CODEWITHSUNDEEP
javascript
herohamp
herohamp

Reputation: 644

Momentum calculated from angle? Javascript

So Im working on a project in javascript and need to set x momentum and y momentum based on the angle. So say there is a 45 degree angle it would set the x momentum and the y momentum to 20 each so it goes in a line. How would I got about converting any angle in either degrees or radians into momentum?

Upvotes: 0

Views: 149

Answers (1)

Viktor Tabori
Viktor Tabori

Reputation: 2207

To use Math.sin and Math.cos, you have to convert degree to radian:

https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Math/sin Math.sin(x): x - a number (given in radians)

If you have radian, then you can use Math.cos to calculate the X factor and Math.sin to calculate the Y factor.

function degreeToRadian(degree)
{
  return degree * Math.PI / 180;
}

function getMomentumFactors(radian)
{
  return {x:Math.cos(radian),y:Math.sin(radian)};
}

var example = getMomentumFactors(degreeToRadian(45));
var momentum = 20;
console.log('x',momentum*example.x,'y',momentum*example.y)

Upvotes: 2

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