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PCMania 39
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treal39
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vect.cpp
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C/C++ Source or Header
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1993-08-01
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1KB
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64 lines
#include <fstream.h>
#include <math.h>
#include "vect.h"
char Vector::delim = ' ';
ostream& operator<< (ostream &f, const Vector &v)
{
f.setf(ios::showpoint | ios::fixed);
f.width(8);
f.precision(4);
f << v.x << v.delim << v.y << v.delim << v.z;
return f;
}
Vector min (const Vector &v1, const Vector &v2)
{
Vector v;
v.x = (v1.x < v2.x) ? v1.x : v2.x;
v.y = (v1.y < v2.y) ? v1.y : v2.y;
v.z = (v1.z < v2.z) ? v1.z : v2.z;
return v;
}
Vector max (const Vector &v1, const Vector &v2)
{
Vector v;
v.x = (v1.x > v2.x) ? v1.x : v2.x;
v.y = (v1.y > v2.y) ? v1.y : v2.y;
v.z = (v1.z > v2.z) ? v1.z : v2.z;
return v;
}
float angle (const Vector &v1, const Vector &v2)
{
float angle;
float mag1 = mag(v1);
float mag2 = mag(v2);
if (mag1 * mag2 == 0.0)
angle = 0.0;
else {
float cos_theta = (v1 DOT v2) / (mag1 * mag2);
if (cos_theta <= -1.0)
angle = M_PI;
else if (cos_theta >= +1.0)
angle = 0.0;
else
angle = acos(cos_theta);
}
return angle;
}