001 package net.minecraft.entity.projectile;
002
003 import cpw.mods.fml.relauncher.Side;
004 import cpw.mods.fml.relauncher.SideOnly;
005 import java.util.List;
006 import net.minecraft.block.Block;
007 import net.minecraft.entity.Entity;
008 import net.minecraft.entity.EntityLiving;
009 import net.minecraft.entity.IProjectile;
010 import net.minecraft.entity.player.EntityPlayer;
011 import net.minecraft.nbt.NBTTagCompound;
012 import net.minecraft.util.AxisAlignedBB;
013 import net.minecraft.util.EnumMovingObjectType;
014 import net.minecraft.util.MathHelper;
015 import net.minecraft.util.MovingObjectPosition;
016 import net.minecraft.util.Vec3;
017 import net.minecraft.world.World;
018
019 public abstract class EntityThrowable extends Entity implements IProjectile
020 {
021 private int xTile = -1;
022 private int yTile = -1;
023 private int zTile = -1;
024 private int inTile = 0;
025 protected boolean inGround = false;
026 public int throwableShake = 0;
027
028 /**
029 * Is the entity that throws this 'thing' (snowball, ender pearl, eye of ender or potion)
030 */
031 private EntityLiving thrower;
032 private String throwerName = null;
033 private int ticksInGround;
034 private int ticksInAir = 0;
035
036 public EntityThrowable(World par1World)
037 {
038 super(par1World);
039 this.setSize(0.25F, 0.25F);
040 }
041
042 protected void entityInit() {}
043
044 @SideOnly(Side.CLIENT)
045
046 /**
047 * Checks if the entity is in range to render by using the past in distance and comparing it to its average edge
048 * length * 64 * renderDistanceWeight Args: distance
049 */
050 public boolean isInRangeToRenderDist(double par1)
051 {
052 double var3 = this.boundingBox.getAverageEdgeLength() * 4.0D;
053 var3 *= 64.0D;
054 return par1 < var3 * var3;
055 }
056
057 public EntityThrowable(World par1World, EntityLiving par2EntityLiving)
058 {
059 super(par1World);
060 this.thrower = par2EntityLiving;
061 this.setSize(0.25F, 0.25F);
062 this.setLocationAndAngles(par2EntityLiving.posX, par2EntityLiving.posY + (double)par2EntityLiving.getEyeHeight(), par2EntityLiving.posZ, par2EntityLiving.rotationYaw, par2EntityLiving.rotationPitch);
063 this.posX -= (double)(MathHelper.cos(this.rotationYaw / 180.0F * (float)Math.PI) * 0.16F);
064 this.posY -= 0.10000000149011612D;
065 this.posZ -= (double)(MathHelper.sin(this.rotationYaw / 180.0F * (float)Math.PI) * 0.16F);
066 this.setPosition(this.posX, this.posY, this.posZ);
067 this.yOffset = 0.0F;
068 float var3 = 0.4F;
069 this.motionX = (double)(-MathHelper.sin(this.rotationYaw / 180.0F * (float)Math.PI) * MathHelper.cos(this.rotationPitch / 180.0F * (float)Math.PI) * var3);
070 this.motionZ = (double)(MathHelper.cos(this.rotationYaw / 180.0F * (float)Math.PI) * MathHelper.cos(this.rotationPitch / 180.0F * (float)Math.PI) * var3);
071 this.motionY = (double)(-MathHelper.sin((this.rotationPitch + this.func_70183_g()) / 180.0F * (float)Math.PI) * var3);
072 this.setThrowableHeading(this.motionX, this.motionY, this.motionZ, this.func_70182_d(), 1.0F);
073 }
074
075 public EntityThrowable(World par1World, double par2, double par4, double par6)
076 {
077 super(par1World);
078 this.ticksInGround = 0;
079 this.setSize(0.25F, 0.25F);
080 this.setPosition(par2, par4, par6);
081 this.yOffset = 0.0F;
082 }
083
084 protected float func_70182_d()
085 {
086 return 1.5F;
087 }
088
089 protected float func_70183_g()
090 {
091 return 0.0F;
092 }
093
094 /**
095 * Similar to setArrowHeading, it's point the throwable entity to a x, y, z direction.
096 */
097 public void setThrowableHeading(double par1, double par3, double par5, float par7, float par8)
098 {
099 float var9 = MathHelper.sqrt_double(par1 * par1 + par3 * par3 + par5 * par5);
100 par1 /= (double)var9;
101 par3 /= (double)var9;
102 par5 /= (double)var9;
103 par1 += this.rand.nextGaussian() * 0.007499999832361937D * (double)par8;
104 par3 += this.rand.nextGaussian() * 0.007499999832361937D * (double)par8;
105 par5 += this.rand.nextGaussian() * 0.007499999832361937D * (double)par8;
106 par1 *= (double)par7;
107 par3 *= (double)par7;
108 par5 *= (double)par7;
109 this.motionX = par1;
110 this.motionY = par3;
111 this.motionZ = par5;
112 float var10 = MathHelper.sqrt_double(par1 * par1 + par5 * par5);
113 this.prevRotationYaw = this.rotationYaw = (float)(Math.atan2(par1, par5) * 180.0D / Math.PI);
114 this.prevRotationPitch = this.rotationPitch = (float)(Math.atan2(par3, (double)var10) * 180.0D / Math.PI);
115 this.ticksInGround = 0;
116 }
117
118 @SideOnly(Side.CLIENT)
119
120 /**
121 * Sets the velocity to the args. Args: x, y, z
122 */
123 public void setVelocity(double par1, double par3, double par5)
124 {
125 this.motionX = par1;
126 this.motionY = par3;
127 this.motionZ = par5;
128
129 if (this.prevRotationPitch == 0.0F && this.prevRotationYaw == 0.0F)
130 {
131 float var7 = MathHelper.sqrt_double(par1 * par1 + par5 * par5);
132 this.prevRotationYaw = this.rotationYaw = (float)(Math.atan2(par1, par5) * 180.0D / Math.PI);
133 this.prevRotationPitch = this.rotationPitch = (float)(Math.atan2(par3, (double)var7) * 180.0D / Math.PI);
134 }
135 }
136
137 /**
138 * Called to update the entity's position/logic.
139 */
140 public void onUpdate()
141 {
142 this.lastTickPosX = this.posX;
143 this.lastTickPosY = this.posY;
144 this.lastTickPosZ = this.posZ;
145 super.onUpdate();
146
147 if (this.throwableShake > 0)
148 {
149 --this.throwableShake;
150 }
151
152 if (this.inGround)
153 {
154 int var1 = this.worldObj.getBlockId(this.xTile, this.yTile, this.zTile);
155
156 if (var1 == this.inTile)
157 {
158 ++this.ticksInGround;
159
160 if (this.ticksInGround == 1200)
161 {
162 this.setDead();
163 }
164
165 return;
166 }
167
168 this.inGround = false;
169 this.motionX *= (double)(this.rand.nextFloat() * 0.2F);
170 this.motionY *= (double)(this.rand.nextFloat() * 0.2F);
171 this.motionZ *= (double)(this.rand.nextFloat() * 0.2F);
172 this.ticksInGround = 0;
173 this.ticksInAir = 0;
174 }
175 else
176 {
177 ++this.ticksInAir;
178 }
179
180 Vec3 var16 = this.worldObj.getWorldVec3Pool().getVecFromPool(this.posX, this.posY, this.posZ);
181 Vec3 var2 = this.worldObj.getWorldVec3Pool().getVecFromPool(this.posX + this.motionX, this.posY + this.motionY, this.posZ + this.motionZ);
182 MovingObjectPosition var3 = this.worldObj.rayTraceBlocks(var16, var2);
183 var16 = this.worldObj.getWorldVec3Pool().getVecFromPool(this.posX, this.posY, this.posZ);
184 var2 = this.worldObj.getWorldVec3Pool().getVecFromPool(this.posX + this.motionX, this.posY + this.motionY, this.posZ + this.motionZ);
185
186 if (var3 != null)
187 {
188 var2 = this.worldObj.getWorldVec3Pool().getVecFromPool(var3.hitVec.xCoord, var3.hitVec.yCoord, var3.hitVec.zCoord);
189 }
190
191 if (!this.worldObj.isRemote)
192 {
193 Entity var4 = null;
194 List var5 = this.worldObj.getEntitiesWithinAABBExcludingEntity(this, this.boundingBox.addCoord(this.motionX, this.motionY, this.motionZ).expand(1.0D, 1.0D, 1.0D));
195 double var6 = 0.0D;
196 EntityLiving var8 = this.getThrower();
197
198 for (int var9 = 0; var9 < var5.size(); ++var9)
199 {
200 Entity var10 = (Entity)var5.get(var9);
201
202 if (var10.canBeCollidedWith() && (var10 != var8 || this.ticksInAir >= 5))
203 {
204 float var11 = 0.3F;
205 AxisAlignedBB var12 = var10.boundingBox.expand((double)var11, (double)var11, (double)var11);
206 MovingObjectPosition var13 = var12.calculateIntercept(var16, var2);
207
208 if (var13 != null)
209 {
210 double var14 = var16.distanceTo(var13.hitVec);
211
212 if (var14 < var6 || var6 == 0.0D)
213 {
214 var4 = var10;
215 var6 = var14;
216 }
217 }
218 }
219 }
220
221 if (var4 != null)
222 {
223 var3 = new MovingObjectPosition(var4);
224 }
225 }
226
227 if (var3 != null)
228 {
229 if (var3.typeOfHit == EnumMovingObjectType.TILE && this.worldObj.getBlockId(var3.blockX, var3.blockY, var3.blockZ) == Block.portal.blockID)
230 {
231 this.setInPortal();
232 }
233 else
234 {
235 this.onImpact(var3);
236 }
237 }
238
239 this.posX += this.motionX;
240 this.posY += this.motionY;
241 this.posZ += this.motionZ;
242 float var17 = MathHelper.sqrt_double(this.motionX * this.motionX + this.motionZ * this.motionZ);
243 this.rotationYaw = (float)(Math.atan2(this.motionX, this.motionZ) * 180.0D / Math.PI);
244
245 for (this.rotationPitch = (float)(Math.atan2(this.motionY, (double)var17) * 180.0D / Math.PI); this.rotationPitch - this.prevRotationPitch < -180.0F; this.prevRotationPitch -= 360.0F)
246 {
247 ;
248 }
249
250 while (this.rotationPitch - this.prevRotationPitch >= 180.0F)
251 {
252 this.prevRotationPitch += 360.0F;
253 }
254
255 while (this.rotationYaw - this.prevRotationYaw < -180.0F)
256 {
257 this.prevRotationYaw -= 360.0F;
258 }
259
260 while (this.rotationYaw - this.prevRotationYaw >= 180.0F)
261 {
262 this.prevRotationYaw += 360.0F;
263 }
264
265 this.rotationPitch = this.prevRotationPitch + (this.rotationPitch - this.prevRotationPitch) * 0.2F;
266 this.rotationYaw = this.prevRotationYaw + (this.rotationYaw - this.prevRotationYaw) * 0.2F;
267 float var18 = 0.99F;
268 float var19 = this.getGravityVelocity();
269
270 if (this.isInWater())
271 {
272 for (int var7 = 0; var7 < 4; ++var7)
273 {
274 float var20 = 0.25F;
275 this.worldObj.spawnParticle("bubble", this.posX - this.motionX * (double)var20, this.posY - this.motionY * (double)var20, this.posZ - this.motionZ * (double)var20, this.motionX, this.motionY, this.motionZ);
276 }
277
278 var18 = 0.8F;
279 }
280
281 this.motionX *= (double)var18;
282 this.motionY *= (double)var18;
283 this.motionZ *= (double)var18;
284 this.motionY -= (double)var19;
285 this.setPosition(this.posX, this.posY, this.posZ);
286 }
287
288 /**
289 * Gets the amount of gravity to apply to the thrown entity with each tick.
290 */
291 protected float getGravityVelocity()
292 {
293 return 0.03F;
294 }
295
296 /**
297 * Called when this EntityThrowable hits a block or entity.
298 */
299 protected abstract void onImpact(MovingObjectPosition var1);
300
301 /**
302 * (abstract) Protected helper method to write subclass entity data to NBT.
303 */
304 public void writeEntityToNBT(NBTTagCompound par1NBTTagCompound)
305 {
306 par1NBTTagCompound.setShort("xTile", (short)this.xTile);
307 par1NBTTagCompound.setShort("yTile", (short)this.yTile);
308 par1NBTTagCompound.setShort("zTile", (short)this.zTile);
309 par1NBTTagCompound.setByte("inTile", (byte)this.inTile);
310 par1NBTTagCompound.setByte("shake", (byte)this.throwableShake);
311 par1NBTTagCompound.setByte("inGround", (byte)(this.inGround ? 1 : 0));
312
313 if ((this.throwerName == null || this.throwerName.length() == 0) && this.thrower != null && this.thrower instanceof EntityPlayer)
314 {
315 this.throwerName = this.thrower.getEntityName();
316 }
317
318 par1NBTTagCompound.setString("ownerName", this.throwerName == null ? "" : this.throwerName);
319 }
320
321 /**
322 * (abstract) Protected helper method to read subclass entity data from NBT.
323 */
324 public void readEntityFromNBT(NBTTagCompound par1NBTTagCompound)
325 {
326 this.xTile = par1NBTTagCompound.getShort("xTile");
327 this.yTile = par1NBTTagCompound.getShort("yTile");
328 this.zTile = par1NBTTagCompound.getShort("zTile");
329 this.inTile = par1NBTTagCompound.getByte("inTile") & 255;
330 this.throwableShake = par1NBTTagCompound.getByte("shake") & 255;
331 this.inGround = par1NBTTagCompound.getByte("inGround") == 1;
332 this.throwerName = par1NBTTagCompound.getString("ownerName");
333
334 if (this.throwerName != null && this.throwerName.length() == 0)
335 {
336 this.throwerName = null;
337 }
338 }
339
340 @SideOnly(Side.CLIENT)
341 public float getShadowSize()
342 {
343 return 0.0F;
344 }
345
346 public EntityLiving getThrower()
347 {
348 if (this.thrower == null && this.throwerName != null && this.throwerName.length() > 0)
349 {
350 this.thrower = this.worldObj.getPlayerEntityByName(this.throwerName);
351 }
352
353 return this.thrower;
354 }
355 }