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fractus3_05.cpp
资源名称：fenxin.rar　[点击查看]
上传用户：hzcygd
上传日期：2022-04-30
资源大小：109k
文件大小：3k
源码类别：

分形几何

开发平台：

Visual C++

fractus3_05.cpp：源码内容
  1. //---------------------------------------------------------------------------
  3. #include <vcl.h>
  4. #pragma hdrstop
  6. #include "fractus3_05.h"
  7. //---------------------------------------------------------------------------
  8. #pragma package(smart_init)
  9. #pragma resource "*.dfm"
  10. TForm1 *Form1;
  11. #include "glib.h"
  12. int n_rot;
  13. int N;
  14. double ang,scale,ks;
  15. double r1;
  16. double delta=0.0001;TRect rect;
  17. int colors[16]={0x00000000,0x00FF0000,0x0000FF00,0x00FF8C00,
  18.                 0x000000FF,0x00FF00FF,0x0000FFFF,0x00D7D7D7,
  19.                 0x009BFFFF,0x009BFFFF,0x00A0FF00,0x00FFFF00,
  20.                 0x006E6EFF,0x00FF9BFF,0x009BFFFF,0x00FFFFFF};
  21. //---------------------------------------------------------------------------
  22. __fastcall TForm1::TForm1(TComponent* Owner)
  23.         : TForm(Owner)
  24. {
  25. }
  26. //---------------------------------------------------------------------------
  27. //正多边形为构成元素的递归图形
  28. void __fastcall polygon(double r)
  29.  {TPoint points[5];
  30.   int i;
  31.   turn(180.0);
  32.   warp(r);
  33.   turn(90.0+ang/2);
  34.   for(i=0;i<n_rot;i++)
  35.    {points[i]=Point(LPX,LPY);
  36.     warp(2*r*ks);
  37.     turn(ang);
  38.    }
  39.   turn(90-ang/2);
  40.   warp(r);
  41.   Form1->Image1->Canvas->Polygon(points,n_rot-1);
  42.  }
  43. //---------------------------------------------------------------------------
  45. void __fastcall recurs(double r,int n)
  46. {
  47.   int i,j,k;
  48.   if(n<=N)
  49.    {Form1->Image1->Canvas->Pen->Color=colors[n];
  50.     Form1->Image1->Canvas->Brush->Color=colors[n];
  52.     polygon(r);
  53.     if(n==1)
  54.      {j=n_rot;k=0;}
  55.     else
  56.      {j=n_rot-1;k=1;}
  57.     for(i=0;i<j;i++)
  58.      {turn(180.0);
  59.       turn((i+k)*ang);
  60.       warp(r*(1+scale));
  61.       recurs(r*scale,n+1);
  62.       turn(180.0);
  63.       warp(r*(1+scale));
  64.       turn(-(i+k)*ang);
  65.      }
  66.    }
  67.   Form1->Image1->Canvas->Pen->Color=colors[n-1];
  68. }
  71. void __fastcall TForm1::FormCreate(TObject *Sender)
  72. {
  73.   Image1->Height=0;Image1->Top=0;
  74.   Image1->Width=Screen->Width;Image1->Height=Screen->Height;
  75.   rect=Rect(0,0,Image1->Width,Image1->Height);//清屏
  76.   Image1->Canvas->CopyMode=cmBlackness;
  77.   Image1->Canvas->CopyRect(rect,Image1->Canvas,rect);
  78. }
  79. //---------------------------------------------------------------------------
  81. void __fastcall TForm1::N1Click(TObject *Sender)
  82. {
  83.   Image1->Canvas->CopyRect(rect,Image1->Canvas,rect);
  84.   ang=360.0/n_rot;
  85.   ks=sin(PI/n_rot);
  86.   setlp(320.0,200.0);
  87.   setangle(-90.0);
  88.   recurs(r1,1);
  89. }
  90. //---------------------------------------------------------------------------
  92. void __fastcall TForm1::N2Click(TObject *Sender)
  93. {
  94.   if(SavePictureDialog1->Execute())
  95.     Image1->Picture->SaveToFile(SavePictureDialog1->FileName);
  96. }
  97. //---------------------------------------------------------------------------
  99. void __fastcall TForm1::N3Click(TObject *Sender)
  100. {
  101.   Close();        
  102. }
  103. //---------------------------------------------------------------------------
  105. void __fastcall TForm1::N4_1Click(TObject *Sender)
  106. {
  107.   n_rot=3;N=7;
  108.   scale=0.63;r1=54.0;
  109. }
  110. //---------------------------------------------------------------------------
  112. void __fastcall TForm1::N4_2Click(TObject *Sender)
  113. {
  114.   n_rot=4;N=6;
  115.   scale=0.5;r1=64.0;
  116. }
  117. //---------------------------------------------------------------------------
  119. void __fastcall TForm1::N4_3Click(TObject *Sender)
  120. {
  121.   n_rot=5;N=5;
  122.   scale=0.38;r1=90.0;
  123. }
  124. //---------------------------------------------------------------------------