87 lines
2.2 KiB
C#
Executable File
87 lines
2.2 KiB
C#
Executable File
using System;
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using System.Collections.Generic;
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using System.Linq;
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using System.Text;
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using OpenRa.Game.Graphics;
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namespace OpenRa.Game.Effects
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{
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class TeslaZap : IEffect
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{
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readonly int2 from, to;
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readonly Sequence tesla;
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int timeUntilRemove = 2; // # of frames
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public TeslaZap( int2 from, int2 to )
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{
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this.from = from;
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this.to = to;
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this.tesla = SequenceProvider.GetSequence( "litning", "bright" );
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}
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public void Tick()
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{
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if( timeUntilRemove <= 0 )
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Game.world.AddFrameEndTask( w => w.Remove( this ) );
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--timeUntilRemove;
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}
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public IEnumerable<Tuple<Sprite, float2, int>> Render()
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{
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if( from.X < to.X )
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return DrawZap( from, to, tesla );
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else if( from.X > to.X || from.Y > to.Y )
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return DrawZap( to, from, tesla );
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else
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return DrawZap( from, to, tesla );
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}
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static IEnumerable<Tuple<Sprite, float2, int>> DrawZap( int2 from, int2 to, Sequence tesla )
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{
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int2 d = to - from;
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if( d.X < 8 )
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{
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var prev = new int2( 0, 0 );
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var y = d.Y;
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while( y >= prev.Y + 8 )
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{
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yield return Tuple.New( tesla.GetSprite( 2 ), (float2)( from + prev - new int2( 0, 8 ) ), 0 );
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prev.Y += 8;
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}
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}
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else
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{
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var prev = new int2( 0, 0 );
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for( int i = 1 ; i < d.X ; i += 8 )
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{
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var y = i * d.Y / d.X;
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if( y <= prev.Y - 8 )
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{
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yield return Tuple.New( tesla.GetSprite( 3 ), (float2)( from + prev - new int2( 8, 16 ) ), 0 );
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prev.Y -= 8;
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while( y <= prev.Y - 8 )
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{
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yield return Tuple.New( tesla.GetSprite( 2 ), (float2)( from + prev - new int2( 0, 16 ) ), 0 );
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prev.Y -= 8;
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}
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}
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else if( y >= prev.Y + 8 )
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{
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yield return Tuple.New( tesla.GetSprite( 0 ), (float2)( from + prev - new int2( 8, 8 ) ), 0 );
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prev.Y += 8;
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while( y >= prev.Y + 8 )
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{
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yield return Tuple.New( tesla.GetSprite( 2 ), (float2)( from + prev - new int2( 0, 8 ) ), 0 );
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prev.Y += 8;
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}
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}
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else
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yield return Tuple.New( tesla.GetSprite( 1 ), (float2)( from + prev - new int2( 8, 8 ) ), 0 );
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prev.X += 8;
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}
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}
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}
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}
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}
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