Electroblob
69 lines
3.0 KiB
Java
69 lines
3.0 KiB
Java
package electroblob.wizardry.potion;
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import java.util.stream.Collectors;
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import net.minecraft.potion.PotionEffect;
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import net.minecraft.potion.PotionUtils;
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import net.minecraft.world.World;
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import net.minecraftforge.event.entity.living.LivingEvent.LivingUpdateEvent;
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import net.minecraftforge.event.entity.living.PotionColorCalculationEvent;
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import net.minecraftforge.fml.common.Mod;
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import net.minecraftforge.fml.common.eventhandler.SubscribeEvent;
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/**
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* Interface for potion effects that spawn custom particles instead of (or as well as) the vanilla 'swirly' particles.
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* To hide the vanilla 'swirly' particles, set the potion's liquid colour to 0 (black). By default, potions that implement
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* this interface no longer mix their colour with other potions.
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*
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* @author Electroblob
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* @since Wizardry 1.2
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*/
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@Mod.EventBusSubscriber
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public interface ICustomPotionParticles {
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/**
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* Called from the event handler to spawn a <b>single</b> custom potion particle. To get an instance of
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* <code>Random</code> inside this method, use <code>world.rand</code>.
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*
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* @param world The world to spawn the particle in.
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* @param x The x coordinate of the particle, already set to a random value within the entity's bounding box.
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* @param y The y coordinate of the particle, already set to a random value within the entity's bounding box.
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* @param z The z coordinate of the particle, already set to a random value within the entity's bounding box.
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*/
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void spawnCustomParticle(World world, double x, double y, double z);
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/** Returns true if this potion should mix its colour with others, false if not. Defaults to false. */
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default boolean shouldMixColour(){
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return false;
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}
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@SubscribeEvent
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public static void onLivingUpdateEvent(LivingUpdateEvent event){
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if(event.getEntityLiving().world.isRemote){
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// Behold the power of interfaces!
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for(PotionEffect effect : event.getEntityLiving().getActivePotionEffects()){
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if(effect.getPotion() instanceof ICustomPotionParticles && effect.doesShowParticles()){
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double x = event.getEntityLiving().posX
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+ (event.getEntityLiving().world.rand.nextDouble() - 0.5) * event.getEntityLiving().width;
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double y = event.getEntityLiving().getEntityBoundingBox().minY
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+ event.getEntityLiving().world.rand.nextDouble() * event.getEntityLiving().height;
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double z = event.getEntityLiving().posZ
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+ (event.getEntityLiving().world.rand.nextDouble() - 0.5) * event.getEntityLiving().width;
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((ICustomPotionParticles)effect.getPotion()).spawnCustomParticle(event.getEntityLiving().world, x, y, z);
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}
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}
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}
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}
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@SubscribeEvent
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// Prevents instances of this interface for which shouldMixColour() returns false from affecting mixed potion colours
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public static void onPotionColourCalculationEvent(PotionColorCalculationEvent event){
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event.setColor(PotionUtils.getPotionColorFromEffectList(event.getEffects().stream().filter(
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p -> !(p instanceof ICustomPotionParticles && !((ICustomPotionParticles)p).shouldMixColour()))
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.collect(Collectors.toList())));
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}
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}
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