X-Git-Url: http://git.localhorst.tv/?a=blobdiff_plain;f=src%2Fmath%2FVector.h;fp=src%2Fmath%2FVector.h;h=fb07d338986fa2f4b9c0373bc808b911efd18ec0;hb=a3ba4dc677ad7c92eeb78b20b642241563605c9d;hp=0000000000000000000000000000000000000000;hpb=ef2496b3cb7ce66b7f831278be66261834b732e5;p=l2e.git

diff --git a/src/math/Vector.h b/src/math/Vector.h
new file mode 100644
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--- /dev/null
+++ b/src/math/Vector.h
@@ -0,0 +1,181 @@
+#ifndef MATH_VECTOR_H_
+#define MATH_VECTOR_H_
+
+#include <cmath>
+#include <limits>
+#include <ostream>
+
+namespace math {
+
+/// Basic vector class with emphasis on graphical/computational ease of use
+/// rather than mathematical accuracy ;) .
+template<class Scalar>
+class Vector {
+
+public:
+	Vector() : x(0), y(0) { }
+	Vector(Scalar x, Scalar y) : x(x), y(y) { }
+	template<class T>
+	Vector(const Vector<T> &other) : x(other.X()), y(other.Y()) { };
+	template<class T>
+	Vector(T x, T y) : x(x), y(y) { }
+
+public:
+	Scalar X() const { return x; }
+	Scalar Y() const { return y; }
+
+	Scalar &X() { return x; }
+	Scalar &Y() { return y; }
+
+	Scalar Index(Scalar lineLength) const { return Y() * lineLength + X(); }
+	static Vector<Scalar> FromIndex(Scalar index, Scalar lineLength) {
+		return Vector<Scalar>(index % lineLength, index / lineLength);
+	}
+
+	void Lock(const Vector<Scalar> &to);
+
+private:
+	Scalar x, y;
+
+};
+
+
+template<class T>
+inline Vector<T> operator +(const Vector<T> &lhs, const Vector<T> &rhs) {
+	return Vector<T>(lhs.X() + rhs.X(), lhs.Y() + rhs.Y());
+}
+template<class T, class U>
+inline Vector<T> operator +(const Vector<T> &lhs, const Vector<U> &rhs) {
+	return Vector<T>(lhs.X() + rhs.X(), lhs.Y() + rhs.Y());
+}
+
+template<class T>
+inline Vector<T> &operator +=(Vector<T> &lhs, const Vector<T> &rhs) {
+	return lhs = lhs + rhs;
+}
+template<class T, class U>
+inline Vector<T> &operator +=(Vector<T> &lhs, const Vector<U> &rhs) {
+	return lhs = lhs + rhs;
+}
+
+template<class T>
+inline Vector<T> operator -(const Vector<T> &lhs, const Vector<T> &rhs) {
+	return Vector<T>(lhs.X() - rhs.X(), lhs.Y() - rhs.Y());
+}
+template<class T, class U>
+inline Vector<T> operator -(const Vector<T> &lhs, const Vector<U> &rhs) {
+	return Vector<T>(lhs.X() - rhs.X(), lhs.Y() - rhs.Y());
+}
+
+template<class T>
+inline Vector<T> &operator -=(Vector<T> &lhs, const Vector<T> &rhs) {
+	return lhs = lhs - rhs;
+}
+template<class T, class U>
+inline Vector<T> &operator -=(Vector<T> &lhs, const Vector<U> &rhs) {
+	return lhs = lhs - rhs;
+}
+
+template<class T>
+inline Vector<T> operator -(const Vector<T> &v) {
+	return Vector<T>(-v.X(), -v.Y());
+}
+
+template<class T>
+inline Vector<T> operator *(const Vector<T> &v1, const Vector<T> &v2) {
+	return Vector<T>(v1.X() * v2.X(), v1.Y() * v2.Y());
+}
+template<class T>
+inline Vector<T> operator *(const Vector<T> &v, T s) {
+	return Vector<T>(v.X() * s, v.Y() * s);
+}
+template<class T>
+inline Vector<T> operator *(T s, const Vector<T> &v) {
+	return Vector<T>(s * v.X(), s * v.Y());
+}
+
+template<class T>
+inline Vector<T> operator /(const Vector<T> &v1, const Vector<T> &v2) {
+	return Vector<T>(v1.X() / v2.X(), v1.Y() / v2.Y());
+}
+template<class T>
+inline Vector<T> operator /(const Vector<T> &v, T s) {
+	return Vector<T>(v.X() / s, v.Y() / s);
+}
+template<class T>
+inline Vector<T> operator /(T s, const Vector<T> &v) {
+	return Vector<T>(s / v.X(), s / v.Y());
+}
+
+template<class T>
+inline Vector<T> operator %(const Vector<T> &v1, const Vector<T> &v2) {
+	return Vector<T>(v1.X() % v2.X(), v1.Y() % v2.Y());
+}
+template<>
+inline Vector<float> operator %(const Vector<float> &v1, const Vector<float> &v2) {
+	return Vector<float>(std::fmod(v1.X(), v2.X()), std::fmod(v1.Y(), v2.Y()));
+}
+template<>
+inline Vector<double> operator %(const Vector<double> &v1, const Vector<double> &v2) {
+	return Vector<double>(std::fmod(v1.X(), v2.X()), std::fmod(v1.Y(), v2.Y()));
+}
+template<>
+inline Vector<long double> operator %(const Vector<long double> &v1, const Vector<long double> &v2) {
+	return Vector<long double>(std::fmod(v1.X(), v2.X()), std::fmod(v1.Y(), v2.Y()));
+}
+template<class T>
+inline Vector<T> operator %(const Vector<T> &v, T s) {
+	return Vector<T>(v.X() % s, v.Y() % s);
+}
+template<>
+inline Vector<float> operator %(const Vector<float> &v, float s) {
+	return Vector<float>(std::fmod(v.X(), s), std::fmod(v.Y(), s));
+}
+template<>
+inline Vector<double> operator %(const Vector<double> &v, double s) {
+	return Vector<double>(std::fmod(v.X(), s), std::fmod(v.Y(), s));
+}
+template<>
+inline Vector<long double> operator %(const Vector<long double> &v, long double s) {
+	return Vector<long double>(std::fmod(v.X(), s), std::fmod(v.Y(), s));
+}
+
+template<class T>
+inline bool operator ==(const Vector<T> &lhs, const Vector<T> &rhs) {
+	return lhs.X() == rhs.X() && lhs.Y() == rhs.Y();
+}
+
+template<class T>
+inline bool operator !=(const Vector<T> &lhs, const Vector<T> &rhs) {
+	return lhs.X() != rhs.X() || lhs.Y() != rhs.Y();
+}
+
+template<class T>
+inline std::ostream &operator <<(std::ostream &out, const Vector<T> &v) {
+	out << '<' << v.X() << ", " << v.Y() << '>';
+	return out;
+}
+
+
+template <class Scalar>
+void Vector<Scalar>::Lock(const Vector<Scalar> &to) {
+	Vector<Scalar> half(to / Scalar(2));
+	Vector<Scalar> dist((*this) % to);
+
+	if (dist.X() > half.X()) {
+		x += (to.X() - dist.X());
+	} else {
+		x -= dist.X();
+	}
+
+	if (dist.Y() > half.Y()) {
+		y += (to.Y() - dist.Y());
+	} else {
+		y -= dist.Y();
+	}
+}
+
+
+}
+
+#endif /* GEOMETRY_VECTOR_H_ */