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Fix and rewrite contrails. Closes #3457.

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This commit is contained in:
Paul Chote
2013-06-24 21:07:51 +12:00
parent c886253738
commit 185e9b3f08
5 changed files with 130 additions and 75 deletions
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65
OpenRA.Mods.RA/Effects/Contrail.cs
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@@ -28,17 +28,18 @@ namespace OpenRA.Mods.RA
public object Create(ActorInitializer init) { return new Contrail(init.self, this); }
}
class Contrail : ITick, IPostRender
class Contrail : ITick, IRender
{
ContrailInfo info;
ContrailHistory history;
ContrailRenderable trail;
IBodyOrientation body;
public Contrail(Actor self, ContrailInfo info)
{
this.info = info;
history = new ContrailHistory(info.TrailLength,
info.UsePlayerColor ? ContrailHistory.ChooseColor(self) : info.Color);
var color = info.UsePlayerColor ? ContrailRenderable.ChooseColor(self) : info.Color;
trail = new ContrailRenderable(self.World, color, info.TrailLength, 0, 0);
body = self.Trait<IBodyOrientation>();
}
@@ -46,62 +47,12 @@ namespace OpenRA.Mods.RA
public void Tick(Actor self)
{
var local = info.Offset.Rotate(body.QuantizeOrientation(self, self.Orientation));
history.Tick(self.CenterPosition + body.LocalToWorld(local));
trail.Update(self.CenterPosition + body.LocalToWorld(local));
}
public void RenderAfterWorld(WorldRenderer wr, Actor self) { history.Render(wr, self); }
}
class ContrailHistory
{
List<WPos> positions = new List<WPos>();
readonly int TrailLength;
readonly Color Color;
readonly int StartSkip;
public static Color ChooseColor(Actor self)
public IEnumerable<IRenderable> Render(Actor self, WorldRenderer wr)
{
var ownerColor = Color.FromArgb(255, self.Owner.Color.RGB);
return Exts.ColorLerp(0.5f, ownerColor, Color.White);
}
public ContrailHistory(int trailLength, Color color)
: this(trailLength, color, 0) { }
public ContrailHistory(int trailLength, Color color, int startSkip)
{
this.TrailLength = trailLength;
this.Color = color;
this.StartSkip = startSkip;
}
public void Tick(WPos currentPos)
{
positions.Add(currentPos);
if (positions.Count >= TrailLength)
positions.RemoveAt(0);
}
public void Render(WorldRenderer wr, Actor self)
{
Color trailStart = Color;
Color trailEnd = Color.FromArgb(trailStart.A - 255 / TrailLength, trailStart.R, trailStart.G, trailStart.B);
for (int i = positions.Count - 1 - StartSkip; i >= 4; --i)
{
// World positions
var conPos = WPos.Average(positions[i], positions[i-1], positions[i-2], positions[i-3]);
var nextPos = WPos.Average(positions[i-1], positions[i-2], positions[i-3], positions[i-4]);
if (!self.World.FogObscures(new CPos(conPos)) &&
!self.World.FogObscures(new CPos(nextPos)))
{
Game.Renderer.WorldLineRenderer.DrawLine(wr.ScreenPosition(conPos), wr.ScreenPosition(nextPos), trailStart, trailEnd);
trailStart = trailEnd;
trailEnd = Color.FromArgb(trailStart.A - 255 / positions.Count, trailStart.R, trailStart.G, trailStart.B);
}
}
yield return trail;
}
}
}