Files
OpenRA/OpenRA.Game/Graphics/Sequence.cs
2013-07-15 20:58:25 +12:00

111 lines
2.9 KiB
C#

#region Copyright & License Information
/*
* Copyright 2007-2011 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.Generic;
using System.Linq;
using OpenRA.FileFormats;
namespace OpenRA.Graphics
{
public class Sequence
{
readonly Sprite[] sprites;
readonly bool reverseFacings, transpose;
public readonly string Name;
public readonly int Start;
public readonly int Length;
public readonly int Stride;
public readonly int Facings;
public readonly int Tick;
public readonly int ZOffset;
public Sequence(string unit, string name, MiniYaml info)
{
var srcOverride = info.Value;
Name = name;
var d = info.NodesDict;
var offset = float2.Zero;
Start = int.Parse(d["Start"].Value);
if (d.ContainsKey("Offset"))
offset = FieldLoader.GetValue<float2>("Offset", d["Offset"].Value);
// Apply offset to each sprite in the sequence
// Different sequences may apply different offsets to the same frame
sprites = Game.modData.SpriteLoader.LoadAllSprites(srcOverride ?? unit).Select(
s => new Sprite(s.sheet, s.bounds, s.offset + offset, s.channel)).ToArray();
if (!d.ContainsKey("Length"))
Length = 1;
else if (d["Length"].Value == "*")
Length = sprites.Length - Start;
else
Length = int.Parse(d["Length"].Value);
if (d.ContainsKey("Stride"))
Stride = int.Parse(d["Stride"].Value);
else
Stride = Length;
if (d.ContainsKey("Facings"))
{
var f = int.Parse(d["Facings"].Value);
Facings = Math.Abs(f);
reverseFacings = f < 0;
}
else
Facings = 1;
if (d.ContainsKey("Tick"))
Tick = int.Parse(d["Tick"].Value);
else
Tick = 40;
if (d.ContainsKey("Transpose"))
transpose = bool.Parse(d["Transpose"].Value);
if (d.ContainsKey("ZOffset"))
ZOffset = int.Parse(d["ZOffset"].Value);
if (Length > Stride)
throw new InvalidOperationException(
"{0}: Sequence {1}.{2}: Length must be <= stride"
.F(info.Nodes[0].Location, unit, name));
if (Start < 0 || Start + Facings * Stride > sprites.Length)
throw new InvalidOperationException(
"{6}: Sequence {0}.{1} uses frames [{2}..{3}] of SHP `{4}`, but only 0..{5} actually exist"
.F(unit, name, Start, Start + Facings * Stride - 1, srcOverride ?? unit, sprites.Length - 1,
info.Nodes[0].Location));
}
public Sprite GetSprite(int frame)
{
return GetSprite(frame, 0);
}
public Sprite GetSprite(int frame, int facing)
{
var f = Traits.Util.QuantizeFacing(facing, Facings);
if (reverseFacings)
f = (Facings - f) % Facings;
int i = transpose ? (frame % Length) * Facings + f :
(f * Stride) + (frame % Length);
return sprites[Start + i];
}
}
}