001    package net.minecraft.src;
002    
003    import cpw.mods.fml.common.Side;
004    import cpw.mods.fml.common.asm.SideOnly;
005    
006    @SideOnly(Side.CLIENT)
007    public class EntityFX extends Entity
008    {
009        private int particleTextureIndex;
010        protected float particleTextureJitterX;
011        protected float particleTextureJitterY;
012        protected int particleAge = 0;
013        protected int particleMaxAge = 0;
014        protected float particleScale;
015        protected float particleGravity;
016    
017        /** The red amount of color. Used as a percentage, 1.0 = 255 and 0.0 = 0. */
018        protected float particleRed;
019    
020        /**
021         * The green amount of color. Used as a percentage, 1.0 = 255 and 0.0 = 0.
022         */
023        protected float particleGreen;
024    
025        /**
026         * The blue amount of color. Used as a percentage, 1.0 = 255 and 0.0 = 0.
027         */
028        protected float particleBlue;
029        protected float field_82339_as = 1.0F;
030        public static double interpPosX;
031        public static double interpPosY;
032        public static double interpPosZ;
033    
034        public EntityFX(World par1World, double par2, double par4, double par6, double par8, double par10, double par12)
035        {
036            super(par1World);
037            this.setSize(0.2F, 0.2F);
038            this.yOffset = this.height / 2.0F;
039            this.setPosition(par2, par4, par6);
040            this.particleRed = this.particleGreen = this.particleBlue = 1.0F;
041            this.motionX = par8 + (double)((float)(Math.random() * 2.0D - 1.0D) * 0.4F);
042            this.motionY = par10 + (double)((float)(Math.random() * 2.0D - 1.0D) * 0.4F);
043            this.motionZ = par12 + (double)((float)(Math.random() * 2.0D - 1.0D) * 0.4F);
044            float var14 = (float)(Math.random() + Math.random() + 1.0D) * 0.15F;
045            float var15 = MathHelper.sqrt_double(this.motionX * this.motionX + this.motionY * this.motionY + this.motionZ * this.motionZ);
046            this.motionX = this.motionX / (double)var15 * (double)var14 * 0.4000000059604645D;
047            this.motionY = this.motionY / (double)var15 * (double)var14 * 0.4000000059604645D + 0.10000000149011612D;
048            this.motionZ = this.motionZ / (double)var15 * (double)var14 * 0.4000000059604645D;
049            this.particleTextureJitterX = this.rand.nextFloat() * 3.0F;
050            this.particleTextureJitterY = this.rand.nextFloat() * 3.0F;
051            this.particleScale = (this.rand.nextFloat() * 0.5F + 0.5F) * 2.0F;
052            this.particleMaxAge = (int)(4.0F / (this.rand.nextFloat() * 0.9F + 0.1F));
053            this.particleAge = 0;
054        }
055    
056        public EntityFX multiplyVelocity(float par1)
057        {
058            this.motionX *= (double)par1;
059            this.motionY = (this.motionY - 0.10000000149011612D) * (double)par1 + 0.10000000149011612D;
060            this.motionZ *= (double)par1;
061            return this;
062        }
063    
064        public EntityFX multipleParticleScaleBy(float par1)
065        {
066            this.setSize(0.2F * par1, 0.2F * par1);
067            this.particleScale *= par1;
068            return this;
069        }
070    
071        public void setRBGColorF(float par1, float par2, float par3)
072        {
073            this.particleRed = par1;
074            this.particleGreen = par2;
075            this.particleBlue = par3;
076        }
077    
078        public void func_82338_g(float par1)
079        {
080            this.field_82339_as = par1;
081        }
082    
083        public float getRedColorF()
084        {
085            return this.particleRed;
086        }
087    
088        public float getGreenColorF()
089        {
090            return this.particleGreen;
091        }
092    
093        public float getBlueColorF()
094        {
095            return this.particleBlue;
096        }
097    
098        /**
099         * returns if this entity triggers Block.onEntityWalking on the blocks they walk on. used for spiders and wolves to
100         * prevent them from trampling crops
101         */
102        protected boolean canTriggerWalking()
103        {
104            return false;
105        }
106    
107        protected void entityInit() {}
108    
109        /**
110         * Called to update the entity's position/logic.
111         */
112        public void onUpdate()
113        {
114            this.prevPosX = this.posX;
115            this.prevPosY = this.posY;
116            this.prevPosZ = this.posZ;
117    
118            if (this.particleAge++ >= this.particleMaxAge)
119            {
120                this.setDead();
121            }
122    
123            this.motionY -= 0.04D * (double)this.particleGravity;
124            this.moveEntity(this.motionX, this.motionY, this.motionZ);
125            this.motionX *= 0.9800000190734863D;
126            this.motionY *= 0.9800000190734863D;
127            this.motionZ *= 0.9800000190734863D;
128    
129            if (this.onGround)
130            {
131                this.motionX *= 0.699999988079071D;
132                this.motionZ *= 0.699999988079071D;
133            }
134        }
135    
136        public void renderParticle(Tessellator par1Tessellator, float par2, float par3, float par4, float par5, float par6, float par7)
137        {
138            float var8 = (float)(this.particleTextureIndex % 16) / 16.0F;
139            float var9 = var8 + 0.0624375F;
140            float var10 = (float)(this.particleTextureIndex / 16) / 16.0F;
141            float var11 = var10 + 0.0624375F;
142            float var12 = 0.1F * this.particleScale;
143            float var13 = (float)(this.prevPosX + (this.posX - this.prevPosX) * (double)par2 - interpPosX);
144            float var14 = (float)(this.prevPosY + (this.posY - this.prevPosY) * (double)par2 - interpPosY);
145            float var15 = (float)(this.prevPosZ + (this.posZ - this.prevPosZ) * (double)par2 - interpPosZ);
146            float var16 = 1.0F;
147            par1Tessellator.setColorRGBA_F(this.particleRed * var16, this.particleGreen * var16, this.particleBlue * var16, this.field_82339_as);
148            par1Tessellator.addVertexWithUV((double)(var13 - par3 * var12 - par6 * var12), (double)(var14 - par4 * var12), (double)(var15 - par5 * var12 - par7 * var12), (double)var9, (double)var11);
149            par1Tessellator.addVertexWithUV((double)(var13 - par3 * var12 + par6 * var12), (double)(var14 + par4 * var12), (double)(var15 - par5 * var12 + par7 * var12), (double)var9, (double)var10);
150            par1Tessellator.addVertexWithUV((double)(var13 + par3 * var12 + par6 * var12), (double)(var14 + par4 * var12), (double)(var15 + par5 * var12 + par7 * var12), (double)var8, (double)var10);
151            par1Tessellator.addVertexWithUV((double)(var13 + par3 * var12 - par6 * var12), (double)(var14 - par4 * var12), (double)(var15 + par5 * var12 - par7 * var12), (double)var8, (double)var11);
152        }
153    
154        public int getFXLayer()
155        {
156            return 0;
157        }
158    
159        /**
160         * (abstract) Protected helper method to write subclass entity data to NBT.
161         */
162        public void writeEntityToNBT(NBTTagCompound par1NBTTagCompound) {}
163    
164        /**
165         * (abstract) Protected helper method to read subclass entity data from NBT.
166         */
167        public void readEntityFromNBT(NBTTagCompound par1NBTTagCompound) {}
168    
169        /**
170         * Public method to set private field particleTextureIndex.
171         */
172        public void setParticleTextureIndex(int par1)
173        {
174            this.particleTextureIndex = par1;
175        }
176    
177        public int getParticleTextureIndex()
178        {
179            return this.particleTextureIndex;
180        }
181    
182        /**
183         * If returns false, the item will not inflict any damage against entities.
184         */
185        public boolean canAttackWithItem()
186        {
187            return false;
188        }
189    }