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| Line 3: |
Line 3: |
| ===[[Spreading.scn]]=== | | ===[[Spreading.scn]]=== |
| ===[[Model.sel]]=== | | ===[[Model.sel]]=== |
| ===[[Spreading.lse]]===
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|
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| LSEVENT: SpreadingTypes
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|
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| DEFINITIONS
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| LAYER: DistanceFromSrc, Visited
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|
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| GLOBAL VARIABLE: SpreadType
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|
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| CLUSTER VARIABLE: StartLocation
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| CELL VARIABLE: distInc, d
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| ENDDEF
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|
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| RETURNTIME
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| RETURNTIME = 0
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| DistanceFromSrc = (NUMROWS^2 + NUMCOLS^2)^0.5
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| ENDRT
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|
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| EVENTLOCATION
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| REGION LOCATION(LOCATION(NUMROWS/2, NUMCOLS/2))
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| ENDEL
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|
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| PROBINIT
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| PROBINIT = 1
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| StartLocation = Location
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| distInc = 0
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| d = 0
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| ENDPI
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|
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| TRANSITIONS
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| TRANSITIONS = (d < DistanceFromSrc)
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| Visited = 1
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| DistanceFromSrc = d
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| ENDTR
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|
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| SPREADTIMESTEP = distInc
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|
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|
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| SPREADLOCATION
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| maxD = IF (1 <= SpreadType <= 3) THEN 1.5 ELSE 1
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|
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| REGION CENTRED(1, maxD)
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| DECISION DistanceFromSrc > (DISTANCE(StartLocation, Location))
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| ENDSL
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|
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|
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| SPREADPROB
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| SPREADPROB = 1
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| d = ROUND(DISTANCE(StartLocation, Location))
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| distInc = CLASSIFY(SpreadType)
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| 0: 1
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| 1: 1
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| 2: DISTANCE(Location, SOURCE Location)
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| 3: MAX(0,d - SOURCE DistanceFromSrc)
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| ENDFN
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| ENDSP
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|
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| [[Spreading1|Return to Spreading1 model overview]]
| |
Revision as of 16:44, 8 November 2006
A simple model to demonstrate spread across a landscape from a single point.
