Add a PotionRegistry to handle dynamic distribution and remapping of Potion IDs

src/test/java/net/minecraftforge/debug/PotionRegistryDebug.java

@@ -0,0 +1,88 @@
+package net.minecraftforge.debug;
+
+import gnu.trove.set.TIntSet;
+import gnu.trove.set.hash.TIntHashSet;
+
+import net.minecraft.client.Minecraft;
+import net.minecraft.client.gui.Gui;
+import net.minecraft.client.renderer.RenderHelper;
+import net.minecraft.client.renderer.Tessellator;
+import net.minecraft.client.renderer.WorldRenderer;
+import net.minecraft.client.renderer.texture.TextureAtlasSprite;
+import net.minecraft.client.renderer.texture.TextureMap;
+import net.minecraft.init.Blocks;
+import net.minecraft.item.ItemStack;
+import net.minecraft.potion.Potion;
+import net.minecraft.potion.PotionEffect;
+import net.minecraft.util.ResourceLocation;
+import net.minecraftforge.fml.common.Mod;
+import net.minecraftforge.fml.common.event.FMLPreInitializationEvent;
+
+import java.util.Random;
+
+@Mod(modid=PotionRegistryDebug.MODID)
+public class PotionRegistryDebug {
+  public static final String MODID = "ForgePotionRegistry";
+
+  @Mod.EventHandler
+  public void preInit(FMLPreInitializationEvent event) {
+    new PotionForge(new ResourceLocation("forge", "forge"), false, 0xff00ff); // test automatic id distribution
+    new PotionForge(200, new ResourceLocation("forge", "forgy"), true, 0x00ff00); // test that ids above 127 work
+
+    Random rand = new Random();
+    TIntSet taken = new TIntHashSet(100);
+    int ra = rand.nextInt(100) + 100;
+    taken.add(ra);
+
+    // a new potion with a random id so that forge has to remap it
+    new PotionForge(ra, new ResourceLocation("forge", "realRandomPotion"), false, 0x0000ff);
+
+    for(int i = 0; i < 20; i++) {
+      int r = rand.nextInt(200) + 35;
+      while(taken.contains(r))
+        r = rand.nextInt(200) + 35;
+      //r = 32+i;
+      taken.add(r);
+      // this potions will most likely not have the same IDs between server and client.
+      // The forge handshake on connect should fix this.
+      new PotionForge(r, new ResourceLocation("forge", "randomPotion" + r), false, 0xff00ff);
+    }
+  }
+
+  protected class PotionForge extends Potion {
+
+    public PotionForge(int potionID, ResourceLocation location, boolean badEffect, int potionColor) {
+      super(potionID, location, badEffect, potionColor);
+      setPotionName("potion." + location.getResourcePath());
+    }
+
+    protected PotionForge(ResourceLocation location, boolean badEffect, int potionColor) {
+      super(location, badEffect, potionColor);
+      setPotionName("potion." + location.getResourcePath());
+    }
+
+    @Override
+    public void renderInventoryEffect(int x, int y, PotionEffect effect, Minecraft mc) {
+      Potion potion = Potion.potionTypes[effect.getPotionID()];
+
+      mc.getTextureManager().bindTexture(TextureMap.locationBlocksTexture);
+      TextureAtlasSprite sprite = mc.getTextureMapBlocks().getAtlasSprite("minecraft:blocks/fire_layer_0");
+
+      x += 6;
+      y += 7;
+
+      int width = 18;
+      int height = width;
+/*
+      Tessellator tessellator = Tessellator.getInstance();
+      WorldRenderer worldrenderer = tessellator.getWorldRenderer();
+      worldrenderer.startDrawingQuads();
+      worldrenderer.setColorOpaque_I(potion.getLiquidColor());
+      worldrenderer.addVertexWithUV((double) x, (double) (y + height), 0.0D, sprite.getMinU(), sprite.getMaxV());
+      worldrenderer.addVertexWithUV((double)(x + width), (double)(y + height), 0.0D, sprite.getMaxU(), sprite.getMaxV());
+      worldrenderer.addVertexWithUV((double)(x + width), (double)y, 0.0D, sprite.getMaxU(), sprite.getMinV());
+      worldrenderer.addVertexWithUV((double)x, (double)y, 0.0D, sprite.getMinU(), sprite.getMinV());
+      tessellator.draw();*/
+    }
+  }
+}