From:	"=?iso-8859-1?Q?Stefan_Fr=F6berg?=" <traveler AT netti DOT fi>
Newsgroups:	comp.os.msdos.djgpp
Subject:	Not important, just some stuff...
Date:	Wed, 19 Jan 2000 01:57:34 +0200
Organization:	SAUNALAHDEN SERVERIN asiakas
Lines:	122
Message-ID:	<862u3b$ssg$1@tron.sci.fi>
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To:	djgpp AT delorie DOT com
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Reply-To:	djgpp AT delorie DOT com

Tämä on moniosainen MIME-muotoinen viesti.

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Hmmm...
I have been a bit lazy lately with my programming practices (a whole =
month and not a single line of code !).
Anyway, heres something I made with C++ (C++, because I just LOVE =
default parameters, function overloading, etc...)

Any questions and comments are welcome.
"Traveler 2000 AD..."
traveler AT netti DOT fi




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#include <conio.h>
#include <dpmi.h>
#include <go32.h>
#include <math.h>
#include <sys/farptr.h>

typedef	unsigned char	UCHAR;
typedef	unsigned short	USHORT;
typedef	unsigned int	UINT;
typedef unsigned long	ULONG;

enum FILL {SOLID,WIRE};
enum VIDEO {TEXT = 0x3,VGA = 0x13};

double	cos_table[360],
	sin_table[360];


box(int x1,int y1,int x2,int y2,UCHAR color,FILL mode=WIRE);
circle(int center_x,int center_y,ULONG radius,UCHAR color);
putpixel(int x,int y,UCHAR color);
setmode(VIDEO mode);

int	main(void)
{
// Just a pre-calculating the tables for circle function...
	register unsigned long	angle;
	for(angle=0;angle<360;angle++)
	{
		cos_table[angle] = cos(angle * (PI/180));
		sin_table[angle] = sin(angle * (PI/180));
	}

	_farsetsel(_dos_ds);
	setmode(VGA);
	circle(160,100,20,YELLOW);
	box(140,80,180,120,WHITE);
	putpixel(160,100,RED);
	getch();
	setmode(TEXT);
	return(0);
}

void	box(int x1,int y1,int x2,int y2,UCHAR color,FILL mode)
{
	register int	x,
			y;
	int	inc_x = (x2 - x1)/abs(x2 - x1),
		inc_y = (y2 - y1)/abs(y2 - y1);
	for(y = y1;y != (y2+inc_y);y += inc_y)
		for(x = x1;x != (x2+inc_x);x += inc_x)
			switch(mode)
			{
				case SOLID:
					putpixel(x,y,color);
					break;
				case WIRE:
					if(x == x1 || x == x2 || y == y1 || y == y2)
						putpixel(x,y,color);
					break;	
				default:
					break;
			};
}

void	circle(int center_x,int center_y,ULONG radius,UCHAR color)
{
	int	x,
		y;
	register unsigned long	n;
	for(n = 0;n<360;n++)
	{
		x = (int)(cos_table[n] * radius) + center_x;
		y = (int)(sin_table[n] * radius) + center_y;
		putpixel(x,y,color);
	}
}

void	putpixel(int x,int y,UCHAR color)
{
	_farnspokeb(0xa0000+(y<<8)+(y<<6)+x,color);
}

void	setmode(int mode)
{
	static	__dpmi_regs	r;
	r.h.ah = 0x00;
	r.h.al = mode;
	__dpmi_int(0x10,&r);
}



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