/**
* Removes the {@link VisualVertex} from the specified {@link GridPoint} on the Grid.
*
* @param gridPoint The GridPoint from which the VisualVertex will be removed
* @return <code>true</code> if a VisualVertex was removed from this GridPoint on the Grid, <code>
* false</code> otherwise
*/
boolean removeVisualVertexAtGridPoint(GridPoint gridPoint) {
// Early negative return if specified GridPoint is invalid
if (!Validation.isValidGridPoint(
gridPoint, this.horizontalGridPoints, this.verticalGridPoints)) {
return false;
}
// Get VisualVertex at specified GridPoint
VisualVertex visualVertex = this.grid[gridPoint.getPositionX()][gridPoint.getPositionY()];
// Return false if GridPoint is empty
if (visualVertex == null) {
return false;
}
// Remove VisualVertex
this.grid[gridPoint.getPositionX()][gridPoint.getPositionY()] = null;
return true;
}
/**
* Returns the {@link VisualVertex} at the specified {@link GridPoint}.
*
* @param gridPoint the GridPoint of the VisualVertex to return
* @return the VisualVertex at the specified GridPoint or <code>null</code> if the GridPoint is
* empty
*/
public VisualVertex getVisualVertexAtGridPoint(GridPoint gridPoint) {
// Early negative return if specified GridPoint is invalid
if (!Validation.isValidGridPoint(
gridPoint, this.horizontalGridPoints, this.verticalGridPoints)) {
return null;
}
// Get VisualVertex at specified GridPoint
VisualVertex visualVertex = this.grid[gridPoint.getPositionX()][gridPoint.getPositionY()];
return visualVertex;
}
