interval.cpp

一个很好的vc底层代码

/**********************************************************************
 * $Id: Interval.cpp,v 1.7 2004/07/02 13:28:27 strk Exp $
 *
 * GEOS - Geometry Engine Open Source
 * http://geos.refractions.net
 *
 * Copyright (C) 2001-2002 Vivid Solutions Inc.
 *
 * This is free software; you can redistribute and/or modify it under
 * the terms of the GNU Lesser General Public Licence as published
 * by the Free Software Foundation. 
 * See the COPYING file for more information.
 *
 **********************************************************************
 * $Log: Interval.cpp,v $
 * Revision 1.7  2004/07/02 13:28:27  strk
 * Fixed all #include lines to reflect headers layout change.
 * Added client application build tips in README.
 *
 * Revision 1.6  2003/11/07 01:23:42  pramsey
 * Add standard CVS headers licence notices and copyrights to all cpp and h
 * files.
 *
 *
 **********************************************************************/


#include <geos/indexStrtree.h>
#include <geos/util.h>
#include <stdio.h>
#include <typeinfo>

namespace geos {

Interval::Interval(Interval *other) {
	Interval(other->imin,other->imax);
}

Interval::Interval(double newMin,double newMax) {
	Assert::isTrue(newMin<=newMax);
	imin=newMin;
	imax=newMax;
}

double Interval::getCentre() {
	return (imin+imax)/2;
}

Interval* Interval::expandToInclude(Interval *other) {
	imax=max(imax,other->imax);
	imin=min(imin,other->imin);
	return this;
}

bool Interval::intersects(Interval *other) {
	return !(other->imin>imax || other->imax<imin);
}

bool Interval::equals(void *o) {
	if (typeid(o)!=typeid(Interval)) {
		return false;
	}
	Interval *other=(Interval*) o;
	return imin==other->imin && imax==other->imax;
}
}