127 lines
3.8 KiB
C#
Executable File
127 lines
3.8 KiB
C#
Executable File
#region Copyright & License Information
|
|
/*
|
|
* Copyright 2007,2009,2010 Chris Forbes, Robert Pepperell, Matthew Bowra-Dean, Paul Chote, Alli Witheford.
|
|
* This file is part of OpenRA.
|
|
*
|
|
* OpenRA is free software: you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation, either version 3 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* OpenRA is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with OpenRA. If not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
#endregion
|
|
|
|
using System;
|
|
using System.Drawing;
|
|
using System.Linq;
|
|
using OpenRA.Graphics;
|
|
|
|
namespace OpenRA.Traits
|
|
{
|
|
public static class Util
|
|
{
|
|
public static void TickFacing( ref int facing, int desiredFacing, int rot )
|
|
{
|
|
var leftTurn = ( facing - desiredFacing ) & 0xFF;
|
|
var rightTurn = ( desiredFacing - facing ) & 0xFF;
|
|
if( Math.Min( leftTurn, rightTurn ) < rot )
|
|
facing = desiredFacing & 0xFF;
|
|
else if( rightTurn < leftTurn )
|
|
facing = ( facing + rot ) & 0xFF;
|
|
else
|
|
facing = ( facing - rot ) & 0xFF;
|
|
}
|
|
|
|
static float2[] fvecs = Graphics.Util.MakeArray<float2>( 32,
|
|
i => -float2.FromAngle( i / 16.0f * (float)Math.PI ) * new float2( 1f, 1.3f ) );
|
|
|
|
public static int GetFacing( float2 d, int currentFacing )
|
|
{
|
|
if( float2.WithinEpsilon( d, float2.Zero, 0.001f ) )
|
|
return currentFacing;
|
|
|
|
int highest = -1;
|
|
float highestDot = -1.0f;
|
|
|
|
for( int i = 0 ; i < fvecs.Length ; i++ )
|
|
{
|
|
float dot = float2.Dot( fvecs[ i ], d );
|
|
if( dot > highestDot )
|
|
{
|
|
highestDot = dot;
|
|
highest = i;
|
|
}
|
|
}
|
|
|
|
return highest * 8;
|
|
}
|
|
|
|
public static int GetNearestFacing( int facing, int desiredFacing )
|
|
{
|
|
var turn = desiredFacing - facing;
|
|
if( turn > 128 )
|
|
turn -= 256;
|
|
if( turn < -128 )
|
|
turn += 256;
|
|
|
|
return facing + turn;
|
|
}
|
|
|
|
public static int QuantizeFacing(int facing, int numFrames)
|
|
{
|
|
var step = 256 / numFrames;
|
|
var a = (facing + step / 2) & 0xff;
|
|
return a / step;
|
|
}
|
|
|
|
public static float2 RotateVectorByFacing(float2 v, int facing, float ecc)
|
|
{
|
|
var angle = (facing / 256f) * (2 * (float)Math.PI);
|
|
var sinAngle = (float)Math.Sin(angle);
|
|
var cosAngle = (float)Math.Cos(angle);
|
|
|
|
return new float2(
|
|
(cosAngle * v.X + sinAngle * v.Y),
|
|
ecc * (cosAngle * v.Y - sinAngle * v.X));
|
|
}
|
|
|
|
public static float2 CenterOfCell(int2 loc)
|
|
{
|
|
return new float2(12, 12) + Game.CellSize * (float2)loc;
|
|
}
|
|
|
|
public static float2 BetweenCells(int2 from, int2 to)
|
|
{
|
|
return 0.5f * (CenterOfCell(from) + CenterOfCell(to));
|
|
}
|
|
|
|
public static int2 AsInt2(this int[] xs) { return new int2(xs[0], xs[1]); }
|
|
public static float2 RelOffset(this int[] offset) { return new float2(offset[0], offset[1]); }
|
|
public static float2 AbsOffset(this int[] offset) { return new float2(offset.ElementAtOrDefault(2), offset.ElementAtOrDefault(3)); }
|
|
|
|
public static Renderable Centered(Actor self, Sprite s, float2 location)
|
|
{
|
|
var pal = self.Owner == null ? "player0" : self.Owner.Palette;
|
|
var loc = location - 0.5f * s.size;
|
|
return new Renderable(s, loc.Round(), pal);
|
|
}
|
|
|
|
public static IActivity SequenceActivities(params IActivity[] acts)
|
|
{
|
|
return acts.Reverse().Aggregate(
|
|
(next, a) => { a.NextActivity = next; return a; });
|
|
}
|
|
|
|
public static Color ArrayToColor(int[] x) { return Color.FromArgb(x[0], x[1], x[2]); }
|
|
|
|
public static int2 CellContaining(float2 pos) { return (1f / Game.CellSize * pos).ToInt2(); }
|
|
}
|
|
}
|