    001package net.minecraft.block;
    002
    003import cpw.mods.fml.relauncher.Side;
    004import cpw.mods.fml.relauncher.SideOnly;
    005import java.util.List;
    006import java.util.Random;
    007import net.minecraft.block.material.Material;
    008import net.minecraft.client.renderer.texture.IconRegister;
    009import net.minecraft.entity.Entity;
    010import net.minecraft.util.AxisAlignedBB;
    011import net.minecraft.util.Facing;
    012import net.minecraft.util.Icon;
    013import net.minecraft.world.IBlockAccess;
    014import net.minecraft.world.World;
    015
    016public class BlockPistonExtension extends Block
    017{
    018    /** The texture for the 'head' of the piston. Sticky or normal. */
    019    private Icon headTexture = null;
    020
    021    public BlockPistonExtension(int par1)
    022    {
    023        super(par1, Material.piston);
    024        this.setStepSound(soundStoneFootstep);
    025        this.setHardness(0.5F);
    026    }
    027
    028    @SideOnly(Side.CLIENT)
    029    public void setHeadTexture(Icon par1Icon)
    030    {
    031        this.headTexture = par1Icon;
    032    }
    033
    034    /**
    035     * ejects contained items into the world, and notifies neighbours of an update, as appropriate
    036     */
    037    public void breakBlock(World par1World, int par2, int par3, int par4, int par5, int par6)
    038    {
    039        super.breakBlock(par1World, par2, par3, par4, par5, par6);
    040        int j1 = Facing.faceToSide[getDirectionMeta(par6)];
    041        par2 += Facing.offsetsXForSide[j1];
    042        par3 += Facing.offsetsYForSide[j1];
    043        par4 += Facing.offsetsZForSide[j1];
    044        int k1 = par1World.getBlockId(par2, par3, par4);
    045
    046        if (k1 == Block.pistonBase.blockID || k1 == Block.pistonStickyBase.blockID)
    047        {
    048            par6 = par1World.getBlockMetadata(par2, par3, par4);
    049
    050            if (BlockPistonBase.isExtended(par6))
    051            {
    052                Block.blocksList[k1].dropBlockAsItem(par1World, par2, par3, par4, par6, 0);
    053                par1World.func_94571_i(par2, par3, par4);
    054            }
    055        }
    056    }
    057
    058    @SideOnly(Side.CLIENT)
    059    public void clearHeadTexture()
    060    {
    061        this.headTexture = null;
    062    }
    063
    064    @SideOnly(Side.CLIENT)
    065
    066    /**
    067     * From the specified side and block metadata retrieves the blocks texture. Args: side, metadata
    068     */
    069    public Icon getBlockTextureFromSideAndMetadata(int par1, int par2)
    070    {
    071        int k = getDirectionMeta(par2);
    072        return par1 == k ? (this.headTexture != null ? this.headTexture : ((par2 & 8) != 0 ? BlockPistonBase.func_94496_b("piston_top_sticky") : BlockPistonBase.func_94496_b("piston_top"))) : (k < 6 && par1 == Facing.faceToSide[k] ? BlockPistonBase.func_94496_b("piston_top") : BlockPistonBase.func_94496_b("piston_side"));
    073    }
    074
    075    @SideOnly(Side.CLIENT)
    076    public void func_94332_a(IconRegister par1IconRegister) {}
    077
    078    /**
    079     * The type of render function that is called for this block
    080     */
    081    public int getRenderType()
    082    {
    083        return 17;
    084    }
    085
    086    /**
    087     * Is this block (a) opaque and (b) a full 1m cube?  This determines whether or not to render the shared face of two
    088     * adjacent blocks and also whether the player can attach torches, redstone wire, etc to this block.
    089     */
    090    public boolean isOpaqueCube()
    091    {
    092        return false;
    093    }
    094
    095    /**
    096     * If this block doesn't render as an ordinary block it will return False (examples: signs, buttons, stairs, etc)
    097     */
    098    public boolean renderAsNormalBlock()
    099    {
    100        return false;
    101    }
    102
    103    /**
    104     * Checks to see if its valid to put this block at the specified coordinates. Args: world, x, y, z
    105     */
    106    public boolean canPlaceBlockAt(World par1World, int par2, int par3, int par4)
    107    {
    108        return false;
    109    }
    110
    111    /**
    112     * checks to see if you can place this block can be placed on that side of a block: BlockLever overrides
    113     */
    114    public boolean canPlaceBlockOnSide(World par1World, int par2, int par3, int par4, int par5)
    115    {
    116        return false;
    117    }
    118
    119    /**
    120     * Returns the quantity of items to drop on block destruction.
    121     */
    122    public int quantityDropped(Random par1Random)
    123    {
    124        return 0;
    125    }
    126
    127    /**
    128     * Adds all intersecting collision boxes to a list. (Be sure to only add boxes to the list if they intersect the
    129     * mask.) Parameters: World, X, Y, Z, mask, list, colliding entity
    130     */
    131    public void addCollisionBoxesToList(World par1World, int par2, int par3, int par4, AxisAlignedBB par5AxisAlignedBB, List par6List, Entity par7Entity)
    132    {
    133        int l = par1World.getBlockMetadata(par2, par3, par4);
    134
    135        switch (getDirectionMeta(l))
    136        {
    137            case 0:
    138                this.setBlockBounds(0.0F, 0.0F, 0.0F, 1.0F, 0.25F, 1.0F);
    139                super.addCollisionBoxesToList(par1World, par2, par3, par4, par5AxisAlignedBB, par6List, par7Entity);
    140                this.setBlockBounds(0.375F, 0.25F, 0.375F, 0.625F, 1.0F, 0.625F);
    141                super.addCollisionBoxesToList(par1World, par2, par3, par4, par5AxisAlignedBB, par6List, par7Entity);
    142                break;
    143            case 1:
    144                this.setBlockBounds(0.0F, 0.75F, 0.0F, 1.0F, 1.0F, 1.0F);
    145                super.addCollisionBoxesToList(par1World, par2, par3, par4, par5AxisAlignedBB, par6List, par7Entity);
    146                this.setBlockBounds(0.375F, 0.0F, 0.375F, 0.625F, 0.75F, 0.625F);
    147                super.addCollisionBoxesToList(par1World, par2, par3, par4, par5AxisAlignedBB, par6List, par7Entity);
    148                break;
    149            case 2:
    150                this.setBlockBounds(0.0F, 0.0F, 0.0F, 1.0F, 1.0F, 0.25F);
    151                super.addCollisionBoxesToList(par1World, par2, par3, par4, par5AxisAlignedBB, par6List, par7Entity);
    152                this.setBlockBounds(0.25F, 0.375F, 0.25F, 0.75F, 0.625F, 1.0F);
    153                super.addCollisionBoxesToList(par1World, par2, par3, par4, par5AxisAlignedBB, par6List, par7Entity);
    154                break;
    155            case 3:
    156                this.setBlockBounds(0.0F, 0.0F, 0.75F, 1.0F, 1.0F, 1.0F);
    157                super.addCollisionBoxesToList(par1World, par2, par3, par4, par5AxisAlignedBB, par6List, par7Entity);
    158                this.setBlockBounds(0.25F, 0.375F, 0.0F, 0.75F, 0.625F, 0.75F);
    159                super.addCollisionBoxesToList(par1World, par2, par3, par4, par5AxisAlignedBB, par6List, par7Entity);
    160                break;
    161            case 4:
    162                this.setBlockBounds(0.0F, 0.0F, 0.0F, 0.25F, 1.0F, 1.0F);
    163                super.addCollisionBoxesToList(par1World, par2, par3, par4, par5AxisAlignedBB, par6List, par7Entity);
    164                this.setBlockBounds(0.375F, 0.25F, 0.25F, 0.625F, 0.75F, 1.0F);
    165                super.addCollisionBoxesToList(par1World, par2, par3, par4, par5AxisAlignedBB, par6List, par7Entity);
    166                break;
    167            case 5:
    168                this.setBlockBounds(0.75F, 0.0F, 0.0F, 1.0F, 1.0F, 1.0F);
    169                super.addCollisionBoxesToList(par1World, par2, par3, par4, par5AxisAlignedBB, par6List, par7Entity);
    170                this.setBlockBounds(0.0F, 0.375F, 0.25F, 0.75F, 0.625F, 0.75F);
    171                super.addCollisionBoxesToList(par1World, par2, par3, par4, par5AxisAlignedBB, par6List, par7Entity);
    172        }
    173
    174        this.setBlockBounds(0.0F, 0.0F, 0.0F, 1.0F, 1.0F, 1.0F);
    175    }
    176
    177    /**
    178     * Updates the blocks bounds based on its current state. Args: world, x, y, z
    179     */
    180    public void setBlockBoundsBasedOnState(IBlockAccess par1IBlockAccess, int par2, int par3, int par4)
    181    {
    182        int l = par1IBlockAccess.getBlockMetadata(par2, par3, par4);
    183
    184        switch (getDirectionMeta(l))
    185        {
    186            case 0:
    187                this.setBlockBounds(0.0F, 0.0F, 0.0F, 1.0F, 0.25F, 1.0F);
    188                break;
    189            case 1:
    190                this.setBlockBounds(0.0F, 0.75F, 0.0F, 1.0F, 1.0F, 1.0F);
    191                break;
    192            case 2:
    193                this.setBlockBounds(0.0F, 0.0F, 0.0F, 1.0F, 1.0F, 0.25F);
    194                break;
    195            case 3:
    196                this.setBlockBounds(0.0F, 0.0F, 0.75F, 1.0F, 1.0F, 1.0F);
    197                break;
    198            case 4:
    199                this.setBlockBounds(0.0F, 0.0F, 0.0F, 0.25F, 1.0F, 1.0F);
    200                break;
    201            case 5:
    202                this.setBlockBounds(0.75F, 0.0F, 0.0F, 1.0F, 1.0F, 1.0F);
    203        }
    204    }
    205
    206    /**
    207     * Lets the block know when one of its neighbor changes. Doesn't know which neighbor changed (coordinates passed are
    208     * their own) Args: x, y, z, neighbor blockID
    209     */
    210    public void onNeighborBlockChange(World par1World, int par2, int par3, int par4, int par5)
    211    {
    212        int i1 = getDirectionMeta(par1World.getBlockMetadata(par2, par3, par4));
    213        int j1 = par1World.getBlockId(par2 - Facing.offsetsXForSide[i1], par3 - Facing.offsetsYForSide[i1], par4 - Facing.offsetsZForSide[i1]);
    214
    215        if (j1 != Block.pistonBase.blockID && j1 != Block.pistonStickyBase.blockID)
    216        {
    217            par1World.func_94571_i(par2, par3, par4);
    218        }
    219        else
    220        {
    221            Block.blocksList[j1].onNeighborBlockChange(par1World, par2 - Facing.offsetsXForSide[i1], par3 - Facing.offsetsYForSide[i1], par4 - Facing.offsetsZForSide[i1], par5);
    222        }
    223    }
    224
    225    public static int getDirectionMeta(int par0)
    226    {
    227        return par0 & 7;
    228    }
    229
    230    @SideOnly(Side.CLIENT)
    231
    232    /**
    233     * only called by clickMiddleMouseButton , and passed to inventory.setCurrentItem (along with isCreative)
    234     */
    235    public int idPicked(World par1World, int par2, int par3, int par4)
    236    {
    237        return 0;
    238    }
    239}