001    package net.minecraft.src;
002    
003    import cpw.mods.fml.client.FMLTextureFX;
004    import cpw.mods.fml.common.Side;
005    import cpw.mods.fml.common.asm.SideOnly;
006    import java.util.Random;
007    
008    @SideOnly(Side.CLIENT)
009    public class TexturePortalFX extends FMLTextureFX
010    {
011        /** Portal tick counter */
012        private int portalTickCounter = 0;
013    
014        /** Portal texture data */
015        private byte[][] portalTextureData;
016    
017        public TexturePortalFX()
018        {
019            super(Block.portal.blockIndexInTexture);
020            setup();
021        }
022    
023        @Override
024        public void setup()
025        {
026            super.setup();
027            portalTextureData = new byte[32][tileSizeSquare << 4];
028            Random var1 = new Random(100L);
029    
030            for (int var2 = 0; var2 < 32; ++var2)
031            {
032                for (int var3 = 0; var3 < tileSizeBase; ++var3)
033                {
034                    for (int var4 = 0; var4 < tileSizeBase; ++var4)
035                    {
036                        float var5 = 0.0F;
037                        int var6;
038    
039                        for (var6 = 0; var6 < 2; ++var6)
040                        {
041                            float var7 = (float)(var6 * tileSizeBase) * 0.5F;
042                            float var8 = (float)(var6 * tileSizeBase) * 0.5F;
043                            float var9 = ((float)var3 - var7) / (float)tileSizeBase * 2.0F;
044                            float var10 = ((float)var4 - var8) / (float)tileSizeBase * 2.0F;
045    
046                            if (var9 < -1.0F)
047                            {
048                                var9 += 2.0F;
049                            }
050    
051                            if (var9 >= 1.0F)
052                            {
053                                var9 -= 2.0F;
054                            }
055    
056                            if (var10 < -1.0F)
057                            {
058                                var10 += 2.0F;
059                            }
060    
061                            if (var10 >= 1.0F)
062                            {
063                                var10 -= 2.0F;
064                            }
065    
066                            float var11 = var9 * var9 + var10 * var10;
067                            float var12 = (float)Math.atan2((double)var10, (double)var9) + ((float)var2 / 32.0F * (float)Math.PI * 2.0F - var11 * 10.0F + (float)(var6 * 2)) * (float)(var6 * 2 - 1);
068                            var12 = (MathHelper.sin(var12) + 1.0F) / 2.0F;
069                            var12 /= var11 + 1.0F;
070                            var5 += var12 * 0.5F;
071                        }
072    
073                        var5 += var1.nextFloat() * 0.1F;
074                        var6 = (int)(var5 * 100.0F + 155.0F);
075                        int var13 = (int)(var5 * var5 * 200.0F + 55.0F);
076                        int var14 = (int)(var5 * var5 * var5 * var5 * 255.0F);
077                        int var15 = (int)(var5 * 100.0F + 155.0F);
078                        int var16 = var4 * tileSizeBase + var3;
079                        this.portalTextureData[var2][var16 * 4 + 0] = (byte)var13;
080                        this.portalTextureData[var2][var16 * 4 + 1] = (byte)var14;
081                        this.portalTextureData[var2][var16 * 4 + 2] = (byte)var6;
082                        this.portalTextureData[var2][var16 * 4 + 3] = (byte)var15;
083                    }
084                }
085            }
086        }
087    
088        public void onTick()
089        {
090            ++this.portalTickCounter;
091            byte[] var1 = this.portalTextureData[this.portalTickCounter & 31];
092    
093            for (int var2 = 0; var2 < tileSizeSquare; ++var2)
094            {
095                int var3 = var1[var2 * 4 + 0] & 255;
096                int var4 = var1[var2 * 4 + 1] & 255;
097                int var5 = var1[var2 * 4 + 2] & 255;
098                int var6 = var1[var2 * 4 + 3] & 255;
099    
100                if (this.anaglyphEnabled)
101                {
102                    int var7 = (var3 * 30 + var4 * 59 + var5 * 11) / 100;
103                    int var8 = (var3 * 30 + var4 * 70) / 100;
104                    int var9 = (var3 * 30 + var5 * 70) / 100;
105                    var3 = var7;
106                    var4 = var8;
107                    var5 = var9;
108                }
109    
110                this.imageData[var2 * 4 + 0] = (byte)var3;
111                this.imageData[var2 * 4 + 1] = (byte)var4;
112                this.imageData[var2 * 4 + 2] = (byte)var5;
113                this.imageData[var2 * 4 + 3] = (byte)var6;
114            }
115        }
116    }