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Fixes #29 #30

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Fixes #29 #30

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17 changes: 12 additions & 5 deletions src/Containers-Array2D/CTAlternateArray2D.class.st
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Original file line number Diff line number Diff line change
Expand Up @@ -33,16 +33,23 @@ CTAlternateArray2D class >> width2Height3 [
{ #category : 'iterate' }
CTAlternateArray2D >> allPositionsDo: aBlock [
"Execute a Block on all the positions (points) of the receiver."
self firstPosition pointTo: self dimension do: aBlock
1 to: self height do: [ :y |
1 to: self width do: [ :x |aBlock value: (x @ y)]]
]

{ #category : 'iterate' }
CTAlternateArray2D >> allPositionsWithin: someDistance from: someOrigin [
| answer topLeft bottomRight |
| answer xRange yRange |
answer := OrderedCollection new.
topLeft := someOrigin - someDistance max: self firstPosition.
bottomRight := someOrigin + someDistance min: self dimension.
topLeft pointTo: bottomRight do: [ :each | answer add: each ].
xRange := (someOrigin x - someDistance x max: 1) to:
(someOrigin x + someDistance x min: self width).

yRange := (someOrigin y - someDistance y max: 1) to:
(someOrigin y + someDistance y min: self height).

yRange do: [ :y |
answer addAll: (xRange collect: [ :x | x @ y ]) ].

^ answer
]

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