silver-fang-mini-game/node_modules/phaser/plugins/impact/GetVelocity.js

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2024-10-27 19:54:14 +02:00
/**
* @author Richard Davey <rich@photonstorm.com>
* @copyright 2020 Photon Storm Ltd.
* @license {@link https://opensource.org/licenses/MIT|MIT License}
*/
var Clamp = require('../../math/Clamp');
/**
* [description]
*
* @function Phaser.Physics.Impact.GetVelocity
* @since 3.0.0
*
* @param {number} delta - The delta time in ms since the last frame. This is a smoothed and capped value based on the FPS rate.
* @param {number} vel - [description]
* @param {number} accel - [description]
* @param {number} friction - [description]
* @param {number} max - [description]
*
* @return {number} [description]
*/
var GetVelocity = function (delta, vel, accel, friction, max)
{
if (accel)
{
return Clamp(vel + accel * delta, -max, max);
}
else if (friction)
{
var frictionDelta = friction * delta;
if (vel - frictionDelta > 0)
{
return vel - frictionDelta;
}
else if (vel + frictionDelta < 0)
{
return vel + frictionDelta;
}
else
{
return 0;
}
}
return Clamp(vel, -max, max);
};
module.exports = GetVelocity;