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Re-write potion init code to avoid clashes with other mods

This commit is contained in:
Cheeserolls 2015-06-18 00:20:11 +01:00
parent f9335e9a47
commit 01d6e2c16b
1 changed files with 53 additions and 32 deletions
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85
src/main/java/biomesoplenty/common/core/BOPPotions.java
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@ -1,49 +1,70 @@
package biomesoplenty.common.core;
import static biomesoplenty.api.content.BOPCPotions.*;
import static biomesoplenty.api.content.BOPCPotions.paralysis;
import static biomesoplenty.api.content.BOPCPotions.possession;
import java.lang.reflect.Field;
import java.lang.reflect.Modifier;
import net.minecraft.potion.Potion;
import org.apache.logging.log4j.Level;
import biomesoplenty.common.helpers.BOPReflectionHelper;
import biomesoplenty.common.potions.PotionParalysis;
import biomesoplenty.common.potions.PotionPossession;
import cpw.mods.fml.common.FMLCommonHandler;
import cpw.mods.fml.common.ObfuscationReflectionHelper;
import cpw.mods.fml.relauncher.ReflectionHelper;
public class BOPPotions
{
public static int potionOffset;
private static final int MAXNEWPOTIONS = 8;
public static void init()
{
extendPotionsArray();
intializePotions();
}
private static void extendPotionsArray()
{
FMLCommonHandler.instance().getFMLLogger().log(Level.INFO, "[BiomesOPlenty] Extending Potions Array.");
potionOffset = Potion.potionTypes.length;
Potion[] potionTypes = new Potion[potionOffset + MAXNEWPOTIONS];
System.arraycopy(Potion.potionTypes, 0, potionTypes, 0, potionOffset);
BOPReflectionHelper.setPrivateFinalValue(Potion.class, null, potionTypes, "potionTypes", "field_76425_a");
paralysis = new PotionParalysis(getSparePotionId(), true, 16767262).setPotionName("potion.paralysis");
possession = new PotionPossession(getSparePotionId(), true, 1280).setPotionName("potion.possession");
}
private static void intializePotions()
{
paralysis = new PotionParalysis(getNextID(), true, 16767262).setPotionName("potion.paralysis");
possession = new PotionPossession(getNextID(), true, 1280).setPotionName("potion.possession");
}
public static int getNextID()
{
return potionOffset++ - 1;
}
// gets the next free potion id
// will expand the potions array if necessary
public static int getSparePotionId()
{
// look for a free slot in the Potions array
// (note we start counting from 1 - vanilla MC doens't use ID 0, nor will we)
int n = Potion.potionTypes.length;
for (int i = 1; i < n; i++)
{
if (Potion.potionTypes[i] == null)
{
return i;
}
}
// if there isn't a free slot, we'll expand the array...
// things go wrong if you try and have more than 128 potions
if (n >= 128)
{
throw new RuntimeException("There are not enough spare potion IDs - Biomes O Plenty cannot create potions - you might have to remove some mods");
}
// create a new potionTypes array - one bigger than the previous, and copy the old potions into it
Potion[] expandedPotionTypes = new Potion[n + 1];
System.arraycopy(Potion.potionTypes, 0, expandedPotionTypes, 0, n);
// use reflection to replace Potion.potionTypes with our new expanded array
// note - need to specify both the obfuscated and de-obfuscated field names so that it works in dev and in the normal game
Field field = ReflectionHelper.findField(Potion.class, ObfuscationReflectionHelper.remapFieldNames(Potion.class.getName(), "potionTypes", "field_76425_a"));
try
{
Field modifiersField = Field.class.getDeclaredField("modifiers");
modifiersField.setAccessible(true);
modifiersField.setInt(field, field.getModifiers() & ~Modifier.FINAL);
field.set(null, expandedPotionTypes);
} catch (Exception e) {
throw new RuntimeException(e);
}
return n;
}
}