Re: Basic graphics

[Lionel Pinkhard <lionelp@worldonline.co.za>]

Here goes (this'll run under Dos, and works with my Borland C++):

#include <iostream.h>
#include <stdio.h>

void plot(int x, int y, unsigned char color);
void setmode13h();
void settextmode();
int main();

void plot(int x, int y, unsigned char color) {
    unsigned int voffset;	
    asm {			// since C++ doesn't directly support graphics, we use Assembler code
	mov ax, 0a000h
	mov es, ax
	mov di, voffset
	mov ax, color
	mov [es:di], ax
    }
}

void setmode13h() {
    asm {
        mov ax, 13h
	int 10h
    }
}

void settextmode() {
    asm {
        mov ax, 3h
	int 10h
    }
}

int main() {
    setmode13h();
    plot(5, 5, 5);
    getch();
    settextmode();
    return 0;
}

I think this code should give you an idea, if not, ask!

Kind regards,

Lionel Pinkhard

In response to the following message from Jason Chaplin, dated Tue, Jul 25, 2000 11:30:11p +0100:
> Hi, 
>      I am just starting to learn C/C++ via a distance learning course and so far so good. However I would really like to start playing around with graphics programming (I have a deep yearning to program a scrolling starfield for some reason) I feel I wo
uld pick up the language much faster by actually coding things that I find interesting. I have searched the net but all the source code I have downloaded will not compile for one reason or another. I have downloaded Borland C++ 5.5 and that is the compile
r I am using. All I really want to get me started is a program that will work with the compiler I am using that explains how to open a screen and plot a pixel to screen. I realise that your website is for people that are far more experienced than me but y
ours is one of the best and friendliest sites I have found and I 
> would be very grateful if you could point me in the right direction.
> 
> Regards Jay Chaplin
> 

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