4040import static com .google .common .base .Preconditions .checkNotNull ;
4141
4242/**
43- * Stores block data as a multi-dimensional array of {@link BaseBlock}s and
43+ * Stores block data as an array of {@link BaseBlock}s and
4444 * other data as lists or maps.
4545 */
4646public class BlockArrayClipboard implements Clipboard {
4747
4848 private final Region region ;
4949 private BlockVector3 origin ;
50- private final BaseBlock [][][] blocks ;
51- private BiomeType [][][] biomes = null ;
50+ /**
51+ * Stride for y-index, for faster access to blocks/biomes array.
52+ */
53+ private final int yStride ;
54+ /**
55+ * Stride for z-index, for faster access to blocks/biomes array.
56+ */
57+ private final int zStride ;
58+ // Laid out in x-y-z order, as that's how we currently loop over positions.
59+ private final BaseBlock [] blocks ;
60+ // Laid out in x-y-z order, as that's how we currently loop over positions.
61+ private BiomeType [] biomes = null ;
5262 private final List <ClipboardEntity > entities = new ArrayList <>();
5363
5464 /**
@@ -64,7 +74,13 @@ public BlockArrayClipboard(Region region) {
6474 this .origin = region .getMinimumPoint ();
6575
6676 BlockVector3 dimensions = getDimensions ();
67- blocks = new BaseBlock [dimensions .x ()][dimensions .y ()][dimensions .z ()];
77+ blocks = new BaseBlock [dimensions .x () * dimensions .y () * dimensions .z ()];
78+ yStride = dimensions .x ();
79+ zStride = yStride * dimensions .y ();
80+ }
81+
82+ private int indexBlockVecBasedArray (BlockVector3 v ) {
83+ return v .x () + (v .y () * yStride ) + (v .z () * zStride );
6884 }
6985
7086 @ Override
@@ -125,7 +141,7 @@ public Entity createEntity(Location location, BaseEntity entity) {
125141 public BlockState getBlock (BlockVector3 position ) {
126142 if (region .contains (position )) {
127143 BlockVector3 v = position .subtract (region .getMinimumPoint ());
128- BaseBlock block = blocks [v . x ()][ v . y ()][ v . z ( )];
144+ BaseBlock block = blocks [indexBlockVecBasedArray ( v )];
129145 if (block != null ) {
130146 return block .toImmutableState ();
131147 }
@@ -138,7 +154,7 @@ public BlockState getBlock(BlockVector3 position) {
138154 public BaseBlock getFullBlock (BlockVector3 position ) {
139155 if (region .contains (position )) {
140156 BlockVector3 v = position .subtract (region .getMinimumPoint ());
141- BaseBlock block = blocks [v . x ()][ v . y ()][ v . z ( )];
157+ BaseBlock block = blocks [indexBlockVecBasedArray ( v )];
142158 if (block != null ) {
143159 return block ;
144160 }
@@ -151,7 +167,7 @@ public BaseBlock getFullBlock(BlockVector3 position) {
151167 public <B extends BlockStateHolder <B >> boolean setBlock (BlockVector3 position , B block ) {
152168 if (region .contains (position )) {
153169 BlockVector3 v = position .subtract (region .getMinimumPoint ());
154- blocks [v . x ()][ v . y ()][ v . z ( )] = block .toBaseBlock ();
170+ blocks [indexBlockVecBasedArray ( v )] = block .toBaseBlock ();
155171 return true ;
156172 } else {
157173 return false ;
@@ -168,7 +184,7 @@ public BiomeType getBiome(BlockVector3 position) {
168184 if (biomes != null
169185 && position .containedWithin (getMinimumPoint (), getMaximumPoint ())) {
170186 BlockVector3 v = position .subtract (region .getMinimumPoint ());
171- BiomeType biomeType = biomes [v . x ()][ v . y ()][ v . z ( )];
187+ BiomeType biomeType = biomes [indexBlockVecBasedArray ( v )];
172188 if (biomeType != null ) {
173189 return biomeType ;
174190 }
@@ -182,9 +198,10 @@ public boolean setBiome(BlockVector3 position, BiomeType biome) {
182198 if (position .containedWithin (getMinimumPoint (), getMaximumPoint ())) {
183199 BlockVector3 v = position .subtract (region .getMinimumPoint ());
184200 if (biomes == null ) {
185- biomes = new BiomeType [region .getWidth ()][region .getHeight ()][region .getLength ()];
201+ BlockVector3 dimensions = getDimensions ();
202+ biomes = new BiomeType [dimensions .x () * dimensions .y () * dimensions .z ()];
186203 }
187- biomes [v . x ()][ v . y ()][ v . z ( )] = biome ;
204+ biomes [indexBlockVecBasedArray ( v )] = biome ;
188205 return true ;
189206 }
190207 return false ;
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