top()

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Syntax

top(type, pos)

Returns the Y value of the topmost block at given x, z coords (y value of a block is not important), according to the heightmap specified by type. Valid options are:

  • light: topmost light blocking block (1.13 only)
  • motion: topmost motion blocking block
  • terrain: topmost motion blocking block except leaves
  • ocean_floor: topmost non-water block
  • surface: topmost surface block
top('motion', x, y, z)  => 63
top('ocean_floor', x, y, z)  => 41

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