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authortoma <toma@283d02a7-25f6-0310-bc7c-ecb5cbfe19da>2009-11-25 17:56:58 +0000
committertoma <toma@283d02a7-25f6-0310-bc7c-ecb5cbfe19da>2009-11-25 17:56:58 +0000
commitc90c389a8a8d9d8661e9772ec4144c5cf2039f23 (patch)
tree6d8391395bce9eaea4ad78958617edb20c6a7573 /kolf/vector.cpp
downloadtdegames-c90c389a8a8d9d8661e9772ec4144c5cf2039f23.tar.gz
tdegames-c90c389a8a8d9d8661e9772ec4144c5cf2039f23.zip
Copy the KDE 3.5 branch to branches/trinity for new KDE 3.5 features.
BUG:215923 git-svn-id: svn://anonsvn.kde.org/home/kde/branches/trinity/kdegames@1054174 283d02a7-25f6-0310-bc7c-ecb5cbfe19da
Diffstat (limited to 'kolf/vector.cpp')
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1 files changed, 106 insertions, 0 deletions
diff --git a/kolf/vector.cpp b/kolf/vector.cpp
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+#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;
+}