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heightmap: use section height

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index is prune to errors and not very natural
This commit is contained in:
Moritz Zwerger 2025-03-25 20:19:22 +01:00
parent dc43b0c266
commit d2d45008b0
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GPG Key ID: 5CAD791931B09AC4
1 changed files with 4 additions and 10 deletions
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src/main/java/de/bixilon/minosoft/data/world/chunk/heightmap/ChunkHeightmap.kt
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@ -43,17 +43,11 @@ abstract class ChunkHeightmap(protected val chunk: Chunk) : Heightmap {
} }
private fun trace(position: InChunkPosition, notify: Boolean) { private fun trace(position: InChunkPosition, notify: Boolean) {
val sections = chunk.sections
var y = Int.MIN_VALUE var y = Int.MIN_VALUE
val index = position.xz val index = position.xz
sectionLoop@ for (sectionIndex in (position.y.sectionHeight - chunk.minSection) downTo 0) { sectionLoop@ for (sectionHeight in position.y.sectionHeight downTo chunk.minSection) {
if (sectionIndex >= sections.size) { val section = chunk[sectionHeight] ?: continue
// starting from above world
continue
}
val section = sections[sectionIndex] ?: continue
if (section.blocks.isEmpty) continue if (section.blocks.isEmpty) continue
val min = section.blocks.minPosition val min = section.blocks.minPosition
@ -63,11 +57,11 @@ abstract class ChunkHeightmap(protected val chunk: Chunk) : Heightmap {
for (sectionY in max.y downTo min.y) { for (sectionY in max.y downTo min.y) {
val state = section.blocks[InSectionPosition((sectionY shl 8) or index)] ?: continue val state = section.blocks[InSectionPosition(index).with(y = sectionY)] ?: continue
val pass = passes(state) val pass = passes(state)
if (pass == HeightmapPass.PASSES) continue if (pass == HeightmapPass.PASSES) continue
y = (sectionIndex + chunk.minSection) * ProtocolDefinition.SECTION_HEIGHT_Y + sectionY y = sectionHeight * ProtocolDefinition.SECTION_HEIGHT_Y + sectionY
if (pass == HeightmapPass.ABOVE) y++ if (pass == HeightmapPass.ABOVE) y++
break@sectionLoop break@sectionLoop