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        private EntityLiving thrower;
021        private String field_85053_h = null;
022        private int ticksInGround;
023        private int ticksInAir = 0;
024    
025        public EntityThrowable(World par1World)
026        {
027            super(par1World);
028            this.setSize(0.25F, 0.25F);
029        }
030    
031        protected void entityInit() {}
032    
033        @SideOnly(Side.CLIENT)
034    
035        /**
036         * Checks if the entity is in range to render by using the past in distance and comparing it to its average edge
037         * length * 64 * renderDistanceWeight Args: distance
038         */
039        public boolean isInRangeToRenderDist(double par1)
040        {
041            double var3 = this.boundingBox.getAverageEdgeLength() * 4.0D;
042            var3 *= 64.0D;
043            return par1 < var3 * var3;
044        }
045    
046        public EntityThrowable(World par1World, EntityLiving par2EntityLiving)
047        {
048            super(par1World);
049            this.thrower = par2EntityLiving;
050            this.setSize(0.25F, 0.25F);
051            this.setLocationAndAngles(par2EntityLiving.posX, par2EntityLiving.posY + (double)par2EntityLiving.getEyeHeight(), par2EntityLiving.posZ, par2EntityLiving.rotationYaw, par2EntityLiving.rotationPitch);
052            this.posX -= (double)(MathHelper.cos(this.rotationYaw / 180.0F * (float)Math.PI) * 0.16F);
053            this.posY -= 0.10000000149011612D;
054            this.posZ -= (double)(MathHelper.sin(this.rotationYaw / 180.0F * (float)Math.PI) * 0.16F);
055            this.setPosition(this.posX, this.posY, this.posZ);
056            this.yOffset = 0.0F;
057            float var3 = 0.4F;
058            this.motionX = (double)(-MathHelper.sin(this.rotationYaw / 180.0F * (float)Math.PI) * MathHelper.cos(this.rotationPitch / 180.0F * (float)Math.PI) * var3);
059            this.motionZ = (double)(MathHelper.cos(this.rotationYaw / 180.0F * (float)Math.PI) * MathHelper.cos(this.rotationPitch / 180.0F * (float)Math.PI) * var3);
060            this.motionY = (double)(-MathHelper.sin((this.rotationPitch + this.func_70183_g()) / 180.0F * (float)Math.PI) * var3);
061            this.setThrowableHeading(this.motionX, this.motionY, this.motionZ, this.func_70182_d(), 1.0F);
062        }
063    
064        public EntityThrowable(World par1World, double par2, double par4, double par6)
065        {
066            super(par1World);
067            this.ticksInGround = 0;
068            this.setSize(0.25F, 0.25F);
069            this.setPosition(par2, par4, par6);
070            this.yOffset = 0.0F;
071        }
072    
073        protected float func_70182_d()
074        {
075            return 1.5F;
076        }
077    
078        protected float func_70183_g()
079        {
080            return 0.0F;
081        }
082    
083        /**
084         * Similar to setArrowHeading, it's point the throwable entity to a x, y, z direction.
085         */
086        public void setThrowableHeading(double par1, double par3, double par5, float par7, float par8)
087        {
088            float var9 = MathHelper.sqrt_double(par1 * par1 + par3 * par3 + par5 * par5);
089            par1 /= (double)var9;
090            par3 /= (double)var9;
091            par5 /= (double)var9;
092            par1 += this.rand.nextGaussian() * 0.007499999832361937D * (double)par8;
093            par3 += this.rand.nextGaussian() * 0.007499999832361937D * (double)par8;
094            par5 += this.rand.nextGaussian() * 0.007499999832361937D * (double)par8;
095            par1 *= (double)par7;
096            par3 *= (double)par7;
097            par5 *= (double)par7;
098            this.motionX = par1;
099            this.motionY = par3;
100            this.motionZ = par5;
101            float var10 = MathHelper.sqrt_double(par1 * par1 + par5 * par5);
102            this.prevRotationYaw = this.rotationYaw = (float)(Math.atan2(par1, par5) * 180.0D / Math.PI);
103            this.prevRotationPitch = this.rotationPitch = (float)(Math.atan2(par3, (double)var10) * 180.0D / Math.PI);
104            this.ticksInGround = 0;
105        }
106    
107        @SideOnly(Side.CLIENT)
108    
109        /**
110         * Sets the velocity to the args. Args: x, y, z
111         */
112        public void setVelocity(double par1, double par3, double par5)
113        {
114            this.motionX = par1;
115            this.motionY = par3;
116            this.motionZ = par5;
117    
118            if (this.prevRotationPitch == 0.0F && this.prevRotationYaw == 0.0F)
119            {
120                float var7 = MathHelper.sqrt_double(par1 * par1 + par5 * par5);
121                this.prevRotationYaw = this.rotationYaw = (float)(Math.atan2(par1, par5) * 180.0D / Math.PI);
122                this.prevRotationPitch = this.rotationPitch = (float)(Math.atan2(par3, (double)var7) * 180.0D / Math.PI);
123            }
124        }
125    
126        /**
127         * Called to update the entity's position/logic.
128         */
129        public void onUpdate()
130        {
131            this.lastTickPosX = this.posX;
132            this.lastTickPosY = this.posY;
133            this.lastTickPosZ = this.posZ;
134            super.onUpdate();
135    
136            if (this.throwableShake > 0)
137            {
138                --this.throwableShake;
139            }
140    
141            if (this.inGround)
142            {
143                int var1 = this.worldObj.getBlockId(this.xTile, this.yTile, this.zTile);
144    
145                if (var1 == this.inTile)
146                {
147                    ++this.ticksInGround;
148    
149                    if (this.ticksInGround == 1200)
150                    {
151                        this.setDead();
152                    }
153    
154                    return;
155                }
156    
157                this.inGround = false;
158                this.motionX *= (double)(this.rand.nextFloat() * 0.2F);
159                this.motionY *= (double)(this.rand.nextFloat() * 0.2F);
160                this.motionZ *= (double)(this.rand.nextFloat() * 0.2F);
161                this.ticksInGround = 0;
162                this.ticksInAir = 0;
163            }
164            else
165            {
166                ++this.ticksInAir;
167            }
168    
169            Vec3 var16 = this.worldObj.getWorldVec3Pool().getVecFromPool(this.posX, this.posY, this.posZ);
170            Vec3 var2 = this.worldObj.getWorldVec3Pool().getVecFromPool(this.posX + this.motionX, this.posY + this.motionY, this.posZ + this.motionZ);
171            MovingObjectPosition var3 = this.worldObj.rayTraceBlocks(var16, var2);
172            var16 = this.worldObj.getWorldVec3Pool().getVecFromPool(this.posX, this.posY, this.posZ);
173            var2 = this.worldObj.getWorldVec3Pool().getVecFromPool(this.posX + this.motionX, this.posY + this.motionY, this.posZ + this.motionZ);
174    
175            if (var3 != null)
176            {
177                var2 = this.worldObj.getWorldVec3Pool().getVecFromPool(var3.hitVec.xCoord, var3.hitVec.yCoord, var3.hitVec.zCoord);
178            }
179    
180            if (!this.worldObj.isRemote)
181            {
182                Entity var4 = null;
183                List var5 = this.worldObj.getEntitiesWithinAABBExcludingEntity(this, this.boundingBox.addCoord(this.motionX, this.motionY, this.motionZ).expand(1.0D, 1.0D, 1.0D));
184                double var6 = 0.0D;
185                EntityLiving var8 = this.func_85052_h();
186                Iterator var9 = var5.iterator();
187    
188                while (var9.hasNext())
189                {
190                    Entity var10 = (Entity)var9.next();
191    
192                    if (var10.canBeCollidedWith() && (var10 != var8 || this.ticksInAir >= 5))
193                    {
194                        float var11 = 0.3F;
195                        AxisAlignedBB var12 = var10.boundingBox.expand((double)var11, (double)var11, (double)var11);
196                        MovingObjectPosition var13 = var12.calculateIntercept(var16, var2);
197    
198                        if (var13 != null)
199                        {
200                            double var14 = var16.distanceTo(var13.hitVec);
201    
202                            if (var14 < var6 || var6 == 0.0D)
203                            {
204                                var4 = var10;
205                                var6 = var14;
206                            }
207                        }
208                    }
209                }
210    
211                if (var4 != null)
212                {
213                    var3 = new MovingObjectPosition(var4);
214                }
215            }
216    
217            if (var3 != null)
218            {
219                if (var3.typeOfHit == EnumMovingObjectType.TILE && this.worldObj.getBlockId(var3.blockX, var3.blockY, var3.blockZ) == Block.portal.blockID)
220                {
221                    this.setInPortal();
222                }
223                else
224                {
225                    this.onImpact(var3);
226                }
227            }
228    
229            this.posX += this.motionX;
230            this.posY += this.motionY;
231            this.posZ += this.motionZ;
232            float var17 = MathHelper.sqrt_double(this.motionX * this.motionX + this.motionZ * this.motionZ);
233            this.rotationYaw = (float)(Math.atan2(this.motionX, this.motionZ) * 180.0D / Math.PI);
234    
235            for (this.rotationPitch = (float)(Math.atan2(this.motionY, (double)var17) * 180.0D / Math.PI); this.rotationPitch - this.prevRotationPitch < -180.0F; this.prevRotationPitch -= 360.0F)
236            {
237                ;
238            }
239    
240            while (this.rotationPitch - this.prevRotationPitch >= 180.0F)
241            {
242                this.prevRotationPitch += 360.0F;
243            }
244    
245            while (this.rotationYaw - this.prevRotationYaw < -180.0F)
246            {
247                this.prevRotationYaw -= 360.0F;
248            }
249    
250            while (this.rotationYaw - this.prevRotationYaw >= 180.0F)
251            {
252                this.prevRotationYaw += 360.0F;
253            }
254    
255            this.rotationPitch = this.prevRotationPitch + (this.rotationPitch - this.prevRotationPitch) * 0.2F;
256            this.rotationYaw = this.prevRotationYaw + (this.rotationYaw - this.prevRotationYaw) * 0.2F;
257            float var18 = 0.99F;
258            float var19 = this.getGravityVelocity();
259    
260            if (this.isInWater())
261            {
262                for (int var7 = 0; var7 < 4; ++var7)
263                {
264                    float var20 = 0.25F;
265                    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);
266                }
267    
268                var18 = 0.8F;
269            }
270    
271            this.motionX *= (double)var18;
272            this.motionY *= (double)var18;
273            this.motionZ *= (double)var18;
274            this.motionY -= (double)var19;
275            this.setPosition(this.posX, this.posY, this.posZ);
276        }
277    
278        /**
279         * Gets the amount of gravity to apply to the thrown entity with each tick.
280         */
281        protected float getGravityVelocity()
282        {
283            return 0.03F;
284        }
285    
286        /**
287         * Called when this EntityThrowable hits a block or entity.
288         */
289        protected abstract void onImpact(MovingObjectPosition var1);
290    
291        /**
292         * (abstract) Protected helper method to write subclass entity data to NBT.
293         */
294        public void writeEntityToNBT(NBTTagCompound par1NBTTagCompound)
295        {
296            par1NBTTagCompound.setShort("xTile", (short)this.xTile);
297            par1NBTTagCompound.setShort("yTile", (short)this.yTile);
298            par1NBTTagCompound.setShort("zTile", (short)this.zTile);
299            par1NBTTagCompound.setByte("inTile", (byte)this.inTile);
300            par1NBTTagCompound.setByte("shake", (byte)this.throwableShake);
301            par1NBTTagCompound.setByte("inGround", (byte)(this.inGround ? 1 : 0));
302    
303            if ((this.field_85053_h == null || this.field_85053_h.length() == 0) && this.thrower != null && this.thrower instanceof EntityPlayer)
304            {
305                this.field_85053_h = this.thrower.getEntityName();
306            }
307    
308            par1NBTTagCompound.setString("ownerName", this.field_85053_h == null ? "" : this.field_85053_h);
309        }
310    
311        /**
312         * (abstract) Protected helper method to read subclass entity data from NBT.
313         */
314        public void readEntityFromNBT(NBTTagCompound par1NBTTagCompound)
315        {
316            this.xTile = par1NBTTagCompound.getShort("xTile");
317            this.yTile = par1NBTTagCompound.getShort("yTile");
318            this.zTile = par1NBTTagCompound.getShort("zTile");
319            this.inTile = par1NBTTagCompound.getByte("inTile") & 255;
320            this.throwableShake = par1NBTTagCompound.getByte("shake") & 255;
321            this.inGround = par1NBTTagCompound.getByte("inGround") == 1;
322            this.field_85053_h = par1NBTTagCompound.getString("ownerName");
323    
324            if (this.field_85053_h != null && this.field_85053_h.length() == 0)
325            {
326                this.field_85053_h = null;
327            }
328        }
329    
330        @SideOnly(Side.CLIENT)
331        public float getShadowSize()
332        {
333            return 0.0F;
334        }
335    
336        public EntityLiving func_85052_h()
337        {
338            if (this.thrower == null && this.field_85053_h != null && this.field_85053_h.length() > 0)
339            {
340                this.thrower = this.worldObj.getPlayerEntityByName(this.field_85053_h);
341            }
342    
343            return this.thrower;
344        }
345    }