136 lines
2.4 KiB
HolyC
136 lines
2.4 KiB
HolyC
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#help_index "Math"
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public U0 R2P(F64 *_mag=NULL,F64 *_arg=NULL,F64 x,F64 y)
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{//Rect to polar
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//Returns angle in range (-<2D>,<2C>]
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if (_arg)
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*_arg=Arg(x,y);
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if (_mag)
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*_mag=Sqrt(x*x+y*y);
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}
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public U0 P2R(F64 *_x=NULL,F64 *_y=NULL,F64 mag,F64 arg)
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{//Polar to Rect
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if (_x)
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*_x=mag*Cos(arg);
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if (_y)
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*_y=mag*Sin(arg);
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}
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public F64 Wrap(F64 <EFBFBD>,F64 base=-<EFBFBD>)
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{//Returns angle in range [base,base+2*<2A>)
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F64 res=<EFBFBD>%(2*<EFBFBD>);
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if (res>=base+2*<EFBFBD>)
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res-=2*<EFBFBD>;
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else if (res<base)
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res+=2*<EFBFBD>;
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return res;
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}
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public I64 DistSqrI64(I64 x1,I64 y1,I64 x2,I64 y2)
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{//Distance-squared between 2 points.
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I64 dx=x1-x2,dy=y1-y2;
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return dx*dx+dy*dy;
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}
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public F64 ASin(F64 s)
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{//Arc Sin (Inverse Sin).
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F64 c;
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c=s*s;
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if (c>=1.0)
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return <EFBFBD>/2.0;
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c=Sqrt(1.0-c);
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return ATan(s/c);
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}
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public F64 ACos(F64 c)
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{//Arc Cos (Inverse Cos).
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F64 s;
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if (!c)
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return <EFBFBD>/2.0;
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s=c*c;
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if (s>=1.0)
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return 0.0;
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s=Sqrt(1.0-s);
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return ATan(s/c);
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}
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public F64 Sinh(F64 x)
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{//Hyperbolic Sine.
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return 0.5*(Exp(x)-Exp(-x));
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}
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public F64 Cosh(F64 x)
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{//Hyperbolic Cosine.
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return 0.5*(Exp(x)+Exp(-x));
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}
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#help_index "Math/Complex;Data Types/Complex"
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public Complex *CAdd(Complex *sum,Complex *n1,Complex *n2)
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{//sum=n1+n2
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sum->x=n1->x+n2->x;
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sum->y=n1->y+n2->y;
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return sum;
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}
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public Complex *CSub(Complex *diff,Complex *n1,Complex *n2)
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{//diff=n1-n2
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diff->x=n1->x-n2->x;
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diff->y=n1->y-n2->y;
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return diff;
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}
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public Complex *CMul(Complex *prod,Complex *n1,Complex *n2)
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{//prod=n1*n2
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prod->x=n1->x*n2->x-n1->y*n2->y;
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prod->y=n1->x*n2->y+n1->y*n2->x;
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return prod;
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}
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public Complex *CDiv(Complex *quot,Complex *n1,Complex *n2)
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{//quot=n1/n2
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F64 m1,arg1,m2,arg2;
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R2P(&m1,&arg1,n1->x,n1->y);
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R2P(&m2,&arg2,n2->x,n2->y);
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m1/=m2;
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arg1-=arg2;
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quot->x=m1*Cos(arg1);
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quot->y=m1*Sin(arg1);
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return quot;
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}
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public Complex *CScale(Complex *dst,F64 s)
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{//dst*=s
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dst->x*=s;
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dst->y*=s;
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return dst;
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}
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public Complex *CCopy(Complex *dst,Complex *src)
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{//dst=src
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dst->x=src->x;
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dst->y=src->y;
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return dst;
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}
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public Complex *CEqu(Complex *dst,F64 x,F64 y)
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{//dst=(x,y)
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dst->x=x;
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dst->y=y;
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return dst;
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}
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public Complex *CPoly(Complex *dst,I64 n,Complex *zeros,Complex *x)
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{//Eval complex polynomial
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I64 i;
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Complex n1,n2;
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if (n>0) {
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CSub(dst,x,&zeros[0]);
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for (i=1;i<n;i++) {
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CCopy(&n1,dst);
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CMul(dst,&n1,CSub(&n2,x,&zeros[i]));
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}
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} else
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CEqu(dst,1.0,0.0);
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return dst;
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}
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