src/components/CharacterView.tsx

@@ -2,128 +2,30 @@ import { observer } from "mobx-react-lite";
 import type { Character } from "../types";
 import { SyncRigidBody } from "./SyncRigidBody";
 import { state } from "../state";
-import { useEffect, useRef } from "react";
-import { Euler, Quaternion, Vector3 } from "three";
-import { useFrame, useThree } from "@react-three/fiber";
-import { useKeyboardControls } from "@react-three/drei";
-import type { RapierRigidBody } from "@react-three/rapier";
 
-const SPEED = 5;
-const JUMP_SPEED = 8;
-const SENSITIVITY = 0.002;
-// Shoulder offset in character-local space: right, up, behind
-const SHOULDER_OFFSET = new Vector3(0.1, 1.5, 2.5);
-
-const _q = new Quaternion();
-const _e = new Euler(0, 0, 0, 'YXZ');
-const _offset = new Vector3();
-const _charPos = new Vector3();
-const _lookAt = new Vector3();
-
-type CharacterViewProps = {
-    character: Character;
-    editMode?: boolean;
-}
-
-export const CharacterView = observer(function ({ character, editMode }: CharacterViewProps) {
+export const CharacterView = observer(function ({ character }: { character: Character }) {
     const pos = character.transform.position;
-    const rbRef = useRef<RapierRigidBody>(null);
-    const [, get] = useKeyboardControls();
-    const { gl } = useThree();
-    const groundContacts = useRef(0);
-
-    const yawRef = useRef(0);
-    const pitchRef = useRef(0);
-    const mouseRef = useRef({ x: 0, y: 0 });
-    const jumpPressedRef = useRef(false);
-
-    useEffect(() => {
-        if (editMode)
-            return;
-
-        const canvas = gl.domElement;
-        const onClick = () => canvas.requestPointerLock();
-        const onMouseMove = (e: MouseEvent) => {
-            if (document.pointerLockElement !== canvas) return;
-            mouseRef.current.x += e.movementX;
-            mouseRef.current.y += e.movementY;
-        };
-        canvas.addEventListener('click', onClick);
-        document.addEventListener('mousemove', onMouseMove);
-        return () => {
-            canvas.removeEventListener('click', onClick);
-            document.removeEventListener('mousemove', onMouseMove);
-        };
-    }, [gl, editMode]);
-
-    useFrame(({ camera }) => {
-        if (editMode)
-            return;
-
-        if (!rbRef.current)
-            return;
-
-        yawRef.current -= mouseRef.current.x * SENSITIVITY;
-        pitchRef.current = Math.max(-0.4, Math.min(0.6, pitchRef.current - mouseRef.current.y * SENSITIVITY));
-        mouseRef.current.x = 0;
-        mouseRef.current.y = 0;
-
-        const yaw = yawRef.current;
-
-        // Rotate character body on Y axis only
-        _q.setFromEuler(_e.set(0, yaw, 0));
-        rbRef.current.setRotation({ x: _q.x, y: _q.y, z: _q.z, w: _q.w }, true);
-
-        // Pin camera to shoulder offset, rotated by yaw + pitch
-        const t = rbRef.current.translation();
-        _charPos.set(t.x, t.y, t.z);
-        _offset.copy(SHOULDER_OFFSET).applyEuler(_e.set(pitchRef.current, yaw, 0, 'YXZ'));
-        camera.position.copy(_charPos).add(_offset);
-        _lookAt.set(t.x, t.y + 1, t.z);
-        camera.lookAt(_lookAt);
-
-        // Movement relative to character facing direction
-        if (!state.game?.isPaused && !editMode) {
-            const { forward, backward, left, right, jump } = get();
-            const fwdX = -Math.sin(yaw);
-            const fwdZ = -Math.cos(yaw);
-            const fwdScale = (forward ? 1 : 0) - (backward ? 1 : 0);
-            const rightScale = (right ? 1 : 0) - (left ? 1 : 0);
-            // right vector = cross(fwd, up) = (-fwdZ, 0, fwdX)
-            const vx = (fwdX * fwdScale - fwdZ * rightScale) * SPEED;
-            const vz = (fwdZ * fwdScale + fwdX * rightScale) * SPEED;
-            const cur = rbRef.current.linvel();
-
-            const isGrounded = groundContacts.current > 0;
-
-            const vy = cur.y +
-                (jump && !jumpPressedRef.current && isGrounded
-                    ? JUMP_SPEED
-                    : 0);
-            jumpPressedRef.current = jump;
-
-            rbRef.current.setLinvel({ x: vx, y: vy, z: vz }, true);
-        }
-    });
 
     return (
         <SyncRigidBody
-            ref={rbRef}
-            colliders="cuboid"
-            lockRotations
-            position={[pos[0] + 0.5, pos[1] + 0.5, pos[2] + 0.5]}
-            onCollisionEnter={() => { groundContacts.current++; }}
-            onCollisionExit={() => { groundContacts.current--; }}
+            colliders="hull"
+            restitution={2}
             onSync={(data) => {
-                // state.game?.setCharacterTransform(
-                //     { position: data.position, look: character.transform.look },
-                //     data.linearVelocity,
-                //     undefined,
-                // );
+                state.game?.setCharacterTransform(
+                    {
+                        position: data.position,
+                        look: character.transform.look,
+                    },
+                    data.linearVelocity,
+                    undefined, // do not change radial velocity
+                );
             }}
         >
-            <group>
-                <mesh rotation={[-Math.PI / 2, -Math.PI / 4, 0]}>
+            <group
+                position={[pos[0] + 0.5, pos[1] + 0.5, pos[2] + 0.5]}
+                rotation={character.transform.look}
+            >
+                <mesh position={[0, 0, 0]} rotation={[-Math.PI / 2, -Math.PI / 4, 0]}>
                     <coneGeometry args={[0.55, 0.8, 4]} />
                     <meshStandardMaterial color="yellow" />
                 </mesh>

src/components/GameView.tsx

@@ -1,12 +1,53 @@
 import { observer } from "mobx-react-lite";
 import { SceneView } from "./SceneView";
 import { state } from "../state";
-import { useFrame } from "@react-three/fiber";
-import { Suspense } from "react";
+import { useFrame, useThree } from "@react-three/fiber";
+import { PointerLockControls, useKeyboardControls } from "@react-three/drei";
+import { Suspense, useEffect, useRef } from "react";
 import { Physics } from "@react-three/rapier";
 
+function PlayerMovement() {
+    const [, get] = useKeyboardControls();
+    const dirty = useRef(false);
+
+    useFrame(({ camera }, dt) => {
+        if (state.game?.isPaused)
+            return;
+
+        const { forward, backward, left, right } = get();
+        const speed = 5 * dt;
+        if (forward) { camera.translateZ(-speed); dirty.current = true; }
+        if (backward) { camera.translateZ(speed); dirty.current = true; }
+        if (left) { camera.translateX(-speed); dirty.current = true; }
+        if (right) { camera.translateX(speed); dirty.current = true; }
+
+        if (!dirty.current) return;
+        dirty.current = false;
+
+        const [rx, ry, rz] = camera.rotation.toArray();
+        state.game?.setCharacterTransform(
+            {
+                position: camera.position.toArray(),
+                look: [rx, ry, rz],
+            },
+            // do not change velocities
+        );
+    });
+
+    return <PointerLockControls onChange={() => { dirty.current = true; }} />;
+}
+
 export const GameView = observer(function () {
     const game = state.game;
+    const { camera } = useThree();
+
+    useEffect(() => {
+        if (!game)
+            return;
+        const { position, look } = game.camera;
+        camera.position.set(position[0], position[1], position[2]);
+        camera.rotation.set(look[0], look[1], look[2]);
+    }, []);
 
     useFrame((_, delta) => {
         state.game?.tick(delta);
@@ -17,7 +58,8 @@ export const GameView = observer(function () {
 
     return (<>
         <Suspense>
-            <Physics paused={game.isPaused} debug>
+            <PlayerMovement />
+            <Physics paused={game.isPaused}>
                 <SceneView scene={game.scene} />
             </Physics>
         </Suspense>

src/components/SceneView.tsx

@@ -34,6 +34,6 @@ export const SceneView = observer(function (props: SceneViewProps) {
             ))
         }
         {/* {props.editMode && <CharacterView character={props.scene.character} />} */}
-        {<CharacterView character={props.scene.character} editMode={props.editMode} />}
+        {<CharacterView character={props.scene.character} />}
     </>);
 });

src/components/SyncRigidBody.tsx

@@ -1,6 +1,6 @@
 import { RigidBody, type RigidBodyProps, type RapierRigidBody } from "@react-three/rapier";
 import { useFrame } from "@react-three/fiber";
-import { useImperativeHandle, useRef, type Ref } from "react";
+import { useRef } from "react";
 import { Euler, Quaternion } from "three";
 import type { R3, V3 } from "../types";
 
@@ -15,7 +15,6 @@ export type SyncRigidBodyOnSyncFunction = (data: SyncRigidBodyData) => void;
 
 type SyncRigidBodyProps = RigidBodyProps & {
     onSync: SyncRigidBodyOnSyncFunction;
-    ref?: Ref<RapierRigidBody | null>;
 };
 
 const _q = new Quaternion();
@@ -39,11 +38,8 @@ function compareTwoFloatArrays(a: Float64Array, b: Float64Array, epsilon: number
     return false;
 }
 
-export function SyncRigidBody({ onSync, ref, children, ...props }: SyncRigidBodyProps) {
+export function SyncRigidBody({ onSync, children, ...props }: SyncRigidBodyProps) {
     const rbRef = useRef<RapierRigidBody>(null);
-    
-    useImperativeHandle(ref, () => rbRef.current!);
-
     const prevData = useRef<Float64Array>(PREV_INIT.slice());
     const currentData = useRef<Float64Array>(PREV_INIT.slice());
 

src/components/ThreeView.tsx

@@ -35,7 +35,6 @@ export const ThreeView = observer(function () {
             { name: 'backward', keys: ['ArrowDown',  's', 'S'] },
             { name: 'left',     keys: ['ArrowLeft',  'a', 'A'] },
             { name: 'right',    keys: ['ArrowRight', 'd', 'D'] },
-            { name: 'jump', keys: ['Space'] },
         ]}>
         <div style={{ position: 'relative', width: '800px', height: '600px', border: '1px solid #333', borderRadius: '8px', overflow: 'hidden' }}>
             <Canvas