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"
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COPYRIGHT (c) 1996 by Claus Gittinger
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All Rights Reserved
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This software is furnished under a license and may be used
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only in accordance with the terms of that license and with the
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inclusion of the above copyright notice. This software may not
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be provided or otherwise made available to, or used by, any
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other person. No title to or ownership of the software is
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hereby transferred.
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"
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Geometric subclass:#LineSegment
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instanceVariableNames:'startPoint endPoint'
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classVariableNames:''
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poolDictionaries:''
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category:'Graphics-Geometry'
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!
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!LineSegment class methodsFor:'documentation'!
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282
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copyright
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"
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COPYRIGHT (c) 1996 by Claus Gittinger
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All Rights Reserved
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This software is furnished under a license and may be used
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only in accordance with the terms of that license and with the
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inclusion of the above copyright notice. This software may not
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be provided or otherwise made available to, or used by, any
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other person. No title to or ownership of the software is
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hereby transferred.
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"
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!
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documentation
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"
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286
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LineSegments represent a line consisting of start and endPoint
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(actually, its a vector, since the direction makes a difference when
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instances are compared using #=).
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282
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[author:]
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Claus Gittinger
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[see also:]
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286
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Rectangle Polygon EllipticalArc Circle Spline Curve Point
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282
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GraphicsContext
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"
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286
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! !
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!LineSegment class methodsFor:'instance creation'!
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from:start to:end
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"return a new lineSegment."
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^ self new start:start end:end
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"Created: 8.5.1996 / 20:40:13 / cg"
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!
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with:p1 with:p2
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"return a new lineSegment; the smaller point is taken as startPoint."
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p1 < p2 ifTrue:[
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self new start:p1 end:p2
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].
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^ self new start:p2 end:p1
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"Created: 8.5.1996 / 20:41:03 / cg"
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282
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! !
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!LineSegment methodsFor:'accessing'!
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end
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"return the endPoint"
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^ endPoint
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"Created: 8.5.1996 / 20:41:43 / cg"
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!
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end:aPoint
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"set the endPoint"
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endPoint := aPoint
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"Created: 8.5.1996 / 20:41:54 / cg"
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!
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start
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"return the startPoint"
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^ startPoint
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"Created: 8.5.1996 / 20:41:35 / cg"
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!
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start:aPoint
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"set the startPoint"
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startPoint := aPoint
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"Created: 8.5.1996 / 20:42:07 / cg"
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!
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start:p1 end:p2
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"set both the startPoint and the endPoint"
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startPoint := p1.
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endPoint := p2.
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"Created: 8.5.1996 / 20:48:32 / cg"
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! !
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!LineSegment methodsFor:'converting'!
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asPointArray
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"return an array containing my points."
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^ Array with:startPoint with:endPoint
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"Created: 8.5.1996 / 20:46:08 / cg"
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! !
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!LineSegment methodsFor:'displaying'!
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displayFilledOn:aGC
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"raise an error - a lineSegment cannot be drawn filled"
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self shouldNotImplement
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"Created: 8.5.1996 / 21:04:27 / cg"
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!
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displayStrokedOn:aGC
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"display the receiver in the graphicsContext, aGC"
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aGC displayLineFrom:startPoint to:endPoint
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"
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|v|
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v := View new openAndWait.
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(LineSegment from:10@10 to:50@50) displayStrokedOn:v
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"
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"Modified: 8.5.1996 / 14:40:53 / cg"
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"Created: 8.5.1996 / 21:05:16 / cg"
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! !
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!LineSegment methodsFor:'queries'!
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bounds
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"return the smallest enclosing rectangle"
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|minX maxX minY maxY|
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minX := startPoint x min:endPoint x.
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maxX := startPoint x max:endPoint x.
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minY := startPoint y min:endPoint y.
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maxY := startPoint y max:endPoint y.
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^ Rectangle left:minX right:maxX top:minY bottom:maxY
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"
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(LineSegment from:(10@10) to:(90@90)) bounds
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"
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"Modified: 8.5.1996 / 20:50:03 / cg"
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! !
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!LineSegment class methodsFor:'documentation'!
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282
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version
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^ '$Header: /cvs/stx/stx/libbasic2/LineSegment.st,v 1.3 1996-05-08 19:35:46 cg Exp $'
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! !
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