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Electroblob
2018-01-19 20:33:04 +00:00
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src/main/java/electroblob/wizardry/entity/projectile/EntityMagicArrow.java
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package electroblob.wizardry.entity.projectile;
import java.lang.ref.WeakReference;
import java.util.List;
import java.util.UUID;
import electroblob.wizardry.util.MagicDamage;
import electroblob.wizardry.util.MagicDamage.DamageType;
import electroblob.wizardry.util.WizardryUtilities;
import io.netty.buffer.ByteBuf;
import net.minecraft.block.Block;
import net.minecraft.block.material.Material;
import net.minecraft.block.state.IBlockState;
import net.minecraft.enchantment.EnchantmentHelper;
import net.minecraft.entity.Entity;
import net.minecraft.entity.EntityLivingBase;
import net.minecraft.entity.IProjectile;
import net.minecraft.entity.monster.EntityEnderman;
import net.minecraft.entity.player.EntityPlayer;
import net.minecraft.entity.player.EntityPlayerMP;
import net.minecraft.nbt.NBTTagCompound;
import net.minecraft.network.play.server.SPacketChangeGameState;
import net.minecraft.util.DamageSource;
import net.minecraft.util.EnumParticleTypes;
import net.minecraft.util.ResourceLocation;
import net.minecraft.util.math.AxisAlignedBB;
import net.minecraft.util.math.BlockPos;
import net.minecraft.util.math.MathHelper;
import net.minecraft.util.math.RayTraceResult;
import net.minecraft.util.math.Vec3d;
import net.minecraft.world.World;
import net.minecraftforge.fml.common.registry.IEntityAdditionalSpawnData;
import net.minecraftforge.fml.relauncher.Side;
import net.minecraftforge.fml.relauncher.SideOnly;
/** This class was copied from EntityArrow in the 1.7.10 update as part of the overhaul and major cleanup
* of the code for the projectiles. It provides a unifying superclass for all <b>directed</b> projectiles (i.e. not
* spherical stuff like snowballs), namely magic missile, ice shard, force arrow, lightning arrow and dart.
* All spherical projectiles should extend {@link EntityMagicProjectile}.
* <p>
* This class handles saving of the damage multiplier and all shared logic. Methods are provided which are
* triggered at useful points during the entity update cycle as well as a few getters for various properties.
* Override any of these to change the behaviour (no need to call super for any of them).
* @since Wizardry 1.0
* @author Electroblob
*/
public abstract class EntityMagicArrow extends Entity implements IProjectile, IEntityAdditionalSpawnData {
private int blockX = -1;
private int blockY = -1;
private int blockZ = -1;
/** The block the arrow is stuck in */
private IBlockState stuckInBlock;
/** The metadata of the block the arrow is stuck in */
private int inData;
private boolean inGround;
/** Seems to be some sort of timer for animating an arrow. */
public int arrowShake;
/** The owner of this arrow. */
private WeakReference<EntityLivingBase> shootingEntity;
/** The UUID of the caster. Note that this is only for loading purposes; during normal updates
* the actual entity instance is stored (so that getEntityByUUID is not called constantly),
* so this will not always be synced (this is why it is private). */
private UUID casterUUID;
int ticksInGround;
int ticksInAir;
/** The amount of knockback an arrow applies when it hits a mob. */
private int knockbackStrength;
/** The damage multiplier for the arrow. Normally this isn't set directly, since it can be done via the
* constructor. An exception is where other entities need to pass in their multipliers, e.g. ice charge. */
public float damageMultiplier = 1.0f;
/** Basic shell constructor. Should only be used by the client. */
public EntityMagicArrow(World world)
{
super(world);
this.setSize(0.5F, 0.5F);
}
/** Creates a projectile at position xyz in world, with no motion. Do not create a projectile with this
* constructor and then call setVelocity() as that method is, bizarrely, client-side only. */
public EntityMagicArrow(World world, double x, double y, double z)
{
super(world);
this.setSize(0.5F, 0.5F);
this.setPosition(x, y, z);
// yOffset was set to 0 here, but that has been replaced by getYOffset(), which returns 0 in Entity anyway.
}
/** Creates a projectile at the position of the caster, pointing at the given target. The trajectory seems to be altered
* slightly by a random amount determined by the aimingError parameter. For reference, skeletons set this to 10 on easy, 6 on
* normal and 2 on hard difficulty. */
public EntityMagicArrow(World world, EntityLivingBase caster, Entity target, float speed, float aimingError, float damageMultiplier)
{
super(world);
this.shootingEntity = new WeakReference<EntityLivingBase>(caster);
this.damageMultiplier = damageMultiplier;
this.posY = caster.posY + (double)caster.getEyeHeight() - 0.10000000149011612D;
double d0 = target.posX - caster.posX;
double d1 = this.doGravity() ? target.getEntityBoundingBox().minY + (double)(target.height / 3.0F) - this.posY
: target.getEntityBoundingBox().minY + (double)(target.height / 2.0F) - this.posY;
double d2 = target.posZ - caster.posZ;
double d3 = (double)MathHelper.sqrt_double(d0 * d0 + d2 * d2);
if (d3 >= 1.0E-7D)
{
float f2 = (float)(Math.atan2(d2, d0) * 180.0D / Math.PI) - 90.0F;
float f3 = (float)(-(Math.atan2(d1, d3) * 180.0D / Math.PI));
double d4 = d0 / d3;
double d5 = d2 / d3;
this.setLocationAndAngles(caster.posX + d4, this.posY, caster.posZ + d5, f2, f3);
// yOffset was set to 0 here, but that has been replaced by getYOffset(), which returns 0 in Entity anyway.
// f4 depends on the horizontal distance between the two entities and accounts for bullet drop,
// but of course if gravity is ignored this should be 0.
float bulletDropCompensation = this.doGravity() ? (float)d3 * 0.2F : 0;
this.setThrowableHeading(d0, d1 + (double)bulletDropCompensation, d2, speed, aimingError);
}
}
/** Creates a projectile pointing in the direction the caster is looking, with the given speed.
* <b>Use this constructor for normal, player-cast spells. */
public EntityMagicArrow(World world, EntityLivingBase caster, float speed, float damageMultiplier)
{
super(world);
this.shootingEntity = new WeakReference<EntityLivingBase>(caster);
this.damageMultiplier = damageMultiplier;
this.setSize(0.5F, 0.5F);
this.setLocationAndAngles(caster.posX, caster.posY + (double)caster.getEyeHeight(), caster.posZ, caster.rotationYaw, caster.rotationPitch);
this.posX -= (double)(MathHelper.cos(this.rotationYaw / 180.0F * (float)Math.PI) * 0.16F);
this.posY -= 0.10000000149011612D;
this.posZ -= (double)(MathHelper.sin(this.rotationYaw / 180.0F * (float)Math.PI) * 0.16F);
this.setPosition(this.posX, this.posY, this.posZ);
// yOffset was set to 0 here, but that has been replaced by getYOffset(), which returns 0 in Entity anyway.
this.motionX = (double)(-MathHelper.sin(this.rotationYaw / 180.0F * (float)Math.PI) * MathHelper.cos(this.rotationPitch / 180.0F * (float)Math.PI));
this.motionZ = (double)(MathHelper.cos(this.rotationYaw / 180.0F * (float)Math.PI) * MathHelper.cos(this.rotationPitch / 180.0F * (float)Math.PI));
this.motionY = (double)(-MathHelper.sin(this.rotationPitch / 180.0F * (float)Math.PI));
this.setThrowableHeading(this.motionX, this.motionY, this.motionZ, speed * 1.5F, 1.0F);
}
/** Subclasses must override this to set their own base damage. */
public abstract double getDamage();
/** Override this to specify the damage type dealt. Defaults to {@link DamageType#MAGIC}. */
public DamageType getDamageType(){
return DamageType.MAGIC;
}
/** Override this to disable gravity. Returns true by default. */
public boolean doGravity(){
return true;
}
/** Override this to disable deceleration (generally speaking, this isn't noticeable unless gravity
* is turned off). Returns true by default. */
public boolean doDeceleration(){
return true;
}
/** Override this to allow the projectile to pass through mobs intact (the onEntityHit method will
* still be called and damage will still be applied). Returns false by default. */
public boolean doOverpenetration(){
return false;
}
/**
* Similar to setArrowHeading, it's point the throwable entity to a x, y, z direction.
*/
public void setThrowableHeading(double x, double y, double z, float speed, float randomness)
{
float f2 = MathHelper.sqrt_double(x * x + y * y + z * z);
x /= (double)f2;
y /= (double)f2;
z /= (double)f2;
x += this.rand.nextGaussian() * (double)(this.rand.nextBoolean() ? -1 : 1) * 0.007499999832361937D * (double)randomness;
y += this.rand.nextGaussian() * (double)(this.rand.nextBoolean() ? -1 : 1) * 0.007499999832361937D * (double)randomness;
z += this.rand.nextGaussian() * (double)(this.rand.nextBoolean() ? -1 : 1) * 0.007499999832361937D * (double)randomness;
x *= (double)speed;
y *= (double)speed;
z *= (double)speed;
this.motionX = x;
this.motionY = y;
this.motionZ = z;
float f3 = MathHelper.sqrt_double(x * x + z * z);
this.prevRotationYaw = this.rotationYaw = (float)(Math.atan2(x, z) * 180.0D / Math.PI);
this.prevRotationPitch = this.rotationPitch = (float)(Math.atan2(y, (double)f3) * 180.0D / Math.PI);
this.ticksInGround = 0;
}
// There was an override for setPositionAndRotationDirect here, but it was exactly the same as the superclass
// method (in Entity), so it was removed since it was redundant.
/**
* Sets the velocity to the args. Args: x, y, z. THIS IS CLIENT SIDE ONLY! DO NOT USE IN COMMON OR SERVER CODE!
*/
@Override
@SideOnly(Side.CLIENT)
public void setVelocity(double p_70016_1_, double p_70016_3_, double p_70016_5_)
{
this.motionX = p_70016_1_;
this.motionY = p_70016_3_;
this.motionZ = p_70016_5_;
if (this.prevRotationPitch == 0.0F && this.prevRotationYaw == 0.0F)
{
float f = MathHelper.sqrt_double(p_70016_1_ * p_70016_1_ + p_70016_5_ * p_70016_5_);
this.prevRotationYaw = this.rotationYaw = (float)(Math.atan2(p_70016_1_, p_70016_5_) * 180.0D / Math.PI);
this.prevRotationPitch = this.rotationPitch = (float)(Math.atan2(p_70016_3_, (double)f) * 180.0D / Math.PI);
this.prevRotationPitch = this.rotationPitch;
this.prevRotationYaw = this.rotationYaw;
this.setLocationAndAngles(this.posX, this.posY, this.posZ, this.rotationYaw, this.rotationPitch);
this.ticksInGround = 0;
}
}
/** Called each tick when the projectile is in a block. Defaults to setDead(), but can be overridden to
* change the behaviour. */
public void tickInGround(){
this.setDead();
}
/** Called each tick when the projectile is in the air. Override to add particles and such like. */
public void tickInAir(){}
/** Called when the projectile hits an entity. Override to add potion effects and such like. */
public void onEntityHit(EntityLivingBase entityHit){}
/** Called when the projectile hits a block. Override to add sound effects and such like. */
public void onBlockHit(){}
@Override
public void onUpdate(){
super.onUpdate();
if(this.getShootingEntity() == null && this.casterUUID != null){
Entity entity = WizardryUtilities.getEntityByUUID(worldObj, casterUUID);
if(entity instanceof EntityLivingBase){
this.shootingEntity = new WeakReference<EntityLivingBase>((EntityLivingBase)entity);
}
}
if (this.prevRotationPitch == 0.0F && this.prevRotationYaw == 0.0F)
{
float f = MathHelper.sqrt_double(this.motionX * this.motionX + this.motionZ * this.motionZ);
this.prevRotationYaw = this.rotationYaw = (float)(Math.atan2(this.motionX, this.motionZ) * 180.0D / Math.PI);
this.prevRotationPitch = this.rotationPitch = (float)(Math.atan2(this.motionY, (double)f) * 180.0D / Math.PI);
}
BlockPos blockpos = new BlockPos(this.blockX, this.blockY, this.blockZ);
IBlockState iblockstate = this.worldObj.getBlockState(blockpos);
if (iblockstate.getMaterial() != Material.AIR)
{
AxisAlignedBB axisalignedbb = iblockstate.getCollisionBoundingBox(this.worldObj, blockpos);
if (axisalignedbb != Block.NULL_AABB && axisalignedbb.offset(blockpos).isVecInside(new Vec3d(this.posX, this.posY, this.posZ)))
{
this.inGround = true;
}
}
if (this.arrowShake > 0)
{
--this.arrowShake;
}
// When the arrow is in the ground
if (this.inGround)
{
++this.ticksInGround;
this.tickInGround();
}
// When the arrow is in the air
else{
this.tickInAir();
this.ticksInGround = 0;
++this.ticksInAir;
Vec3d vec3d1 = new Vec3d(this.posX, this.posY, this.posZ);
Vec3d vec3d = new Vec3d(this.posX + this.motionX, this.posY + this.motionY, this.posZ + this.motionZ);
RayTraceResult raytraceresult = this.worldObj.rayTraceBlocks(vec3d1, vec3d, false, true, false);
vec3d1 = new Vec3d(this.posX, this.posY, this.posZ);
vec3d = new Vec3d(this.posX + this.motionX, this.posY + this.motionY, this.posZ + this.motionZ);
if (raytraceresult != null)
{
vec3d = new Vec3d(raytraceresult.hitVec.xCoord, raytraceresult.hitVec.yCoord, raytraceresult.hitVec.zCoord);
}
Entity entity = null;
List<?> list = this.worldObj.getEntitiesWithinAABBExcludingEntity(this, this.getEntityBoundingBox().addCoord(this.motionX, this.motionY, this.motionZ).expand(1.0D, 1.0D, 1.0D));
double d0 = 0.0D;
int i;
float f1;
for (i = 0; i < list.size(); ++i)
{
Entity entity1 = (Entity)list.get(i);
if (entity1.canBeCollidedWith() && (entity1 != this.getShootingEntity() || this.ticksInAir >= 5))
{
f1 = 0.3F;
AxisAlignedBB axisalignedbb1 = entity1.getEntityBoundingBox().expand((double)f1, (double)f1, (double)f1);
RayTraceResult RayTraceResult1 = axisalignedbb1.calculateIntercept(vec3d1, vec3d);
if (RayTraceResult1 != null)
{
double d1 = vec3d1.distanceTo(RayTraceResult1.hitVec);
if (d1 < d0 || d0 == 0.0D)
{
entity = entity1;
d0 = d1;
}
}
}
}
if (entity != null)
{
raytraceresult = new RayTraceResult(entity);
}
// Players that are considered invulnerable to the caster allow the projectile to pass straight through them.
if (raytraceresult != null && raytraceresult.entityHit != null && raytraceresult.entityHit instanceof EntityPlayer)
{
EntityPlayer entityplayer = (EntityPlayer)raytraceresult.entityHit;
if (entityplayer.capabilities.disableDamage || this.getShootingEntity() instanceof EntityPlayer && !((EntityPlayer)this.getShootingEntity()).canAttackPlayer(entityplayer))
{
raytraceresult = null;
}
}
// If the arrow hits something
if (raytraceresult != null)
{
// If the arrow hits an entity
if (raytraceresult.entityHit != null)
{
DamageSource damagesource = null;
if (this.getShootingEntity() == null)
{
damagesource = DamageSource.causeThrownDamage(this, this);
}
else
{
damagesource = MagicDamage.causeIndirectMagicDamage(this, (EntityLivingBase)this.getShootingEntity(), this.getDamageType()).setProjectile();
}
if (raytraceresult.entityHit.attackEntityFrom(damagesource, (float)(this.getDamage()*this.damageMultiplier)))
{
if (raytraceresult.entityHit instanceof EntityLivingBase)
{
EntityLivingBase entityHit = (EntityLivingBase)raytraceresult.entityHit;
this.onEntityHit(entityHit);
if (this.knockbackStrength > 0)
{
float f4 = MathHelper.sqrt_double(this.motionX * this.motionX + this.motionZ * this.motionZ);
if (f4 > 0.0F)
{
raytraceresult.entityHit.addVelocity(this.motionX * (double)this.knockbackStrength * 0.6000000238418579D / (double)f4, 0.1D, this.motionZ * (double)this.knockbackStrength * 0.6000000238418579D / (double)f4);
}
}
// Thorns enchantment
if (this.getShootingEntity() != null && this.getShootingEntity() instanceof EntityLivingBase)
{
EnchantmentHelper.applyThornEnchantments(entityHit, this.getShootingEntity());
EnchantmentHelper.applyArthropodEnchantments((EntityLivingBase)this.getShootingEntity(), entityHit);
}
if (this.getShootingEntity() != null && raytraceresult.entityHit != this.getShootingEntity() && raytraceresult.entityHit instanceof EntityPlayer && this.getShootingEntity() instanceof EntityPlayerMP)
{
((EntityPlayerMP)this.getShootingEntity()).connection.sendPacket(new SPacketChangeGameState(6, 0.0F));
}
}
if (!(raytraceresult.entityHit instanceof EntityEnderman) && !this.doOverpenetration())
{
this.setDead();
}
}
else
{
if(!this.doOverpenetration()) this.setDead();
// Was the 'rebound' that happened when entities were immune to damage
/*
this.motionX *= -0.10000000149011612D;
this.motionY *= -0.10000000149011612D;
this.motionZ *= -0.10000000149011612D;
this.rotationYaw += 180.0F;
this.prevRotationYaw += 180.0F;
this.ticksInAir = 0;
*/
}
}
// If the arrow hits a block
else
{
this.blockX = raytraceresult.getBlockPos().getX();
this.blockY = raytraceresult.getBlockPos().getY();
this.blockZ = raytraceresult.getBlockPos().getZ();
this.stuckInBlock = this.worldObj.getBlockState(raytraceresult.getBlockPos());
this.motionX = (double)((float)(raytraceresult.hitVec.xCoord - this.posX));
this.motionY = (double)((float)(raytraceresult.hitVec.yCoord - this.posY));
this.motionZ = (double)((float)(raytraceresult.hitVec.zCoord - this.posZ));
//f2 = MathHelper.sqrt_double(this.motionX * this.motionX + this.motionY * this.motionY + this.motionZ * this.motionZ);
//this.posX -= this.motionX / (double)f2 * 0.05000000074505806D;
//this.posY -= this.motionY / (double)f2 * 0.05000000074505806D;
//this.posZ -= this.motionZ / (double)f2 * 0.05000000074505806D;
//this.playSound("random.bowhit", 1.0F, 1.2F / (this.rand.nextFloat() * 0.2F + 0.9F));
this.inGround = true;
this.arrowShake = 7;
this.onBlockHit();
if (this.stuckInBlock.getMaterial() != Material.AIR)
{
this.stuckInBlock.getBlock().onEntityCollidedWithBlock(this.worldObj, raytraceresult.getBlockPos(), this.stuckInBlock, this);
}
}
}
this.posX += this.motionX;
this.posY += this.motionY;
this.posZ += this.motionZ;
//f2 = MathHelper.sqrt_double(this.motionX * this.motionX + this.motionZ * this.motionZ);
this.rotationYaw = (float)(Math.atan2(this.motionX, this.motionZ) * 180.0D / Math.PI);
//for (this.rotationPitch = (float)(Math.atan2(this.motionY, (double)f2) * 180.0D / Math.PI); this.rotationPitch - this.prevRotationPitch < -180.0F; this.prevRotationPitch -= 360.0F)
//{
// ;
//}
while (this.rotationPitch - this.prevRotationPitch >= 180.0F)
{
this.prevRotationPitch += 360.0F;
}
while (this.rotationYaw - this.prevRotationYaw < -180.0F)
{
this.prevRotationYaw -= 360.0F;
}
while (this.rotationYaw - this.prevRotationYaw >= 180.0F)
{
this.prevRotationYaw += 360.0F;
}
this.rotationPitch = this.prevRotationPitch + (this.rotationPitch - this.prevRotationPitch) * 0.2F;
this.rotationYaw = this.prevRotationYaw + (this.rotationYaw - this.prevRotationYaw) * 0.2F;
float f3 = 0.99F;
if (this.isInWater())
{
for (int l = 0; l < 4; ++l)
{
float f4 = 0.25F;
this.worldObj.spawnParticle(EnumParticleTypes.WATER_BUBBLE, this.posX - this.motionX * (double)f4, this.posY - this.motionY * (double)f4, this.posZ - this.motionZ * (double)f4, this.motionX, this.motionY, this.motionZ);
}
f3 = 0.8F;
}
if (this.isWet())
{
this.extinguish();
}
if(this.doDeceleration()){
this.motionX *= (double)f3;
this.motionY *= (double)f3;
this.motionZ *= (double)f3;
}
if(this.doGravity()) this.motionY -= 0.05;
this.setPosition(this.posX, this.posY, this.posZ);
this.doBlockCollisions();
}
}
@Override
public void writeEntityToNBT(NBTTagCompound tag)
{
tag.setShort("xTile", (short)this.blockX);
tag.setShort("yTile", (short)this.blockY);
tag.setShort("zTile", (short)this.blockZ);
tag.setShort("life", (short)this.ticksInGround);
if(this.stuckInBlock != null){
ResourceLocation resourcelocation = (ResourceLocation)Block.REGISTRY.getNameForObject(this.stuckInBlock.getBlock());
tag.setString("inTile", resourcelocation == null ? "" : resourcelocation.toString());
}
tag.setByte("inData", (byte)this.inData);
tag.setByte("shake", (byte)this.arrowShake);
tag.setByte("inGround", (byte)(this.inGround ? 1 : 0));
tag.setFloat("damageMultiplier", this.damageMultiplier);
if(this.getShootingEntity() != null){
tag.setUniqueId("casterUUID", this.getShootingEntity().getUniqueID());
}
}
@Override
public void readEntityFromNBT(NBTTagCompound tag)
{
this.blockX = tag.getShort("xTile");
this.blockY = tag.getShort("yTile");
this.blockZ = tag.getShort("zTile");
this.ticksInGround = tag.getShort("life");
// Commented out for now because there's some funny stuff going on with blockstates and metadata.
//this.stuckInBlock = Block.getBlockById(tag.getByte("inTile") & 255);
this.inData = tag.getByte("inData") & 255;
this.arrowShake = tag.getByte("shake") & 255;
this.inGround = tag.getByte("inGround") == 1;
this.damageMultiplier = tag.getFloat("damageMultiplier");
casterUUID = tag.getUniqueId("casterUUID");
}
/**
* returns if this entity triggers Block.onEntityWalking on the blocks they walk on. used for spiders and wolves to
* prevent them from trampling crops
*/
protected boolean canTriggerWalking()
{
return false;
}
@SideOnly(Side.CLIENT)
public float getShadowSize()
{
return 0.0F;
}
/**
* Sets the amount of knockback the arrow applies when it hits a mob.
*/
public void setKnockbackStrength(int p_70240_1_)
{
this.knockbackStrength = p_70240_1_;
}
/**
* If returns false, the item will not inflict any damage against entities.
*/
public boolean canAttackWithItem()
{
return false;
}
public void writeSpawnData(ByteBuf buffer){
if(this.getShootingEntity() != null) buffer.writeInt(this.getShootingEntity().getEntityId());
}
public void readSpawnData(ByteBuf buffer){
if(buffer.isReadable()) this.shootingEntity = new WeakReference<EntityLivingBase>((EntityLivingBase)this.worldObj.getEntityByID(buffer.readInt()));
}
/**
* Returns the EntityLivingBase that created this construct, or null if it no longer exists. Cases where the
* entity may no longer exist are: entity died or was deleted, mob despawned, player logged out, entity teleported
* to another dimension, or this construct simply had no caster in the first place.
*/
public EntityLivingBase getShootingEntity() {
return shootingEntity == null ? null : shootingEntity.get();
}
public void setShootingEntity(EntityLivingBase entity) {
shootingEntity = new WeakReference<EntityLivingBase>(entity);
}
}