constraint.currentLength = function(constraint) {
var pointAX = (constraint.bodyA ? constraint.bodyA.position.x : 0)
+ (constraint.pointA ? constraint.pointA.x : 0);
var pointAY = (constraint.bodyA ? constraint.bodyA.position.y : 0)
+ (constraint.pointA ? constraint.pointA.y : 0);
var pointBX = (constraint.bodyB ? constraint.bodyB.position.x : 0)
+ (constraint.pointB ? constraint.pointB.x : 0);
var pointBY = (constraint.bodyB ? constraint.bodyB.position.y : 0)
+ (constraint.pointB ? constraint.pointB.y : 0);
var deltaX = pointAX - pointBX;
var deltaY = pointAY - pointBY;
return Math.sqrt(deltaX * deltaX + deltaY * deltaY);
};
/*
*
* Properties Documentation