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vermiculate.cpp
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vermiculate.cpp
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/*
* @(#) vermiculate.c
* @(#) Copyright (C) 2001 Tyler Pierce ([email protected])
* The full program, with documentation, is available at:
* http://freshmeat.net/projects/fdm
*
* Permission to use, copy, modify, distribute, and sell this software and its
* documentation for any purpose is hereby granted without fee, provided that
* the above copyright notice appear in all copies and that both that
* copyright notice and this permission notice appear in supporting
* documentation. No representations are made about the suitability of this
* software for any purpose. It is provided "as is" without express or
* implied warranty.
*
* Dear ImGui port by Pavel Vasilyev <[email protected]>, May 2023
*/
#include <ctype.h>
#include <math.h>
#include "imgui_elements.h"
#include "random.h"
#include "vermiculate.h"
#define degs2 (degs/2)
#define degs4 (degs/4)
#define degs8 (degs/8)
#define dtor 0.0174532925 /* pi / degs2; */
#define tailmax (thrmax * 2 + 1)
#define tmodes '7'
#define ymax (easel->h - 1)
#define ymin 0
#define xmax (easel->w - 1)
#define xmin 0
#define SPEEDINC 10
#define SPEEDMAX 1000
#define wraparound(VAL,LOWER,UPPER) { \
if (VAL >= UPPER) \
VAL -= UPPER - LOWER; \
else if (VAL < LOWER) \
VAL += UPPER - LOWER; }
#define arrcpy(DEST,SRC) memcpy (DEST, SRC, sizeof(DEST))
static const struct stringAndSpeed
{
const char * const str;
int speed;
}
sampleStrings[] =
{
/* { "]]]]]]]]7ces123400-9-8#c123456#s9998880004#ma3#car9ma6#c-#r1", 600} ,
{ "bmarrrr#c1234#lc5678#lyet]", 600} , */
{ "AEBMN222222223#CAR9CAD4CAOV", 150} ,
{ "mn333#c23#f1#]]]]]]]]]]]3bc9#r9#c78#f9#ma4#", 600} ,
{ "AEBMN22222#CAD4CAORc1#f2#c1#r6", 100} ,
/* { "mn6666666#c1i#f1#y2#sy2#vyety1#ry13i#l", 40} , */
{ "aebmnrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrr#", 500} ,
/* { "bg+++++++++++++++++++++++#mnrrrrrrrrrrrrrrrrrrrrrrr#y1#k", 500}, */
/* { "BMN22222223#CAD4CAOVYAS", 150}, */
/* { "aebmnrrrrrrrrrrrrrrrr#yaryakg--#", 100} , */
{ "mn6rrrrrrrrrrrrrrr#by1i#lcalc1#fnyav" , 200 } ,
{ "mn1rrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrr#by1i#lcalc1#fn", 2000 },
{ "baeMn333333333333333333333333#CerrYerCal", 800 },
{ "baeMn1111111111111111111111111111111111111111111111111111111111#Cer9YesYevYerCal", 1200 },
{ "baMn111111222222333333444444555555#Ct1#lCt2#lCt3#lCt4#lCt5#lCerrYerYet", 1400 },
{ "baMn111111222222333333444444555555#Ct1#lCt2#lCt3#lCt4#lCt5#lCerrYerYetYt1i#lYt1i#sYt1#v", 1400 }
};
bool Vermiculate::wasakeypressed ()
{
if (*instring != 0)
return true;
else
return false;
}
char Vermiculate::readkey ()
{
char readkey_result;
if (*instring == 0)
{
readkey_result = '#';
}
else
{
readkey_result = *instring;
instring++;
};
return toupper (readkey_result);
}
unsigned int Vermiculate::random1 (unsigned int i)
{
return (xoshiro256plus () % i);
}
unsigned long Vermiculate::waitabit ()
{
int result = 0;
cyc += threads;
while (cyc > speed)
{
result += 10000;
cyc -= speed;
}
return result;
}
void Vermiculate::clearscreen ()
{
clear();
fill0(point);
}
void
Vermiculate::sp (int x, int y, uint32_t c)
{
uint32_t color = easel->pal.get_color(c);
if (c == 0)
color = 0;
drawdot(x, y, color);
point[(easel->w * y) + x] = c;
}
int
Vermiculate::gp (int x, int y)
{
return point[(easel->w * y) + x];
}
void
Vermiculate::redraw (int x, int y, int width, int height)
{
int xc, yc;
for (xc = x; xc <= x + width - 1; xc++)
for (yc = y; yc <= y + height - 1; yc++)
if (point[easel->w * yc + xc] != 0)
sp (xc, yc, point[easel->w * yc + xc]);
}
void
Vermiculate::palupdate (bool forceUpdate)
{
if (forceUpdate || *instring == 0)
{
redraw (xmin, ymin, easel->w, easel->h);
}
}
void
Vermiculate::randpal ()
{
int ncolors = tailmax - 1;
easel->pal.rescale(ncolors);
}
void
Vermiculate::gridupdate (bool interruptible)
{
int x, y;
if (gridden > 0)
for (x = 0; x <= xmax && !(wasakeypressed () && interruptible); x += boxw)
for (y = 0; y <= ymax; y += boxh)
{
if (random1 (15) < gridden)
{
#define lesser(A,B) ( ((A)<(B)) ? (A) : (B) )
int max = lesser (x + boxw, xmax);
int xc;
for (xc = x; xc <= max; xc++)
sp (xc, y, 1);
}
if (random1 (15) < gridden)
{
int max = lesser (y + boxh, ymax);
int yc;
for (yc = y; yc <= max; yc++)
sp (x, yc, 1);
}
}
}
void
Vermiculate::bordupdate ()
{
int xbord, ybord;
if (bordcorn == 0 || bordcorn == 1)
ybord = ymin;
else
ybord = ymax;
if (bordcorn == 0 || bordcorn == 3)
xbord = xmin;
else
xbord = xmax;
{
int x, y;
for (x = xmin; x <= xmax; x++)
sp (x, ybord, bordcol);
for (y = ymin; y <= ymax; y++)
sp (xbord, y, bordcol);
}
}
bool
Vermiculate::inbank (unsigned char thr)
{
int c;
if (bnkt > 0)
for (c = 1; c <= bnkt; c++)
if (bank[c - 1] == thr)
return true;
return false;
}
void
Vermiculate::pickbank ()
{
unsigned char thr = 1;
bnkt = 0;
ch = '\0';
do
{
while (inbank (thr))
thr = thr % threads + 1;
palupdate (false);
ch = readkey ();
palupdate (false);
switch (ch)
{
case '+':
case '-':
do
{
if (ch == '+')
thr++;
else
thr--;
wraparound (thr, 1, threads + 1);
}
while (inbank (thr));
break;
case ' ':
bank[++bnkt - 1] = thr;
break;
case '1': case '2': case '3':
case '4': case '5': case '6':
case '7': case '8': case '9':
bank[++bnkt - 1] = ch - '0';
if (bank[bnkt - 1] > threads)
bnkt--;
break;
case 'I':
{
banktype tbank;
int tbankt = 0;
int c;
for (c = 1; c <= threads; c++)
if (!inbank (c))
tbank[++tbankt - 1] = c;
bnkt = tbankt;
arrcpy (bank, tbank);
}
break;
case 'T':
ch = readkey ();
switch (ch)
{
case '1': case '2': case '3':
case '4': case '5': case '6':
case '7': case '8': case '9':
{
int c;
for (c = 1; c <= threads; c++)
if (thread[c - 1].tmode == ch - '0')
bank[++bnkt - 1] = c;
}
break;
}
break;
case 'A':
for (bnkt = 1; bnkt <= threads; bnkt++)
bank[bnkt - 1] = bnkt;
bnkt = threads;
break;
case 'E':
for (bnkt = 1; bnkt <= thrmax; bnkt++)
bank[bnkt - 1] = bnkt;
bnkt = thrmax;
break;
}
}
while (!(bnkt >= threads || ch == 'N' || ch == '\15' || ch == '#'));
if (bnkt == 0 && ch != 'N')
{
bnkt = 1;
bank[0] = thr;
}
palupdate (false);
}
void
Vermiculate::bankmod (char boolop, bool * Bool_)
{
switch (boolop)
{
case 'T':
*Bool_ = !*Bool_;
break;
case 'Y':
*Bool_ = true;
break;
case 'N':
*Bool_ = false;
break;
}
}
void
Vermiculate::newonscreen (unsigned char thr)
{
linedata *LP = &thread[thr - 1];
LP->filled = false;
LP->dead = false;
LP->reclen = (LP->little) ?
random1 (10) + 5 : random1 (rlmax - 30) + 30;
LP->deg = random1 (degs);
LP->y = random1 (easel->h);
LP->x = random1 (easel->w);
LP->recpos = 0;
LP->turnco = 2;
LP->turnsize = random1 (4) + 2;
}
void
Vermiculate::firstinit (unsigned char thr)
{
linedata *LP = &thread[thr - 1];
LP->col = thr + 1;
LP->prey = 0;
LP->tmode = 1;
LP->slice = degs / 3;
LP->orichar = 'R';
LP->spiturn = 5;
LP->selfbounce = false;
LP->realbounce = false;
LP->vhfollow = false;
LP->tailfollow = false;
LP->killwalls = false;
LP->little = false;
LP->ctinc = random1 (2) * 2 - 1;
LP->circturn = ((thr % 2) * 2 - 1) * ((thr - 1) % 7 + 1);
LP->tsc = 1;
LP->tslen = 6;
LP->turnseq[0] = 6;
LP->turnseq[1] = -6;
LP->turnseq[2] = 6;
LP->turnseq[3] = 6;
LP->turnseq[4] = -6;
LP->turnseq[5] = 6;
LP->tclim = (unsigned char) (((real) degs) / 2 / 12);
}
void
Vermiculate::maininit ()
{
if (!instring)
{
int n = random1 (sizeof (sampleStrings) / sizeof (sampleStrings[0]));
if (oinstring) free (oinstring);
instring = oinstring = strdup (sampleStrings[n].str);
speed = sampleStrings[n].speed;
}
boxh = 10;
boxw = 10;
gridden = 0;
bordcorn = 0;
threads = 4;
curviness = 30;
bordcol = 1;
ogd = 8;
ch = '\0';
erasing = true;
{
unsigned char thr;
for (thr = 1; thr <= thrmax; thr++)
{
firstinit (thr);
newonscreen (thr);
}
}
{
int d;
for (d = degs - 1; d >= 0; d--)
{
sinof[d] = sin (d * dtor);
cosof[d] = cos (d * dtor);
if (d % degs4 == 0)
tanof[d] = tanof[d + 1];
else
tanof[d] = tan (d * dtor);
}
}
randpal ();
}
bool Vermiculate::move (unsigned char thr)
{
linedata *LP = &thread[thr - 1];
if (LP->dead)
return (false);
if (LP->prey == 0)
switch (LP->tmode)
{
case 1:
LP->deg += random1 (2 * LP->turnsize + 1) - LP->turnsize;
break;
case 2:
if (LP->slice == degs || LP->slice == degs2 || LP->slice == degs4)
{
if (LP->orichar == 'D')
{
if (LP->deg % degs4 != degs8)
LP->deg = degs4 * random1 (4) + degs8;
}
else if (LP->orichar == 'V')
if (LP->deg % degs4 != 0)
LP->deg = degs4 * random1 (4);
}
if (random1 (100) == 0)
{
if (LP->slice == 0)
LP->deg = LP->deg - degs4 + random1 (degs2);
else
LP->deg += (random1 (2) * 2 - 1) * LP->slice;
}
break;
case 3:
LP->deg += LP->circturn;
break;
case 4:
if (abs (LP->spiturn) > 11)
LP->spiturn = 5;
else
LP->deg += LP->spiturn;
if (random1 (15 - abs (LP->spiturn)) == 0)
{
LP->spiturn += LP->ctinc;
if (abs (LP->spiturn) > 10)
LP->ctinc *= -1;
}
break;
case 5:
LP->turnco = abs (LP->turnco) - 1;
if (LP->turnco == 0)
{
LP->turnco = curviness + random1 (10);
LP->circturn *= -1;
}
LP->deg += LP->circturn;
break;
case 6:
if (abs (LP->turnco) == 1)
LP->turnco *= -1 * (random1 (degs2 / abs (LP->circturn)) + 5);
else if (LP->turnco == 0)
LP->turnco = 2;
else if (LP->turnco > 0)
{
LP->turnco--;
LP->deg += LP->circturn;
}
else
LP->turnco++;
break;
case 7:
LP->turnco++;
if (LP->turnco > LP->tclim)
{
LP->turnco = 1;
LP->tsc = (LP->tsc % LP->tslen) + 1;
}
LP->deg += LP->turnseq[LP->tsc - 1];
break;
}
else
{
int desdeg;
real dy, dx;
if (LP->tailfollow || LP->prey == thr)
{
dx = thread[LP->prey - 1].xrec[thread[LP->prey - 1].recpos] - LP->x;
dy = thread[LP->prey - 1].yrec[thread[LP->prey - 1].recpos] - LP->y;
}
else
{
dx = thread[LP->prey - 1].x - LP->x;
dy = thread[LP->prey - 1].y - LP->y;
}
desdeg =
(LP->vhfollow) ?
((fabs (dx) > fabs (dy)) ?
((dx > 0) ?
0 * degs4
:
2 * degs4)
:
((dy > 0) ?
1 * degs4
:
3 * degs4))
:
((dx > 0) ?
((dy > 0) ?
1 * degs8 : 7 * degs8) : ((dy > 0) ? 3 * degs8 : 5 * degs8));
if (desdeg - desdeg % degs4 != LP->deg - LP->deg % degs4
|| LP->vhfollow)
{
if (!LP->vhfollow)
{
/* Using atan2 here doesn't seem to slow things down: */
desdeg = atan2 (dy, dx) / dtor;
wraparound (desdeg, 0, degs);
}
if (abs (desdeg - LP->deg) <= abs (LP->circturn))
LP->deg = desdeg;
else
LP->deg +=
(desdeg > LP->deg) ?
((desdeg - LP->deg > degs2) ?
-abs (LP->circturn) : abs (LP->circturn))
: ((LP->deg - desdeg > degs2) ?
abs (LP->circturn) : -abs (LP->circturn));
}
else
LP->deg +=
(tanof[LP->deg] >
dy / dx) ? -abs (LP->circturn) : abs (LP->circturn);
}
wraparound (LP->deg, 0, degs);
{
unsigned char oldcol;
real oldy = LP->y, oldx = LP->x;
LP->x += cosof[LP->deg];
wraparound (LP->x, xmin, xmax + 1);
LP->y += sinof[LP->deg];
wraparound (LP->y, ymin, ymax + 1);
#define xi ((int) LP->x)
#define yi ((int) LP->y)
oldcol = gp (xi, yi);
if (oldcol != 0)
{
bool vertwall = false, horiwall = false;
if (oldcol == 1 && ((LP->killwalls && gridden > 0) || LP->realbounce))
{
vertwall = (gp (xi, (int) oldy) == 1);
horiwall = (gp ((int) oldx, yi) == 1);
}
if (oldcol == 1 && LP->realbounce && (vertwall || horiwall))
{
if (vertwall)
LP->deg = -LP->deg + degs2;
else
LP->deg = -LP->deg;
}
else
{
if ((oldcol != LP->col && LP->realbounce)
|| (oldcol == LP->col && LP->selfbounce))
LP->deg += degs4 * (random1 (2) * 2 - 1);
else if (oldcol != LP->col)
LP->deg += degs2;
}
if (LP->killwalls && gridden > 0 && oldcol == 1)
{
if (vertwall && xi + 1 <= xmax)
{
int yy;
for (yy = yi - yi % boxh;
yy <= yi - yi % boxh + boxh && yy <= ymax; yy++)
if (gp (xi + 1, yy) != 1 || yy == ymax)
sp (xi, yy, 0);
}
if (horiwall && yi + 1 <= ymax)
{
int xx;
for (xx = xi - xi % boxw;
xx <= xi - xi % boxw + boxw && xx <= xmax; xx++)
if (gp (xx, yi + 1) != 1 || xx == xmax)
sp (xx, yi, 0);
}
}
if (oldcol != LP->col || LP->selfbounce)
{
LP->x = oldx;
LP->y = oldy;
}
wraparound (LP->deg, 0, degs);
}
}
sp (xi, yi, LP->col);
if (LP->filled)
{
if (erasing)
sp (LP->xrec[LP->recpos], LP->yrec[LP->recpos], 0);
else
sp (LP->xrec[LP->recpos], LP->yrec[LP->recpos], LP->col + thrmax);
}
LP->yrec[LP->recpos] = yi;
LP->xrec[LP->recpos] = xi;
if (LP->recpos == LP->reclen - 1)
LP->filled = true;
if (LP->filled && !erasing)
{
int co = LP->recpos;
LP->dead = true;
do
{
int nextco = co + 1;
wraparound (nextco, 0, LP->reclen);
if (LP->yrec[co] != LP->yrec[nextco]
|| LP->xrec[co] != LP->xrec[nextco])
LP->dead = false;
co = nextco;
}
while (!(!LP->dead || co == LP->recpos));
}
LP->recpos++;
wraparound (LP->recpos, 0, LP->reclen);
return (!LP->dead);
}
bool Vermiculate::render (uint32_t *p)
{
int had_instring = (instring != 0);
int tick = 0;
int this_delay = 0;
int loop = 0;
AGAIN:
if (reset_p)
{
reset_p = 0;
clearscreen ();
{
unsigned char thr;
for (thr = 1; thr <= threads; thr++)
newonscreen (thr);
}
if (autopal)
{
randpal ();
palupdate (false);
}
bordupdate ();
gridupdate (false);
}
{
bool alltrap = true;
unsigned char thr;
for (thr = 1; thr <= threads; thr++)
if (move (thr))
alltrap = false;
if (alltrap) /* all threads are trapped */
reset_p = true;
//if (speed != SPEEDMAX)
// this_delay = waitabit ();
}
if (tick++ > max_ticks && !had_instring)
{
tick = 0;
if (oinstring) free (oinstring);
instring = oinstring = 0;
maininit();
reset_p = true;
autopal = false;
}
//if (this_delay == 0 && loop++ < 1000)
if (loop++ < cycles)
goto AGAIN;
return false;
}
bool Vermiculate::render_gui ()
{
bool up = false;
ScrollableSliderInt("ticks", &max_ticks, 0, 20000, "%d", 8);
ScrollableSliderInt("cycles", &cycles, 0, 1024, "%d", 1);
//up |= ScrollableSliderInt("Speed", &speed, 1, 1024, "%d", 1);
// TODO: select instring
if (up) {
resize(easel->w, easel->h);
}
return up;
}
void Vermiculate::resize (int _w, int _h)
{
clear();
point.resize(easel->w*easel->h);
fill0(point);
reset_p = 1;
instring = 0;
maininit ();
palupdate (true);
consume_instring();
}
void Vermiculate::consume_instring()
{
char boolop;
while (wasakeypressed ())
{
ch = readkey ();
switch (ch)
{
case 'M':
ch = readkey ();
switch (ch)
{
case 'A':
case 'N':
{
unsigned char othreads = threads;
if (ch == 'N')
threads = 0;
do
{
ch = readkey ();
switch (ch)
{
case '1': case '2': case '3':
case '4': case '5': case '6':
case '7': case '8': case '9':
thread[++threads - 1].tmode = ch - '0';
break;
case 'R':
thread[++threads - 1].tmode =
random1 (tmodes - '0') + 1;
break;
}
}
while (!(ch == '\15' || ch == '#'
|| threads == thrmax));
if (threads == 0)
threads = othreads;
reset_p = 1;
}
break;
}
break;
case 'C':
pickbank ();
if (bnkt > 0)
{
ch = readkey ();
switch (ch)
{
case 'D':
ch = readkey ();
switch (ch)
{
case '1': case '2': case '3':
case '4': case '5': case '6':
case '7': case '8': case '9':
/* Careful! The following macro needs to be at the beginning of any
block in which it's invoked, since it declares variables: */
#define forallinbank(LDP) linedata *LDP; int bankc; \
for (bankc = 1; \
((bankc <= bnkt) ? ( \
(LDP = &thread[bank[bankc - 1] - 1], 1) \
) : 0) ; bankc++)
{
forallinbank (L) L->slice = degs / (ch - '0');
}
break;
case 'M':
{
forallinbank (L) L->slice = 0;
}
break;
}
break;
case 'S':
{
forallinbank (L)
{
L->otslen = L->tslen;
L->tslen = 0;
}
}
do
{
char oldch = ch;
ch = readkey ();
{
forallinbank (L)
{
switch (ch)
{
case '0':
case '1': case '2': case '3':
case '4': case '5': case '6':
case '7': case '8': case '9':
L->tslen++;
L->turnseq[L->tslen - 1] = ch - '0';
if (oldch == '-')
L->turnseq[L->tslen - 1] *= -1;
if (bankc % 2 == 0)
L->turnseq[L->tslen - 1] *= -1;
break;
}
}
}
}
while (!(ch == '\15' || ch == '#'
|| thread[bank[0] - 1].tslen == 50));
{
forallinbank (L)
{
int seqSum = 0, c;
if (L->tslen == 0)
L->tslen = L->otslen;
for (c = 1; c <= L->tslen; c++)
seqSum += L->turnseq[c - 1];
if (seqSum == 0)
L->tclim = 1;
else
L->tclim =
(int) (((real) degs2) / abs (seqSum));
L->tsc = random1 (L->tslen) + 1;
}
}
break;
case 'T':
{
ch = readkey ();
{
forallinbank (L)
{
switch (ch)
{
case '1': case '2': case '3':
case '4': case '5': case '6':
case '7': case '8': case '9':
L->tmode = ch - '0';
break;
case 'R':
L->tmode = random1 (tmodes - '0') + 1;
break;
}
}
}
}
break;
case 'O':
ch = readkey ();
{
forallinbank (L) L->orichar = ch;
}
break;
case 'F':
{
banktype fbank;
arrcpy (fbank, bank);
{
int fbnkt = bnkt;
int bankc;
pickbank ();
for (bankc = 1; bankc <= fbnkt; bankc++)
{
linedata *L = &thread[fbank[bankc - 1] - 1];
if (ch == 'N')
L->prey = 0;
else
L->prey = bank[0 + (bankc - 1) % bnkt];
}
}
}
break;
case 'L':
{
forallinbank (L) L->prey = bank[bankc % bnkt];
}
break;
case 'R':
ch = readkey ();
{
forallinbank (L) switch (ch)
{
case '1': case '2': case '3':
case '4': case '5': case '6':
case '7': case '8': case '9':
L->circturn = 10 - (ch - '0');
break;
case 'R':
L->circturn = random1 (7) + 1;
break;
}
}
break;
}
}
break;
case 'T':
case 'Y':
case 'N':
boolop = ch;
pickbank ();
if (bnkt > 0)
{
ch = readkey ();
{
forallinbank (L)
{
switch (ch)
{
case 'S':
bankmod (boolop, &L->selfbounce);
break;
case 'V':
bankmod (boolop, &L->vhfollow);
break;
case 'R':
bankmod (boolop, &L->realbounce);
break;
case 'L':
bankmod (boolop, &L->little);
cleared = true;
break;
case 'T':
bankmod (boolop, &L->tailfollow);
break;
case 'K':
bankmod (boolop, &L->killwalls);
break;
}
}
}
}
break;
case 'R':
if (bordcol == 1)
{
bordcol = 0;
bordupdate ();
bordcorn = (bordcorn + 1) % 4;
bordcol = 1;
bordupdate ();
}
break;
case '1': case '2': case '3':
case '4': case '5': case '6':
case '7': case '8': case '9':
{
int c;
for (c = 1; c <= thrmax; c++)
thread[c - 1].tmode = ch - '0';
}
break;
case '\40':
cleared = true;
break;
case 'E':
erasing = !erasing;
break;
case 'P':
randpal ();
palupdate (true);
break;
case 'G':
{
char dimch = 'B';
bool gridchanged = true;
if (gridden == 0)
gridden = ogd;
do