[Swarm-Support] Problems with ObserverSwarm Solved

[Crile Doscher]

For the benefit of those who might encounter the same problem, I switched my 
elevDisplay from a Value2dDisplay to an Object2dDisplay and set the 
ObjectCollection to a list of cells.  I then added a line to the 
Cell.m: -drawSelfOn method that reads the cell elevation and converts it to 
a number comparable to my colormap.  My thanks to Steve Railsback for 
putting me on the right track - relevant code included below.
C

> From ObserverSwarm.m:
. . .
colormap = [Colormap create: [self getZone]];

//colours [0,90) are assigned to the gray range - darker means lower

//code based on HeatbugObserverSwarm.m

for (i = 0; i < 90; i++)

[colormap setColor: i ToRed: (double)i / 89.0 Green: (double) i / 89.0

Blue: (double) i / 89.0];

//colour 90 is set to blue for cumec display

[colormap setColor: 90 ToName: "blue"];

. . .

elevDisplay = [Object2dDisplay createBegin: self];

[elevDisplay setDisplayWidget: worldRaster];

[elevDisplay setDiscrete2dToDisplay: [modelSwarm getElevSpace]];

[elevDisplay setDisplayMessage: M(drawSelfOn:)];

[elevDisplay setObjectCollection: [[modelSwarm getElevSpace] getCellList]];

> From Cell.m:

-drawSelfOn: (id <Raster>) r {


cellColor = [self getElevLevel]/11.0;

[r drawPointX: x Y: y Color: cellColor];


return self;

}