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#include "vector.h"
// Creates a vector with between two points
vector::vector(const point &source, const point &dest) {
_magnitude = source.distance(dest);
_direction = source.angle(dest);
}
// Creates an empty vector
vector::vector() {
_magnitude = 0.0;
_direction = 0.0;
}
// Copy another vector object
vector::vector(const vector& v) {
_magnitude = v._magnitude;
_direction = v._direction;
}
// Set the X component
void vector::setComponentX(double x) {
setComponents(x, componentY());
}
// Set the Y component
void vector::setComponentY(double y) {
setComponents(componentX(), y);
}
// Operations with another vector performs vector math
vector vector::operator+(const vector& v) {
double x = componentX() + v.componentX();
double y = componentY() + v.componentY();
return vector(sqrt((x * x) + (y * y)), atan2(y, x));
}
vector vector::operator-(const vector& v) {
double x = componentX() - v.componentX();
double y = componentY() - v.componentY();
return vector(sqrt((x * x) + (y * y)), atan2(y, x));
}
vector& vector::operator+=(const vector& v) {
setComponents(componentX() + v.componentX(), componentY() + v.componentY());
return *this;
}
vector& vector::operator-=(const vector& v) {
setComponents(componentX() - v.componentX(), componentY() - v.componentY());
return *this;
}
double vector::operator*(const vector& v) {
return ((componentX() * v.componentX()) + (componentY() * v.componentY()));
}
// Operations with a single double value affects the magnitude
vector& vector::operator+= (double m) {
_magnitude += m;
return *this;
}
vector& vector::operator-= (double m) {
_magnitude -= m;
return *this;
}
vector& vector::operator*= (double m) {
_magnitude *= m;
return *this;
}
vector& vector::operator/= (double m) {
_magnitude /= m;
return *this;
}
// Sets both components at once (the only way to do it efficently)
void vector::setComponents(double x, double y) {
_direction = atan2(y, x);
_magnitude = sqrt((x * x) + (y * y));
}
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