[1.5.2] How to make a block show the texture of the block it's touching?

AskHow1248 · September 14, 2013

I'm trying to make a block that blends in with it's surroundings, like a Ars Magica Illusion Block or a secret Rooms Mod Camo Block. I have absolutely no idea how to go about this. Any help would be appreciated.

update: I think it might have something to do with the getBlockTexture method in the Block class.

TheGreyGhost · September 14, 2013

Hi.

I would suggest writing some custom rendering code for your block that looks to see what the adjacent block is and either copies its texture, or calls the rendering code for that block directly.

A couple of keywords to search for:

ISimpleBlockRenderingHandler and

RenderBlocks.renderBlockByRenderType and

Block.getIcon

This link might help to understand how block rendering works:

http://greyminecraftcoder.blogspot.com.au/2013/07/block-rendering.html

with more detail:

http://greyminecraftcoder.blogspot.com.au/p/list-of-topics.html

Cheers TGG

Lycanus Darkbinder · September 14, 2013

Even simpler, you could create a TileEntity when the block is placed and simply store the Icon of the block next to it. Then override getBlockTexture() and return the icon stored in the TileEntity.

Hint:

        int ID = world.getBlockId(x, y+1, z); // change this as needed, maybe x+1, y-1, etc.
        int meta = world.getBlockMetadata(x, y+1, z); // change this as needed, maybe x+1, y-1, etc.
        int side = 0; // change this as needed
        
        // Icon ico = Block.blocksList[iD].getIcon(side, meta); // Use for blocks in hand / Creative tab
        Icon ico = Block.blocksList[iD].getBlockTexture(IBlockAccess, x, y, z, side); // Use for blocks placed in world

Edit:

modified example to include getBlockTexture()

AskHow1248 · September 14, 2013

Thank you. What I'm going to try is to create a tileEntity and make a method in the tileEntity class to find the block i want to model. In the block class I'll make the texture of the block be the getIcon of the block I'm going to model.

AskHow1248 · September 14, 2013

Update: dose anyone know how to get a block from it's id, or cords in a world.

Lycanus Darkbinder · September 14, 2013

Update: dose anyone know how to get a block from it's id, or cords in a world.

Did you read my hint three posts above?

AskHow1248 · September 15, 2013

another update: I have a method to get the block i wand to model, but am not sure what to do from there. Is there a way to get and use the texture of a whole block (getIcon uses sides)?

Lycanus Darkbinder · September 15, 2013

another update: I have a method to get the block i wand to model, but am not sure what to do from there. Is there a way to get and use the texture of a whole block (getIcon uses sides)?

getIcon() and getBlockTexture() use sides because of the multi-texture capability of blocks. You can get around this pretty simply though by incrementing the side and storing the result in an array.

Note: In your case you really want getBlockTexture() which is called for blocks in the world, getIcon() is called for blocks in your inventory and Creative tabs.

Here's some rough code:

Icon blockTextures[6];    // All blocks have 6 sides
int blockID = 0;  // you will need to get this by adapting my hint above

for (int side = 0; side < blockTextures.length; side++)
{
    blockTextures[side] = Block.blocksList[blockID].getBlockTexture(IBlockAccess, x, y, z, side);
}

Then when you override getBlockTexture() for your block you can return an array element based on the side the function is requesting.

If you don't want to mess with arrays, you could concievably just return the Icon from the block next to yours by using the opposite side. If the game is asking for (side=1) of your block then it would be (side=0) of the neighboring block that is touching your block so return its Icon instead.

AskHow1248 · September 15, 2013

How do I tell minecraft what texture to use.

AskHow1248 · September 15, 2013

I think I have the texture code working but when I try to place an Illusion Block I get a ClassCastException.

Code:

Main Class:

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package RickyRyan.mod.SmokeAndMirrors.common;

import RickyRyan.mod.SmokeAndMirrors.Block.BlockIllusionBlock;

import net.minecraft.block.Block;

import net.minecraft.block.material.Material;

import net.minecraft.creativetab.CreativeTabs;

import net.minecraft.item.Item;

import net.minecraftforge.common.MinecraftForge;

import cpw.mods.fml.common.Mod;

import cpw.mods.fml.common.Mod.Init;

import cpw.mods.fml.common.event.FMLInitializationEvent;

import cpw.mods.fml.common.network.NetworkMod;

import cpw.mods.fml.common.registry.GameRegistry;

import cpw.mods.fml.common.registry.LanguageRegistry;

@Mod(modid = "SmokeAndMirrors", name = "SmokeAndMirrors", version = "pre 1.0")

@NetworkMod(clientSideRequired = true, serverSideRequired = false)

public class SmokeAndMirrors {

public static Block IllusionBlock;

@Init

public void load(FMLInitializationEvent event) {

IllusionBlock = new BlockIllusionBlock(3000, Material.rock).setUnlocalizedName("IllusionBlock").setCreativeTab(CreativeTabs.tabBlock).setHardness(10.0F).setResistance(1000.0F);

GameRegistry.registerTileEntity(RickyRyan.mod.SmokeAndMirrors.TileEntity.TileEntityIllusionBlock.class, "stringID");

MinecraftForge.setBlockHarvestLevel(IllusionBlock, "pickaxe", 2);

GameRegistry.registerBlock(IllusionBlock);

LanguageRegistry.addName(IllusionBlock, "Illusion Block");

}

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Block (IllusionBlock):

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package RickyRyan.mod.SmokeAndMirrors.Block;

import RickyRyan.mod.SmokeAndMirrors.TileEntity.TileEntityIllusionBlock;

import net.minecraft.block.Block;

import net.minecraft.block.material.Material;

import net.minecraft.client.renderer.texture.IconRegister;

import net.minecraft.tileentity.TileEntity;

import net.minecraft.util.AxisAlignedBB;

import net.minecraft.util.Icon;

import net.minecraft.world.IBlockAccess;

import net.minecraft.world.World;

public class BlockIllusionBlock extends Block {

public BlockIllusionBlock(int par1, Material par2Material) {

super(par1, par2Material);

setBlockBounds(0F, 0F, 0F, 1F, 1F, 1F);

}

public TileEntity createTileEntity(World world, int metadata)

{

return new TileEntityIllusionBlock();

}

@Override

public Icon getBlockTexture(IBlockAccess par1IBlockAccess, int par2, int par3, int par4, int par5) {

TileEntity tile = createTileEntity((World)par1IBlockAccess, 1);

if(tile != null) {

Icon[] IconArray = ((TileEntityIllusionBlock) tile).getTextureToModel(par2, par3, par4);

return IconArray[par5];

} else {

return null;

}

public AxisAlignedBB getCollisionBoundingBoxFromPool(World world, int i, int j, int k)

{

return null;

}

public boolean isOpaqueCube()

{

return false;

}

//look into getBlockTexture in Block

public boolean renderAsNormalBlock()

{

return false;

}

public int getRenderType()

{

return 0;

}

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TileEntity:

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package RickyRyan.mod.SmokeAndMirrors.TileEntity;

import java.math.*;

import java.util.ArrayList;

import net.minecraft.block.Block;

import net.minecraft.client.renderer.texture.Texture;

import net.minecraft.entity.player.EntityPlayer;

import net.minecraft.nbt.NBTTagCompound;

import net.minecraft.tileentity.TileEntity;

import net.minecraft.util.Icon;

public class TileEntityIllusionBlock extends TileEntity{

private int x = this.xCoord;

private int y = this.yCoord;

private int z = this.zCoord;

@Override

public void writeToNBT(NBTTagCompound par1)

{

super.writeToNBT(par1);

//par1.setInteger("customField", customField);

par1.setInteger("xCord", x);

par1.setInteger("yCord", y);

par1.setInteger("zCord", z);

}

@Override

public void readFromNBT(NBTTagCompound par1)

{

super.readFromNBT(par1);

//this.customField = par1.getInteger("customField");

this.x = par1.getInteger("xCord");

this.y = par1.getInteger("yCord");

this.z = par1.getInteger("zCord");

}

public Icon[] getTextureToModel(int x, int y, int z) {

Block blockToModel = null;

Icon side1 = null;

Icon side2 = null;

Icon side3 = null;

Icon side4 = null;

Icon side5 = null;

Icon side6 = null;

if (!worldObj.isAirBlock((int)(x + 1), (int)(y), (int)(z))) {

int blockId = worldObj.getBlockId((int)(x + 1), (int)(y), (int)(z));

blockToModel = Block.blocksList[blockId];

side1 = blockToModel.getBlockTexture(worldObj, x + 1, y, z, 1);

side2 = blockToModel.getBlockTexture(worldObj, x + 1, y, z, 2);

side3 = blockToModel.getBlockTexture(worldObj, x + 1, y, z, 3);

side4 = blockToModel.getBlockTexture(worldObj, x + 1, y, z, 4);

side5 = blockToModel.getBlockTexture(worldObj, x + 1, y, z, 5);

side6 = blockToModel.getBlockTexture(worldObj, x + 1, y, z, 6);

} else if (!worldObj.isAirBlock((int)(x - 1), (int)(y), (int)(z))) {

int blockId = worldObj.getBlockId((int)(x - 1), (int)(y), (int)(z));

blockToModel = Block.blocksList[blockId];

side1 = blockToModel.getBlockTexture(worldObj, x - 1, y, z, 1);

side2 = blockToModel.getBlockTexture(worldObj, x - 1, y, z, 2);

side3 = blockToModel.getBlockTexture(worldObj, x - 1, y, z, 3);

side4 = blockToModel.getBlockTexture(worldObj, x - 1, y, z, 4);

side5 = blockToModel.getBlockTexture(worldObj, x - 1, y, z, 5);

side6 = blockToModel.getBlockTexture(worldObj, x - 1, y, z, 6);

} else if (!worldObj.isAirBlock((int)(x), (int)(y + 1), (int)(z))) {

int blockId = worldObj.getBlockId((int)(x), (int)(y + 1), (int)(z));

blockToModel = Block.blocksList[blockId];

side1 = blockToModel.getBlockTexture(worldObj, x, y + 1, z, 1);

side2 = blockToModel.getBlockTexture(worldObj, x, y + 1, z, 2);

side3 = blockToModel.getBlockTexture(worldObj, x, y + 1, z, 3);

side4 = blockToModel.getBlockTexture(worldObj, x, y + 1, z, 4);

side5 = blockToModel.getBlockTexture(worldObj, x, y + 1, z, 5);

side6 = blockToModel.getBlockTexture(worldObj, x, y + 1, z, 6);

} else if (!worldObj.isAirBlock((int)(x), (int)(y - 1), (int)(z))) {

int blockId = worldObj.getBlockId((int)(x), (int)(y - 1), (int)(z));

blockToModel = Block.blocksList[blockId];

side1 = blockToModel.getBlockTexture(worldObj, x, y - 1, z, 1);

side2 = blockToModel.getBlockTexture(worldObj, x, y - 1, z, 2);

side3 = blockToModel.getBlockTexture(worldObj, x, y - 1, z, 3);

side4 = blockToModel.getBlockTexture(worldObj, x, y - 1, z, 4);

side5 = blockToModel.getBlockTexture(worldObj, x, y - 1, z, 5);

side6 = blockToModel.getBlockTexture(worldObj, x, y - 1, z, 6);

} else if (!worldObj.isAirBlock((int)(x), (int)(y), (int)(z + 1))) {

int blockId = worldObj.getBlockId((int)(x), (int)(y), (int)(z + 1));

blockToModel = Block.blocksList[blockId];

side1 = blockToModel.getBlockTexture(worldObj, x, y, z + 1, 1);

side2 = blockToModel.getBlockTexture(worldObj, x, y, z + 1, 2);

side3 = blockToModel.getBlockTexture(worldObj, x, y, z + 1, 3);

side4 = blockToModel.getBlockTexture(worldObj, x, y, z + 1, 4);

side5 = blockToModel.getBlockTexture(worldObj, x, y, z + 1, 5);

side6 = blockToModel.getBlockTexture(worldObj, x, y, z + 1, 6);

} else if (!worldObj.isAirBlock((int)(x), (int)(y), (int)(z - 1))) {

int blockId = worldObj.getBlockId((int)(x), (int)(y), (int)(z - 1));

blockToModel = Block.blocksList[blockId];

side1 = blockToModel.getBlockTexture(worldObj, x, y, z - 1, 1);

side2 = blockToModel.getBlockTexture(worldObj, x, y, z - 1, 2);

side3 = blockToModel.getBlockTexture(worldObj, x, y, z - 1, 3);

side4 = blockToModel.getBlockTexture(worldObj, x, y, z - 1, 4);

side5 = blockToModel.getBlockTexture(worldObj, x, y, z - 1, 5);

side6 = blockToModel.getBlockTexture(worldObj, x, y, z - 1, 6);

} else {

int xToCheck = x + 1;

int yToCheck = y;

int zToCheck = z + 0;

do {

xToCheck = x + 1;

yToCheck = y;

zToCheck = z + 0;

if (!worldObj.isAirBlock((int)(xToCheck), (int)(yToCheck), (int)(zToCheck))) {

int blockId = worldObj.getBlockId((int)(x), (int)(y), (int)(z - 1));

blockToModel = Block.blocksList[blockId];

side1 = blockToModel.getBlockTexture(worldObj, xToCheck, yToCheck, zToCheck, 1);

side2 = blockToModel.getBlockTexture(worldObj, xToCheck, yToCheck, zToCheck, 2);

side3 = blockToModel.getBlockTexture(worldObj, xToCheck, yToCheck, zToCheck, 3);

side4 = blockToModel.getBlockTexture(worldObj, xToCheck, yToCheck, zToCheck, 4);

side5 = blockToModel.getBlockTexture(worldObj, xToCheck, yToCheck, zToCheck, 5);

side6 = blockToModel.getBlockTexture(worldObj, xToCheck, yToCheck, zToCheck, 6);

}

} while (!worldObj.isAirBlock((int)(xToCheck), (int)(yToCheck), (int)(zToCheck)));

}

Icon[] IconArray = {side1, side2, side3, side4, side5, side6};

return IconArray;

}

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Forge Error Log:

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---- Minecraft Crash Report ----

// Sorry

Time: 9/14/13 8:04 PM

Description: Unexpected error

java.lang.ClassCastException: net.minecraft.world.ChunkCache cannot be cast to net.minecraft.world.World

at RickyRyan.mod.SmokeAndMirrors.Block.BlockIllusionBlock.getBlockTexture(BlockIllusionBlock.java:28)

at net.minecraft.client.renderer.RenderBlocks.getBlockIcon(RenderBlocks.java:8141)

at net.minecraft.client.renderer.RenderBlocks.renderStandardBlockWithAmbientOcclusion(RenderBlocks.java:4468)

at net.minecraft.client.renderer.RenderBlocks.renderStandardBlock(RenderBlocks.java:4163)

at net.minecraft.client.renderer.RenderBlocks.renderBlockByRenderType(RenderBlocks.java:445)

at net.minecraft.client.renderer.WorldRenderer.updateRenderer(WorldRenderer.java:226)

at net.minecraft.client.renderer.RenderGlobal.updateRenderers(RenderGlobal.java:1535)

at net.minecraft.client.renderer.EntityRenderer.renderWorld(EntityRenderer.java:1119)

at net.minecraft.client.renderer.EntityRenderer.updateCameraAndRender(EntityRenderer.java:991)

at net.minecraft.client.Minecraft.runGameLoop(Minecraft.java:871)

at net.minecraft.client.Minecraft.run(Minecraft.java:760)

at java.lang.Thread.run(Unknown Source)

A detailed walkthrough of the error, its code path and all known details is as follows:

---------------------------------------------------------------------------------------

-- Head --

Stacktrace: