A TempleOS distro for heretics
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#help_index "Math"
public U0 R2P(F64 *_mag=NULL,F64 *_arg=NULL,F64 x,F64 y)
{//Rect to polar
//Returns angle in range (-ã,ã]
if (_arg)
*_arg=Arg(x,y);
if (_mag)
*_mag=Sqrt(x*x+y*y);
}
public U0 P2R(F64 *_x=NULL,F64 *_y=NULL,F64 mag,F64 arg)
{//Polar to Rect
if (_x)
*_x=mag*Cos(arg);
if (_y)
*_y=mag*Sin(arg);
}
public F64 Wrap(F64 é,F64 base=-ã)
{//Returns angle in range [base,base+2*ã)
F64 result=é%(2*ã);
if (result>=base+2*ã)
result-=2*ã;
else if (result<base)
result+=2*ã;
return result;
}
public I64 DistSqrI64(I64 x1,I64 y1,I64 x2,I64 y2)
{//Distance-squared between 2 points.
I64 dx=x1-x2,dy=y1-y2;
return dx*dx+dy*dy;
}
public F64 ASin(F64 s)
{//Arc Sin (Inverse Sin).
F64 c;
c=s*s;
if (c>=1.0)
return ã/2.0;
c=Sqrt(1.0-c);
return ATan(s/c);
}
public F64 ACos(F64 c)
{//Arc Cos (Inverse Cos).
F64 s;
if (!c)
return ã/2.0;
s=c*c;
if (s>=1.0)
return 0.0;
s=Sqrt(1.0-s);
return ATan(s/c);
}
public F64 Sinh(F64 x)
{//Hyperbolic Sine.
return 0.5*(Exp(x)-Exp(-x));
}
public F64 Cosh(F64 x)
{//Hyperbolic Cosine.
return 0.5*(Exp(x)+Exp(-x));
}
#help_index "Math/Complex"
public Complex *CAdd(Complex *n1,Complex *n2,Complex *sum)
{//n1 + n2 -->sum
sum->x=n1->x+n2->x;
sum->y=n1->y+n2->y;
return sum;
}
public Complex *CSub(Complex *n1,Complex *n2,Complex *diff)
{//n1 - n2 -->diff
diff->x=n1->x-n2->x;
diff->y=n1->y-n2->y;
return diff;
}
public Complex *CMul(Complex *n1,Complex *n2,Complex *prod)
{//n1 * n2 -->prod
prod->x=n1->x*n2->x-n1->y*n2->y;
prod->y=n1->x*n2->y+n1->y*n2->x;
return prod;
}
public Complex *CDiv(Complex *n1,Complex *n2,Complex *quot)
{//n1 / n2 -->quot
F64 m1,a1,m2,a2;
R2P(&m1,&a1,n1->x,n1->y);
R2P(&m2,&a2,n2->x,n2->y);
m1/=m2;
a1-=a2;
quot->x=m1*Cos(a1);
quot->y=m1*Sin(a1);
return quot;
}
public Complex *CScale(Complex *dst,F64 s)
{//dst *= s
dst->x*=s;
dst->y*=s;
return dst;
}
public Complex *CCopy(Complex *dst,Complex *src)
{//dst=src
dst->x=src->x;
dst->y=src->y;
return dst;
}
public Complex *CEqu(Complex *dst,F64 x,F64 y)
{//dst=x,y
dst->x=x;
dst->y=y;
return dst;
}
public Complex *CPoly(Complex *dst,Complex *x,Complex *zeros,I64 n)
{//Eval complex polynomial.
I64 i;
Complex n1,n2;
if (n>0) {
CSub(x,&zeros[0],dst);
for (i=1;i<n;i++) {
CCopy(&n1,dst);
CSub(x,&zeros[i],&n2);
CMul(&n1,&n2,dst);
}
} else
CEqu(dst,1.0,0.0);
return dst;
}