make steam venting decrement snow layers

src/main/java/gregtech/api/capability/impl/RecipeLogicSteam.java

@@ -130,7 +130,7 @@ public void tryDoVenting() {
         IBlockState blockOnPos = metaTileEntity.getWorld().getBlockState(ventingBlockPos);
         if (blockOnPos.getCollisionBoundingBox(metaTileEntity.getWorld(), ventingBlockPos) == Block.NULL_AABB) {
             performVentingAnimation(ventingBlockPos, machinePos);
-        } else if (GTUtility.tryBreakSnowLayer(metaTileEntity.getWorld(), ventingBlockPos, blockOnPos, false)) {
+        } else if (GTUtility.tryBreakSnow(metaTileEntity.getWorld(), ventingBlockPos, blockOnPos, false)) {
             performVentingAnimation(ventingBlockPos, machinePos);
         } else if (!ventingStuck) {
             setVentingStuck(true);

src/main/java/gregtech/api/util/GTUtility.java

@@ -705,24 +705,40 @@ public static MapColor getMapColor(int rgb) {
         return color;
     }
 
-    public static boolean isBlockSnowLayer(@Nonnull IBlockState blockState) {
-        return blockState.getBlock() == Blocks.SNOW_LAYER && blockState.getValue(BlockSnow.LAYERS) == 1;
+    /**
+     * @param blockState the blockstate to check
+     * @return if the block is a snow layer or snow block
+     */
+    public static boolean isBlockSnow(@Nonnull IBlockState blockState) {
+        return blockState.getBlock() == Blocks.SNOW_LAYER || blockState.getBlock() == Blocks.SNOW;
     }
 
     /**
      * Attempt to break a (single) snow layer at the given BlockPos.
+     * Will also turn snow blocks into snow layers at height 7.
      *
-     * @return true if the passed IBlockState was a snow layer
+     * @return true if the passed IBlockState was valid snow block
      */
-    public static boolean tryBreakSnowLayer(World world, BlockPos pos, @Nonnull IBlockState blockState, boolean playSound) {
-        if (isBlockSnowLayer(blockState)) {
-            world.destroyBlock(pos, false);
-            if (playSound) {
-                world.playSound(null, pos.getX(), pos.getY(), pos.getZ(), SoundEvents.BLOCK_LAVA_EXTINGUISH, SoundCategory.BLOCKS, 1.0f, 1.0f);
+    public static boolean tryBreakSnow(@Nonnull World world, @Nonnull BlockPos pos, @Nonnull IBlockState state, boolean playSound) {
+        boolean success = false;
+        if (state.getBlock() == Blocks.SNOW) {
+            world.setBlockState(pos, Blocks.SNOW_LAYER.getDefaultState().withProperty(BlockSnow.LAYERS, 7));
+            success = true;
+        } else if (state.getBlock() == Blocks.SNOW_LAYER) {
+            int layers = state.getValue(BlockSnow.LAYERS);
+            if (layers == 1) {
+                world.destroyBlock(pos, false);
+            } else {
+                world.setBlockState(pos, Blocks.SNOW_LAYER.getDefaultState().withProperty(BlockSnow.LAYERS, layers - 1));
             }
-            return true;
+            success = true;
         }
-        return false;
+
+        if (success && playSound) {
+            world.playSound(null, pos.getX(), pos.getY(), pos.getZ(), SoundEvents.BLOCK_LAVA_EXTINGUISH, SoundCategory.BLOCKS, 1.0f, 1.0f);
+        }
+
+        return success;
     }
 
     /**

src/main/java/gregtech/common/metatileentities/multi/MetaTileEntityPrimitiveBlastFurnace.java

@@ -45,7 +45,7 @@
 
 public class MetaTileEntityPrimitiveBlastFurnace extends RecipeMapPrimitiveMultiblockController {
 
-    private static final TraceabilityPredicate IS_SNOW_LAYER = new TraceabilityPredicate(bws -> GTUtility.isBlockSnowLayer(bws.getBlockState()));
+    private static final TraceabilityPredicate SNOW_PREDICATE = new TraceabilityPredicate(bws -> GTUtility.isBlockSnow(bws.getBlockState()));
 
     public MetaTileEntityPrimitiveBlastFurnace(ResourceLocation metaTileEntityId) {
         super(metaTileEntityId, RecipeMaps.PRIMITIVE_BLAST_FURNACE_RECIPES);
@@ -64,7 +64,7 @@ protected BlockPattern createStructurePattern() {
                 .aisle("XXX", "XYX", "XXX", "XXX")
                 .where('X', states(MetaBlocks.METAL_CASING.getState(BlockMetalCasing.MetalCasingType.PRIMITIVE_BRICKS)))
                 .where('#', air())
-                .where('&', air().or(IS_SNOW_LAYER)) // this won't stay in the structure, and will be broken while running
+                .where('&', air().or(SNOW_PREDICATE)) // this won't stay in the structure, and will be broken while running
                 .where('Y', selfPredicate())
                 .build();
     }
@@ -155,7 +155,7 @@ private void damageEntitiesAndBreakSnow() {
 
         if (getOffsetTimer() % 10 == 0) {
             IBlockState state = getWorld().getBlockState(middlePos);
-            GTUtility.tryBreakSnowLayer(getWorld(), middlePos, state, true);
+            GTUtility.tryBreakSnow(getWorld(), middlePos, state, true);
         }
     }
 

src/main/java/gregtech/common/metatileentities/multi/multiblockpart/MetaTileEntityMufflerHatch.java

@@ -100,12 +100,12 @@ private boolean checkFrontFaceFree() {
 
         // break a snow layer if it exists, and if this machine is running
         if (controller != null && controller.isActive()) {
-            if (GTUtility.tryBreakSnowLayer(getWorld(), frontPos, blockState, true)) {
+            if (GTUtility.tryBreakSnow(getWorld(), frontPos, blockState, true)) {
                 return true;
             }
             return blockState.getBlock().isAir(blockState, getWorld(), frontPos);
         }
-        return blockState.getBlock().isAir(blockState, getWorld(), frontPos) || GTUtility.isBlockSnowLayer(blockState);
+        return blockState.getBlock().isAir(blockState, getWorld(), frontPos) || GTUtility.isBlockSnow(blockState);
     }
 
     @SideOnly(Side.CLIENT)