001 package net.minecraft.src;
002
003 import cpw.mods.fml.common.Side;
004 import cpw.mods.fml.common.asm.SideOnly;
005 import java.util.Iterator;
006 import java.util.List;
007
008 public abstract class EntityThrowable extends Entity implements IProjectile
009 {
010 private int xTile = -1;
011 private int yTile = -1;
012 private int zTile = -1;
013 private int inTile = 0;
014 protected boolean inGround = false;
015 public int throwableShake = 0;
016
017 /**
018 * Is the entity that throws this 'thing' (snowball, ender pearl, eye of ender or potion)
019 */
020 protected EntityLiving thrower;
021 private int ticksInGround;
022 private int ticksInAir = 0;
023
024 public EntityThrowable(World par1World)
025 {
026 super(par1World);
027 this.setSize(0.25F, 0.25F);
028 }
029
030 protected void entityInit() {}
031
032 @SideOnly(Side.CLIENT)
033
034 /**
035 * Checks if the entity is in range to render by using the past in distance and comparing it to its average edge
036 * length * 64 * renderDistanceWeight Args: distance
037 */
038 public boolean isInRangeToRenderDist(double par1)
039 {
040 double var3 = this.boundingBox.getAverageEdgeLength() * 4.0D;
041 var3 *= 64.0D;
042 return par1 < var3 * var3;
043 }
044
045 public EntityThrowable(World par1World, EntityLiving par2EntityLiving)
046 {
047 super(par1World);
048 this.thrower = par2EntityLiving;
049 this.setSize(0.25F, 0.25F);
050 this.setLocationAndAngles(par2EntityLiving.posX, par2EntityLiving.posY + (double)par2EntityLiving.getEyeHeight(), par2EntityLiving.posZ, par2EntityLiving.rotationYaw, par2EntityLiving.rotationPitch);
051 this.posX -= (double)(MathHelper.cos(this.rotationYaw / 180.0F * (float)Math.PI) * 0.16F);
052 this.posY -= 0.10000000149011612D;
053 this.posZ -= (double)(MathHelper.sin(this.rotationYaw / 180.0F * (float)Math.PI) * 0.16F);
054 this.setPosition(this.posX, this.posY, this.posZ);
055 this.yOffset = 0.0F;
056 float var3 = 0.4F;
057 this.motionX = (double)(-MathHelper.sin(this.rotationYaw / 180.0F * (float)Math.PI) * MathHelper.cos(this.rotationPitch / 180.0F * (float)Math.PI) * var3);
058 this.motionZ = (double)(MathHelper.cos(this.rotationYaw / 180.0F * (float)Math.PI) * MathHelper.cos(this.rotationPitch / 180.0F * (float)Math.PI) * var3);
059 this.motionY = (double)(-MathHelper.sin((this.rotationPitch + this.func_70183_g()) / 180.0F * (float)Math.PI) * var3);
060 this.setThrowableHeading(this.motionX, this.motionY, this.motionZ, this.func_70182_d(), 1.0F);
061 }
062
063 public EntityThrowable(World par1World, double par2, double par4, double par6)
064 {
065 super(par1World);
066 this.ticksInGround = 0;
067 this.setSize(0.25F, 0.25F);
068 this.setPosition(par2, par4, par6);
069 this.yOffset = 0.0F;
070 }
071
072 protected float func_70182_d()
073 {
074 return 1.5F;
075 }
076
077 protected float func_70183_g()
078 {
079 return 0.0F;
080 }
081
082 /**
083 * Similar to setArrowHeading, it's point the throwable entity to a x, y, z direction.
084 */
085 public void setThrowableHeading(double par1, double par3, double par5, float par7, float par8)
086 {
087 float var9 = MathHelper.sqrt_double(par1 * par1 + par3 * par3 + par5 * par5);
088 par1 /= (double)var9;
089 par3 /= (double)var9;
090 par5 /= (double)var9;
091 par1 += this.rand.nextGaussian() * 0.007499999832361937D * (double)par8;
092 par3 += this.rand.nextGaussian() * 0.007499999832361937D * (double)par8;
093 par5 += this.rand.nextGaussian() * 0.007499999832361937D * (double)par8;
094 par1 *= (double)par7;
095 par3 *= (double)par7;
096 par5 *= (double)par7;
097 this.motionX = par1;
098 this.motionY = par3;
099 this.motionZ = par5;
100 float var10 = MathHelper.sqrt_double(par1 * par1 + par5 * par5);
101 this.prevRotationYaw = this.rotationYaw = (float)(Math.atan2(par1, par5) * 180.0D / Math.PI);
102 this.prevRotationPitch = this.rotationPitch = (float)(Math.atan2(par3, (double)var10) * 180.0D / Math.PI);
103 this.ticksInGround = 0;
104 }
105
106 @SideOnly(Side.CLIENT)
107
108 /**
109 * Sets the velocity to the args. Args: x, y, z
110 */
111 public void setVelocity(double par1, double par3, double par5)
112 {
113 this.motionX = par1;
114 this.motionY = par3;
115 this.motionZ = par5;
116
117 if (this.prevRotationPitch == 0.0F && this.prevRotationYaw == 0.0F)
118 {
119 float var7 = MathHelper.sqrt_double(par1 * par1 + par5 * par5);
120 this.prevRotationYaw = this.rotationYaw = (float)(Math.atan2(par1, par5) * 180.0D / Math.PI);
121 this.prevRotationPitch = this.rotationPitch = (float)(Math.atan2(par3, (double)var7) * 180.0D / Math.PI);
122 }
123 }
124
125 /**
126 * Called to update the entity's position/logic.
127 */
128 public void onUpdate()
129 {
130 this.lastTickPosX = this.posX;
131 this.lastTickPosY = this.posY;
132 this.lastTickPosZ = this.posZ;
133 super.onUpdate();
134
135 if (this.throwableShake > 0)
136 {
137 --this.throwableShake;
138 }
139
140 if (this.inGround)
141 {
142 int var1 = this.worldObj.getBlockId(this.xTile, this.yTile, this.zTile);
143
144 if (var1 == this.inTile)
145 {
146 ++this.ticksInGround;
147
148 if (this.ticksInGround == 1200)
149 {
150 this.setDead();
151 }
152
153 return;
154 }
155
156 this.inGround = false;
157 this.motionX *= (double)(this.rand.nextFloat() * 0.2F);
158 this.motionY *= (double)(this.rand.nextFloat() * 0.2F);
159 this.motionZ *= (double)(this.rand.nextFloat() * 0.2F);
160 this.ticksInGround = 0;
161 this.ticksInAir = 0;
162 }
163 else
164 {
165 ++this.ticksInAir;
166 }
167
168 Vec3 var15 = this.worldObj.getWorldVec3Pool().getVecFromPool(this.posX, this.posY, this.posZ);
169 Vec3 var2 = this.worldObj.getWorldVec3Pool().getVecFromPool(this.posX + this.motionX, this.posY + this.motionY, this.posZ + this.motionZ);
170 MovingObjectPosition var3 = this.worldObj.rayTraceBlocks(var15, var2);
171 var15 = this.worldObj.getWorldVec3Pool().getVecFromPool(this.posX, this.posY, this.posZ);
172 var2 = this.worldObj.getWorldVec3Pool().getVecFromPool(this.posX + this.motionX, this.posY + this.motionY, this.posZ + this.motionZ);
173
174 if (var3 != null)
175 {
176 var2 = this.worldObj.getWorldVec3Pool().getVecFromPool(var3.hitVec.xCoord, var3.hitVec.yCoord, var3.hitVec.zCoord);
177 }
178
179 if (!this.worldObj.isRemote)
180 {
181 Entity var4 = null;
182 List var5 = this.worldObj.getEntitiesWithinAABBExcludingEntity(this, this.boundingBox.addCoord(this.motionX, this.motionY, this.motionZ).expand(1.0D, 1.0D, 1.0D));
183 double var6 = 0.0D;
184 Iterator var8 = var5.iterator();
185
186 while (var8.hasNext())
187 {
188 Entity var9 = (Entity)var8.next();
189
190 if (var9.canBeCollidedWith() && (var9 != this.thrower || this.ticksInAir >= 5))
191 {
192 float var10 = 0.3F;
193 AxisAlignedBB var11 = var9.boundingBox.expand((double)var10, (double)var10, (double)var10);
194 MovingObjectPosition var12 = var11.calculateIntercept(var15, var2);
195
196 if (var12 != null)
197 {
198 double var13 = var15.distanceTo(var12.hitVec);
199
200 if (var13 < var6 || var6 == 0.0D)
201 {
202 var4 = var9;
203 var6 = var13;
204 }
205 }
206 }
207 }
208
209 if (var4 != null)
210 {
211 var3 = new MovingObjectPosition(var4);
212 }
213 }
214
215 if (var3 != null)
216 {
217 if (var3.typeOfHit == EnumMovingObjectType.TILE && this.worldObj.getBlockId(var3.blockX, var3.blockY, var3.blockZ) == Block.portal.blockID)
218 {
219 this.setInPortal();
220 }
221 else
222 {
223 this.onImpact(var3);
224 }
225 }
226
227 this.posX += this.motionX;
228 this.posY += this.motionY;
229 this.posZ += this.motionZ;
230 float var16 = MathHelper.sqrt_double(this.motionX * this.motionX + this.motionZ * this.motionZ);
231 this.rotationYaw = (float)(Math.atan2(this.motionX, this.motionZ) * 180.0D / Math.PI);
232
233 for (this.rotationPitch = (float)(Math.atan2(this.motionY, (double)var16) * 180.0D / Math.PI); this.rotationPitch - this.prevRotationPitch < -180.0F; this.prevRotationPitch -= 360.0F)
234 {
235 ;
236 }
237
238 while (this.rotationPitch - this.prevRotationPitch >= 180.0F)
239 {
240 this.prevRotationPitch += 360.0F;
241 }
242
243 while (this.rotationYaw - this.prevRotationYaw < -180.0F)
244 {
245 this.prevRotationYaw -= 360.0F;
246 }
247
248 while (this.rotationYaw - this.prevRotationYaw >= 180.0F)
249 {
250 this.prevRotationYaw += 360.0F;
251 }
252
253 this.rotationPitch = this.prevRotationPitch + (this.rotationPitch - this.prevRotationPitch) * 0.2F;
254 this.rotationYaw = this.prevRotationYaw + (this.rotationYaw - this.prevRotationYaw) * 0.2F;
255 float var17 = 0.99F;
256 float var18 = this.getGravityVelocity();
257
258 if (this.isInWater())
259 {
260 for (int var7 = 0; var7 < 4; ++var7)
261 {
262 float var19 = 0.25F;
263 this.worldObj.spawnParticle("bubble", this.posX - this.motionX * (double)var19, this.posY - this.motionY * (double)var19, this.posZ - this.motionZ * (double)var19, this.motionX, this.motionY, this.motionZ);
264 }
265
266 var17 = 0.8F;
267 }
268
269 this.motionX *= (double)var17;
270 this.motionY *= (double)var17;
271 this.motionZ *= (double)var17;
272 this.motionY -= (double)var18;
273 this.setPosition(this.posX, this.posY, this.posZ);
274 }
275
276 /**
277 * Gets the amount of gravity to apply to the thrown entity with each tick.
278 */
279 protected float getGravityVelocity()
280 {
281 return 0.03F;
282 }
283
284 /**
285 * Called when this EntityThrowable hits a block or entity.
286 */
287 protected abstract void onImpact(MovingObjectPosition var1);
288
289 /**
290 * (abstract) Protected helper method to write subclass entity data to NBT.
291 */
292 public void writeEntityToNBT(NBTTagCompound par1NBTTagCompound)
293 {
294 par1NBTTagCompound.setShort("xTile", (short)this.xTile);
295 par1NBTTagCompound.setShort("yTile", (short)this.yTile);
296 par1NBTTagCompound.setShort("zTile", (short)this.zTile);
297 par1NBTTagCompound.setByte("inTile", (byte)this.inTile);
298 par1NBTTagCompound.setByte("shake", (byte)this.throwableShake);
299 par1NBTTagCompound.setByte("inGround", (byte)(this.inGround ? 1 : 0));
300 }
301
302 /**
303 * (abstract) Protected helper method to read subclass entity data from NBT.
304 */
305 public void readEntityFromNBT(NBTTagCompound par1NBTTagCompound)
306 {
307 this.xTile = par1NBTTagCompound.getShort("xTile");
308 this.yTile = par1NBTTagCompound.getShort("yTile");
309 this.zTile = par1NBTTagCompound.getShort("zTile");
310 this.inTile = par1NBTTagCompound.getByte("inTile") & 255;
311 this.throwableShake = par1NBTTagCompound.getByte("shake") & 255;
312 this.inGround = par1NBTTagCompound.getByte("inGround") == 1;
313 }
314
315 @SideOnly(Side.CLIENT)
316 public float getShadowSize()
317 {
318 return 0.0F;
319 }
320 }