Moving units when buildings are put atop them

Ok, I don't know how to make an official mod posting so Im just going to wing it!


Title: checkBuildingFirstBuild
PreReq: TGE, RTS SK, World Dom mod + 1.5 update
Purpose: This adds a simple collision check between units and buildings when the buildings are first made. It moves all units away from the building.
Adds:

1. Simple collision of building and unit
2. Keeps buildings from moving

Ok, now on with the code! This was done completely in script, so there is no need to recompile your engines!

Firstly, we add our function into a new file, just to keep it from getting confused elsewhere, server/scripts/core/collisionCheck.cs...

function checkBuildingFirstBuild(%building) {
   echo("------- checkBuildingFirstBuild Function started -------");
   // Get all units within bounding box's radius
   // at building's position
   initContainerRadiusSearch(%building.getPosition(), 5.0, $TypeMasks::ShapeBaseObjectType);
   
   // Determine their position to the building's position
   // and determine a location to aim at
   // find terrain z height at (x,y) position of terrain
   // then pass to %obj.setMoveGoal() for each unit
   
   while ((%targetObject = containerSearchNext()) != 0) {
      %objName = %targetObject.getClassName();

      if (%objName $= "RTSUnit" && %targetObject.getID() != %building.getID()) {
         echo("Snagged a unit in my Box!! Object (" @ %targetObject.getID() @ ") Name: " @        %targetObject.getClassName());  

         %vectMove = -VectorSub(%building.getPosition(), %targetObject.getPosition());
         
         %vectMoveCast = VectorAdd(%targetObject.getPosition(), (2.0 * %vectMove));
         
         // getTerrainHeight("123 456");
         %vectMoveX = getWord( %vectMoveCast, 0);
         %vectMoveY = getWord( %vectMoveCast, 1);
         %vectMoveZ = getTerrainHeight(%vectMoveX SPC %vectMoveY);
         echo("Our new projected location is (" @ %vectMoveX @ ", " @ %vectMoveY @ ", "@ %vectMoveZ @")");
         %vectMoveCast = setWord(%vectMoveCast, 2, %vectMoveZ);
         
         //now move the unit
         //if (%targetObject.getClassName() != "RTSBuilding")
            %targetObject.setMoveGoal(%vectMoveCast);
      }
   }
}

I don't know if anyone had this annoyingly happen, but buildings can move! Now that isn't right in most cases. So I went with a quick-fix. Go into server/scripts/avatars/player.cs and add the bolded line into the setMoveGoal function.

...
function Player::setMoveGoal(%this, %dest)
{
   [b]// buildings should not move!!
   if (getBuildingIndexFromUnitTypeName(%this.getRTSUnitTypeName()) != -1)
      return;[/b]
      
   if (%this.generatePath(%dest))
	{
      %this.curGoal = %dest;
...

And finally you make a simple call to the function in the server/scripts/item/building.cs file, at the end of the serverCmdPlaceBuilding function...

...
  echo("serverCmdPlaceBuilding()--building (" @ %b @ "):");
  [b]checkBuildingFirstBuild(%b);[/b]
  %b.initBuildingActions();
}

Just to note, I also have another version of this that I am working on after I added the villagers move to building to build mod, which changed around some of these functions. The next one will also have the unit go to a bordering position to the building-to-be so that the building doesn't just appear on top of its head! Gimme feedback please!

--Sean