[Feature]: Vector rotation

[rchastain2]

Hello!

What would you think of adding vector rotation?

I have just made this for myself:

type
  TVector2D_ = record helper for TVector2D
    function Rotate(const Angle: Double): TVector2D;
  end;

function TVector2D_.Rotate(const Angle: Double): TVector2D;
var CosA, SinA, X_, Y_: Double;
begin
  SinCos(Angle, SinA, CosA);
  X_ := X;
  Y_ := Y;
  Result.X := X_ * CosA - Y_ * SinA;
  Result.Y := X_ * SinA + Y_ * CosA;
end;

I attach my full program (using AGGPas).

vector-rotation.zip

(By the way, the beginner guide is a very good idea!)

Proposed API

function TVector2D.Rotate(const Angle: Double): TVector2D;

[ikelaiah]

Hi @rchastain2 , thanks for the kind words.
Vector Rotation is definitely a good idea, and would love to include in 1.10.0.

The examples are definitely useful as a working reference.