[1.7.10] Gravitational cube?

[drok0920]

Hello,

I would like to know how i could make a block suck all entities within a 5 block radius around it toward itself unless the entity is a custom entity.  i dont know where to even start making this so please help.

 

Thank you,

Drok

[drok0920]

i want it to slowly move not instantly move to the block.  I would like it to be as if water was moving the entity but towards the block... if you need more info i may be able to supply a mod that does something like this.

[drok0920]

oh ok then how will i get it to always move you towards the block in the shortest path?

[drok0920]

Well i started reading into it and under stood nothing.....

[deyahruhd]

Get the position of the block relative to the entity's position, multiply the resulting vector by some factor then move the entity with that vector. If you want it to act like gravity, have the factor be affected by the entity's distance to the block.

 

All simple vector math.

[drok0920]

I'll be honest and say that that didnt help me.. but i will try to figure it out and then post what i have

[Toastrackenigma]

It's a very hard thing to do - in my mod I've got an item that when right-clicked sucks everything within 32 blocks towards it, here's the whole class incase it helps

 

[embed=425,349]

package com.toastrackengima.techcraft;

//Imports

import java.util.List;

 

import net.minecraft.creativetab.CreativeTabs;

import net.minecraft.entity.item.EntityItem;

import net.minecraft.entity.player.EntityPlayer;

import net.minecraft.item.Item;

import net.minecraft.item.ItemStack;

import net.minecraft.world.World;

 

public class TechDiamondMag extends Item{

 

public static CreativeTabs tabTech; //Creative tab

 

public TechDiamondMag() {

setMaxStackSize(1); //Basic stuff, no stacking, textures, damage, etc

setUnlocalizedName("DiamondMag");

this.setCreativeTab(MainMod.tabTech);

this.setTextureName("techcraft:DiamondMagnet");

setMaxDamage(1028);

}

 

public void addInformation(ItemStack par1ItemStack, EntityPlayer par2EntityPlayer, List par3List, boolean par4) {

par3List.add("A golden magnet embued"); //Add some of the item lore

par3List.add("with the power of diamond");

par3List.add("Max pull distance: 32");

}

@Override

public ItemStack onItemRightClick(ItemStack is, World world, EntityPlayer ep)

    { //While the item is being right-clicked

double radius = 5;

        List<EntityItem> items = world.getEntitiesWithinAABB(EntityItem.class, ep.boundingBox.expand(32, 32, 32)); //The area to pull items from (change 32 to any number)

        for(EntityItem it : items){

            double distX = ep.posX - it.posX; //Move those items!

            double distZ = ep.posZ - it.posZ;

            double distY = it.posY+1.5D - ep.posY;

            double dir = Math.atan2(distZ, distX);

            double speed = 1F / it.getDistanceToEntity(ep) * 15; //Adjust the speed here (change 15)

 

            if (distY<0)

            {

                it.motionY += speed;

            }

 

            it.motionX = Math.cos(dir) * speed;

            it.motionZ = Math.sin(dir) * speed;

        }

 

    is.damageItem(1, ep); //Damage the item (those magnets don't last forever, you know)

    return is;

    }

 

}

[/embed]

You'd have to change some of that to make it into a block,  but that should give you a starting point

-Toastrackenigma

[drok0920]

Thank you Toastrackenigma that does help i will try to put the in my onUpdate method or whatever its called.  Once again thank you