static void _fastcall zmo_calcbf(bf_t bfdx, bf_t bfdy,
bf_t bfnewx, bf_t bfnewy,bf_t bfplotmx1, bf_t bfplotmx2, bf_t bfplotmy1,
bf_t bfplotmy2, bf_t bfftemp)
{
bf_t btmp1, btmp2, btmp3, btmp4, btempx, btempy ;
bf_t btmp2a, btmp4a;
int saved; saved = save_stack();
btmp1 = alloc_stack(rbflength+2);
btmp2 = alloc_stack(rbflength+2);
btmp3 = alloc_stack(rbflength+2);
btmp4 = alloc_stack(rbflength+2);
btmp2a = alloc_stack(rbflength+2);
btmp4a = alloc_stack(rbflength+2);
btempx = alloc_stack(rbflength+2);
btempy = alloc_stack(rbflength+2);
/* calc cur screen corner relative to zoombox, when zoombox co-ords
are taken as (0,0) topleft thru (1,1) bottom right */
/* tempx = dy * plotmx1 - dx * plotmx2; */
mult_bf(btmp1,bfdy,bfplotmx1);
mult_bf(btmp2,bfdx,bfplotmx2);
sub_bf(btempx,btmp1,btmp2);
/* tempy = dx * plotmy1 - dy * plotmy2; */
mult_bf(btmp1,bfdx,bfplotmy1);
mult_bf(btmp2,bfdy,bfplotmy2);
sub_bf(btempy,btmp1,btmp2);
/* calc new corner by extending from current screen corners */
/* *newx = sxmin + tempx*(sxmax-sx3rd)/ftemp + tempy*(sx3rd-sxmin)/ftemp; */
sub_bf(btmp1,bfsxmax,bfsx3rd);
mult_bf(btmp2,btempx,btmp1);
/* show_three_bf("fact1",btempx,"fact2",btmp1,"prod ",btmp2,70); */
div_bf(btmp2a,btmp2,bfftemp);
/* show_three_bf("num ",btmp2,"denom",bfftemp,"quot ",btmp2a,70); */
sub_bf(btmp3,bfsx3rd,bfsxmin);
mult_bf(btmp4,btempy,btmp3);
div_bf(btmp4a,btmp4,bfftemp);
add_bf(bfnewx,bfsxmin,btmp2a);
add_a_bf(bfnewx,btmp4a);
/* *newy = symax + tempy*(sy3rd-symax)/ftemp + tempx*(symin-sy3rd)/ftemp; */
sub_bf(btmp1,bfsy3rd,bfsymax);
mult_bf(btmp2,btempy,btmp1);
div_bf(btmp2a,btmp2,bfftemp);
sub_bf(btmp3,bfsymin,bfsy3rd);
mult_bf(btmp4,btempx,btmp3);
div_bf(btmp4a,btmp4,bfftemp);
add_bf(bfnewy,bfsymax,btmp2a);
add_a_bf(bfnewy,btmp4a);
restore_stack(saved);
}
int
JuliabfFractal()
{
// new.x = tmpsqrx - tmpsqry + parm.x;
sub_a_bf(bftmpsqrx, bftmpsqry);
add_bf(bfnew.x, bftmpsqrx, bfparm.x);
// new.y = 2 * bfold.x * bfold.y + parm.y;
mult_bf(bftmp, bfold.x, bfold.y); // ok to use unsafe here
double_a_bf(bftmp);
add_bf(bfnew.y, bftmp, bfparm.y);
return bigfltbailout();
}
int
JuliaZpowerbfFractal()
{
BFComplex parm2;
int saved;
saved = save_stack();
parm2.x = alloc_stack(bflength+2);
parm2.y = alloc_stack(bflength+2);
floattobf(parm2.x, param[2]);
floattobf(parm2.y, param[3]);
ComplexPower_bf(&bfnew, &bfold, &parm2);
add_bf(bfnew.x, bfparm.x, bfnew.x);
add_bf(bfnew.y, bfparm.y, bfnew.y);
restore_stack(saved);
return bigfltbailout();
}
int bfMODbailout()
{
long longmagnitude;
square_bf(bftmpsqrx, bfnew.x);
square_bf(bftmpsqry, bfnew.y);
add_bf(bftmp, bftmpsqrx, bftmpsqry);
longmagnitude = bftoint(bftmp);
if (longmagnitude >= (long)rqlim)
return 1;
copy_bf(bfold.x, bfnew.x);
copy_bf(bfold.y, bfnew.y);
return 0;
}
BFComplex *cplxmul_bf(BFComplex *t, BFComplex *x, BFComplex *y)
{
bf_t tmp1;
int saved;
saved = save_stack();
tmp1 = alloc_stack(rbflength+2);
mult_bf(t->x, x->x, y->x);
mult_bf(t->y, x->y, y->y);
sub_bf(t->x, t->x, t->y);
mult_bf(tmp1, x->x, y->y);
mult_bf(t->y, x->y, y->x);
add_bf(t->y, tmp1, t->y);
restore_stack(saved);
return (t);
}
int bfMANRbailout()
{
long longtempmag;
square_bf(bftmpsqrx, bfnew.x);
square_bf(bftmpsqry, bfnew.y);
add_bf(bftmp, bfnew.x, bfnew.y); // don't need abs since we square it next
// note: in next two lines, bfold is just used as a temporary variable
square_bf(bfold.x, bftmp);
longtempmag = bftoint(bfold.x);
if (longtempmag >= (long)rqlim)
return 1;
copy_bf(bfold.x, bfnew.x);
copy_bf(bfold.y, bfnew.y);
return (0);
}
/* big number declarations */
void calc_corner(bf_t target,bf_t p1,double p2,bf_t p3,double p4,bf_t p5)
{
bf_t btmp1, btmp2 ,btmp3;
int saved; saved = save_stack();
btmp1 = alloc_stack(rbflength+2);
btmp2 = alloc_stack(rbflength+2);
btmp3 = alloc_stack(rbflength+2);
/* use target as temporary variable */
floattobf(btmp3, p2);
mult_bf(btmp1,btmp3,p3);
mult_bf(btmp2,floattobf(target, p4),p5);
add_bf(target,btmp1,btmp2);
add_a_bf(target,p1);
restore_stack(saved);
}
int bfMANHbailout()
{
long longtempmag;
square_bf(bftmpsqrx, bfnew.x);
square_bf(bftmpsqry, bfnew.y);
// note: in next five lines, bfold is just used as a temporary variable
abs_bf(bfold.x, bfnew.x);
abs_bf(bfold.y, bfnew.y);
add_bf(bftmp, bfold.x, bfold.y);
square_bf(bfold.x, bftmp);
longtempmag = bftoint(bfold.x);
if (longtempmag >= (long)rqlim)
return 1;
copy_bf(bfold.x, bfnew.x);
copy_bf(bfold.y, bfnew.y);
return (0);
}