Suggestion: Sub-shapes within Rooms

[Baaleos]

This is a specific idea that would be useful to my game project - but figured it might be re-usable.

In my game I am working on - each room type will have a specific amount of 'slots' where furniture/devices/interact-able objects can go.

At the moment I don't have anything in place to visualise the slots - but I imagine it would be a case of drawing a series of smaller squares inside a room - ideally adjacent to the walls.

The image would then be visualised with a series of grey outlined boxes inside the room shape. In my game - players could then choose to put objects / devices / technology into those slots.

• While this specific use case is specific to my game. Another person might want this feature so they could create table-top dungeon-esq maps that display traps within the room.

Eg: A player who does not have detect trap - gets the original map - minus the trap outlines, but when they 'detect' the trap - the dungeon master reveals the map that has the traps visible.

[OndrejNepozitek]

Hey! Thanks for the suggestion.

If I understand your suggestion correctly, these sub-shapes would not change the outline of the rooms, so they would not change the behaviour of the layouting algorithm. If this is the case, it's probably not a good idea to add these sub-shapes to the algorithm itself because it would slow it down.

It would be probably better to implement this as a postprocessing step on the output of the algorithm. I added (release 1.0.6, master branch) a simple extension method to the IRoom interface that should help you do this. It could be done as follows:

• Create classic room descriptions for room types
• Define your slots for each room type e.g. as lists of IntVector2and create a mapping from room types to these lists of slots
• Run the algorithm, it produces a position and a room shape for each node in the input graph
• Take the generated layout, go through each room
  • find associated slots
  • the room may have been transformed (e.g. rotated and moved) - so you have to transform all the slots - there is a TransformPointToNewPosition extension method on the IRoom interface and you should use it on all your slots
  • now you have the slot positions of a given room in the final layout

I also implemented an integration test that should demonstrate how it could be done (here):

// Create a rectangular room shape
// Move it away from (0, 0) so that we can properly test the functionality
var rectangleShape = GridPolygon.GetRectangle(10, 4) + new IntVector2(10, 10);

// Create points to be transformed
// These could be for example traps, spawn points, etc.
// We use points of the rectangle here because it is easy to check that the transformation is correct.
var pointsToTransform = rectangleShape.GetPoints();

var mapDescription = new MapDescription<int>();

// Create simple graph with 2 vertices and 1 edge
mapDescription.AddRoom(0);
mapDescription.AddRoom(1);
mapDescription.AddPassage(0, 1);

// Add the rectangle shape
mapDescription.AddRoomShapes(new RoomDescription(rectangleShape, new OverlapMode(1, 0)));

var layoutGenerator = LayoutGeneratorFactory.GetDefaultChainBasedGenerator<int>();
var layout = layoutGenerator.GetLayouts(mapDescription, 1)[0];

foreach (var room in layout.Rooms)
{
    // The points were chosen to be the points of the polygon, so after transforming them, they should
    // be equal to the room.Shape + room.Position points
    var transformedPoints = pointsToTransform.Select(x => room.TransformPointToNewPosition(x));
    var expectedPoints = (room.Shape + room.Position).GetPoints();

    Assert.That(transformedPoints, Is.EquivalentTo(expectedPoints));
}

Is this a solution to your problem/suggestion?