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//==================================================================
// Copyright 2002, softSurfer (www.softsurfer.com)
// This code may be freely used and modified for any purpose
// providing that this copyright notice is included with it.
// SoftSurfer makes no warranty for this code, and cannot be held
// liable for any real or imagined damage resulting from it's use.
// Users of this code must verify correctness for their application.
//==================================================================
// Heavily modified by Randal A. Koene, 20050112
#include "Point3D.hh"
#include "Vector3D.hh"
Vector3D Vector3D::operator-() {
Vector3D v;
v.x = -x; v.y = -y; v.z = -z;
return v;
}
// Unary 2D perp operator
Vector3D Vector3D::operator~() {
// continue even if not 2D
Vector3D v;
v.x = -y; v.y = x; v.z = z;
return v;
}
Vector3D operator*( int c, Vector3D w ) {
Vector3D v;
v.x = c * w.x;
v.y = c * w.y;
v.z = c * w.z;
return v;
}
Vector3D operator*( double c, Vector3D w ) {
Vector3D v;
v.x = c * w.x;
v.y = c * w.y;
v.z = c * w.z;
return v;
}
Vector3D operator*( Vector3D w, int c ) {
Vector3D v;
v.x = c * w.x;
v.y = c * w.y;
v.z = c * w.z;
return v;
}
Vector3D operator*( Vector3D w, double c ) {
Vector3D v;
v.x = c * w.x;
v.y = c * w.y;
v.z = c * w.z;
return v;
}
// Scalar division
Vector3D operator/( Vector3D w, int c ) {
Vector3D v;
v.x = w.x / c;
v.y = w.y / c;
v.z = w.z / c;
return v;
}
Vector3D operator/( Vector3D w, double c ) {
Vector3D v;
v.x = w.x / c;
v.y = w.y / c;
v.z = w.z / c;
return v;
}
Vector3D Vector3D::operator+( Vector3D w ) {
Vector3D v;
v.x = x + w.x;
v.y = y + w.y;
v.z = z + w.z;
return v;
}
Vector3D Vector3D::operator-( Vector3D w ) {
Vector3D v;
v.x = x - w.x;
v.y = y - w.y;
v.z = z - w.z;
return v;
}
// 3D Exterior Cross Product
Vector3D Vector3D::operator^( Vector3D w ) {
Vector3D v;
v.x = y * w.z - z * w.y;
v.y = z * w.x - x * w.z;
v.z = x * w.y - y * w.x;
return v;
}
Vector3D& Vector3D::operator^=( Vector3D w ) { // 3D exterior cross product
double ox=x, oy=y, oz=z;
x = oy * w.z - oz * w.y;
y = oz * w.x - ox * w.z;
z = ox * w.y - oy * w.x;
return *this;
}
double Vector3D::normalize() {
double ln = sqrt( x*x + y*y + z*z );
if (ln == 0.0) return 0.0;
x /= ln;
y /= ln;
z /= ln;
return ln;
}
Vector3D sum( int n, int c[], Vector3D w[] ) { // vector sum
Vector3D v;
for (int i=0; i<n; i++) {
v.x += c[i] * w[i].x;
v.y += c[i] * w[i].y;
v.z += c[i] * w[i].z;
}
return v;
}
Vector3D sum( int n, double c[], Vector3D w[] ) { // vector sum
Vector3D v;
for (int i=0; i<n; i++) {
v.x += c[i] * w[i].x;
v.y += c[i] * w[i].y;
v.z += c[i] * w[i].z;
}
return v;
}
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