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is-quad-really-line

function isQuadReallyLine(ps: number[][]): boolean

Defined in global-properties/classification/is-quad-really-line.ts:25

Returns true if the given quadratic bezier curve is really a linear curve (or a point), i.e. if all control points collinear and it can be converted to an order 1 bezier curve (a line) such that the same (x,y) point is returned for the same t value, false otherwise.

  • the required condition is met if: x0 + x2 = 2*x1 and y0 + y2 = 2*y1
  • exact: not susceptible to floating point round-off
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Green circles are draggable!
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Parameters:​

NameTypeDescription
psnumber[][]a quadratic bezier curve given as an array of its control points, e.g. [[1,2],[5,6],[7,8]]