    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    }