public void AppendFov_SmallMap_ExpectedCollectionOfVisibleCells()
{
string mapRepresentation = @"####################################
#..................................#
#..###.########....................#
#....#.#......#....................#
#....#.#......#....................#
#.............#....................#
#....#.#......######################
#....#.#...........................#
#....#.#...........................#
#..................................#
####################################";
IMapCreationStrategy <Map> mapCreationStrategy = new StringDeserializeMapCreationStrategy <Map>(mapRepresentation);
IMap map = Map.Create(mapCreationStrategy);
var fieldOfView = new FieldOfView(map);
fieldOfView.ComputeFov(6, 1, 20, true);
var visibleCells = fieldOfView.AppendFov(15, 1, 5, true);
// The field of view should be calculated as follows
//
// ###########################%%%%%%%%%
// #..........................%%%%%%%%%
// #..###.########...........%%%%%%%%%%
// #%%%%#.#%%%%%%#....%%%%%%%%%%%%%%%%%
// %%%%%#.#%%%%%%#...%%%%%%%%%%%%%%%%%%
// %%%%%%.%%%%%%%#..%%%%%%%%%%%%%%%%%%%
// %%%%%#.#%%%%%%####%%%%%%%%%%%%%%%%%%
// %%%%%#.#%%%%%%%%%%%%%%%%%%%%%%%%%%%%
// %%%%%#.#%%%%%%%%%%%%%%%%%%%%%%%%%%%%
// %%%%%%.%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
// %%%%%###%%%%%%%%%%%%%%%%%%%%%%%%%%%%
int floorCells = 0;
int wallCells = 0;
foreach (ICell cell in visibleCells)
{
if (cell.IsWalkable)
{
floorCells++;
}
else
{
wallCells++;
}
}
Assert.AreEqual(117, visibleCells.Count);
Assert.AreEqual(56, floorCells);
Assert.AreEqual(61, wallCells);
}
/// <summary>
/// Performs a field-of-view calculation with the specified parameters and appends it any existing field-of-view calculations.
/// Field-of-view (FOV) is basically a calculation of what is observable in the Map from a given Block with a given light radius.
/// </summary>
/// <example>
/// When a character is holding a light source in a large area that also has several other sources of light such as torches along the walls
/// ComputeFov could first be called for the character and then AppendFov could be called for each torch to give us the final combined FOV given all the light sources
/// </example>
/// <param name="xOrigin">X location of the Block to perform the field-of-view calculation with 0 as the farthest left</param>
/// <param name="yOrigin">Y location of the Block to perform the field-of-view calculation with 0 as the top</param>
/// <param name="radius">The number of Blocks in which the field-of-view extends from the origin Block. Think of this as the intensity of the light source.</param>
/// <param name="lightWalls">True if walls should be included in the field-of-view when they are within the radius of the light source. False excludes walls even when they are within range.</param>
/// <returns>List of Blocks representing what is observable in the Map based on the specified parameters</returns>
public ReadOnlyCollection <IBlock> AppendFoV(int xOrigin, int yOrigin, int radius, bool lightWalls)
{
return(_fieldOfView.AppendFov(xOrigin, yOrigin, radius, lightWalls));
}