{$APPTYPE CONSOLE}
{$POINTERMATH ON}
// JCL_DEBUG_EXPERT_GENERATEJDBG OFF
// JCL_DEBUG_EXPERT_INSERTJDBG OFF
// JCL_DEBUG_EXPERT_DELETEMAPFILE OFF
program minarea;

{$R *.res}

uses
  System.SysUtils,
  uLibName in '..\..\..\include\uLibName.pas',
  highgui_c in '..\..\..\include\highgui\highgui_c.pas',
  core_c in '..\..\..\include\ņore\core_c.pas',
  Core.types_c in '..\..\..\include\ņore\Core.types_c.pas',
  imgproc.types_c in '..\..\..\include\imgproc\imgproc.types_c.pas',
  imgproc_c in '..\..\..\include\imgproc\imgproc_c.pas',
  legacy in '..\..\..\include\legacy\legacy.pas',
  calib3d in '..\..\..\include\calib3d\calib3d.pas',
  imgproc in '..\..\..\include\imgproc\imgproc.pas',
  haar in '..\..\..\include\objdetect\haar.pas',
  objdetect in '..\..\..\include\objdetect\objdetect.pas',
  tracking in '..\..\..\include\video\tracking.pas',
  Core in '..\..\..\include\ņore\core.pas';

{$DEFINE ARRAY }

Var
  img: pIplImage;
{$IFNDEF ARRAY}
  storage: pCvMemStorage;
{$ELSE}
  points: pCvPoint;
  pointMat: TCvMat;
{$ENDIF}
  key: Integer;
  i: Integer;
  count: Integer;
  pt0, pt: TCvPoint;
  box: TCvBox2D;
  box_vtx: TBoxPoints;
  center: TCvPoint2D32f;
  icenter: TCvPoint;
  radius: Single;
  ptseq: pCvSeq;

begin
  try
    WriteLn('This program demonstrates finding the minimum enclosing box or circle of a set');
    WriteLn('of points using functions: minAreaRect() minEnclosingCircle().');
    WriteLn('Random points are generated and then enclosed.');
    WriteLn('Call:');
    WriteLn('minarea');

    img := cvCreateImage( cvSize( 500, 500 ), 8, 3 );

{$IFNDEF ARRAY}
    storage := cvCreateMemStorage(0);
{$ENDIF}
    cvNamedWindow('rect & circle', 1);
    While True do
    begin
      count := random(100) + 1;
{$IFNDEF ARRAY}
      ptseq := cvCreateSeq(CV_SEQ_KIND_GENERIC or CV_32SC2, sizeof(TCvContour), sizeof(TCvPoint), storage);
      for i := 0 to count - 1 do
      begin
        pt0.x := random(img^.width div 2) + img^.width div 4;
        pt0.y := random(img^.height div 2) + img^.height div 4;
        cvSeqPush(ptseq, @pt0);
      end;
{$IFNDEF _EiC} // * unfortunately, here EiC crashes */
      box := cvMinAreaRect2(ptseq);
{$ENDIF}
      cvMinEnclosingCircle(ptseq, @center, @radius);
{$ELSE}
      points := Allocmem(count * sizeof(TCvPoint));
      pointMat := cvMat(1, count, CV_32SC2, points);
      for i := 0 to count - 1 do
      begin
        pt0.x := random(img^.width div 2) + img^.width div 4;
        pt0.y := random(img^.height div 2) + img^.height div 4;
        points[i] := pt0;
      end;
{$IFNDEF _EiC}
      box := cvMinAreaRect2(@pointMat, 0);
{$ENDIF}
      cvMinEnclosingCircle(@pointMat, @center, @radius);
{$ENDIF}
      cvBoxPoints(box, box_vtx);
      cvZero(img);
      for i := 0 to count - 1 do
      begin
{$IFNDEF ARRAY}
        pt0 := pCvPoint(CV_GET_SEQ_ELEM(SizeOf(TCvPoint), ptseq, i))^;
{$ELSE}
        pt0 := points[i];
{$ENDIF}
        cvCircle(img, pt0, 2, CV_RGB(255, 0, 0), CV_FILLED, CV_AA, 0);
      end;
{$IFNDEF _EiC}
      pt0.x := cvRound(box_vtx[3].x);
      pt0.y := cvRound(box_vtx[3].y);
      for i := 0 to 3 do
      begin
        pt.x := cvRound(box_vtx[i].x);
        pt.y := cvRound(box_vtx[i].y);
        cvLine(img, pt0, pt, CV_RGB(0, 255, 0), 1, CV_AA, 0);
        pt0 := pt;
      end;
{$ENDIF}
      icenter.x := cvRound(center.x);
      icenter.y := cvRound(center.y);
      cvCircle(img, icenter, cvRound(radius), CV_RGB(255, 255, 0), 1, CV_AA, 0);

      cvShowImage('rect & circle', img);

      if cvWaitKey(0) = 27 then
        Break;
{$IFNDEF ARRAY}
      cvClearMemStorage(storage);
{$ELSE}
      freemem(points);
{$ENDIF}
    end;
    cvDestroyWindow('rect & circle');
  except
    on E: Exception do
      WriteLn(E.ClassName, ': ', E.Message);
  end;

end.