73 lines
2.0 KiB
C#
73 lines
2.0 KiB
C#
#region Copyright & License Information
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/*
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* Copyright 2007,2009,2010 Chris Forbes, Robert Pepperell, Matthew Bowra-Dean, Paul Chote, Alli Witheford.
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* This file is part of OpenRA.
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*
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* OpenRA is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* OpenRA is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with OpenRA. If not, see <http://www.gnu.org/licenses/>.
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*/
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#endregion
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using System;
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using System.Collections.Generic;
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using System.Linq;
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using OpenRA.FileFormats;
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namespace OpenRA.Traits
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{
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class ScreenShakerInfo : ITraitInfo
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{
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public object Create( Actor self ) { return new ScreenShaker(); }
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}
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public class ScreenShaker : ITick
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{
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int ticks = 0;
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List<OpenRA.FileFormats.Tuple<int, float2, int>> shakeEffects = new List<OpenRA.FileFormats.Tuple<int, float2, int>>();
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public void Tick (Actor self)
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{
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Game.viewport.Scroll(getScrollOffset());
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shakeEffects.RemoveAll(t => t.a == ticks);
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ticks++;
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}
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public void AddEffect(int time, float2 position, int intensity)
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{
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shakeEffects.Add(OpenRA.FileFormats.Tuple.New(ticks + time, position, intensity));
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}
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public float2 getScrollOffset()
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{
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int xFreq = 4;
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int yFreq = 5;
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return GetIntensity() * new float2(
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(float) Math.Sin((ticks*2*Math.PI)/xFreq) ,
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(float) Math.Cos((ticks*2*Math.PI)/yFreq));
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}
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public float GetIntensity()
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{
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var cp = Game.viewport.Location
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+ .5f * new float2(Game.viewport.Width, Game.viewport.Height);
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var intensity = 24 * 24 * 100 * shakeEffects.Sum(
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e => e.c / (e.b - cp).LengthSquared);
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return Math.Min(intensity, 10);
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}
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}
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}
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