113 lines
2.8 KiB
C#
113 lines
2.8 KiB
C#
#region Copyright & License Information
|
|
/*
|
|
* Copyright 2007-2014 The OpenRA Developers (see AUTHORS)
|
|
* This file is part of OpenRA, which is free software. It is made
|
|
* available to you under the terms of the GNU General Public License
|
|
* as published by the Free Software Foundation. For more information,
|
|
* see COPYING.
|
|
*/
|
|
#endregion
|
|
|
|
using System;
|
|
using System.Collections;
|
|
using System.Collections.Generic;
|
|
using System.Drawing;
|
|
using OpenRA.Graphics;
|
|
|
|
namespace OpenRA
|
|
{
|
|
// Represents a (on-screen) rectangular collection of tiles.
|
|
// TopLeft and BottomRight are inclusive
|
|
public class CellRegion : IEnumerable<CPos>
|
|
{
|
|
// Corners of the region
|
|
public readonly CPos TopLeft;
|
|
public readonly CPos BottomRight;
|
|
readonly TileShape shape;
|
|
|
|
// Corners in map coordinates
|
|
// These will only equal TopLeft and BottomRight for TileShape.Rectangular
|
|
readonly CPos mapTopLeft;
|
|
readonly CPos mapBottomRight;
|
|
|
|
public CellRegion(TileShape shape, CPos topLeft, CPos bottomRight)
|
|
{
|
|
this.shape = shape;
|
|
TopLeft = topLeft;
|
|
BottomRight = bottomRight;
|
|
|
|
mapTopLeft = Map.CellToMap(shape, TopLeft);
|
|
mapBottomRight = Map.CellToMap(shape, BottomRight);
|
|
}
|
|
|
|
/// <summary>Expand the specified region with an additional cordon. This may expand the region outside the map borders.</summary>
|
|
public static CellRegion Expand(CellRegion region, int cordon)
|
|
{
|
|
var offset = new CVec(cordon, cordon);
|
|
var tl = Map.MapToCell(region.shape, Map.CellToMap(region.shape, region.TopLeft) - offset);
|
|
var br = Map.MapToCell(region.shape, Map.CellToMap(region.shape, region.BottomRight) + offset);
|
|
|
|
return new CellRegion(region.shape, tl, br);
|
|
}
|
|
|
|
public bool Contains(CPos cell)
|
|
{
|
|
var uv = Map.CellToMap(shape, cell);
|
|
return uv.X >= mapTopLeft.X && uv.X <= mapBottomRight.X && uv.Y >= mapTopLeft.Y && uv.Y <= mapBottomRight.Y;
|
|
}
|
|
|
|
public IEnumerator<CPos> GetEnumerator()
|
|
{
|
|
return new CellRegionEnumerator(this);
|
|
}
|
|
|
|
IEnumerator IEnumerable.GetEnumerator()
|
|
{
|
|
return GetEnumerator();
|
|
}
|
|
|
|
class CellRegionEnumerator : IEnumerator<CPos>
|
|
{
|
|
readonly CellRegion r;
|
|
|
|
// Current position, in map coordinates
|
|
int u, v;
|
|
|
|
public CellRegionEnumerator(CellRegion region)
|
|
{
|
|
r = region;
|
|
Reset();
|
|
}
|
|
|
|
public bool MoveNext()
|
|
{
|
|
u += 1;
|
|
|
|
// Check for column overflow
|
|
if (u > r.mapBottomRight.X)
|
|
{
|
|
v += 1;
|
|
u = r.mapTopLeft.X;
|
|
|
|
// Check for row overflow
|
|
if (v > r.mapBottomRight.Y)
|
|
return false;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
public void Reset()
|
|
{
|
|
// Enumerator starts *before* the first element in the sequence.
|
|
u = r.mapTopLeft.X - 1;
|
|
v = r.mapTopLeft.Y;
|
|
}
|
|
|
|
public CPos Current { get { return Map.MapToCell(r.shape, new CPos(u, v)); } }
|
|
object IEnumerator.Current { get { return Current; } }
|
|
public void Dispose() { }
|
|
}
|
|
}
|
|
}
|