Changeset 63 for trunk/Packages/Common/UGeometric.pas

Timestamp:

Jan 5, 2023, 11:03:33 PM (23 months ago)

Author:

chronos

Message:

• Added: Snap package definition.

File:

• trunk/Packages/Common/UGeometric.pas (modified) (5 diffs)

trunk/Packages/Common/UGeometric.pas

@@ -9 +9 @@
   TPointArray = array of TPoint;
 
+  { TVector }
+
+  TVector = record
+    Position: TPoint;
+    Direction: TPoint;
+    function GetLength: Integer;
+    function GetAngle: Double;
+  end;
+
 function Distance(P1, P2: TPoint): Integer;
 function Dot(const P1, P2: TPoint): Double;
 function AddPoint(const P1, P2: TPoint): TPoint;
 function SubPoint(const P1, P2: TPoint): TPoint;
-function PointToLineDistance(const P, V, W: TPoint): Integer;
+function PointToLineDistance(const P, V, W: TPoint; out Intersect: TPoint): Integer;
 function ComparePoint(P1, P2: TPoint): Boolean;
 function RotatePoint(Center, P: TPoint; Angle: Double): TPoint;
@@ -50 +59 @@
 end;
 
-function PointToLineDistance(const P, V, W: TPoint): Integer;
+function PointToLineDistance(const P, V, W: TPoint; out Intersect: TPoint): Integer;
 var
   l2, t: Double;
@@ -68 +77 @@
   if T < 0 then begin
     Result := Distance(P, V);       // Beyond the 'v' end of the segment
-    exit;
+    Intersect := V;
+    Exit;
   end
   else if T > 1 then begin
     Result := Distance(P, W);  // Beyond the 'w' end of the segment
+    Intersect := W;
     Exit;
   end;
@@ -77 +88 @@
   TT.Y := Trunc(V.Y + T * (W.Y - V.Y));
   Result := Distance(P, TT);
+  Intersect := TT;
 end;
 
@@ -162 +174 @@
 end;
 
+{ TVector }
+
+function TVector.GetLength: Integer;
+begin
+  Result := Trunc(Sqrt(Sqr(Direction.X) + Sqr(Direction.Y)));
+end;
+
+function TVector.GetAngle: Double;
+begin
+  Result := ArcTan2(Direction.Y, Direction.X);
+end;
 
 end.