cubic-hermite ============= [Cubic hermite spline](http://en.wikipedia.org/wiki/Cubic_Hermite_spline) for interpolating position/velocity pairs. Simplest quick and dirty way to get a smooth path between points ## Install npm install cubic-hermite ## Example ```javascript var hermite = require("cubic-hermite") //Compute intial position and velocity var initial_position = [0, 1] , initial_velocity = [1, 0] , final_positions = [1, 0] , final_velocity = [0, 1] //Plot curve for(var t=0.0; t<1.0; t+=0.1) { console.log(hermite(initial_position, initial_velocity, final_position, final_velocity, t)) } ``` ## API ### `require("cubic-hermite")(p0, v0, p1, v1, t[, result])` Computes an interpolated position between initial and final configurations at time t. Arguments can be either scalars or arrays * `p0` is the initial position * `v0` is the initial velocity * `p1` is the final position * `v1` is the final velocity * `t` is the point on the curve to interpolate to in the range [0,1] * `result` is a vector that gets the result of the interpolation (if not specified, a new vector is created) **Returns** The interpolated point on the curve ### `require("cubic-hermite").derivative(p0, v0, p1, v1, t[, result])` Returns the velocity along the curve at a point t * `p0` is the initial position * `v0` initial velocity * `p1` final position * `v1` final velocity * `t` point on the curve to interpolate to, in the range [0,1] * `result` stores the result of the interpolation. (if not specified, is reallocated) **Returns** The interpolated velocity at the time `t` ## Credits (c) 2013 Mikola Lysenko. MIT License