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- Switch to Y X Z ordering
- In theory this will be more coherent since the first lut step on the
  GPU will have a more constrained range of values in the worst case
This commit is contained in:
Jozufozu 2024-11-10 12:10:47 -08:00
parent bedb92c73c
commit 671d47a136
2 changed files with 10 additions and 9 deletions
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9
common/src/backend/java/dev/engine_room/flywheel/backend/engine/LightLut.java
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@ -9,6 +9,7 @@ import it.unimi.dsi.fastutil.ints.IntArrayList;
import net.minecraft.core.SectionPos; import net.minecraft.core.SectionPos;
// Massive kudos to RogueLogix for figuring out this LUT scheme. // Massive kudos to RogueLogix for figuring out this LUT scheme.
// First layer is Y, then X, then Z.
public final class LightLut { public final class LightLut {
private final Layer<Layer<IntLayer>> indices = new Layer<>(); private final Layer<Layer<IntLayer>> indices = new Layer<>();
@ -17,8 +18,8 @@ public final class LightLut {
final var y = SectionPos.y(position); final var y = SectionPos.y(position);
final var z = SectionPos.z(position); final var z = SectionPos.z(position);
indices.computeIfAbsent(x, Layer::new) indices.computeIfAbsent(y, Layer::new)
.computeIfAbsent(y, IntLayer::new) .computeIfAbsent(x, IntLayer::new)
.set(z, index + 1); .set(z, index + 1);
} }
@ -27,13 +28,13 @@ public final class LightLut {
final var y = SectionPos.y(section); final var y = SectionPos.y(section);
final var z = SectionPos.z(section); final var z = SectionPos.z(section);
var first = indices.get(x); var first = indices.get(y);
if (first == null) { if (first == null) {
return; return;
} }
var second = first.get(y); var second = first.get(x);
if (second == null) { if (second == null) {
return; return;

10
common/src/backend/resources/assets/flywheel/flywheel/internal/light_lut.glsl
View file

@ -43,18 +43,18 @@ bool _flw_nextLut(uint base, int coord, out uint next) {
} }
bool _flw_chunkCoordToSectionIndex(ivec3 sectionPos, out uint index) { bool _flw_chunkCoordToSectionIndex(ivec3 sectionPos, out uint index) {
uint y; uint first;
if (_flw_nextLut(0, sectionPos.x, y) || y == 0) { if (_flw_nextLut(0, sectionPos.y, first) || first == 0) {
return true; return true;
} }
uint z; uint second;
if (_flw_nextLut(y, sectionPos.y, z) || z == 0) { if (_flw_nextLut(first, sectionPos.x, second) || second == 0) {
return true; return true;
} }
uint sectionIndex; uint sectionIndex;
if (_flw_nextLut(z, sectionPos.z, sectionIndex) || sectionIndex == 0) { if (_flw_nextLut(second, sectionPos.z, sectionIndex) || sectionIndex == 0) {
return true; return true;
} }