Enable a GridPositionDistribution with larger grids than actual nodes

(used for #cloudlet-evaluation)

src/de/tud/kom/p2psim/impl/topology/placement/GridPositionDistribution.java

@@ -46,6 +46,12 @@ public class GridPositionDistribution implements PlacementModel {
 	private int placedComponents = 0;
 
 	private PositionVector worldDimensions = null;
+	
+	/**
+	 * Allows us to create a "larger" grid, even if we only have a smaller number of nodes.
+	 * Eg., create a 3*3 grid for only 2 nodes
+	 */
+	private int fakeNumberOfComponents = -1;
 
 	private Random random = Randoms
 			.getRandom(GridPositionDistribution.class);
@@ -73,8 +79,15 @@ public class GridPositionDistribution implements PlacementModel {
 	public void setRandomOffset(boolean randInCell) {
 		this.randInCell = randInCell;
 	}
+	
+	public void setFakeNumberOfComponents(int fakeNumberOfComponents) {
+		this.fakeNumberOfComponents = fakeNumberOfComponents;
+	}
 
 	private void calcPositions2D() {
+		if (fakeNumberOfComponents != -1) {
+			numberOfComponents = fakeNumberOfComponents;
+		}
 		float ratio = (float) (worldDimensions.getX() / worldDimensions.getY());
 		float ratio_1 = 1 / ratio;
 		int anz_x = (int) Math.ceil(Math.sqrt(ratio * numberOfComponents));