@ue-too/math / index / directionAlignedToTangent

函式: directionAlignedToTangent()

directionAlignedToTangent(direction, tangent): boolean

定義於: index.ts:824

Checks if a direction vector is aligned with a tangent vector.

參數

direction

Point

Direction vector to check

tangent

Point

Tangent vector reference

回傳

boolean

True if direction aligns with tangent (within 90 degrees)

備註

Returns true if the direction is within 90 degrees of either the tangent or its reverse. Useful for determining if movement is along a path.

範例

const direction = { x: 1, y: 0 };
const tangent = { x: 1, y: 0.1 }; // Slightly rotated
directionAlignedToTangent(direction, tangent); // true

const perpendicular = { x: 0, y: 1 };
directionAlignedToTangent(perpendicular, tangent); // false