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  1. Minecraft: Java Edition
  2. MC-74703

Redstone Ore does not produce particles on bottom side if not at y=0

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    • Icon: Bug Bug
    • Resolution: Fixed
    • Minecraft 17w47b
    • Minecraft 1.8.1, Minecraft 1.8.7, Minecraft 1.8.8, Minecraft 1.12.2, Minecraft 17w47a
    • Windows 8
      Particles: "All"
      Fast Graphics
      Render Distance 4
    • Confirmed

      The bug

      When activated (by clicking or walking on top of it), redstone ore not placed at y=0 produces particles on all sides except for its underside. If placed at y=0, particles will appear on the underside of the block as expected.

      Code analysis

      Code analysis by Pokechu22 can be found in this Reddit comment.

      Here's the code in BlockRedstoneOre:

      private void spawnParticles(World worldIn, BlockPos pos) {
          Random random = worldIn.rand;
          double d0 = 0.0625D;
      
          for (int i = 0; i < 6; ++i) {
              double d1 = (double)((float)pos.getX() + random.nextFloat());
              double d2 = (double)((float)pos.getY() + random.nextFloat());
              double d3 = (double)((float)pos.getZ() + random.nextFloat());
      
              if (i == 0 && !worldIn.getBlockState(pos.up()).isOpaqueCube()) {
                  d2 = (double)pos.getY() + 0.0625D + 1.0D;
              }
      
              if (i == 1 && !worldIn.getBlockState(pos.down()).isOpaqueCube()) {
                  d2 = (double)pos.getY() - 0.0625D;
              }
      
              if (i == 2 && !worldIn.getBlockState(pos.south()).isOpaqueCube()) {
                  d3 = (double)pos.getZ() + 0.0625D + 1.0D;
              }
      
              if (i == 3 && !worldIn.getBlockState(pos.north()).isOpaqueCube()) {
                  d3 = (double)pos.getZ() - 0.0625D;
              }
      
              if (i == 4 && !worldIn.getBlockState(pos.east()).isOpaqueCube()) {
                  d1 = (double)pos.getX() + 0.0625D + 1.0D;
              }
      
              if (i == 5 && !worldIn.getBlockState(pos.west()).isOpaqueCube()) {
                  d1 = (double)pos.getX() - 0.0625D;
              }
      
              if (d1 < (double)pos.getX() || d1 > (double)(pos.getX() + 1) || d2 < 0.0D || d2 > (double)(pos.getY() + 1) || d3 < (double)pos.getZ() || d3 > (double)(pos.getZ() + 1)) {
                  worldIn.spawnParticle(EnumParticleTypes.REDSTONE, d1, d2, d3, 0.0D, 0.0D, 0.0D);
              }
          }
      }
      

      It checks 6 sides, including down, and then checks to make sure it's not rendering inside of the block. But for checking on y, it does d2 < 0.0D || d2 > (double)(pos.getY() + 1) instead of d2 < (double)pos.getY() || d2 > (double)(pos.getY() + 1) — that looks like a mistake to me.

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            Unassigned Unassigned
            Sonicwave [Mod] Sonicwave
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              Created:
              Updated:
              Resolved:
              CHK: