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#include <element.h>
signed char pos_1_rx[] = {-1,-1,-1, 0, 0, 1, 1, 1};
signed char pos_1_ry[] = {-1, 0, 1,-1, 1,-1, 0, 1};
int update_PIPE(UPDATE_FUNC_ARGS) {
int r, rx, ry, np;
if (parts[i].ctype>=2 && parts[i].ctype<=4)
{
if (parts[i].life==3)
{
// make automatic pipe pattern
for (rx=-1; rx<2; rx++)
for (ry=-1; ry<2; ry++)
if (x+rx>=0 && y+ry>0 && x+rx<XRES && y+ry<YRES && (rx || ry))
{
r = pmap[y+ry][x+rx];
if ((r>>8)>=NPART || !r)
continue;
if ((r&0xFF)==PT_PIPE&&parts[r>>8].ctype==1)
{
parts[r>>8].ctype = (((parts[i].ctype)%3)+2);//reverse
parts[r>>8].life = 6;
}
}
}
else
{
int rndstore, rnd, q, ctype=(((parts[i].ctype)%3)+2);
rndstore = rand();
// RAND_MAX is at least 32767 on all platforms i.e. pow(8,5)-1
// so can go 5 cycles without regenerating rndstore
for (q=0; q<3; q++)
{
rnd = rndstore&7;
rndstore = rndstore>>3;
rx = pos_1_rx[rnd];
ry = pos_1_ry[rnd];
if (x+rx>=0 && y+ry>=0 && x+rx<XRES && y+ry<YRES)
{
r = pmap[y+ry][x+rx];
if ((r>>8)>=NPART)
continue;
else if (!r&&parts[i].tmp!=0)
{
np = create_part(-1,x+rx,y+ry,parts[i].tmp);
if (np!=-1)
{
parts[np].temp = parts[i].temp;//pipe saves temp and life now
parts[np].life = parts[i].flags;
}
parts[i].tmp = 0;
continue;
}
else if (!r)
continue;
else if (parts[i].tmp == 0 && (ptypes[r&0xFF].falldown!= 0 || ptypes[r&0xFF].state == ST_GAS))
{
parts[i].tmp = parts[r>>8].type;
parts[i].temp = parts[r>>8].temp;
parts[i].flags = parts[r>>8].life;
kill_part(r>>8);
}
else if ((r&0xFF)==PT_PIPE && parts[r>>8].ctype!=ctype && parts[r>>8].tmp==0&&parts[i].tmp>0)
{
parts[r>>8].tmp = parts[i].tmp;
parts[r>>8].temp = parts[i].temp;
parts[r>>8].flags = parts[i].flags;
parts[i].tmp = 0;
}
}
}
}
}
else if (!parts[i].ctype && parts[i].life<=10)
{
if (parts[i].temp<272.15)//manual pipe colors
{
if (parts[i].temp>173.25&&parts[i].temp<273.15)
{
parts[i].ctype = 2;
parts[i].life = 0;
}
if (parts[i].temp>73.25&&parts[i].temp<=173.15)
{
parts[i].ctype = 3;
parts[i].life = 0;
}
if (parts[i].temp>=0&&parts[i].temp<=73.15)
{
parts[i].ctype = 4;
parts[i].life = 0;
}
}
else
{
// make a border
for (rx=-2; rx<3; rx++)
for (ry=-2; ry<3; ry++)
if (x+rx>=0 && y+ry>0 && x+rx<XRES && y+ry<YRES && (rx || ry))
{
r = pmap[y+ry][x+rx];
if (!r)
create_part(-1,x+rx,y+ry,PT_BRCK);//BRCK border, people didn't like DMND
}
if (parts[i].life==1)
parts[i].ctype = 1;
}
}
else if (parts[i].ctype==1)//wait for empty space before starting to generate automatic pipe pattern
{
if (!parts[i].life)
{
for (rx=-1; rx<2; rx++)
for (ry=-1; ry<2; ry++)
if (x+rx>=0 && y+ry>0 && x+rx<XRES && y+ry<YRES && (rx || ry))
{
if (!pmap[y+ry][x+rx])
parts[i].life=50;
}
}
else if (parts[i].life==2)
{
parts[i].ctype = 2;
parts[i].life = 6;
}
}
return 0;
}
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