TexturePortalFX.java

package net.minecraft.client.renderer.texturefx;

import cpw.mods.fml.client.FMLTextureFX;
import cpw.mods.fml.relauncher.Side;
import cpw.mods.fml.relauncher.SideOnly;
import java.util.Random;
import net.minecraft.block.Block;
import net.minecraft.util.MathHelper;

@SideOnly(Side.CLIENT)
public class TexturePortalFX extends FMLTextureFX
{
    /** Portal tick counter */
    private int portalTickCounter = 0;

    /** Portal texture data */
    private byte[][] portalTextureData;

    public TexturePortalFX()
    {
        super(Block.portal.blockIndexInTexture);
        setup();
    }

    @Override
    public void setup()
    {
        super.setup();
        portalTextureData = new byte[32][tileSizeSquare << 4];
        Random var1 = new Random(100L);

        for (int var2 = 0; var2 < 32; ++var2)
        {
            for (int var3 = 0; var3 < tileSizeBase; ++var3)
            {
                for (int var4 = 0; var4 < tileSizeBase; ++var4)
                {
                    float var5 = 0.0F;
                    int var6;

                    for (var6 = 0; var6 < 2; ++var6)
                    {
                        float var7 = (float)(var6 * tileSizeBase) * 0.5F;
                        float var8 = (float)(var6 * tileSizeBase) * 0.5F;
                        float var9 = ((float)var3 - var7) / (float)tileSizeBase * 2.0F;
                        float var10 = ((float)var4 - var8) / (float)tileSizeBase * 2.0F;

                        if (var9 < -1.0F)
                        {
                            var9 += 2.0F;
                        }

                        if (var9 >= 1.0F)
                        {
                            var9 -= 2.0F;
                        }

                        if (var10 < -1.0F)
                        {
                            var10 += 2.0F;
                        }

                        if (var10 >= 1.0F)
                        {
                            var10 -= 2.0F;
                        }

                        float var11 = var9 * var9 + var10 * var10;
                        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);
                        var12 = (MathHelper.sin(var12) + 1.0F) / 2.0F;
                        var12 /= var11 + 1.0F;
                        var5 += var12 * 0.5F;
                    }

                    var5 += var1.nextFloat() * 0.1F;
                    var6 = (int)(var5 * 100.0F + 155.0F);
                    int var13 = (int)(var5 * var5 * 200.0F + 55.0F);
                    int var14 = (int)(var5 * var5 * var5 * var5 * 255.0F);
                    int var15 = (int)(var5 * 100.0F + 155.0F);
                    int var16 = var4 * tileSizeBase + var3;
                    this.portalTextureData[var2][var16 * 4 + 0] = (byte)var13;
                    this.portalTextureData[var2][var16 * 4 + 1] = (byte)var14;
                    this.portalTextureData[var2][var16 * 4 + 2] = (byte)var6;
                    this.portalTextureData[var2][var16 * 4 + 3] = (byte)var15;
                }
            }
        }
    }

    public void onTick()
    {
        ++this.portalTickCounter;
        byte[] var1 = this.portalTextureData[this.portalTickCounter & 31];

        for (int var2 = 0; var2 < tileSizeSquare; ++var2)
        {
            int var3 = var1[var2 * 4 + 0] & 255;
            int var4 = var1[var2 * 4 + 1] & 255;
            int var5 = var1[var2 * 4 + 2] & 255;
            int var6 = var1[var2 * 4 + 3] & 255;

            if (this.anaglyphEnabled)
            {
                int var7 = (var3 * 30 + var4 * 59 + var5 * 11) / 100;
                int var8 = (var3 * 30 + var4 * 70) / 100;
                int var9 = (var3 * 30 + var5 * 70) / 100;
                var3 = var7;
                var4 = var8;
                var5 = var9;
            }

            this.imageData[var2 * 4 + 0] = (byte)var3;
            this.imageData[var2 * 4 + 1] = (byte)var4;
            this.imageData[var2 * 4 + 2] = (byte)var5;
            this.imageData[var2 * 4 + 3] = (byte)var6;
        }
    }
}