//-------------------------------------------------------------------
// SVector.cpp - A vector math library.
// By: Aaron Hilton (c) 1/21/98
//-------------------------------------------------------------------
#include <math.h>
#include <stdio.h>
#include "rsRand.h"
#include "SVector.h"

//-------------------------------------------
// General utility functions.

//-------------------------------------------
// Prints the vector's coordinates to the "stderr" stream.
void SVector3D::Print (char *s)
{
	// If we have an informative string, then print it.
	if (s)
		fprintf (stderr, "%s\n", s);

	// Print the vector info.
	fprintf (stderr, ">%12g\t%12g\t%12g\t%12g\n", (double)x, (double)y, (double)z, (double)w);
}

// Randomly generates a new vector.
void SVector3D::Rand ()
{
	x = 1.f - rsRandf (2.f);
	y = 1.f - rsRandf (2.f);
	z = 1.f - rsRandf (2.f);
}

//-------------------------------------------
// Calculates the equation of "b" to the power of "e".
int IPower (int b, int e)
{
	int result = 1;

	// Loop the multiplication process for each exponent.
	while (e--)
		result *= b;

	return result;
}