Wizardry/src/main/java/electroblob/wizardry/entity/projectile/EntityIceCharge.java

package electroblob.wizardry.entity.projectile;

import java.util.List;

import electroblob.wizardry.Wizardry;
import electroblob.wizardry.registry.WizardryPotions;
import electroblob.wizardry.registry.WizardrySounds;
import electroblob.wizardry.util.MagicDamage;
import electroblob.wizardry.util.MagicDamage.DamageType;
import electroblob.wizardry.util.WizardryParticleType;
import electroblob.wizardry.util.WizardryUtilities;
import net.minecraft.entity.Entity;
import net.minecraft.entity.EntityLivingBase;
import net.minecraft.init.Blocks;
import net.minecraft.init.SoundEvents;
import net.minecraft.potion.PotionEffect;
import net.minecraft.util.EnumParticleTypes;
import net.minecraft.util.math.BlockPos;
import net.minecraft.util.math.RayTraceResult;
import net.minecraft.world.World;

public class EntityIceCharge extends EntityBomb {

	public EntityIceCharge(World par1World){
		super(par1World);
	}

	public EntityIceCharge(World par1World, EntityLivingBase par2EntityLivingBase){
		super(par1World, par2EntityLivingBase);
	}

	public EntityIceCharge(World par1World, EntityLivingBase par2EntityLivingBase, float damageMultiplier,
			float blastMultiplier){
		super(par1World, par2EntityLivingBase, damageMultiplier, blastMultiplier);
	}

	public EntityIceCharge(World par1World, double par2, double par4, double par6){
		super(par1World, par2, par4, par6);
	}

	/**
	 * Called when this EntityThrowable hits a block or entity.
	 */
	protected void onImpact(RayTraceResult par1RayTraceResult){
		Entity entityHit = par1RayTraceResult.entityHit;

		if(entityHit != null){
			// This is if the ice charge gets a direct hit
			float damage = 4 * damageMultiplier;

			entityHit.attackEntityFrom(
					MagicDamage.causeIndirectMagicDamage(this, this.getThrower(), DamageType.FROST).setProjectile(),
					damage);

			if(entityHit instanceof EntityLivingBase && !MagicDamage.isEntityImmune(DamageType.FROST, entityHit))
				((EntityLivingBase)entityHit).addPotionEffect(new PotionEffect(WizardryPotions.frost, 120, 1));
		}

		// Particle effect
		if(world.isRemote){
			this.world.spawnParticle(EnumParticleTypes.EXPLOSION_LARGE, this.posX, this.posY, this.posZ, 0, 0, 0);
			for(int i = 0; i < 30 * blastMultiplier; i++){
				float brightness = 0.4f + rand.nextFloat() * 0.5f;
				Wizardry.proxy.spawnParticle(WizardryParticleType.ICE, world,
						this.posX + (this.rand.nextDouble() * 4 - 2) * blastMultiplier,
						this.posY + (this.rand.nextDouble() * 4 - 2) * blastMultiplier,
						this.posZ + (this.rand.nextDouble() * 4 - 2) * blastMultiplier, 0.0d, 0.0d, 0.0d, 35);
				Wizardry.proxy.spawnParticle(WizardryParticleType.DARK_MAGIC, world,
						this.posX + (this.rand.nextDouble() * 4 - 2) * blastMultiplier,
						this.posY + (this.rand.nextDouble() * 4 - 2) * blastMultiplier,
						this.posZ + (this.rand.nextDouble() * 4 - 2) * blastMultiplier, 0.0d, 0.0d, 0.0d, 0, brightness,
						brightness + 0.1f, 1.0f);
			}
		}

		if(!this.world.isRemote){

			this.playSound(SoundEvents.ENTITY_SPLASH_POTION_BREAK, 1.5f, rand.nextFloat() * 0.4f + 0.6f);
			this.playSound(WizardrySounds.SPELL_ICE, 1.2f, rand.nextFloat() * 0.4f + 1.2f);

			double radius = 3.0d * blastMultiplier;

			List<EntityLivingBase> targets = WizardryUtilities.getEntitiesWithinRadius(radius, this.posX, this.posY,
					this.posZ, this.world);

			// Slows targets
			for(EntityLivingBase target : targets){
				if(target != entityHit && target != this.getThrower()){
					if(!MagicDamage.isEntityImmune(DamageType.FROST, target))
						target.addPotionEffect(new PotionEffect(WizardryPotions.frost, 100, 0));
				}
			}

			// Places snow and ice on ground.
			for(int i = -1; i < 2; i++){
				for(int j = -1; j < 2; j++){

					BlockPos pos = new BlockPos(this.posX + i, this.posY, this.posZ + j);

					int y = WizardryUtilities.getNearestFloorLevelB(world, pos, 7);

					pos = new BlockPos(pos.getX(), y, pos.getZ());

					double dist = this.getDistance(pos.getX(), pos.getY(), pos.getZ());

					// Randomised with weighting so that the nearer the block the more likely it is to be snowed.
					if(y != -1 && rand.nextInt((int)dist * 2 + 1) < 1 && dist < 2){
						if(world.getBlockState(pos.down()).getBlock() == Blocks.WATER){
							world.setBlockState(pos.down(), Blocks.ICE.getDefaultState());
						}else{
							// Don't need to check whether the block at pos can be replaced since getNearestFloorLevelB
							// only ever returns floors with air above them.
							world.setBlockState(pos, Blocks.SNOW_LAYER.getDefaultState());
						}
					}
				}
			}

			// Releases shards
			for(int i = 0; i < 10; i++){
				double dx = rand.nextDouble() - 0.5;
				double dy = rand.nextDouble() - 0.5;
				double dz = rand.nextDouble() - 0.5;
				EntityIceShard iceshard = new EntityIceShard(world, this.posX + dx, this.posY + dy, this.posZ + dz);
				iceshard.motionX = dx;
				iceshard.motionY = dy;
				iceshard.motionZ = dz;
				iceshard.setShootingEntity(this.getThrower());
				iceshard.damageMultiplier = this.damageMultiplier;
				world.spawnEntity(iceshard);
			}

			this.setDead();
		}
	}

	@Override
	public boolean canRenderOnFire(){
		return false;
	}
}