Celestin Apprentice 4/Apprentice-Release4.iso/Source Code/C/Snippets/BackInUse 1.0.2/BackInUse.c

Text File | 1995-12-01 | 5.5 KB | 186 lines | [TEXT/CWIE]

// BackInUse
// by Ken Long
// updated for CW7 on 951201

//•---------------------------------------------------------------------------•//
//• "This Old Hack," modernized to run on Think C™ v.5.0.4, by Kenneth A. Long,
//• on 24 July 1993, without the help of Norm Abrahm.  Free, so don't sell.
//•---------------------------------------------------------------------------•//
//• BackInUse.c        Original comments were left in and I added some.
//•---------------------------------------------------------------------------•//
//• Program INUSE.C for the Megamax C compiler
//•  (C) 1986 William Woody, commercial rights reserved

//• If you think this program is cute, please send me computer mail and tell
//• me so!  I personally think it's a cute hack, myself, but what do I know.

//• Though I don't believe this program has any commercial value,  (or ANY
//• monitary value whatsoever), I have reserved commercial rights anyways.
//• Silly me...  But if you want to give it to your friends, please leave
//• my name on the darn thing; I need to feel appreciated.
//•---------------------------------------------------------------------------•//

#include <stdio.h>
#include <quickdraw.h>        //• What they don't tell you is that you need to
                            //• include this for the SRAND macro to work...

//extern int Random ();
extern char *malloc ();

#define MAXX 480
#define MAXY 300
#define MAXM 400

WindowPtr theWindow;
WindowRecord wRecord;
Rect dragRect, linesRect;
Rect windowBounds = { 40, 2, 380, 508 };

struct foo {
    double a,b;            //• This is a point which gets to fly around
    struct foo *next;
};

main ()
{
    short number,n,x,done = 0;
    struct foo *top,*Ptr,*Ptr2;

//    struct {
//        short top, left, bottom, right;
//    } linesRect;

    long ticks;        //• For the delay in the "splash" screen.

    double mx,my,nx,ny;

    MaxApplZone();

#ifdef THINK_C
    InitGraf(&thePort);
#else
    InitGraf(&qd.thePort);
#endif
    InitFonts();
    FlushEvents(everyEvent, 0);
    InitWindows();
    InitMenus();
    TEInit();
    InitDialogs(0L);
    InitCursor();

    //• We can't drag because mouseDown quits us.
    //• But it's here if we want to rig it in later.
    dragRect = qd.screenBits.bounds;

    theWindow = NewWindow (&wRecord, &windowBounds, "\pIn Use", true, 0,
                     (WindowPtr)-1L, false, 0L);
    SetPort (theWindow);


    //• We add a Rect to the window that we can draw in and erase.
    SetRect (&linesRect,0,0,506,380);
//        40, 2, 380, 508
    //• Make sure there's a clean slate to draw in.
    EraseRect (&linesRect);

    MoveTo (10,25);
    TextFont (systemFont);    //• System Font is zero, folks.
    TextSize (12);
    DrawString ("\pProgram InUse.C for the Megamax C compiler");
    MoveTo (10,40);
    DrawString ("\pCopyright©1985 by William Woody, commercial rights reserved.");
    MoveTo (10,55);
    DrawString ("\pTo halt the program, press the mouse Button.");
    TextFont (courier);        //• Change font to Courier 12 bold.
    TextSize (12);
    TextFace (bold);
    MoveTo (10,70);
    DrawString ("\pMade to run on CodeWarrior 7");
    MoveTo (10,85);
    DrawString ("\pBy Kenneth A. Long");
    GetDateTime ((unsigned long*) &qd.randSeed);    //• Seed the random number generator
    TextFont (0);
    TextSize (12);    //• Set all the font stuff back so our SysParams are OK.
    TextFace (0);
    Delay (240L, &ticks);
    EraseRect (&linesRect);        //• Get ready for action, after bragging.

    while  (!done)
    {
        EraseRect (&linesRect);        //• Added to not stack drawings up.
        number =  (Random () & 3) + 2;    //• Number of points generated.
        x = 0;

        top = Ptr = (struct foo *) malloc(sizeof(struct foo));

        //• While horizontal incrementing value is not the same
        //• as number of points...
        while  (x++ != number)

        //• ...this stuff is what it is (?).
        Ptr =  (Ptr->next = (struct foo *) malloc (sizeof(struct foo)));
        Ptr =  (Ptr->next = top);

        mx = 0;
        my = 0;
        nx = 9999999.0;        //• Large numbers for finding minimum value.
        ny = 9999999.0;
        do
        {
            Ptr->a =  (double) Random ();
            if  (Ptr->a > mx) mx = Ptr->a;
            if  (Ptr->a < nx) nx = Ptr->a;
            Ptr->b =  (double) Random ();
            if  (Ptr->b > my) my = Ptr->b;
            if  (Ptr->b < ny) ny = Ptr->b;
            Ptr = Ptr->next;

        }
        //• As long as Ptr ain't the same as top...
        while  (Ptr != top);
            do         //• ...make up the points and create "a".
            {        //• A circularly linked list of points.
                Ptr->a =  (Ptr->a - nx) * MAXX /  (mx - nx);
                Ptr->b =  (Ptr->b - ny) * MAXY /  (my - ny);
                Ptr = Ptr->next;    //• Ptr points to next point.
            }
        //• Again, as long as Ptr ain't the same as top...
        while  (Ptr != top);
            n = 0;        //• ..."n" has 0 value.
            MoveTo ( (int) Ptr->a, (int) Ptr->b);

            //• While that's true, and while incrementing "n" is not the
            //• same as 400 times the number of points generated...
            while  (n++ != MAXM * number)
            {    //• ...move the points around, like this:

                //• Give "Ptr->a" a value of ITSELF times 40, PLUS
                //• the value of "Ptr->next->a" (see above "do loop"),
                //• then divide that product by 41.  That's the H coord.
                Ptr->a =  (Ptr->a * 40 + Ptr->next->a) / 41;

                //• Same for be to get the V coord.
                Ptr->b =  (Ptr->b * 40 + Ptr->next->b) / 41;

                //• Then draw the line.
                LineTo ( (int)Ptr->a, (int)Ptr->b);

                Ptr = Ptr->next;
                if  (Button ())    //• Halt program when Button is pressed.
                {
                    done = 1;    //• It's one DONE puppy!
                    break;        //• Unconditionally get the hell out.
                }
            }    //• done with "while".

            Ptr = top;    //• Clean up the circular linked list.
            do
            {
                Ptr =  (Ptr2 = Ptr)->next;
                free (Ptr2);
            }
            while  (Ptr != top);    //• As long as Ptr aint the top.
        EraseRect (&linesRect);
    }
}