/// <summary>
/// Returns a list of outdoor cells within visible range of player
/// </summary>
public List <ObjCell> GetOutdoorCells(ObjCell cell)
{
// get cell x/y global offset
var lcoord = LandDefs.get_outside_lcoord(cell.ID, PhysicsObj.Position.Frame.Origin.X, PhysicsObj.Position.Frame.Origin.Y).Value;
// includes the origin cell
var blockLength = (int)CellRadiusOutside * 2 + 1;
var cells = new List <ObjCell>(/*blockLength * blockLength*/);
var start = new Vector2(lcoord.X - CellRadiusOutside, lcoord.Y - CellRadiusOutside);
var end = new Vector2(lcoord.X + CellRadiusOutside, lcoord.Y + CellRadiusOutside);
for (var cellX = start.X; cellX <= end.X; cellX++)
{
for (var cellY = start.Y; cellY <= end.Y; cellY++)
{
var blockCellID = LandDefs.lcoord_to_gid(cellX, cellY);
var _cell = LScape.get_landcell((uint)blockCellID);
if (_cell == null)
{
continue;
}
cells.Add(_cell);
// does this outdoor cell contain a building?
// if so, add all of its cells
var landCell = _cell as LandCell;
if (landCell.has_building())
{
//Console.WriteLine($"Found building in cell {landCell.ID:X8}");
var buildingCells = landCell.Building.get_building_cells();
//Console.WriteLine("# cells: " + buildingCells.Count);
cells.AddRange(buildingCells);
}
}
}
return(cells);
}
public void ConstructPolygons(uint landblockID)
{
var lcoord = LandDefs.blockid_to_lcoord(landblockID).Value;
var polyNum = 1;
var seedA = (uint)((int)lcoord.X * LandDefs.VertexPerCell * 214614067);
var seedB = (uint)((int)lcoord.X * LandDefs.VertexPerCell * 1109124029);
var vertexCnt = 0;
for (var x = 0; x < SideCellCount; x++)
{
var lcoordX = lcoord.X + x;
var originY = 1;
var colVertexCnt = 0;
var originX = polyNum;
for (var y = 0; y < SideCellCount; y++)
{
var lcoordY = (int)lcoord.Y + y;
var magicB = seedB;
var magicA = seedA + 1813693831;
for (var i = 0; i < LandDefs.VertexPerCell; i++)
{
var idxI = vertexCnt + i;
var idxJ = colVertexCnt;
for (var j = 0; j < LandDefs.VertexPerCell; j++)
{
var splitDir = (uint)(((int)lcoord.Y * LandDefs.VertexPerCell + idxJ) * magicA - magicB - 1369149221);
var polyIdx = (LandDefs.VertexPerCell * i + j) * 2;
var cellIdx = x * SideCellCount + y;
var vertIdx = idxI * SideVertexCount + idxJ;
var firstVertex = (idxI * SidePolyCount + idxJ) * 2;
var nextVertIdx = (idxI + 1) * SideVertexCount + idxJ;
var lcell = (LandCell)LandCells[cellIdx];
if (splitDir * 2.3283064e-10 < 0.5f)
{
// 2 1---0
// | \ \ |
// | \ \ |
// 0---1 2
SWtoNEcut[cellIdx] = false;
lcell.Polygons[polyIdx] = AddPolygon(firstVertex, vertIdx, nextVertIdx, vertIdx + 1);
lcell.Polygons[polyIdx + 1] = AddPolygon(firstVertex + 1, nextVertIdx + 1, vertIdx + 1, nextVertIdx);
}
else
{
// 2 2---1
// / | | /
// / | | /
// 0---1 0
SWtoNEcut[cellIdx] = true;
lcell.Polygons[polyIdx] = AddPolygon(firstVertex, vertIdx, nextVertIdx, nextVertIdx + 1);
lcell.Polygons[polyIdx + 1] = AddPolygon(firstVertex + 1, vertIdx, nextVertIdx + 1, vertIdx + 1);
}
idxJ++;
}
magicA += 214614067;
magicB += 1109124029;
}
var cellID = (uint)LandDefs.lcoord_to_gid(lcoordX, lcoordY);
var landCell = LandCells[x * SideCellCount + y];
landCell.ID = cellID;
landCell.Pos.ObjCellID = cellID;
landCell.Pos.Frame.Origin.X = originX * LandDefs.HalfSquareLength;
landCell.Pos.Frame.Origin.Y = originY * LandDefs.HalfSquareLength;
originY += 2;
colVertexCnt += LandDefs.VertexPerCell;
}
vertexCnt += LandDefs.VertexPerCell;
seedB += 1109124029 * (uint)LandDefs.VertexPerCell;
seedA += 214614067 * (uint)LandDefs.VertexPerCell;
polyNum += 2;
}
}