69 lines
2.1 KiB
C#
69 lines
2.1 KiB
C#
#region Copyright & License Information
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/*
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* Copyright 2007-2020 The OpenRA Developers (see AUTHORS)
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* This file is part of OpenRA, which is free software. It is made
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* available to you under the terms of the GNU General Public License
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* as published by the Free Software Foundation, either version 3 of
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* the License, or (at your option) any later version. For more
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* information, see COPYING.
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*/
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#endregion
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namespace OpenRA.Mods.Cnc
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{
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public static class Util
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{
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// TD and RA used a nonlinear mapping between artwork frames and unit facings for units with 32 facings.
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// This table defines the exclusive maximum facing for the i'th sprite frame.
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// i.e. sprite frame 1 is used for facings 5-13, sprite frame 2 for 14-21, and so on.
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// Sprite frame 0 is used for facings smaller than 5 or larger than 249.
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static readonly int[] SpriteRanges =
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{
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5, 14, 22, 33, 39, 46, 53, 60,
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67, 74, 81, 88, 96, 104, 113, 122,
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133, 142, 151, 161, 167, 174, 181, 188,
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195, 202, 209, 216, 224, 232, 241, 250
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};
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// The actual facing associated with each sprite frame.
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static readonly int[] SpriteFacings =
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{
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0, 10, 18, 28, 36, 43, 50, 57,
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64, 71, 78, 85, 92, 100, 109, 118,
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128, 138, 147, 156, 164, 171, 178, 185,
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192, 199, 206, 213, 220, 228, 237, 246
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};
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/// <summary>
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/// Calculate the frame index (between 0..numFrames) that
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/// should be used for the given facing value, accounting
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/// for the non-linear facing mapping for sprites with 32 directions.
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/// </summary>
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public static int ClassicIndexFacing(int facing, int numFrames)
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{
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if (numFrames == 32)
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{
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for (var i = 0; i < SpriteRanges.Length; i++)
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if (facing < SpriteRanges[i])
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return i;
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return 0;
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}
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return Common.Util.IndexFacing(facing, numFrames);
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}
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/// <summary>
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/// Rounds the given facing value to the nearest quantized step,
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/// accounting for the non-linear facing mapping for sprites with 32 directions.
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/// </summary>
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public static int ClassicQuantizeFacing(int facing, int steps)
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{
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if (steps == 32)
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return SpriteFacings[ClassicIndexFacing(facing, steps)];
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return Common.Util.QuantizeFacing(facing, steps);
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}
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}
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}
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