1 files changed, 106 insertions, 0 deletions
diff --git a/kolf/vector.cpp b/kolf/vector.cpp
new file mode 100644
index 00000000..f4c05262
--- /dev/null
+++ b/kolf/vector.cpp
@@ -0,0 +1,106 @@
+#include <kdebug.h>
+
+#include "vector.h"
+
+// this and vector.h by Ryan Cummings
+
+// Creates a vector with between two points
+Vector::Vector(const QPoint &source, const QPoint &dest) {
+	_magnitude = sqrt(pow(source.x() - dest.x(), 2) + pow(source.y() - dest.y(), 2));
+	_direction = atan2(source.y() - dest.y(), source.x() - dest.x());
+}
+
+// Creates a vector with between two points
+Vector::Vector(const Point &source, const Point &dest) {
+	_magnitude = sqrt(pow(source.x - dest.x, 2) + pow(source.y - dest.y, 2));
+	_direction = atan2(source.y - dest.y, source.x - dest.x);
+}
+
+// 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 efficiently)
+void Vector::setComponents(double x, double y) {
+	_direction = atan2(y, x);
+	_magnitude = sqrt((x * x) + (y * y));
+}
+
+void debugPoint(const QString &text, const Point &p)
+{
+	kdDebug(12007) << text << " (" << p.x << ", " << p.y << ")" << endl;
+}
+
+void debugVector(const QString &text, const Vector &p)
+{
+	// debug degrees
+	kdDebug(12007) << text << " (magnitude: " << p.magnitude() << ", direction: " << p.direction() << ", direction (deg): " << (360L / (2L * M_PI)) * p.direction() << ")" << endl;
+}