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