[1.6.4] Custom Projectile detonating on character if target is within 5 blocks?

[Athire]

Hello guys! Me again! So I'm having a weird issue and I can't find a solution anywhere on the interwebs, so I thought I'd ask it here. So I have an item that, when right clicked, shoots a small invisible projectile that calls down lightning when it hits the ground. It works perfectly at mid/long range, but when the projectile would hit something within 5 blocks, it breaks in the player model and calls down lightning on the player. I tried making the projectile spawn further in front of the player, but no luck. I at one point spawned it in 2 blocks in front of the player and it didn't make a difference. I was however able to find that the acceleration on the projectile is what's causing the issue. I usually set it's x/y/z motion to the players look vector * 5, to negate gravity drop. I found that when I lower it to 2 and below I no longer get this issue. But I don't want my projectile to be affected by gravity! So my question is this: How can I make my projectile not affected by gravity without increasing its x/y/z motion? Or is there a way to increase it's x/y/z motion speed without causing this issue? I'll post a bit of code below.

 

 

here is the code in the item that sets the projectile's speed and angle:

 

lightningProjectile lp= new lightningProjectile(par2World, par3EntityPlayer);

      Vec3 look = par3EntityPlayer.getLookVec();

      lp.setPosition(par3EntityPlayer.posX + look.xCoord * par3EntityPlayer.getEyeHeight(), par3EntityPlayer.posY + look.yCoord * par3EntityPlayer.getEyeHeight()+1, par3EntityPlayer.posZ + look.zCoord * par3EntityPlayer.getEyeHeight());

      lp.motionX = look.xCoord * 2;

          lp.motionY = look.yCoord * 2;

          lp.motionZ = look.zCoord * 2;

par2World.spawnEntityInWorld(lp);

 

where "lightningProjectile" is my projectile that calls down lightning on impact. This is in an onItemRightClick() function.

the lightningProjectile class doesn't really have much relevant code, it just spans a lightning bolt on impact. It's basicly a re-skinned snowball that spawns lightning.

 

Anyway, thank you guys again for all of your help! Sorry if I ask a ton of questions on here, I'm just still pretty new at this

[coolAlias]

From EntityThrowable:

@Override
protected float getGravityVelocity() {
return 0.01F;
}

You could use zero, but then your entity would travel forever which I've found can have it's own issues. Up to you.

[Athire]

Thank you! That works perfectly! And also thank you so much for your extended properties tutorial, that's probably the main reason I was able to get my mana system off the ground! If I'm talking to the same coolAlias that is Thanks again, for this and your other resources which I have been using!

[Draco18s]

There's also World#raycast_do_do

[coolAlias]

Yeah, that's me Glad you found those things helpful. What Draco suggested is also very useful, using raycasting or following the vector yourself onItemRightClick can get you the entity/block directly, rather than spawning an entity.

 

Either way works, but I usually go with the raytracing in cases where I don't need anything rendering on the screen (e.g. when I don't have a projectile to render, trailing particles, that kind of thing).

[Draco18s]

(As a correction, the function name is rayTraceBlocks_do_do as well as two variations on clip() but both just call rayTraceBlocks_do_do with false for the additional parameters)