From 1ad52fd3c3dd86a22e0a80c068bf935177f51ec2 Mon Sep 17 00:00:00 2001
From: 134 <a134@134deMacBook-Pro.local>
Date: Sun, 21 Jun 2026 11:57:06 +0800
Subject: [PATCH] fix: reduce 3d world movement step

---
 components/canvas/model3d/Model3DViewer.tsx |  7 ++++++-
 components/canvas/world3d/World3DViewer.tsx | 12 ++++++++++--
 2 files changed, 16 insertions(+), 3 deletions(-)

diff --git a/components/canvas/model3d/Model3DViewer.tsx b/components/canvas/model3d/Model3DViewer.tsx
index c4acd13cf..73fb8960a 100644
--- a/components/canvas/model3d/Model3DViewer.tsx
+++ b/components/canvas/model3d/Model3DViewer.tsx
@@ -104,6 +104,8 @@ const CAMERA_PRESET_POSITIONS: Record<
 };
 
 const KTX2_TRANSCODER_PATH = "/three/basis/";
+const MODEL_MOVE_SPEED = 1.05;
+const MODEL_MAX_FRAME_MOVE_DISTANCE = 0.035;
 
 function CameraPresetController({
   controlsRef,
@@ -512,7 +514,10 @@ function ModelMovementControls({
     if (pressed.down) moveRef.current.addScaledVector(upRef.current, -1);
     if (moveRef.current.lengthSq() === 0) return;
 
-    const distance = 2.6 * delta;
+    const distance = Math.min(
+      MODEL_MOVE_SPEED * delta,
+      MODEL_MAX_FRAME_MOVE_DISTANCE
+    );
     moveRef.current.normalize().multiplyScalar(distance);
     camera.position.add(moveRef.current);
     if (orbitControlsRef.current?.target) {
diff --git a/components/canvas/world3d/World3DViewer.tsx b/components/canvas/world3d/World3DViewer.tsx
index 065623f30..d099421fc 100644
--- a/components/canvas/world3d/World3DViewer.tsx
+++ b/components/canvas/world3d/World3DViewer.tsx
@@ -205,6 +205,9 @@ const SPARK_MIN_SORT_INTERVAL_MS = 24;
 const SPARK_MINIMAL_FRAME_SORT_INTERVAL_MS = 40;
 const SPARK_SPLAT_FETCH_TIMEOUT_MS = 150_000;
 const SPARK_SPLAT_LOAD_TIMEOUT_MS = 45_000;
+const WORLD_FIRST_PERSON_MOVE_SPEED = 1.35;
+const WORLD_ORBIT_MOVE_SPEED = 1.05;
+const WORLD_MAX_FRAME_MOVE_DISTANCE = 0.04;
 
 const KEY_TO_MOVEMENT: Partial<Record<string, MovementCommand>> = {
   KeyW: "forward",
@@ -1147,8 +1150,13 @@ function CameraMovementControls({
       Boolean(padPressed && Object.values(padPressed).some(Boolean));
     if (!hasMovement) return;
 
-    const moveSpeed = firstPerson ? 3.8 : 2.8;
-    const distance = moveSpeed * delta;
+    const moveSpeed = firstPerson
+      ? WORLD_FIRST_PERSON_MOVE_SPEED
+      : WORLD_ORBIT_MOVE_SPEED;
+    const distance = Math.min(
+      moveSpeed * delta,
+      WORLD_MAX_FRAME_MOVE_DISTANCE
+    );
 
     camera.getWorldDirection(directionRef.current);
     directionRef.current.setY(0).normalize();