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 }