Hi everyone, i'm porting my vanilla mod to forge, and i'm having a problem...

 

With Vanilla, i register a new ParticleFX in the "RenderGlobal" class and i use the method:

String particle = "myParticle";
this.worldObj.spawnParticle(particle, this.posX, this.posY, this.posZ,a,-b,c);

 

Everything works fine.

 

With forge, i use this way (without modifying RenderGlobal.java then):

 

        
EntityFX particle = new EntitySpellFXDamage(w, player.posX, player.posY, player.posZ,a,-b,c);
FMLClientHandler.instance().getClient().effectRenderer.addEffect(particle);

 

With forge, my game crash when i spawn this particles and i have a NullPointer error on :

moveEntity(motionX, motionY, motionZ);

(inside my EntitySpellFXDamage class)

 

Here's my class:

package MagicCrusade.particles;

import java.util.List;

import net.minecraft.client.particle.EntityFX;
import net.minecraft.client.renderer.Tessellator;
import net.minecraft.entity.Entity;
import net.minecraft.entity.EntityLivingBase;
import net.minecraft.entity.passive.EntityWolf;
import net.minecraft.entity.player.EntityPlayer;
import net.minecraft.server.MinecraftServer;
import net.minecraft.world.World;


public class EntitySpellFXDamage extends EntityFX
{
    float smokeParticleScale;

    public EntitySpellFXDamage(World par1World, double par2, double par4, double par6, double par8, double par10, double par12)
    {
        this(par1World, par2, par4, par6, par8, par10, par12, 1.0F);
    }

    public EntitySpellFXDamage(World par1World, double par2, double par4, double par6, double par8, double par10, double par12, float par14)
    {
        super(par1World, par2, par4, par6, 0.0D, 0.0D, 0.0D);
        motionX *= 0.10000000149011612D;
        motionY *= 0.10000000149011612D;
        motionZ *= 0.10000000149011612D;
        motionX += par8;
        motionY += par10;
        motionZ += par12;
        particleRed = particleGreen = particleBlue = /*(float)(Math.random() * 0.30000001192092896D)*/0;
        particleRed = 255;
        particleGreen = (float)Math.random();
        particleScale *= 0.75F;
        particleScale *= par14;
        smokeParticleScale = particleScale;
        particleMaxAge = (int)(8D / (Math.random() * 0.80000000000000004D + 0.20000000000000001D));
        particleMaxAge *= par14;
        noClip = false;
    }

    public void renderParticle(Tessellator par1Tessellator, float par2, float par3, float par4, float par5, float par6, float par7)
    {
        float f = (((float)particleAge + par2) / (float)particleMaxAge) * 32F;

        if (f < 0.0F)
        {
            f = 0.0F;
        }

        if (f > 1.0F)
        {
            f = 1.0F;
        }

        particleScale = smokeParticleScale * f;
        super.renderParticle(par1Tessellator, par2, par3, par4, par5, par6, par7);
    }

    /**
     * Called to update the entity's position/logic.
     */
    public void onUpdate()
    {
        prevPosX = posX;
        prevPosY = posY;
        prevPosZ = posZ;

        if (particleAge++ >= particleMaxAge)
        {
            setDead();
        }

        setParticleTextureIndex(7 - (particleAge *  / particleMaxAge);
        //motionY += 0.0040000000000000001D;
        

        moveEntity(motionX, motionY, motionZ);

        if (posY == prevPosY)
        {
            motionX *= 1.1000000000000001D;
            motionZ *= 1.1000000000000001D;
        }

        motionX *= 0.95999997854232788D;
        motionY *= 0.95999997854232788D;
        motionZ *= 0.95999997854232788D;

        if (onGround)
        {
            motionX *= 0.69999998807907104D;
            motionZ *= 0.69999998807907104D;
        }
        
        List list = this.worldObj.getEntitiesWithinAABBExcludingEntity(this, boundingBox.expand(0.25D, 1.0D, 0.25D));

        if (list != null)
        {
            for (int i = 0; i < list.size(); i++)
            {
                Entity entity = (Entity)list.get(i);

                if (!entity.isDead)
                {
             	   if(entity instanceof EntityLivingBase && !(entity instanceof EntityPlayer))
             	   {
             		  entity.setFire(4);
             		  this.setDead();
             	   }

                }
            }
        }
    }
}

 

 

 

Thank for help! Maybe i have to register particles somewhere on thing like this... ?

 

EntityFX particle = new EntitySpellFXDamage(w, player.posX, player.posY, player.posZ,a,-b,c);
FMLClientHandler.instance().getClient().effectRenderer.addEffect(particle);

Where did you put this ?

I put this after an algorythm to make an effect.

 

Well, i remade my EntityFX  and it seems to work now... It may come from the variable World, sorry!