bluebey-studio: パン後に回転がぶるべー中心になるよう修正

1 files changed, 9 insertions, 2 deletions

diff --git a/public/bluebey-studio/src/main.js b/public/bluebey-studio/src/main.js
index 8d69154..b08ea11 100644
--- a/public/bluebey-studio/src/main.js
+++ b/public/bluebey-studio/src/main.js
@@ -2377,8 +2377,9 @@ async function init() {
       const dy = event.clientY - modelDrag.y;
       const k = dragScale();
       if (modelDrag.pan) {
-        // Plain drag: move the camera's reference point (the same effect as the
-        // two-finger drag on a phone). The character stays where it is.
+        // Plain drag: move the camera's reference point (the phone's two-finger
+        // drag). The character rides along with it, so it stays at the centre and
+        // orbiting still turns it in place instead of swinging it around.
         // Use the step since the previous event, not the total from the press:
         // pointermove fires many times per drag, so adding the total every time
         // would make the pan accelerate.
@@ -2391,9 +2392,15 @@ async function init() {
         const move = new THREE.Vector3()
           .addScaledVector(right, -stepX * k)
           .addScaledVector(up, stepY * k);
+        // Stay on the floor: a vertical drag pans forward/back, never lifts the
+        // character off the ground (which would detach its shadow).
+        move.y = 0;
         view.target.add(move);
         for (const controls of Object.values(view.controlsMap ?? {})) controls.target.add(move);
         for (const cam of Object.values(view.cameras ?? {})) cam.position.add(move);
+        const root = state.pose.root ?? (state.pose.root = [0, 0, 0]);
+        root[0] = round2((root[0] ?? 0) + move.x);
+        root[2] = round2((root[2] ?? 0) + move.z);
         view.captureInto(state.view);
       } else {
         // Shift+drag (or any touch drag on the character): slide the character,