tangent
function tangent(ps: number[][], t: number): number[]
Defined in local-properties-at-t/tangent/double/tangent.ts:18
Returns the tangent vector (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.
- uses double precision calculations internally
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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 |