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Torque/SDK/lib/maxsdk40/interval.h

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+/**********************************************************************
+ *<
+	FILE: interval.h
+
+	DESCRIPTION:  Defines TimeValue and Interval Classes
+
+	CREATED BY: Rolf Berteig
+
+	HISTORY: created 13 September 1994
+             950818 - Added methods for setting start/end individually (gus)
+
+ *>	Copyright (c) 1994, All Rights Reserved.
+ **********************************************************************/
+
+
+#ifndef _INTERVAL_H_
+#define _INTERVAL_H_
+
+
+class Interval {
+	private:
+		TimeValue	start;
+		TimeValue	end;
+
+	public:		
+		/* 
+		 Constructors:
+		 */		
+		CoreExport Interval( TimeValue s, TimeValue e );
+		Interval() { SetEmpty(); } 
+
+		int operator==( const Interval& i ) { return( i.start==start && i.end==end ); }
+		CoreExport int InInterval(const TimeValue t);
+		int InInterval(const Interval interval) { return InInterval( interval.Start() ) && InInterval( interval.End() ); }
+		int Empty() { return (start == TIME_NegInfinity) && (end == TIME_NegInfinity); }
+
+		void Set       ( TimeValue s, TimeValue e ) { start = s; end = e; }
+		void SetStart  ( TimeValue s )              { start = s;          }
+		void SetEnd    ( TimeValue e )              { end = e;            }
+
+		void SetEmpty() { start = TIME_NegInfinity; end = TIME_NegInfinity; }
+		void SetInfinite() { start = TIME_NegInfinity; end = TIME_PosInfinity; }
+		void SetInstant(const TimeValue t) { start = end = t; }
+		TimeValue Start() const { return start; }
+		TimeValue End() const { return end; }
+		TimeValue Duration() const { return end-start+TimeValue(1); } // end points included
+
+		// intersection of intervals
+		CoreExport Interval operator&(const Interval i) const;
+		Interval& operator&=(const Interval i) { return (*this = (*this&i)); }
+		Interval& operator+=(const TimeValue t) { if (t<start) start=t; if (t>end) end=t; return *this; }
+};
+
+#define FOREVER Interval(TIME_NegInfinity, TIME_PosInfinity)
+#define NEVER Interval(TIME_NegInfinity, TIME_NegInfinity)
+
+#endif
+
+