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section occlusion: don't trace inner regions

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They are not needed and thrown away anyways. This makes performance better, because when the section is full, we only need to start 1536 blocks tracing and not all 4096
This commit is contained in:
Moritz Zwerger 2025-03-09 15:23:08 +01:00
parent 8b5e27a47f
commit 58a36aa454
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GPG Key ID: 5CAD791931B09AC4
2 changed files with 15 additions and 6 deletions
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16
src/main/java/de/bixilon/minosoft/data/world/container/block/SectionOcclusion.kt
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@ -77,6 +77,7 @@ class SectionOcclusion(
return false
}
private fun trace(regions: ShortArray, position: InSectionPosition) = trace(regions, position, position.index.toShort())
private fun trace(regions: ShortArray, position: InSectionPosition, region: Short) {
if (regions.setIfUnset(position, region)) return
@ -92,11 +93,18 @@ class SectionOcclusion(
// mark regions and check direct neighbours
Arrays.fill(array, EMPTY_REGION)
// TODO: Only start flood filling from sides (don't trace potential irrelevant regions in the middle)
// TODO: Keep track of direction and never go into negative again (we can't change the direction of the look; it can not refelct here)
// TODO: Keep track of direction and never go into negative again (we can't change the direction of the look; it can not reflect here)
for (index in 0 until ProtocolDefinition.BLOCKS_PER_SECTION) {
trace(array, InSectionPosition(index), index.toShort())
for (index in 0 until 256) {
trace(array, InSectionPosition((index shr 0) and 0x0F, 0x00, (index shr 4) and 0x0F))
trace(array, InSectionPosition((index shr 0) and 0x0F, 0x0F, (index shr 4) and 0x0F))
trace(array, InSectionPosition((index shr 0) and 0x0F, (index shr 4) and 0x0F, 0x00))
trace(array, InSectionPosition((index shr 0) and 0x0F, (index shr 4) and 0x0F, 0x0F))
trace(array, InSectionPosition(0x00, (index shr 4) and 0x0F, (index shr 0) and 0x0F))
trace(array, InSectionPosition(0x0F, (index shr 4) and 0x0F, (index shr 0) and 0x0F))
}
return array

5
src/main/java/de/bixilon/minosoft/data/world/vec/SVec3.kt
View File

@ -30,8 +30,6 @@ value class SVec3(val raw: Int) {
assertVec(z, -MAX_Z, MAX_Z)
}
constructor(vector: DirectionVector) : this(vector.x, vector.y, vector.z)
inline val x: Int get() = (((raw ushr SHIFT_X) and MASK_X) shl (Int.SIZE_BITS - BITS_X)) shr (Int.SIZE_BITS - BITS_X)
inline val y: Int get() = (((raw ushr SHIFT_Y) and MASK_Y) shl (Int.SIZE_BITS - BITS_Y)) shr (Int.SIZE_BITS - BITS_Y)
@ -131,5 +129,8 @@ value class SVec3(val raw: Int) {
val EMPTY = SVec3(0, 0, 0)
operator fun invoke(vector: DirectionVector) = SVec3(vector.x, vector.y, vector.z)
}
}