    001    package net.minecraft.client.particle;
    002
    003    import cpw.mods.fml.relauncher.Side;
    004    import cpw.mods.fml.relauncher.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;
    018        protected int particleMaxAge;
    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
    035        /** Particle alpha */
    036        protected float particleAlpha;
    037        public static double interpPosX;
    038        public static double interpPosY;
    039        public static double interpPosZ;
    040
    041        protected EntityFX(World par1World, double par2, double par4, double par6)
    042        {
    043            super(par1World);
    044            this.particleAge = 0;
    045            this.particleMaxAge = 0;
    046            this.particleAlpha = 1.0F;
    047            this.setSize(0.2F, 0.2F);
    048            this.yOffset = this.height / 2.0F;
    049            this.setPosition(par2, par4, par6);
    050            this.lastTickPosX = par2;
    051            this.lastTickPosY = par4;
    052            this.lastTickPosZ = par6;
    053            this.particleRed = this.particleGreen = this.particleBlue = 1.0F;
    054            this.particleTextureJitterX = this.rand.nextFloat() * 3.0F;
    055            this.particleTextureJitterY = this.rand.nextFloat() * 3.0F;
    056            this.particleScale = (this.rand.nextFloat() * 0.5F + 0.5F) * 2.0F;
    057            this.particleMaxAge = (int)(4.0F / (this.rand.nextFloat() * 0.9F + 0.1F));
    058            this.particleAge = 0;
    059        }
    060
    061        public EntityFX(World par1World, double par2, double par4, double par6, double par8, double par10, double par12)
    062        {
    063            this(par1World, par2, par4, par6);
    064            this.motionX = par8 + (double)((float)(Math.random() * 2.0D - 1.0D) * 0.4F);
    065            this.motionY = par10 + (double)((float)(Math.random() * 2.0D - 1.0D) * 0.4F);
    066            this.motionZ = par12 + (double)((float)(Math.random() * 2.0D - 1.0D) * 0.4F);
    067            float var14 = (float)(Math.random() + Math.random() + 1.0D) * 0.15F;
    068            float var15 = MathHelper.sqrt_double(this.motionX * this.motionX + this.motionY * this.motionY + this.motionZ * this.motionZ);
    069            this.motionX = this.motionX / (double)var15 * (double)var14 * 0.4000000059604645D;
    070            this.motionY = this.motionY / (double)var15 * (double)var14 * 0.4000000059604645D + 0.10000000149011612D;
    071            this.motionZ = this.motionZ / (double)var15 * (double)var14 * 0.4000000059604645D;
    072        }
    073
    074        public EntityFX multiplyVelocity(float par1)
    075        {
    076            this.motionX *= (double)par1;
    077            this.motionY = (this.motionY - 0.10000000149011612D) * (double)par1 + 0.10000000149011612D;
    078            this.motionZ *= (double)par1;
    079            return this;
    080        }
    081
    082        public EntityFX multipleParticleScaleBy(float par1)
    083        {
    084            this.setSize(0.2F * par1, 0.2F * par1);
    085            this.particleScale *= par1;
    086            return this;
    087        }
    088
    089        public void setRBGColorF(float par1, float par2, float par3)
    090        {
    091            this.particleRed = par1;
    092            this.particleGreen = par2;
    093            this.particleBlue = par3;
    094        }
    095
    096        /**
    097         * Sets the particle alpha (float)
    098         */
    099        public void setAlphaF(float par1)
    100        {
    101            this.particleAlpha = par1;
    102        }
    103
    104        public float getRedColorF()
    105        {
    106            return this.particleRed;
    107        }
    108
    109        public float getGreenColorF()
    110        {
    111            return this.particleGreen;
    112        }
    113
    114        public float getBlueColorF()
    115        {
    116            return this.particleBlue;
    117        }
    118
    119        /**
    120         * returns if this entity triggers Block.onEntityWalking on the blocks they walk on. used for spiders and wolves to
    121         * prevent them from trampling crops
    122         */
    123        protected boolean canTriggerWalking()
    124        {
    125            return false;
    126        }
    127
    128        protected void entityInit() {}
    129
    130        /**
    131         * Called to update the entity's position/logic.
    132         */
    133        public void onUpdate()
    134        {
    135            this.prevPosX = this.posX;
    136            this.prevPosY = this.posY;
    137            this.prevPosZ = this.posZ;
    138
    139            if (this.particleAge++ >= this.particleMaxAge)
    140            {
    141                this.setDead();
    142            }
    143
    144            this.motionY -= 0.04D * (double)this.particleGravity;
    145            this.moveEntity(this.motionX, this.motionY, this.motionZ);
    146            this.motionX *= 0.9800000190734863D;
    147            this.motionY *= 0.9800000190734863D;
    148            this.motionZ *= 0.9800000190734863D;
    149
    150            if (this.onGround)
    151            {
    152                this.motionX *= 0.699999988079071D;
    153                this.motionZ *= 0.699999988079071D;
    154            }
    155        }
    156
    157        public void renderParticle(Tessellator par1Tessellator, float par2, float par3, float par4, float par5, float par6, float par7)
    158        {
    159            float var8 = (float)(this.particleTextureIndex % 16) / 16.0F;
    160            float var9 = var8 + 0.0624375F;
    161            float var10 = (float)(this.particleTextureIndex / 16) / 16.0F;
    162            float var11 = var10 + 0.0624375F;
    163            float var12 = 0.1F * this.particleScale;
    164            float var13 = (float)(this.prevPosX + (this.posX - this.prevPosX) * (double)par2 - interpPosX);
    165            float var14 = (float)(this.prevPosY + (this.posY - this.prevPosY) * (double)par2 - interpPosY);
    166            float var15 = (float)(this.prevPosZ + (this.posZ - this.prevPosZ) * (double)par2 - interpPosZ);
    167            float var16 = 1.0F;
    168            par1Tessellator.setColorRGBA_F(this.particleRed * var16, this.particleGreen * var16, this.particleBlue * var16, this.particleAlpha);
    169            par1Tessellator.addVertexWithUV((double)(var13 - par3 * var12 - par6 * var12), (double)(var14 - par4 * var12), (double)(var15 - par5 * var12 - par7 * var12), (double)var9, (double)var11);
    170            par1Tessellator.addVertexWithUV((double)(var13 - par3 * var12 + par6 * var12), (double)(var14 + par4 * var12), (double)(var15 - par5 * var12 + par7 * var12), (double)var9, (double)var10);
    171            par1Tessellator.addVertexWithUV((double)(var13 + par3 * var12 + par6 * var12), (double)(var14 + par4 * var12), (double)(var15 + par5 * var12 + par7 * var12), (double)var8, (double)var10);
    172            par1Tessellator.addVertexWithUV((double)(var13 + par3 * var12 - par6 * var12), (double)(var14 - par4 * var12), (double)(var15 + par5 * var12 - par7 * var12), (double)var8, (double)var11);
    173        }
    174
    175        public int getFXLayer()
    176        {
    177            return 0;
    178        }
    179
    180        /**
    181         * (abstract) Protected helper method to write subclass entity data to NBT.
    182         */
    183        public void writeEntityToNBT(NBTTagCompound par1NBTTagCompound) {}
    184
    185        /**
    186         * (abstract) Protected helper method to read subclass entity data from NBT.
    187         */
    188        public void readEntityFromNBT(NBTTagCompound par1NBTTagCompound) {}
    189
    190        /**
    191         * Public method to set private field particleTextureIndex.
    192         */
    193        public void setParticleTextureIndex(int par1)
    194        {
    195            this.particleTextureIndex = par1;
    196        }
    197
    198        public int getParticleTextureIndex()
    199        {
    200            return this.particleTextureIndex;
    201        }
    202
    203        /**
    204         * If returns false, the item will not inflict any damage against entities.
    205         */
    206        public boolean canAttackWithItem()
    207        {
    208            return false;
    209        }
    210
    211        public String toString()
    212        {
    213            return this.getClass().getSimpleName() + ", Pos (" + this.posX + "," + this.posY + "," + this.posZ + "), RGBA (" + this.particleRed + "," + this.particleGreen + "," + this.particleBlue + "," + this.particleAlpha + "), Age " + this.particleAge;
    214        }
    215    }