001package net.minecraft.client.renderer.texturefx;
002
003import cpw.mods.fml.client.FMLTextureFX;
004import cpw.mods.fml.relauncher.Side;
005import cpw.mods.fml.relauncher.SideOnly;
006import java.util.Random;
007import net.minecraft.block.Block;
008import net.minecraft.util.MathHelper;
009
010@SideOnly(Side.CLIENT)
011public class TexturePortalFX extends FMLTextureFX
012{
013    /** Portal tick counter */
014    private int portalTickCounter = 0;
015
016    /** Portal texture data */
017    private byte[][] portalTextureData;
018
019    public TexturePortalFX()
020    {
021        super(Block.portal.blockIndexInTexture);
022        setup();
023    }
024
025    @Override
026    public void setup()
027    {
028        super.setup();
029        portalTextureData = new byte[32][tileSizeSquare << 4];
030        Random var1 = new Random(100L);
031
032        for (int var2 = 0; var2 < 32; ++var2)
033        {
034            for (int var3 = 0; var3 < tileSizeBase; ++var3)
035            {
036                for (int var4 = 0; var4 < tileSizeBase; ++var4)
037                {
038                    float var5 = 0.0F;
039                    int var6;
040
041                    for (var6 = 0; var6 < 2; ++var6)
042                    {
043                        float var7 = (float)(var6 * tileSizeBase) * 0.5F;
044                        float var8 = (float)(var6 * tileSizeBase) * 0.5F;
045                        float var9 = ((float)var3 - var7) / (float)tileSizeBase * 2.0F;
046                        float var10 = ((float)var4 - var8) / (float)tileSizeBase * 2.0F;
047
048                        if (var9 < -1.0F)
049                        {
050                            var9 += 2.0F;
051                        }
052
053                        if (var9 >= 1.0F)
054                        {
055                            var9 -= 2.0F;
056                        }
057
058                        if (var10 < -1.0F)
059                        {
060                            var10 += 2.0F;
061                        }
062
063                        if (var10 >= 1.0F)
064                        {
065                            var10 -= 2.0F;
066                        }
067
068                        float var11 = var9 * var9 + var10 * var10;
069                        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);
070                        var12 = (MathHelper.sin(var12) + 1.0F) / 2.0F;
071                        var12 /= var11 + 1.0F;
072                        var5 += var12 * 0.5F;
073                    }
074
075                    var5 += var1.nextFloat() * 0.1F;
076                    var6 = (int)(var5 * 100.0F + 155.0F);
077                    int var13 = (int)(var5 * var5 * 200.0F + 55.0F);
078                    int var14 = (int)(var5 * var5 * var5 * var5 * 255.0F);
079                    int var15 = (int)(var5 * 100.0F + 155.0F);
080                    int var16 = var4 * tileSizeBase + var3;
081                    this.portalTextureData[var2][var16 * 4 + 0] = (byte)var13;
082                    this.portalTextureData[var2][var16 * 4 + 1] = (byte)var14;
083                    this.portalTextureData[var2][var16 * 4 + 2] = (byte)var6;
084                    this.portalTextureData[var2][var16 * 4 + 3] = (byte)var15;
085                }
086            }
087        }
088    }
089
090    public void onTick()
091    {
092        ++this.portalTickCounter;
093        byte[] var1 = this.portalTextureData[this.portalTickCounter & 31];
094
095        for (int var2 = 0; var2 < tileSizeSquare; ++var2)
096        {
097            int var3 = var1[var2 * 4 + 0] & 255;
098            int var4 = var1[var2 * 4 + 1] & 255;
099            int var5 = var1[var2 * 4 + 2] & 255;
100            int var6 = var1[var2 * 4 + 3] & 255;
101
102            if (this.anaglyphEnabled)
103            {
104                int var7 = (var3 * 30 + var4 * 59 + var5 * 11) / 100;
105                int var8 = (var3 * 30 + var4 * 70) / 100;
106                int var9 = (var3 * 30 + var5 * 70) / 100;
107                var3 = var7;
108                var4 = var8;
109                var5 = var9;
110            }
111
112            this.imageData[var2 * 4 + 0] = (byte)var3;
113            this.imageData[var2 * 4 + 1] = (byte)var4;
114            this.imageData[var2 * 4 + 2] = (byte)var5;
115            this.imageData[var2 * 4 + 3] = (byte)var6;
116        }
117    }
118}