151 lines
4.2 KiB
C#
Executable File
151 lines
4.2 KiB
C#
Executable File
#region Copyright & License Information
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/*
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* Copyright 2007-2010 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. For more information,
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* see LICENSE.
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*/
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#endregion
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using System;
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using System.Drawing;
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using System.Linq;
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using OpenRA.Graphics;
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using OpenRA.Support;
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using System.Collections.Generic;
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namespace OpenRA.Traits
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{
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public static class Util
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{
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public static int TickFacing( int facing, int desiredFacing, int rot )
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{
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var leftTurn = ( facing - desiredFacing ) & 0xFF;
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var rightTurn = ( desiredFacing - facing ) & 0xFF;
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if( Math.Min( leftTurn, rightTurn ) < rot )
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return desiredFacing & 0xFF;
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else if( rightTurn < leftTurn )
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return ( facing + rot ) & 0xFF;
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else
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return ( facing - rot ) & 0xFF;
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}
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static float2[] fvecs = Graphics.Util.MakeArray<float2>( 32,
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i => -float2.FromAngle( i / 16.0f * (float)Math.PI ) * new float2( 1f, 1.3f ) );
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public static int GetFacing( float2 d, int currentFacing )
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{
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if (float2.WithinEpsilon(d, float2.Zero, 0.001f))
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return currentFacing;
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int highest = -1;
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float highestDot = -1.0f;
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for( int i = 0 ; i < fvecs.Length ; i++ )
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{
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float dot = float2.Dot( fvecs[ i ], d );
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if( dot > highestDot )
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{
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highestDot = dot;
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highest = i;
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}
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}
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return highest * 8;
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}
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public static int GetNearestFacing( int facing, int desiredFacing )
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{
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var turn = desiredFacing - facing;
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if( turn > 128 )
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turn -= 256;
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if( turn < -128 )
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turn += 256;
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return facing + turn;
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}
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public static int QuantizeFacing(int facing, int numFrames)
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{
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var step = 256 / numFrames;
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var a = (facing + step / 2) & 0xff;
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return a / step;
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}
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public static float2 RotateVectorByFacing(float2 v, int facing, float ecc)
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{
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var angle = (facing / 256f) * (2 * (float)Math.PI);
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var sinAngle = (float)Math.Sin(angle);
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var cosAngle = (float)Math.Cos(angle);
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return new float2(
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(cosAngle * v.X + sinAngle * v.Y),
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ecc * (cosAngle * v.Y - sinAngle * v.X));
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}
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public static int2 CenterOfCell(int2 loc)
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{
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return new int2( Game.CellSize / 2, Game.CellSize / 2 ) + Game.CellSize * loc;
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}
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public static int2 BetweenCells(int2 from, int2 to)
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{
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return int2.Lerp( CenterOfCell( from ), CenterOfCell( to ), 1, 2 );
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}
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public static int2 AsInt2(this int[] xs) { return new int2(xs[0], xs[1]); }
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public static float2 RelOffset(this int[] offset) { return new float2(offset[0], offset[1]); }
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public static float2 AbsOffset(this int[] offset) { return new float2(offset.ElementAtOrDefault(2), offset.ElementAtOrDefault(3)); }
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public static Renderable Centered(Actor self, Sprite s, float2 location)
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{
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var pal = self.Owner == null ? "player0" : self.Owner.Palette;
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var loc = location - 0.5f * s.size;
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return new Renderable(s, loc.Round(), pal, (int)self.CenterLocation.Y);
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}
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public static IActivity SequenceActivities(params IActivity[] acts)
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{
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return acts.Reverse().Aggregate(
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(next, a) => { a.Queue( next ); return a; });
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}
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public static IActivity RunActivity( Actor self, IActivity act )
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{
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while( act != null )
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{
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var prev = act;
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var sw = new Stopwatch();
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act = act.Tick( self );
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var dt = sw.ElapsedTime();
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if(dt > Game.Settings.Debug.LongTickThreshold)
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Log.Write("perf", "[{2}] Activity: {0} ({1:0.000} ms)", prev, dt * 1000, Game.LocalTick);
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if( prev == act )
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break;
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}
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return act;
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}
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public static Color ArrayToColor(int[] x) { return Color.FromArgb(x[0], x[1], x[2]); }
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public static int2 CellContaining(float2 pos) { return (1f / Game.CellSize * pos).ToInt2(); }
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/* pretty crap */
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public static IEnumerable<T> Shuffle<T>(this IEnumerable<T> ts, Thirdparty.Random random)
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{
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var items = ts.ToList();
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while (items.Count > 0)
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{
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var t = items.Random(random);
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yield return t;
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items.Remove(t);
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}
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}
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}
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}
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