Ok so I tried giving one of my custom entity a held item (like zombie pigmen have) but it didnt work. Thats not the problem though as now any entity that has a held item wont spawn or render. So I cant see endermen or zombie pigmen. Is there anyway I can fix this?
As dealman said there needs to be a bit more info however if you were to give me an idea of what you want I will be glad to help. Ive recently finished a first release big project and if you want you can get an early release of it to see some of my work.
I can code:
-Weapons, tools, armour, bows, semi-auto guns etc.
-Mobs
-Button gui (learning slots atm)
-New game mechanics
If theres anything particular you need I'll be willing to learn it.
I hope I can be of some service to your mod, just ill need some details...
First question is how do I make my gui open when I first start a new world and secondly how do I make it give me an item when I click one of the gui's buttons.
Try adding a damage source function, without doing that you are basically calling the damage source for the EntityArrow which doesn't know what your bullet is.
Here is the function I added in my EntityBullet, see if this helps.
// Declare a damage source for the bullet entity.
public static DamageSource causeBulletDamage(EntityBullet par0EntityBullet, Entity par1Entity)
{
return (new EntityDamageSourceIndirect("bullet", par0EntityBullet, par1Entity)).setProjectile();
}
Try adding a damage source function, without doing that you are basically calling the damage source for the EntityArrow which doesn't know what your bullet is.
Here is the function I added in my EntityBullet, see if this helps.
// Declare a damage source for the bullet entity.
public static DamageSource causeBulletDamage(EntityBullet par0EntityBullet, Entity par1Entity)
{
return (new EntityDamageSourceIndirect("bullet", par0EntityBullet, par1Entity)).setProjectile();
}
java.lang.NullPointerException
at net.minecraft.src.EntityLiving.attackEntityFrom(EntityLiving.java:847)
at net.minecraft.src.EntityMob.attackEntityFrom(EntityMob.java:69)
at net.minecraft.src.EntityBullet.onUpdate(EntityBullet.java:318)
at net.minecraft.src.World.updateEntityWithOptionalForce(World.java:2195)
at net.minecraft.src.World.updateEntity(World.java:2163)
at net.minecraft.src.World.updateEntities(World.java:2037)
at net.minecraft.client.Minecraft.runTick(Minecraft.java:1897)
at net.minecraft.client.Minecraft.runGameLoop(Minecraft.java:870)
at net.minecraft.client.Minecraft.run(Minecraft.java:801)
at java.lang.Thread.run(Unknown Source)
--- END ERROR REPORT fec367a0 ----------
I dont know why this is happening but here's the tile entity and the crash report Im hoping someone can help...
TileEntityCompactor
package net.minecraft.src;
public class TileEntityCompactor extends TileEntity implements IInventory{
public ItemStack compactorItemStacks[];
public TileEntityCompactor(){
compactorItemStacks = new ItemStack[4];
}
public int getSizeInventory()
{
return compactorItemStacks.length;
}
public ItemStack getStackInSlot(int i) {
return compactorItemStacks[i];
}
public ItemStack decrStackSize(int i, int j) {
if (compactorItemStacks[i] != null)
{
if (compactorItemStacks[i].stackSize <= j)
{
ItemStack itemstack = compactorItemStacks[i];
compactorItemStacks[i] = null;
return itemstack;
}
ItemStack itemstack1 = compactorItemStacks[i].splitStack(j);
if (compactorItemStacks[i].stackSize == 0)
{
compactorItemStacks[i] = null;
}
return itemstack1;
}
else
{
return null;
}
}
public void setInventorySlotContents(int i, ItemStack itemstack) {
compactorItemStacks[i] = itemstack;
if (itemstack != null && itemstack.stackSize > getInventoryStackLimit())
{
itemstack.stackSize = getInventoryStackLimit();
}
}
public String getInvName()
{
return "meh";
}
public int getInventoryStackLimit() {
// TODO Auto-generated method stub
return 64;
}
public void openChest() {
}
public void closeChest() {
// TODO Auto-generated method stub
}
public boolean copper = false;
public boolean tin = false;
public void updateEntity()
{
ItemStack itemstack = compactorItemStacks[0];
ItemStack itemstack1 = compactorItemStacks[1];
ItemStack itemstack2 = compactorItemStacks[2];
if (itemstack != null)
{
int i = itemstack.getItem().shiftedIndex;
if(i == Item.stick.shiftedIndex)
{
copper = true;
}
}
if (itemstack1 != null)
{
int i = itemstack.getItem().shiftedIndex;
if(i == Item.book.shiftedIndex)
{
tin = true;
}
}
}
public boolean isUseableByPlayer(EntityPlayer entityplayer)
{
if(worldObj.getBlockTileEntity(xCoord, yCoord, zCoord) != this)
{
return false;
}
return entityplayer.getDistanceSq((double)xCoord + 0.5D, (double)yCoord + 0.5D, (double)zCoord + 0.5D) <= 64D;
}
public ItemStack getStackInSlotOnClosing(int i) {
// TODO Auto-generated method stub
return null;
}
}
Error Report
--- BEGIN ERROR REPORT 1159a603 --------
Generated 8/05/12 7:32 PM
Minecraft: Minecraft 1.2.5
OS: Windows 7 (amd64) version 6.1
Java: 1.7.0_01, Oracle Corporation
VM: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
LWJGL: 2.4.2
OpenGL: Intel(R) HD Graphics version 2.1.0 - Build 8.15.10.2086, Intel
java.lang.NullPointerException
at net.minecraft.src.TileEntityCompactor.updateEntity(TileEntityCompactor.java:107)
at net.minecraft.src.World.updateEntities(World.java:2074)
at net.minecraft.client.Minecraft.runTick(Minecraft.java:1897)
at net.minecraft.client.Minecraft.runGameLoop(Minecraft.java:870)
at net.minecraft.client.Minecraft.run(Minecraft.java:801)
at java.lang.Thread.run(Unknown Source)
--- END ERROR REPORT b47dc091 ----------
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0
Nope, sorry I already know all this stuff, I just need to learn how to get it to start up when I start a game. (I learnt the other thing...)
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0
I can code:
-Weapons, tools, armour, bows, semi-auto guns etc.
-Mobs
-Button gui (learning slots atm)
-New game mechanics
If theres anything particular you need I'll be willing to learn it.
I hope I can be of some service to your mod, just ill need some details...
0
0
0
0
this is the main fuction that starts on the line.
if (shootingEntity == null) { damagesource = DamageSource.causePistolDamage(this, this); } else { damagesource = DamageSource.causePistolDamage(this, shootingEntity); }0
Im still getting the same error...
0
EntityBullet:
package net.minecraft.src; import java.util.List; import java.util.Random; public class EntityBullet extends Entity { private int xTile; private int yTile; private int zTile; private int inTile; private int inData; private boolean inGround; public boolean doesArrowBelongToPlayer; /** Seems to be some sort of timer for animating an arrow. */ public int arrowShake; /** The owner of this arrow. */ public Entity shootingEntity; private int ticksInGround; private int ticksInAir; private double damage; private int field_46027_au; /** Is this arrow a critical hit? (Controls particles and damage) */ public boolean arrowCritical; public EntityBullet(World par1World) { super(par1World); xTile = -1; yTile = -1; zTile = -1; inTile = 0; inData = 0; inGround = false; doesArrowBelongToPlayer = false; arrowShake = 0; ticksInAir = 0; damage = 2D; arrowCritical = false; setSize(0.5F, 0.5F); } public EntityBullet(World par1World, double par2, double par4, double par6) { super(par1World); xTile = -1; yTile = -1; zTile = -1; inTile = 0; inData = 0; inGround = false; doesArrowBelongToPlayer = false; arrowShake = 0; ticksInAir = 0; damage = 2D; arrowCritical = false; setSize(0.5F, 0.5F); setPosition(par2, par4, par6); yOffset = 0.0F; } public EntityBullet(World par1World, EntityLiving par2EntityLiving, EntityLiving par3EntityLiving, float par4, float par5) { super(par1World); xTile = -1; yTile = -1; zTile = -1; inTile = 0; inData = 0; inGround = false; doesArrowBelongToPlayer = false; arrowShake = 0; ticksInAir = 0; damage = 2D; arrowCritical = false; shootingEntity = par2EntityLiving; doesArrowBelongToPlayer = par2EntityLiving instanceof EntityPlayer; posY = (par2EntityLiving.posY + (double)par2EntityLiving.getEyeHeight()) - 0.10000000149011612D; double d = par3EntityLiving.posX - par2EntityLiving.posX; double d1 = (par3EntityLiving.posY + (double)par3EntityLiving.getEyeHeight()) - 0.69999998807907104D - posY; double d2 = par3EntityLiving.posZ - par2EntityLiving.posZ; double d3 = MathHelper.sqrt_double(d * d + d2 * d2); if (d3 < 9.9999999999999995E-008D) { return; } else { float f = (float)((Math.atan2(d2, d) * 180D) / Math.PI) - 90F; float f1 = (float)(-((Math.atan2(d1, d3) * 180D) / Math.PI)); double d4 = d / d3; double d5 = d2 / d3; setLocationAndAngles(par2EntityLiving.posX + d4, posY, par2EntityLiving.posZ + d5, f, f1); yOffset = 0.0F; float f2 = (float)d3 * 0.2F; setArrowHeading(d, d1 + (double)f2, d2, par4, par5); return; } } public EntityBullet(World par1World, EntityLiving par2EntityLiving, float par3) { super(par1World); xTile = -1; yTile = -1; zTile = -1; inTile = 0; inData = 0; inGround = false; doesArrowBelongToPlayer = false; arrowShake = 0; ticksInAir = 0; damage = 2D; arrowCritical = false; shootingEntity = par2EntityLiving; doesArrowBelongToPlayer = par2EntityLiving instanceof EntityPlayer; setSize(0.5F, 0.5F); setLocationAndAngles(par2EntityLiving.posX, par2EntityLiving.posY + (double)par2EntityLiving.getEyeHeight(), par2EntityLiving.posZ, par2EntityLiving.rotationYaw, par2EntityLiving.rotationPitch); posX -= MathHelper.cos((rotationYaw / 180F) * (float)Math.PI) * 0.16F; posY -= 0.10000000149011612D; posZ -= MathHelper.sin((rotationYaw / 180F) * (float)Math.PI) * 0.16F; setPosition(posX, posY, posZ); yOffset = 0.0F; motionX = -MathHelper.sin((rotationYaw / 180F) * (float)Math.PI) * MathHelper.cos((rotationPitch / 180F) * (float)Math.PI); motionZ = MathHelper.cos((rotationYaw / 180F) * (float)Math.PI) * MathHelper.cos((rotationPitch / 180F) * (float)Math.PI); motionY = -MathHelper.sin((rotationPitch / 180F) * (float)Math.PI); setArrowHeading(motionX, motionY, motionZ, par3 * 1.5F, 1.0F); } protected void entityInit() { } /** * Uses the provided coordinates as a heading and determines the velocity from it with the set force and random * variance. Args: x, y, z, force, forceVariation */ public void setArrowHeading(double par1, double par3, double par5, float par7, float par8) { float f = MathHelper.sqrt_double(par1 * par1 + par3 * par3 + par5 * par5); par1 /= f; par3 /= f; par5 /= f; par1 += rand.nextGaussian() * 0.0074999998323619366D * (double)par8; par3 += rand.nextGaussian() * 0.0074999998323619366D * (double)par8; par5 += rand.nextGaussian() * 0.0074999998323619366D * (double)par8; par1 *= par7; par3 *= par7; par5 *= par7; motionX = par1; motionY = par3; motionZ = par5; float f1 = MathHelper.sqrt_double(par1 * par1 + par5 * par5); prevRotationYaw = rotationYaw = (float)((Math.atan2(par1, par5) * 180D) / Math.PI); prevRotationPitch = rotationPitch = (float)((Math.atan2(par3, f1) * 180D) / Math.PI); ticksInGround = 0; } /** * Sets the velocity to the args. Args: x, y, z */ public void setVelocity(double par1, double par3, double par5) { motionX = par1; motionY = par3; motionZ = par5; if (prevRotationPitch == 0.0F && prevRotationYaw == 0.0F) { float f = MathHelper.sqrt_double(par1 * par1 + par5 * par5); prevRotationYaw = rotationYaw = (float)((Math.atan2(par1, par5) * 180D) / Math.PI); prevRotationPitch = rotationPitch = (float)((Math.atan2(par3, f) * 180D) / Math.PI); prevRotationPitch = rotationPitch; prevRotationYaw = rotationYaw; setLocationAndAngles(posX, posY, posZ, rotationYaw, rotationPitch); ticksInGround = 0; } } /** * Called to update the entity's position/logic. */ public void onUpdate() { super.onUpdate(); if (prevRotationPitch == 0.0F && prevRotationYaw == 0.0F) { float f = MathHelper.sqrt_double(motionX * motionX + motionZ * motionZ); prevRotationYaw = rotationYaw = (float)((Math.atan2(motionX, motionZ) * 180D) / Math.PI); prevRotationPitch = rotationPitch = (float)((Math.atan2(motionY, f) * 180D) / Math.PI); } int i = worldObj.getBlockId(xTile, yTile, zTile); if (i > 0) { Block.blocksList[i].setBlockBoundsBasedOnState(worldObj, xTile, yTile, zTile); AxisAlignedBB axisalignedbb = Block.blocksList[i].getCollisionBoundingBoxFromPool(worldObj, xTile, yTile, zTile); if (axisalignedbb != null && axisalignedbb.isVecInside(Vec3D.createVector(posX, posY, posZ))) { inGround = true; } } if (arrowShake > 0) { arrowShake--; } if (inGround) { int j = worldObj.getBlockId(xTile, yTile, zTile); int k = worldObj.getBlockMetadata(xTile, yTile, zTile); if (j != inTile || k != inData) { inGround = false; motionX *= rand.nextFloat() * 0.2F; motionY *= rand.nextFloat() * 0.2F; motionZ *= rand.nextFloat() * 0.2F; ticksInGround = 0; ticksInAir = 0; return; } ticksInGround++; if (ticksInGround == 1200) { setDead(); } return; } ticksInAir++; Vec3D vec3d = Vec3D.createVector(posX, posY, posZ); Vec3D vec3d1 = Vec3D.createVector(posX + motionX, posY + motionY, posZ + motionZ); MovingObjectPosition movingobjectposition = worldObj.rayTraceBlocks_do_do(vec3d, vec3d1, false, true); vec3d = Vec3D.createVector(posX, posY, posZ); vec3d1 = Vec3D.createVector(posX + motionX, posY + motionY, posZ + motionZ); if (movingobjectposition != null) { vec3d1 = Vec3D.createVector(movingobjectposition.hitVec.xCoord, movingobjectposition.hitVec.yCoord, movingobjectposition.hitVec.zCoord); } Entity entity = null; List list = worldObj.getEntitiesWithinAABBExcludingEntity(this, boundingBox.addCoord(motionX, motionY, motionZ).expand(1.0D, 1.0D, 1.0D)); double d = 0.0D; for (int l = 0; l < list.size(); l++) { Entity entity1 = (Entity)list.get(l); if (!entity1.canBeCollidedWith() || entity1 == shootingEntity && ticksInAir < 5) { continue; } float f5 = 0.3F; AxisAlignedBB axisalignedbb1 = entity1.boundingBox.expand(f5, f5, f5); MovingObjectPosition movingobjectposition1 = axisalignedbb1.calculateIntercept(vec3d, vec3d1); if (movingobjectposition1 == null) { continue; } double d1 = vec3d.distanceTo(movingobjectposition1.hitVec); if (d1 < d || d == 0.0D) { entity = entity1; d = d1; } } if (entity != null) { movingobjectposition = new MovingObjectPosition(entity); } if (movingobjectposition != null) { if (movingobjectposition.entityHit != null) { float f1 = MathHelper.sqrt_double(motionX * motionX + motionY * motionY + motionZ * motionZ); int j1 = (int)Math.ceil((double)f1 * damage); if (arrowCritical) { j1 += rand.nextInt(j1 / 2 + 2); } DamageSource damagesource = null; if (shootingEntity == null) { damagesource = DamageSource.causeBulletDamage(this, this); } else { damagesource = DamageSource.causeBulletDamage(this, shootingEntity); } if (isBurning()) { movingobjectposition.entityHit.setFire(5); } if (movingobjectposition.entityHit.attackEntityFrom(damagesource, j1)) { if (movingobjectposition.entityHit instanceof EntityLiving) { ((EntityLiving)movingobjectposition.entityHit).arrowHitTempCounter++; if (field_46027_au > 0) { float f7 = MathHelper.sqrt_double(motionX * motionX + motionZ * motionZ); if (f7 > 0.0F) { movingobjectposition.entityHit.addVelocity((motionX * (double)field_46027_au * 0.60000002384185791D) / (double)f7, 0.10000000000000001D, (motionZ * (double)field_46027_au * 0.60000002384185791D) / (double)f7); } } } worldObj.playSoundAtEntity(this, "random.bowhit", 1.0F, 1.2F / (rand.nextFloat() * 0.2F + 0.9F)); setDead(); } else { motionX *= -0.10000000149011612D; motionY *= -0.10000000149011612D; motionZ *= -0.10000000149011612D; rotationYaw += 180F; prevRotationYaw += 180F; ticksInAir = 0; } } else { xTile = movingobjectposition.blockX; yTile = movingobjectposition.blockY; zTile = movingobjectposition.blockZ; inTile = worldObj.getBlockId(xTile, yTile, zTile); inData = worldObj.getBlockMetadata(xTile, yTile, zTile); motionX = (float)(movingobjectposition.hitVec.xCoord - posX); motionY = (float)(movingobjectposition.hitVec.yCoord - posY); motionZ = (float)(movingobjectposition.hitVec.zCoord - posZ); float f2 = MathHelper.sqrt_double(motionX * motionX + motionY * motionY + motionZ * motionZ); posX -= (motionX / (double)f2) * 0.05000000074505806D; posY -= (motionY / (double)f2) * 0.05000000074505806D; posZ -= (motionZ / (double)f2) * 0.05000000074505806D; worldObj.playSoundAtEntity(this, "random.bowhit", 1.0F, 1.2F / (rand.nextFloat() * 0.2F + 0.9F)); inGround = true; arrowShake = 7; arrowCritical = false; } } if (arrowCritical) { for (int i1 = 0; i1 < 4; i1++) { worldObj.spawnParticle("crit", posX + (motionX * (double)i1) / 4D, posY + (motionY * (double)i1) / 4D, posZ + (motionZ * (double)i1) / 4D, -motionX, -motionY + 0.20000000000000001D, -motionZ); } } posX += motionX; posY += motionY; posZ += motionZ; float f3 = MathHelper.sqrt_double(motionX * motionX + motionZ * motionZ); rotationYaw = (float)((Math.atan2(motionX, motionZ) * 180D) / Math.PI); for (rotationPitch = (float)((Math.atan2(motionY, f3) * 180D) / Math.PI); rotationPitch - prevRotationPitch < -180F; prevRotationPitch -= 360F) { } for (; rotationPitch - prevRotationPitch >= 180F; prevRotationPitch += 360F) { } for (; rotationYaw - prevRotationYaw < -180F; prevRotationYaw -= 360F) { } for (; rotationYaw - prevRotationYaw >= 180F; prevRotationYaw += 360F) { } rotationPitch = prevRotationPitch + (rotationPitch - prevRotationPitch) * 0.2F; rotationYaw = prevRotationYaw + (rotationYaw - prevRotationYaw) * 0.2F; float f4 = 0.99F; float f6 = 0.05F; if (isInWater()) { for (int k1 = 0; k1 < 4; k1++) { float f8 = 0.25F; worldObj.spawnParticle("bubble", posX - motionX * (double)f8, posY - motionY * (double)f8, posZ - motionZ * (double)f8, motionX, motionY, motionZ); } f4 = 0.8F; } motionX *= f4; motionY *= f4; motionZ *= f4; motionY -= f6; setPosition(posX, posY, posZ); } /** * (abstract) Protected helper method to write subclass entity data to NBT. */ public void writeEntityToNBT(NBTTagCompound par1NBTTagCompound) { par1NBTTagCompound.setShort("xTile", (short)xTile); par1NBTTagCompound.setShort("yTile", (short)yTile); par1NBTTagCompound.setShort("zTile", (short)zTile); par1NBTTagCompound.setByte("inTile", (byte)inTile); par1NBTTagCompound.setByte("inData", (byte)inData); par1NBTTagCompound.setByte("shake", (byte)arrowShake); par1NBTTagCompound.setByte("inGround", (byte)(inGround ? 1 : 0)); par1NBTTagCompound.setBoolean("player", doesArrowBelongToPlayer); par1NBTTagCompound.setDouble("damage", damage); } /** * (abstract) Protected helper method to read subclass entity data from NBT. */ public void readEntityFromNBT(NBTTagCompound par1NBTTagCompound) { xTile = par1NBTTagCompound.getShort("xTile"); yTile = par1NBTTagCompound.getShort("yTile"); zTile = par1NBTTagCompound.getShort("zTile"); inTile = par1NBTTagCompound.getByte("inTile") & 0xff; inData = par1NBTTagCompound.getByte("inData") & 0xff; arrowShake = par1NBTTagCompound.getByte("shake") & 0xff; inGround = par1NBTTagCompound.getByte("inGround") == 1; doesArrowBelongToPlayer = par1NBTTagCompound.getBoolean("player"); if (par1NBTTagCompound.hasKey("damage")) { damage = par1NBTTagCompound.getDouble("damage"); } } /** * Called by a player entity when they collide with an entity */ public void onCollideWithPlayer(EntityPlayer par1EntityPlayer) { if (worldObj.isRemote) { return; } if (inGround && doesArrowBelongToPlayer && arrowShake <= 0 && par1EntityPlayer.inventory.addItemStackToInventory(new ItemStack(Item.arrow, 1))) { worldObj.playSoundAtEntity(this, "random.pop", 0.2F, ((rand.nextFloat() - rand.nextFloat()) * 0.7F + 1.0F) * 2.0F); par1EntityPlayer.onItemPickup(this, 1); setDead(); } } public float getShadowSize() { return 0.0F; } public void setDamage(double par1) { damage = par1; } public double getDamage() { return damage; } public void func_46023_b(int par1) { field_46027_au = par1; } /** * If returns false, the item will not inflict any damage against entities. */ public boolean canAttackWithItem() { return false; } }ERROR:
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NOTHING. Thats my problem...
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TileEntityCompactor
package net.minecraft.src; public class TileEntityCompactor extends TileEntity implements IInventory{ public ItemStack compactorItemStacks[]; public TileEntityCompactor(){ compactorItemStacks = new ItemStack[4]; } public int getSizeInventory() { return compactorItemStacks.length; } public ItemStack getStackInSlot(int i) { return compactorItemStacks[i]; } public ItemStack decrStackSize(int i, int j) { if (compactorItemStacks[i] != null) { if (compactorItemStacks[i].stackSize <= j) { ItemStack itemstack = compactorItemStacks[i]; compactorItemStacks[i] = null; return itemstack; } ItemStack itemstack1 = compactorItemStacks[i].splitStack(j); if (compactorItemStacks[i].stackSize == 0) { compactorItemStacks[i] = null; } return itemstack1; } else { return null; } } public void setInventorySlotContents(int i, ItemStack itemstack) { compactorItemStacks[i] = itemstack; if (itemstack != null && itemstack.stackSize > getInventoryStackLimit()) { itemstack.stackSize = getInventoryStackLimit(); } } public String getInvName() { return "meh"; } public int getInventoryStackLimit() { // TODO Auto-generated method stub return 64; } public void openChest() { } public void closeChest() { // TODO Auto-generated method stub } public boolean copper = false; public boolean tin = false; public void updateEntity() { ItemStack itemstack = compactorItemStacks[0]; ItemStack itemstack1 = compactorItemStacks[1]; ItemStack itemstack2 = compactorItemStacks[2]; if (itemstack != null) { int i = itemstack.getItem().shiftedIndex; if(i == Item.stick.shiftedIndex) { copper = true; } } if (itemstack1 != null) { int i = itemstack.getItem().shiftedIndex; if(i == Item.book.shiftedIndex) { tin = true; } } } public boolean isUseableByPlayer(EntityPlayer entityplayer) { if(worldObj.getBlockTileEntity(xCoord, yCoord, zCoord) != this) { return false; } return entityplayer.getDistanceSq((double)xCoord + 0.5D, (double)yCoord + 0.5D, (double)zCoord + 0.5D) <= 64D; } public ItemStack getStackInSlotOnClosing(int i) { // TODO Auto-generated method stub return null; } }Error Report
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Ok, thank you for the reply but im a bit new to gui so could you maybe explain that a bit more indepth?