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Geometry.cpp
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Geometry.cpp
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/*
GEOMETRY.CPP a module for Geometric Shapes Fractals
Thanks to Marcus Rezende
Written in Microsoft Visual C++ by Paul de Leeuw.
*/
#include <stdio.h>
#include "manp.h"
#include "Fract.h"
#include "resource.h"
#include "fractype.h"
#include "menu.h"
#include "anim.h"
#include "polygon.h"
#include "plot.h"
#define MIN(a,b) (a <= b ? a : b)
#define MAX(a,b) (a >= b ? a : b)
#define MAXPOINTS 16
extern long threshold;
extern double mandel_width; /* width of display */
extern double hor; /* horizontal address */
extern double vert; /* vertical address */
extern double ScreenRatio; // ratio of width / height for the screen
//extern double param[];
extern WORD type; // fractal type
extern int subtype; // A - E
extern int curpass, totpasses;
//extern BYTE *PalettePtr; // points to true colour palette
static CPoly polygon; // polygon class
extern int xdots, ydots;
extern CPlot Plot; // image plotting routines
static double xscale, yscale;
static int sides = 7; // number of sides of polygon or star
static long count = 250L; // number of polygons or stars
static BOOL IsStar = TRUE; // spread colours across palette
/**************************************************************************
Geometric Shapes Fractal Type Images
***************************************************************************/
int DoGeometry(void)
{
int i, j, k;
double phase, size, x, y, t;
double u[MAXPOINTS], v[MAXPOINTS];
int a[MAXPOINTS], b[MAXPOINTS];
int h = 8;
int offset;
DWORD colour;
srand((unsigned)time(NULL)); // randomize things
xscale = (double) (xdots - 1) / (mandel_width * ScreenRatio);
yscale = (double) (ydots - 1) / mandel_width;
for (i = 0; i < count; i++)
{
colour = (count < threshold) ? threshold * (DWORD)i / count : (DWORD)(i % threshold);
size = h * (1 - sqrt((double)rand() / 32767.0)) / 50;
x = rand() / 32767.0;
y = rand() / 32767.0;
phase= rand() * PI / 32767.0;
switch (subtype)
{
case 'A':
if (rand() > 16383)
{
u[0] = x + size;
v[0] = y;
u[1] = x;
v[1] = y;
}
else
{
u[0] = x;
v[0] = y - size;
u[1] = x;
v[1] = y;
}
a[0] = (int)((u[0] - hor) * xscale);
a[1] = (int)((u[1] - hor) * xscale);
b[0] = (int)((vert + mandel_width - v[0]) * yscale);
b[1] = (int)((vert + mandel_width - v[1]) * yscale);
Plot.genline(a[0], b[0], a[1], b[1], colour);
break;
case 'B':
case 'C':
case 'D':
t = 2 * PI / sides;
if (subtype == 'B' || subtype == 'C')
offset = 1;
else
offset = (sides % 2) ? sides / 2 : sides / 2 - 1;
for (j = 0; j < sides; j++)
{
u[j] = x + size * cos(j * t + phase);
v[j] = y + size * sin(j * t + phase);
a[j] = (int)((u[j] - hor) * xscale);
b[j] = (int)((vert + mandel_width - v[j]) * yscale);
}
if (subtype == 'C')
{
for (j = 0; j < sides; j++)
polygon.read(a[j], b[j], j); // load verticies
polygon.init(j, colour); // initialise vertices and colour
polygon.calcs(); // find MAX,MIN
polygon.display(Plot); // fill polygon
}
else
{
for (j = 0; j < sides; j++)
{
k = (j + offset < sides) ? j + offset : j + offset - sides;
Plot.genline(a[j], b[j], a[k], b[k], colour);
}
}
break;
}
}
return 0;
}
DLGPROC FAR PASCAL GeometryDlg (HWND hDlg, UINT message, UINT wParam, LONG lParam)
{
static char temp;
static UINT tempParam;
static WORD temp_special;
BOOL bTrans ;
switch (message)
{
case WM_INITDIALOG:
temp = subtype;
switch (subtype)
{
case 'A':
tempParam = IDC_A;
break;
case 'B':
tempParam = IDC_B;
break;
case 'C':
tempParam = IDC_C;
break;
case 'D':
tempParam = IDC_D;
break;
default: // uninitialised
tempParam = IDC_A;
temp = 'A';
break;
}
CheckRadioButton(hDlg, IDC_A, IDC_F, tempParam);
SetDlgItemInt(hDlg, IDC_PARAM1, sides, TRUE);
SetDlgItemInt(hDlg, IDC_PARAM2, count, TRUE);
SetFocus(GetDlgItem(hDlg, tempParam));
return FALSE ;
case WM_COMMAND:
switch ((int) LOWORD(wParam))
{
case IDC_A:
case IDC_B:
case IDC_C:
case IDC_D:
switch ((int) LOWORD(wParam))
{
case IDC_A:
temp = 'A';
break;
case IDC_B:
temp = 'B';
break;
case IDC_C:
temp = 'C';
break;
case IDC_D:
temp = 'D';
break;
}
CheckRadioButton(hDlg, IDC_A, IDC_F, (int) LOWORD(wParam));
return (DLGPROC)TRUE ;
case IDOK:
count = GetDlgItemInt(hDlg, IDC_PARAM2, &bTrans, TRUE);
sides = GetDlgItemInt(hDlg, IDC_PARAM1, &bTrans, TRUE);
if (sides > MAXPOINTS)
sides = MAXPOINTS;
if (sides < 2)
sides = 2;
subtype = temp;
EndDialog (hDlg, TRUE);
return (DLGPROC)TRUE;
case IDCANCEL:
EndDialog (hDlg, FALSE);
return (DLGPROC)FALSE;
}
break;
}
return (DLGPROC)FALSE ;
}