001    package net.minecraft.client.particle;
002    
003    import cpw.mods.fml.common.Side;
004    import cpw.mods.fml.common.asm.SideOnly;
005    import net.minecraft.client.renderer.Tessellator;
006    import net.minecraft.entity.Entity;
007    import net.minecraft.nbt.NBTTagCompound;
008    import net.minecraft.util.MathHelper;
009    import net.minecraft.world.World;
010    
011    @SideOnly(Side.CLIENT)
012    public class EntityFX extends Entity
013    {
014        private int particleTextureIndex;
015        protected float particleTextureJitterX;
016        protected float particleTextureJitterY;
017        protected int particleAge = 0;
018        protected int particleMaxAge = 0;
019        protected float particleScale;
020        protected float particleGravity;
021    
022        /** The red amount of color. Used as a percentage, 1.0 = 255 and 0.0 = 0. */
023        protected float particleRed;
024    
025        /**
026         * The green amount of color. Used as a percentage, 1.0 = 255 and 0.0 = 0.
027         */
028        protected float particleGreen;
029    
030        /**
031         * The blue amount of color. Used as a percentage, 1.0 = 255 and 0.0 = 0.
032         */
033        protected float particleBlue;
034        protected float field_82339_as = 1.0F;
035        public static double interpPosX;
036        public static double interpPosY;
037        public static double interpPosZ;
038    
039        public EntityFX(World par1World, double par2, double par4, double par6, double par8, double par10, double par12)
040        {
041            super(par1World);
042            this.setSize(0.2F, 0.2F);
043            this.yOffset = this.height / 2.0F;
044            this.setPosition(par2, par4, par6);
045            this.lastTickPosX = par2;
046            this.lastTickPosY = par4;
047            this.lastTickPosZ = par6;
048            this.particleRed = this.particleGreen = this.particleBlue = 1.0F;
049            this.motionX = par8 + (double)((float)(Math.random() * 2.0D - 1.0D) * 0.4F);
050            this.motionY = par10 + (double)((float)(Math.random() * 2.0D - 1.0D) * 0.4F);
051            this.motionZ = par12 + (double)((float)(Math.random() * 2.0D - 1.0D) * 0.4F);
052            float var14 = (float)(Math.random() + Math.random() + 1.0D) * 0.15F;
053            float var15 = MathHelper.sqrt_double(this.motionX * this.motionX + this.motionY * this.motionY + this.motionZ * this.motionZ);
054            this.motionX = this.motionX / (double)var15 * (double)var14 * 0.4000000059604645D;
055            this.motionY = this.motionY / (double)var15 * (double)var14 * 0.4000000059604645D + 0.10000000149011612D;
056            this.motionZ = this.motionZ / (double)var15 * (double)var14 * 0.4000000059604645D;
057            this.particleTextureJitterX = this.rand.nextFloat() * 3.0F;
058            this.particleTextureJitterY = this.rand.nextFloat() * 3.0F;
059            this.particleScale = (this.rand.nextFloat() * 0.5F + 0.5F) * 2.0F;
060            this.particleMaxAge = (int)(4.0F / (this.rand.nextFloat() * 0.9F + 0.1F));
061            this.particleAge = 0;
062        }
063    
064        public EntityFX multiplyVelocity(float par1)
065        {
066            this.motionX *= (double)par1;
067            this.motionY = (this.motionY - 0.10000000149011612D) * (double)par1 + 0.10000000149011612D;
068            this.motionZ *= (double)par1;
069            return this;
070        }
071    
072        public EntityFX multipleParticleScaleBy(float par1)
073        {
074            this.setSize(0.2F * par1, 0.2F * par1);
075            this.particleScale *= par1;
076            return this;
077        }
078    
079        public void setRBGColorF(float par1, float par2, float par3)
080        {
081            this.particleRed = par1;
082            this.particleGreen = par2;
083            this.particleBlue = par3;
084        }
085    
086        public void func_82338_g(float par1)
087        {
088            this.field_82339_as = par1;
089        }
090    
091        public float getRedColorF()
092        {
093            return this.particleRed;
094        }
095    
096        public float getGreenColorF()
097        {
098            return this.particleGreen;
099        }
100    
101        public float getBlueColorF()
102        {
103            return this.particleBlue;
104        }
105    
106        /**
107         * returns if this entity triggers Block.onEntityWalking on the blocks they walk on. used for spiders and wolves to
108         * prevent them from trampling crops
109         */
110        protected boolean canTriggerWalking()
111        {
112            return false;
113        }
114    
115        protected void entityInit() {}
116    
117        /**
118         * Called to update the entity's position/logic.
119         */
120        public void onUpdate()
121        {
122            this.prevPosX = this.posX;
123            this.prevPosY = this.posY;
124            this.prevPosZ = this.posZ;
125    
126            if (this.particleAge++ >= this.particleMaxAge)
127            {
128                this.setDead();
129            }
130    
131            this.motionY -= 0.04D * (double)this.particleGravity;
132            this.moveEntity(this.motionX, this.motionY, this.motionZ);
133            this.motionX *= 0.9800000190734863D;
134            this.motionY *= 0.9800000190734863D;
135            this.motionZ *= 0.9800000190734863D;
136    
137            if (this.onGround)
138            {
139                this.motionX *= 0.699999988079071D;
140                this.motionZ *= 0.699999988079071D;
141            }
142        }
143    
144        public void renderParticle(Tessellator par1Tessellator, float par2, float par3, float par4, float par5, float par6, float par7)
145        {
146            float var8 = (float)(this.particleTextureIndex % 16) / 16.0F;
147            float var9 = var8 + 0.0624375F;
148            float var10 = (float)(this.particleTextureIndex / 16) / 16.0F;
149            float var11 = var10 + 0.0624375F;
150            float var12 = 0.1F * this.particleScale;
151            float var13 = (float)(this.prevPosX + (this.posX - this.prevPosX) * (double)par2 - interpPosX);
152            float var14 = (float)(this.prevPosY + (this.posY - this.prevPosY) * (double)par2 - interpPosY);
153            float var15 = (float)(this.prevPosZ + (this.posZ - this.prevPosZ) * (double)par2 - interpPosZ);
154            float var16 = 1.0F;
155            par1Tessellator.setColorRGBA_F(this.particleRed * var16, this.particleGreen * var16, this.particleBlue * var16, this.field_82339_as);
156            par1Tessellator.addVertexWithUV((double)(var13 - par3 * var12 - par6 * var12), (double)(var14 - par4 * var12), (double)(var15 - par5 * var12 - par7 * var12), (double)var9, (double)var11);
157            par1Tessellator.addVertexWithUV((double)(var13 - par3 * var12 + par6 * var12), (double)(var14 + par4 * var12), (double)(var15 - par5 * var12 + par7 * var12), (double)var9, (double)var10);
158            par1Tessellator.addVertexWithUV((double)(var13 + par3 * var12 + par6 * var12), (double)(var14 + par4 * var12), (double)(var15 + par5 * var12 + par7 * var12), (double)var8, (double)var10);
159            par1Tessellator.addVertexWithUV((double)(var13 + par3 * var12 - par6 * var12), (double)(var14 - par4 * var12), (double)(var15 + par5 * var12 - par7 * var12), (double)var8, (double)var11);
160        }
161    
162        public int getFXLayer()
163        {
164            return 0;
165        }
166    
167        /**
168         * (abstract) Protected helper method to write subclass entity data to NBT.
169         */
170        public void writeEntityToNBT(NBTTagCompound par1NBTTagCompound) {}
171    
172        /**
173         * (abstract) Protected helper method to read subclass entity data from NBT.
174         */
175        public void readEntityFromNBT(NBTTagCompound par1NBTTagCompound) {}
176    
177        /**
178         * Public method to set private field particleTextureIndex.
179         */
180        public void setParticleTextureIndex(int par1)
181        {
182            this.particleTextureIndex = par1;
183        }
184    
185        public int getParticleTextureIndex()
186        {
187            return this.particleTextureIndex;
188        }
189    
190        /**
191         * If returns false, the item will not inflict any damage against entities.
192         */
193        public boolean canAttackWithItem()
194        {
195            return false;
196        }
197    
198        public String toString()
199        {
200            return this.getClass().getSimpleName() + ", Pos (" + this.posX + "," + this.posY + "," + this.posZ + "), RGBA (" + this.particleRed + "," + this.particleGreen + "," + this.particleBlue + "," + this.field_82339_as + "), Age " + this.particleAge;
201        }
202    }