void InitializeTectonicPlates()
{
// TODO ensure plate can't be chosen twice
for (int i = 0; i < NumberOfPlates; i++)
{
int randomX = random.Next(Width);
int randomY = random.Next(Height);
mapData.Tiles[randomX, randomY].PlateId = i;
mapData.Tiles[randomX, randomY].IsPlateCenter = true;
}
List <Tile> plateEdgeTiles = mapData.Tiles.AsList().Where(t => t.PlateId.HasValue).ToList();
List <Tile> nextPlateEdgeTiles = new List <Tile>();
while (plateEdgeTiles.Count > 0)
{
foreach (Tile plateEdgeTile in plateEdgeTiles)
{
if (plateEdgeTile.PlateId.HasValue)
{
//int floodAmount = random.Next(1, random.Next(2, 5));
//int floodAmount = 1;
int floodAmount = random.Next(2) + 1;
List <Tile> nextLocalEdgeTiles = new List <Tile>();
List <Tile> localEdgeTiles = new List <Tile> {
plateEdgeTile
};
for (int i = 0; i < floodAmount; i++)
{
foreach (Tile localEdgeTile in localEdgeTiles)
{
List <Tile> neighbors = TileHelpers.GetNeighbors(mapData.Tiles, Width, Height, localEdgeTile);
//List<Tile> neighbors = TileHelpers.GetSurrounding(mapData.Tiles, Width, Height, localEdgeTile);
foreach (Tile neighbor in neighbors.Where(x => !x.PlateId.HasValue))
{
if (!neighbor.PlateId.HasValue)
{
neighbor.PlateId = localEdgeTile.PlateId.Value;
nextLocalEdgeTiles.Add(neighbor);
}
}
}
localEdgeTiles.Clear();
localEdgeTiles.AddRange(nextLocalEdgeTiles);
nextLocalEdgeTiles.Clear();
}
nextPlateEdgeTiles.AddRange(localEdgeTiles);
}
}
plateEdgeTiles.Clear();
plateEdgeTiles.AddRange(nextPlateEdgeTiles);
nextPlateEdgeTiles.Clear();
}
// DEBUG TEST, should be 0
Console.WriteLine(mapData.Tiles.AsList().Count(x => !x.PlateId.HasValue));
// Assign border tiles
// TODO smartly combine this with above so we don't have to iterate full list again?
foreach (Tile tile in mapData.Tiles.AsList())
{
List <Tile> neighbors = TileHelpers.GetNeighbors(mapData.Tiles, Width, Height, tile);
if (neighbors.Any(n => n.PlateId != tile.PlateId))
{
tile.IsPlateBorder = true;
}
}
}
void EvaluateTectonics()
{
// TEST EXAMPLES
// PUSHING
//mapData.Tiles = new Tile[1, 2]
//{
// {
// new Tile { X = 0, Y = 0, PlateId = 0, GlobalDriftDirection = Vector2.Left, GlobalDriftStrength = 0.25f, PlateRotationDirection = Vector2.Down, PlateRotationStrength = 1.0f, IsPlateBorder = true},
// new Tile { X = 0, Y = 1, PlateId = 1, GlobalDriftDirection = Vector2.Left, GlobalDriftStrength = 0.25f, PlateRotationDirection = Vector2.Up, PlateRotationStrength = 1.0f, IsPlateBorder = true}
// },
//};
// SEPARATING
//mapData.Tiles = new Tile[1, 2]
//{
// {
// new Tile { X = 0, Y = 0, PlateId = 0, GlobalDriftDirection = Vector2.Left, GlobalDriftStrength = 0.25f, PlateRotationDirection = Vector2.Up, PlateRotationStrength = 1.0f, IsPlateBorder = true},
// new Tile { X = 0, Y = 1, PlateId = 1, GlobalDriftDirection = Vector2.Left, GlobalDriftStrength = 0.25f, PlateRotationDirection = Vector2.Down, PlateRotationStrength = 1.0f, IsPlateBorder = true}
// },
//};
// SHEARING
//mapData.Tiles = new Tile[1, 2]
//{
// {
// new Tile { X = 0, Y = 0, PlateId = 0, GlobalDriftDirection = Vector2.Left, GlobalDriftStrength = 0.25f, PlateRotationDirection = Vector2.Left, PlateRotationStrength = 1.0f, IsPlateBorder = true},
// new Tile { X = 0, Y = 1, PlateId = 1, GlobalDriftDirection = Vector2.Left, GlobalDriftStrength = 0.25f, PlateRotationDirection = Vector2.Right, PlateRotationStrength = 1.0f, IsPlateBorder = true}
// },
//};
// Calculate Pressure
List <Tile> boundaryTiles = mapData.Tiles.AsList().Where(x => x.IsPlateBorder).ToList();
foreach (Tile boundaryTile in boundaryTiles)
{
var neighbors = TileHelpers.GetNeighbors(mapData.Tiles, Width, Height, boundaryTile).Where(t => t.PlateId != boundaryTile.PlateId);
foreach (Tile neighbor in neighbors)
{
// if boundary relative movement plus neighbor relative movement is less than boundary's original, then they're acting on eachother..
// otherwise they're moving the same direction.. can't compare magnitude since that doesn't take direction into account
Vector2 added = boundaryTile.RelativeMovement.UnitVector + neighbor.RelativeMovement.UnitVector;
if (added.X < boundaryTile.RelativeMovement.UnitVector.X || added.Y < boundaryTile.RelativeMovement.UnitVector.Y)
{
Vector2 unitToNeighbor = (new Point(boundaryTile.X, boundaryTile.Y) - new Point(neighbor.X, neighbor.Y)).UnitVector;
// if vector to neighbor aligns with pressure vector, they're pushing against eachother, otherwise separating
float directionalMagnitude = (unitToNeighbor + boundaryTile.RelativeMovement).Magnitude;
if (directionalMagnitude > 1)
{
boundaryTile.Pressure += (boundaryTile.RelativeMovement + neighbor.RelativeMovement).Magnitude;
}
else
{
boundaryTile.Pressure -= (boundaryTile.RelativeMovement + neighbor.RelativeMovement).Magnitude;
}
}
}
// Capping effect
if (boundaryTile.Pressure > 10)
{
boundaryTile.Pressure = 10;
}
if (boundaryTile.Pressure < -10)
{
boundaryTile.Pressure = -10;
}
// TEMPORARY FOR OUTPUT.. normalize pressure to height values
boundaryTile.HeightValue = ((boundaryTile.Pressure + 10) / 20);
boundaryTile.HeightValue = (((boundaryTile.Pressure + 10) / 10) - 0.5f);
}
//List<float> pressures = boundaryTiles.Select(x => x.Pressure).ToList();
//List<float> sortedPressures = pressures.OrderBy(x => x).ToList();
//List<float> bottomHalf = sortedPressures.GetRange(0, sortedPressures.Count / 2);
//List<float> topHalf = sortedPressures.GetRange(sortedPressures.Count / 2, sortedPressures.Count - 1 - (sortedPressures.Count / 2));
//List<float> First = bottomHalf.GetRange(0, bottomHalf.Count / 2);
//List<float> Second = bottomHalf.GetRange(bottomHalf.Count / 2, bottomHalf.Count - 1 - (bottomHalf.Count / 2));
//List<float> Third = topHalf.GetRange(0, topHalf.Count / 2);
//List<float> Fourth = topHalf.GetRange(topHalf.Count / 2, topHalf.Count - 1 - (topHalf.Count / 2));
//float maxPressure = pressures.Max();
//float minPressure = pressures.Min();
//float averagePressure = pressures.Average();
}