70 lines
1.4 KiB
C++
70 lines
1.4 KiB
C++
/*
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* Interval.cpp
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*
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* Created on: 03.04.2013
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* Author: Felix
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*/
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#include "Interval.h"
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#include <utility>
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Interval::Interval(float start, float end) :
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start(start),
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end(end) {
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if (this->start > this->end)
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std::swap(this->start, this->end);
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};
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/**
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* Creates an interval from a center point and a radius. The interval
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* ranges from center - radius to center + radius.
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*/
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Interval
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Interval::IntervalFromRadius(float center, float radius) {
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return Interval(center - radius, center + radius);
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}
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/**
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* Creates an Interval from a start and end point.
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*/
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Interval
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Interval::IntervalFromPoints(float start, float end) {
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return Interval(start, end);
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}
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/**
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* Returns the overlap between two intervals, e.g. the overlap between
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* intervals (1,3) and (2,4) is (2,3).
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*/
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Interval
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Interval::getOverlap(Interval other) const {
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if ((start == other.start) && (end == other.end))
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return *this;
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Interval smaller = *this;
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Interval bigger = other;
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if (smaller.start > bigger.start)
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std::swap(smaller, bigger);
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Interval iv(0, 0);
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if (bigger.start < smaller.end) {
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iv.start = bigger.start;
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iv.end = smaller.end;
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}
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else
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iv.start = iv.end = 0.0f;
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return iv;
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}
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/**
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* Returns true if the point is inside the interval.
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*/
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bool
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Interval::isInside(float point) const {
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return start < point && point < end;
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}
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/**
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* Returns the length of the interval (distance between start and end).
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*/
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float
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Interval::getLength() {
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return end - start;
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}
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