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Fix javaY precision #6435

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Merged
onebeastchris merged 4 commits into from
Jun 1, 2026
+5 −2
Merged

Fix javaY precision #6435

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31e54c4
Fix javaY precision
SamB440 May 30, 2026
f853a2c
Fix player offset
SamB440 May 30, 2026
6072be7
Clarify player offset
SamB440 May 30, 2026
456865d
Implement requested changes
SamB440 Jun 1, 2026
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3 changes: 2 additions & 1 deletion core/src/main/java/org/geysermc/geyser/entity/EntityDefinitions.java
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Original file line number Diff line number Diff line change
Expand Up @@ -692,7 +692,8 @@ public final class EntityDefinitions {

EntityDefinition<AvatarEntity> avatarEntityBase = EntityDefinition.<AvatarEntity>inherited(null, livingEntityBase)
.height(1.8f).width(0.6f)
.offset(1.62f)
// This is the offset sent by Bedrock in its player position. Verified on Bedrock 26.23.
.offset(1.62001f)
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@Camotoy Camotoy May 30, 2026

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Let's mark why we're doing this? E.G. "Player offset sent by Bedrock. Verified on Bedrock 26.23".

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@SamB440 SamB440 May 30, 2026

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Done.

.addTranslator(null) // Player main hand
.addTranslator(MetadataTypes.BYTE, AvatarEntity::setSkinVisibility)
.build();
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4 changes: 3 additions & 1 deletion core/src/main/java/org/geysermc/geyser/level/physics/CollisionManager.java
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Expand Up @@ -61,6 +61,7 @@ public class CollisionManager {
public static final BlockCollision FLUID_COLLISION = new OtherCollision(new BoundingBox[]{new BoundingBox(0.5, 0.25, 0.5, 1, 0.5, 1)});
// If you read this, feel free to suggest a more proper way to detect the Bedrock player's own onGround status instead of using a margin
private static final double POSITION_ADJUSTMENT_MARGIN = 0.05;
private static final double PLAYER_OFFSET = Double.parseDouble(Float.toString(EntityDefinitions.PLAYER.offset()));

private final GeyserSession session;

Expand Down Expand Up @@ -174,9 +175,10 @@ public BoundingBox getActiveBoundingBox() {
if (pistonCache.isPlayerAttachedToHoney()) {
return null;
}

// We need to parse the float as a string since casting a float to a double causes us to
// lose precision and thus, causes players to get stuck when walking near walls
double javaY = Double.parseDouble(Float.toString(bedrockPosition.getY())) - EntityDefinitions.PLAYER.offset();
double javaY = Double.parseDouble(Float.toString(bedrockPosition.getY())) - PLAYER_OFFSET;

Vector3d position = Vector3d.from(Double.parseDouble(Float.toString(bedrockPosition.getX())), javaY, Double.parseDouble(Float.toString(bedrockPosition.getZ())));

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