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package net.minecraft.client.renderer;
import javax.annotation.Nullable;
import net.minecraft.client.renderer.chunk.SectionRenderDispatcher;
import net.minecraft.client.renderer.culling.Frustum;
import net.minecraft.core.BlockPos;
import net.minecraft.core.SectionPos;
import net.minecraft.util.Mth;
import net.minecraft.world.level.levelgen.structure.BoundingBox;
import net.minecraft.world.phys.AABB;
import net.minecraftforge.api.distmarker.Dist;
import net.minecraftforge.api.distmarker.OnlyIn;
@OnlyIn(Dist.CLIENT)
public class Octree {
private final Octree.Branch root;
final BlockPos cameraSectionCenter;
public Octree(SectionPos p_370029_, int p_366086_, int p_369498_, int p_361013_) {
int i = p_366086_ * 2 + 1;
int j = Mth.smallestEncompassingPowerOfTwo(i);
int k = p_366086_ * 16;
BlockPos blockpos = p_370029_.origin();
this.cameraSectionCenter = p_370029_.center();
int l = blockpos.getX() - k;
int i1 = l + j * 16 - 1;
int j1 = j >= p_369498_ ? p_361013_ : blockpos.getY() - k;
int k1 = j1 + j * 16 - 1;
int l1 = blockpos.getZ() - k;
int i2 = l1 + j * 16 - 1;
this.root = new Octree.Branch(new BoundingBox(l, j1, l1, i1, k1, i2));
}
public boolean add(SectionRenderDispatcher.RenderSection p_369314_) {
return this.root.add(p_369314_);
}
public void visitNodes(Octree.OctreeVisitor p_364694_, Frustum p_368650_, int p_366939_) {
this.root.visitNodes(p_364694_, false, p_368650_, 0, p_366939_, true);
}
boolean isClose(double p_361646_, double p_363586_, double p_364484_, double p_366426_, double p_367659_, double p_363335_, int p_370074_) {
int i = this.cameraSectionCenter.getX();
int j = this.cameraSectionCenter.getY();
int k = this.cameraSectionCenter.getZ();
return (double)i > p_361646_ - (double)p_370074_
&& (double)i < p_366426_ + (double)p_370074_
&& (double)j > p_363586_ - (double)p_370074_
&& (double)j < p_367659_ + (double)p_370074_
&& (double)k > p_364484_ - (double)p_370074_
&& (double)k < p_363335_ + (double)p_370074_;
}
@OnlyIn(Dist.CLIENT)
static enum AxisSorting {
XYZ(4, 2, 1),
XZY(4, 1, 2),
YXZ(2, 4, 1),
YZX(1, 4, 2),
ZXY(2, 1, 4),
ZYX(1, 2, 4);
final int xShift;
final int yShift;
final int zShift;
private AxisSorting(final int p_369508_, final int p_365211_, final int p_368387_) {
this.xShift = p_369508_;
this.yShift = p_365211_;
this.zShift = p_368387_;
}
public static Octree.AxisSorting getAxisSorting(int p_362893_, int p_361700_, int p_362465_) {
if (p_362893_ > p_361700_ && p_362893_ > p_362465_) {
return p_361700_ > p_362465_ ? XYZ : XZY;
} else if (p_361700_ > p_362893_ && p_361700_ > p_362465_) {
return p_362893_ > p_362465_ ? YXZ : YZX;
} else {
return p_362893_ > p_361700_ ? ZXY : ZYX;
}
}
}
@OnlyIn(Dist.CLIENT)
class Branch implements Octree.Node {
private final Octree.Node[] nodes = new Octree.Node[8];
private final BoundingBox boundingBox;
private final int bbCenterX;
private final int bbCenterY;
private final int bbCenterZ;
private final Octree.AxisSorting sorting;
private final boolean cameraXDiffNegative;
private final boolean cameraYDiffNegative;
private final boolean cameraZDiffNegative;
public Branch(final BoundingBox p_369054_) {
this.boundingBox = p_369054_;
this.bbCenterX = this.boundingBox.minX() + this.boundingBox.getXSpan() / 2;
this.bbCenterY = this.boundingBox.minY() + this.boundingBox.getYSpan() / 2;
this.bbCenterZ = this.boundingBox.minZ() + this.boundingBox.getZSpan() / 2;
int i = Octree.this.cameraSectionCenter.getX() - this.bbCenterX;
int j = Octree.this.cameraSectionCenter.getY() - this.bbCenterY;
int k = Octree.this.cameraSectionCenter.getZ() - this.bbCenterZ;
this.sorting = Octree.AxisSorting.getAxisSorting(Math.abs(i), Math.abs(j), Math.abs(k));
this.cameraXDiffNegative = i < 0;
this.cameraYDiffNegative = j < 0;
this.cameraZDiffNegative = k < 0;
}
public boolean add(SectionRenderDispatcher.RenderSection p_366103_) {
boolean flag = p_366103_.getOrigin().getX() - this.bbCenterX < 0;
boolean flag1 = p_366103_.getOrigin().getY() - this.bbCenterY < 0;
boolean flag2 = p_366103_.getOrigin().getZ() - this.bbCenterZ < 0;
boolean flag3 = flag != this.cameraXDiffNegative;
boolean flag4 = flag1 != this.cameraYDiffNegative;
boolean flag5 = flag2 != this.cameraZDiffNegative;
int i = getNodeIndex(this.sorting, flag3, flag4, flag5);
if (this.areChildrenLeaves()) {
boolean flag6 = this.nodes[i] != null;
this.nodes[i] = Octree.this.new Leaf(p_366103_);
return !flag6;
} else if (this.nodes[i] != null) {
Octree.Branch octree$branch1 = (Octree.Branch)this.nodes[i];
return octree$branch1.add(p_366103_);
} else {
BoundingBox boundingbox = this.createChildBoundingBox(flag, flag1, flag2);
Octree.Branch octree$branch = Octree.this.new Branch(boundingbox);
this.nodes[i] = octree$branch;
return octree$branch.add(p_366103_);
}
}
private static int getNodeIndex(Octree.AxisSorting p_362519_, boolean p_363738_, boolean p_363441_, boolean p_360792_) {
int i = 0;
if (p_363738_) {
i += p_362519_.xShift;
}
if (p_363441_) {
i += p_362519_.yShift;
}
if (p_360792_) {
i += p_362519_.zShift;
}
return i;
}
private boolean areChildrenLeaves() {
return this.boundingBox.getXSpan() == 32;
}
private BoundingBox createChildBoundingBox(boolean p_364452_, boolean p_368731_, boolean p_366789_) {
int i;
int j;
if (p_364452_) {
i = this.boundingBox.minX();
j = this.bbCenterX - 1;
} else {
i = this.bbCenterX;
j = this.boundingBox.maxX();
}
int k;
int l;
if (p_368731_) {
k = this.boundingBox.minY();
l = this.bbCenterY - 1;
} else {
k = this.bbCenterY;
l = this.boundingBox.maxY();
}
int i1;
int j1;
if (p_366789_) {
i1 = this.boundingBox.minZ();
j1 = this.bbCenterZ - 1;
} else {
i1 = this.bbCenterZ;
j1 = this.boundingBox.maxZ();
}
return new BoundingBox(i, k, i1, j, l, j1);
}
@Override
public void visitNodes(Octree.OctreeVisitor p_369870_, boolean p_363049_, Frustum p_363949_, int p_363158_, int p_368250_, boolean p_369443_) {
boolean flag = p_363049_;
if (!p_363049_) {
int i = p_363949_.cubeInFrustum(this.boundingBox);
p_363049_ = i == -2;
flag = i == -2 || i == -1;
}
if (flag) {
p_369443_ = p_369443_
&& Octree.this.isClose(
(double)this.boundingBox.minX(),
(double)this.boundingBox.minY(),
(double)this.boundingBox.minZ(),
(double)this.boundingBox.maxX(),
(double)this.boundingBox.maxY(),
(double)this.boundingBox.maxZ(),
p_368250_
);
p_369870_.visit(this, p_363049_, p_363158_, p_369443_);
for (Octree.Node octree$node : this.nodes) {
if (octree$node != null) {
octree$node.visitNodes(p_369870_, p_363049_, p_363949_, p_363158_ + 1, p_368250_, p_369443_);
}
}
}
}
@Nullable
@Override
public SectionRenderDispatcher.RenderSection getSection() {
return null;
}
@Override
public AABB getAABB() {
return new AABB(
(double)this.boundingBox.minX(),
(double)this.boundingBox.minY(),
(double)this.boundingBox.minZ(),
(double)(this.boundingBox.maxX() + 1),
(double)(this.boundingBox.maxY() + 1),
(double)(this.boundingBox.maxZ() + 1)
);
}
}
@OnlyIn(Dist.CLIENT)
final class Leaf implements Octree.Node {
private final SectionRenderDispatcher.RenderSection section;
Leaf(final SectionRenderDispatcher.RenderSection p_368561_) {
this.section = p_368561_;
}
@Override
public void visitNodes(Octree.OctreeVisitor p_366276_, boolean p_365424_, Frustum p_366156_, int p_361139_, int p_366518_, boolean p_368604_) {
AABB aabb = this.section.getBoundingBox();
if (p_365424_ || p_366156_.isVisible(this.getSection().getBoundingBox())) {
p_368604_ = p_368604_
&& Octree.this.isClose(aabb.minX, aabb.minY, aabb.minZ, aabb.maxX, aabb.maxY, aabb.maxZ, p_366518_);
p_366276_.visit(this, p_365424_, p_361139_, p_368604_);
}
}
@Override
public SectionRenderDispatcher.RenderSection getSection() {
return this.section;
}
@Override
public AABB getAABB() {
return this.section.getBoundingBox();
}
}
@OnlyIn(Dist.CLIENT)
public interface Node {
void visitNodes(Octree.OctreeVisitor p_362009_, boolean p_361730_, Frustum p_366227_, int p_362990_, int p_361345_, boolean p_361185_);
@Nullable
SectionRenderDispatcher.RenderSection getSection();
AABB getAABB();
}
@FunctionalInterface
@OnlyIn(Dist.CLIENT)
public interface OctreeVisitor {
void visit(Octree.Node p_368363_, boolean p_369407_, int p_360941_, boolean p_364507_);
}
} |