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refactored Average method in PPos

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This commit is contained in:
Sascha Biedermann
2013-03-19 19:58:30 +01:00
parent 021e1116b8
commit e562f8d2cc
2 changed files with 21 additions and 6 deletions
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21
OpenRA.Game/PPos.cs
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@@ -29,8 +29,6 @@ namespace OpenRA
public static explicit operator PVecInt(PPos a) { return new PVecInt(a.X, a.Y); }
public static explicit operator PVecFloat(PPos a) { return new PVecFloat(a.X, a.Y); }
public static PPos operator /(PPos a, int b) { return new PPos(a.X / b , a.Y / b); }
public static PPos operator +(PPos a, PPos b) { return new PPos(a.X + b.X, a.Y + b.Y); }
public static PPos operator +(PPos a, PVecInt b) { return new PPos(a.X + b.X, a.Y + b.Y); }
public static PVecInt operator -(PPos a, PPos b) { return new PVecInt(a.X - b.X, a.Y - b.Y); }
public static PPos operator -(PPos a, PVecInt b) { return new PPos(a.X - b.X, a.Y - b.Y); }
@@ -46,6 +44,25 @@ namespace OpenRA
return a + ((PVecInt)(b - a) * mul / div);
}
public static PPos Average(params PPos[] list)
{
if (list == null || list.Length == 0)
throw new ArgumentException("PPos: Cannot calculate average of empty list.");
var x = 0;
var y = 0;
foreach(var pos in list)
{
x += pos.X;
y += pos.Y;
}
x /= list.Length;
y /= list.Length;
return new PPos(x,y);
}
public float2 ToFloat2() { return new float2(X, Y); }
public int2 ToInt2() { return new int2(X, Y); }
public CPos ToCPos() { return new CPos((int)(1f / Game.CellSize * X), (int)(1f / Game.CellSize * Y)); }

6
OpenRA.Mods.RA/Effects/Contrail.cs
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@@ -88,10 +88,8 @@ namespace OpenRA.Mods.RA
for (int i = positions.Count - 1 - StartSkip; i >= 4; --i)
{
var conPos = positions[i] + positions[i-1] + positions[i-2] + positions[i-3];
conPos /= 4;
var nextPos = positions[i-1] + positions[i-2] + positions[i-3] + positions[i-4];
nextPos /= 4;
var conPos = PPos.Average(positions[i], positions[i-1], positions[i-2], positions[i-3]);
var nextPos = PPos.Average(positions[i-1], positions[i-2], positions[i-3], positions[i-4]);
if (self.World.RenderedShroud.IsVisible(conPos.ToCPos()) ||
self.World.RenderedShroud.IsVisible(nextPos.ToCPos()))