dd-tangent
function ddTangent(ps: number[][], t: number): number[][]
Defined in local-properties-at-t/tangent/double-double/dd-tangent.ts:17
Returns the tangent vector (in double-double precision not necessarily of
unit length) of an order 0,1,2 or 3 bezier curve at a specific given
parameter value t, i.e. returns the [x,y] value of the once
differentiated (with respect to t) bezier curve's power basis when
evaluated at t.
Parameters:
| Name | Type | Description |
|---|---|---|
ps | number[][] | a linear, quadratic or cubic bezier, e.g. [[0,0],[1,1],[2,1],[2,0]] |
t | number | the t parameter |