rotate vector (x1, y1) counterclockwise by the given angle
(angle in radians)
newX = oldX * cos(angle) - oldY * sin(angle)
newY = oldX * sin(angle) + oldY * cos(angle)Vector3 rotated = Quaternion.AngleAxis(-45, Vector3.up) * vector;function rotate(angle: number) {
this.angle += angle
this.x = Math.cos(this.angle) * this.length
this.y = Math.sin(this.angle) * this.length
}/**
* @function rotateVector
* @param {Vector} vector
* @param {number} angle
* @returns {Vector}
* @description Rotates a vector by an angle
*/
export function rotateVector(vector: Vector, angle: number): Vector {
let x = vector.x * Math.cos(angle) - vector.y * Math.sin(angle)
let y = vector.x * Math.sin(angle) + vector.y * Math.cos(angle)
return new Vector(x, y)
}