TextureWaterFlowFX.java

package codechicken.core.featurehack.mc;

import codechicken.lib.colour.ColourRGBA;
import codechicken.lib.render.TextureFX;
import net.minecraftforge.fml.relauncher.Side;
import net.minecraftforge.fml.relauncher.SideOnly;

@SideOnly(Side.CLIENT)
public class TextureWaterFlowFX extends TextureFX {
    protected float[] field_76880_g = new float[256];
    protected float[] field_76883_h = new float[256];
    protected float[] field_76884_i = new float[256];
    protected float[] field_76881_j = new float[256];
    private int tickCounter = 0;

    //shadow
    public int tileSizeBase = 16;
    public int tileSizeSquare = 256;
    public int tileSizeMask = 15;
    public int tileSizeSquareMask = 255;

    public TextureWaterFlowFX() {
        super(32, "water_flow_fx");
    }

    @Override
    public void setup() {
        super.setup();
        field_76880_g = new float[tileSizeSquare];
        field_76883_h = new float[tileSizeSquare];
        field_76884_i = new float[tileSizeSquare];
        field_76881_j = new float[tileSizeSquare];
        tickCounter = 0;
    }

    public void onTick() {
        ++this.tickCounter;
        int var1;
        int var2;
        float var3;
        int var5;
        int var6;

        for (var1 = 0; var1 < tileSizeBase; ++var1) {
            for (var2 = 0; var2 < tileSizeBase; ++var2) {
                var3 = 0.0F;

                for (int var4 = var2 - 2; var4 <= var2; ++var4) {
                    var5 = var1 & tileSizeMask;
                    var6 = var4 & tileSizeMask;
                    var3 += this.field_76880_g[var5 + var6 * tileSizeBase];
                }

                this.field_76883_h[var1 + var2 * tileSizeBase] = var3 / 3.2F + this.field_76884_i[var1 + var2 * tileSizeBase] * 0.8F;
            }
        }

        for (var1 = 0; var1 < tileSizeBase; ++var1) {
            for (var2 = 0; var2 < tileSizeBase; ++var2) {
                this.field_76884_i[var1 + var2 * tileSizeBase] += this.field_76881_j[var1 + var2 * tileSizeBase] * 0.05F;

                if (this.field_76884_i[var1 + var2 * tileSizeBase] < 0.0F) {
                    this.field_76884_i[var1 + var2 * tileSizeBase] = 0.0F;
                }

                this.field_76881_j[var1 + var2 * tileSizeBase] -= 0.3F;

                if (Math.random() < 0.2D) {
                    this.field_76881_j[var1 + var2 * tileSizeBase] = 0.5F;
                }
            }
        }

        float[] var12 = this.field_76883_h;
        this.field_76883_h = this.field_76880_g;
        this.field_76880_g = var12;

        for (var2 = 0; var2 < tileSizeSquare; ++var2) {
            var3 = this.field_76880_g[var2 - this.tickCounter * tileSizeBase & tileSizeSquareMask];

            if (var3 > 1.0F) {
                var3 = 1.0F;
            }

            if (var3 < 0.0F) {
                var3 = 0.0F;
            }

            float var13 = var3 * var3;
            var5 = (int) (32.0F + var13 * 32.0F);
            var6 = (int) (50.0F + var13 * 64.0F);
            int var7 = 255;
            int var8 = (int) (146.0F + var13 * 50.0F);

            if (this.anaglyphEnabled) {
                int var9 = (var5 * 30 + var6 * 59 + var7 * 11) / 100;
                int var10 = (var5 * 30 + var6 * 70) / 100;
                int var11 = (var5 * 30 + var7 * 70) / 100;
                var5 = var9;
                var6 = var10;
                var7 = var11;
            }

            int px = var2 & tileSizeMask;
            int py = var2 / tileSizeBase;
            writeColour(px, py, var5, var6, var7, var8);
            writeColour(px + 16, py, var5, var6, var7, var8);
            writeColour(px, py + 16, var5, var6, var7, var8);
            writeColour(px + 16, py + 16, var5, var6, var7, var8);
        }
    }

    private void writeColour(int px, int py, int var5, int var6, int var7, int var8) {
        imageData[py * 32 + px] = new ColourRGBA(var5, var6, var7, var8).argb();
    }
}