tangent-exact
function tangentExact(ps: number[][], t: number): number[][]
Defined in local-properties-at-t/tangent/exact/tangent-exact.ts:16
Returns the exact tangent vector (not necessarily of unit length) of an
order 0,1,2 or 3 bezier curve at a specific parameter 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 |