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.setBlockToAir(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
077    /**
078     * When this method is called, your block should register all the icons it needs with the given IconRegister. This
079     * is the only chance you get to register icons.
080     */
081    public void registerIcons(IconRegister par1IconRegister) {}
082
083    /**
084     * The type of render function that is called for this block
085     */
086    public int getRenderType()
087    {
088        return 17;
089    }
090
091    /**
092     * Is this block (a) opaque and (b) a full 1m cube?  This determines whether or not to render the shared face of two
093     * adjacent blocks and also whether the player can attach torches, redstone wire, etc to this block.
094     */
095    public boolean isOpaqueCube()
096    {
097        return false;
098    }
099
100    /**
101     * If this block doesn't render as an ordinary block it will return False (examples: signs, buttons, stairs, etc)
102     */
103    public boolean renderAsNormalBlock()
104    {
105        return false;
106    }
107
108    /**
109     * Checks to see if its valid to put this block at the specified coordinates. Args: world, x, y, z
110     */
111    public boolean canPlaceBlockAt(World par1World, int par2, int par3, int par4)
112    {
113        return false;
114    }
115
116    /**
117     * checks to see if you can place this block can be placed on that side of a block: BlockLever overrides
118     */
119    public boolean canPlaceBlockOnSide(World par1World, int par2, int par3, int par4, int par5)
120    {
121        return false;
122    }
123
124    /**
125     * Returns the quantity of items to drop on block destruction.
126     */
127    public int quantityDropped(Random par1Random)
128    {
129        return 0;
130    }
131
132    /**
133     * Adds all intersecting collision boxes to a list. (Be sure to only add boxes to the list if they intersect the
134     * mask.) Parameters: World, X, Y, Z, mask, list, colliding entity
135     */
136    public void addCollisionBoxesToList(World par1World, int par2, int par3, int par4, AxisAlignedBB par5AxisAlignedBB, List par6List, Entity par7Entity)
137    {
138        int l = par1World.getBlockMetadata(par2, par3, par4);
139
140        switch (getDirectionMeta(l))
141        {
142            case 0:
143                this.setBlockBounds(0.0F, 0.0F, 0.0F, 1.0F, 0.25F, 1.0F);
144                super.addCollisionBoxesToList(par1World, par2, par3, par4, par5AxisAlignedBB, par6List, par7Entity);
145                this.setBlockBounds(0.375F, 0.25F, 0.375F, 0.625F, 1.0F, 0.625F);
146                super.addCollisionBoxesToList(par1World, par2, par3, par4, par5AxisAlignedBB, par6List, par7Entity);
147                break;
148            case 1:
149                this.setBlockBounds(0.0F, 0.75F, 0.0F, 1.0F, 1.0F, 1.0F);
150                super.addCollisionBoxesToList(par1World, par2, par3, par4, par5AxisAlignedBB, par6List, par7Entity);
151                this.setBlockBounds(0.375F, 0.0F, 0.375F, 0.625F, 0.75F, 0.625F);
152                super.addCollisionBoxesToList(par1World, par2, par3, par4, par5AxisAlignedBB, par6List, par7Entity);
153                break;
154            case 2:
155                this.setBlockBounds(0.0F, 0.0F, 0.0F, 1.0F, 1.0F, 0.25F);
156                super.addCollisionBoxesToList(par1World, par2, par3, par4, par5AxisAlignedBB, par6List, par7Entity);
157                this.setBlockBounds(0.25F, 0.375F, 0.25F, 0.75F, 0.625F, 1.0F);
158                super.addCollisionBoxesToList(par1World, par2, par3, par4, par5AxisAlignedBB, par6List, par7Entity);
159                break;
160            case 3:
161                this.setBlockBounds(0.0F, 0.0F, 0.75F, 1.0F, 1.0F, 1.0F);
162                super.addCollisionBoxesToList(par1World, par2, par3, par4, par5AxisAlignedBB, par6List, par7Entity);
163                this.setBlockBounds(0.25F, 0.375F, 0.0F, 0.75F, 0.625F, 0.75F);
164                super.addCollisionBoxesToList(par1World, par2, par3, par4, par5AxisAlignedBB, par6List, par7Entity);
165                break;
166            case 4:
167                this.setBlockBounds(0.0F, 0.0F, 0.0F, 0.25F, 1.0F, 1.0F);
168                super.addCollisionBoxesToList(par1World, par2, par3, par4, par5AxisAlignedBB, par6List, par7Entity);
169                this.setBlockBounds(0.375F, 0.25F, 0.25F, 0.625F, 0.75F, 1.0F);
170                super.addCollisionBoxesToList(par1World, par2, par3, par4, par5AxisAlignedBB, par6List, par7Entity);
171                break;
172            case 5:
173                this.setBlockBounds(0.75F, 0.0F, 0.0F, 1.0F, 1.0F, 1.0F);
174                super.addCollisionBoxesToList(par1World, par2, par3, par4, par5AxisAlignedBB, par6List, par7Entity);
175                this.setBlockBounds(0.0F, 0.375F, 0.25F, 0.75F, 0.625F, 0.75F);
176                super.addCollisionBoxesToList(par1World, par2, par3, par4, par5AxisAlignedBB, par6List, par7Entity);
177        }
178
179        this.setBlockBounds(0.0F, 0.0F, 0.0F, 1.0F, 1.0F, 1.0F);
180    }
181
182    /**
183     * Updates the blocks bounds based on its current state. Args: world, x, y, z
184     */
185    public void setBlockBoundsBasedOnState(IBlockAccess par1IBlockAccess, int par2, int par3, int par4)
186    {
187        int l = par1IBlockAccess.getBlockMetadata(par2, par3, par4);
188
189        switch (getDirectionMeta(l))
190        {
191            case 0:
192                this.setBlockBounds(0.0F, 0.0F, 0.0F, 1.0F, 0.25F, 1.0F);
193                break;
194            case 1:
195                this.setBlockBounds(0.0F, 0.75F, 0.0F, 1.0F, 1.0F, 1.0F);
196                break;
197            case 2:
198                this.setBlockBounds(0.0F, 0.0F, 0.0F, 1.0F, 1.0F, 0.25F);
199                break;
200            case 3:
201                this.setBlockBounds(0.0F, 0.0F, 0.75F, 1.0F, 1.0F, 1.0F);
202                break;
203            case 4:
204                this.setBlockBounds(0.0F, 0.0F, 0.0F, 0.25F, 1.0F, 1.0F);
205                break;
206            case 5:
207                this.setBlockBounds(0.75F, 0.0F, 0.0F, 1.0F, 1.0F, 1.0F);
208        }
209    }
210
211    /**
212     * Lets the block know when one of its neighbor changes. Doesn't know which neighbor changed (coordinates passed are
213     * their own) Args: x, y, z, neighbor blockID
214     */
215    public void onNeighborBlockChange(World par1World, int par2, int par3, int par4, int par5)
216    {
217        int i1 = getDirectionMeta(par1World.getBlockMetadata(par2, par3, par4));
218        int j1 = par1World.getBlockId(par2 - Facing.offsetsXForSide[i1], par3 - Facing.offsetsYForSide[i1], par4 - Facing.offsetsZForSide[i1]);
219
220        if (j1 != Block.pistonBase.blockID && j1 != Block.pistonStickyBase.blockID)
221        {
222            par1World.setBlockToAir(par2, par3, par4);
223        }
224        else
225        {
226            Block.blocksList[j1].onNeighborBlockChange(par1World, par2 - Facing.offsetsXForSide[i1], par3 - Facing.offsetsYForSide[i1], par4 - Facing.offsetsZForSide[i1], par5);
227        }
228    }
229
230    public static int getDirectionMeta(int par0)
231    {
232        return par0 & 7;
233    }
234
235    @SideOnly(Side.CLIENT)
236
237    /**
238     * only called by clickMiddleMouseButton , and passed to inventory.setCurrentItem (along with isCreative)
239     */
240    public int idPicked(World par1World, int par2, int par3, int par4)
241    {
242        return 0;
243    }
244}