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world: work around Minecraft lighting nonsense

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Minecraft occasionally generates chunks which are not yet lit.
In the past, I'd have said to just make them not render, but these
can sometimes be large areas of the world.

Instead, render them with full bright SkyLight. This looks less bad
than whatever is stored in the SkyLight property in these cases.

Closes #1787, probably. Only one person bothered providing a sample file.
This commit is contained in:
Nicolas F
2020-06-25 18:55:48 +02:00
parent 0143ad63a6
commit d3a5786642
1 changed files with 16 additions and 10 deletions
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26
overviewer_core/world.py
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@@ -1428,16 +1428,22 @@ class RegionSet(object):
# Turn the skylight array into a 16x16x16 matrix. The array comes
# packed 2 elements per byte, so we need to expand it.
try:
if 'SkyLight' in section:
skylight = numpy.frombuffer(section['SkyLight'], dtype=numpy.uint8)
skylight = skylight.reshape((16,16,8))
else: # Special case introduced with 1.14
skylight = numpy.zeros((16,16,8), dtype=numpy.uint8)
skylight_expanded = numpy.empty((16,16,16), dtype=numpy.uint8)
skylight_expanded[:,:,::2] = skylight & 0x0F
skylight_expanded[:,:,1::2] = (skylight & 0xF0) >> 4
del skylight
section['SkyLight'] = skylight_expanded
# Sometimes, Minecraft loves generating chunks with no light info.
# These mostly appear to have those two properties, and in this case
# we default to full-bright as it's less jarring to look at than all-black.
if chunk_data.get("Status", "") == "spawn" and 'Lights' in chunk_data:
section['SkyLight'] = numpy.full((16,16,16), 255, dtype=numpy.uint8)
else:
if 'SkyLight' in section:
skylight = numpy.frombuffer(section['SkyLight'], dtype=numpy.uint8)
skylight = skylight.reshape((16,16,8))
else: # Special case introduced with 1.14
skylight = numpy.zeros((16,16,8), dtype=numpy.uint8)
skylight_expanded = numpy.empty((16,16,16), dtype=numpy.uint8)
skylight_expanded[:,:,::2] = skylight & 0x0F
skylight_expanded[:,:,1::2] = (skylight & 0xF0) >> 4
del skylight
section['SkyLight'] = skylight_expanded
# Turn the BlockLight array into a 16x16x16 matrix, same as SkyLight
if 'BlockLight' in section: