updated the collision for jumps and terrain

src/scene/PlayerRig.tsx

@@ -41,12 +41,12 @@ import {
 import {
   PLAYER_GROUND_PROBE_DISTANCE,
   PLAYER_JUMP_VELOCITY,
-  PLAYER_LANDING_PRESENTATION_MS,
   bufferPlayerJump,
   cancelBufferedPlayerJump,
-  characterVerticalMotion,
+  createCharacterVerticalPresentationTiming,
   createPlayerJumpTiming,
   isWalkableGroundHit,
+  updateCharacterVerticalPresentation,
   updatePlayerJumpTiming,
   type CharacterVerticalMotion,
 } from "../game/playerJump";
@@ -123,16 +123,14 @@ function PlayerController({
     [rapier],
   );
   const jumpTimingRef = useRef(createPlayerJumpTiming());
-  const wasGroundedRef = useRef(true);
-  const landingUntilRef = useRef(Number.NEGATIVE_INFINITY);
+  const verticalPresentationTimingRef = useRef(createCharacterVerticalPresentationTiming());
 
   useEffect(() => {
     if (bodyRef.current) placeAtActiveSpawn(bodyRef.current, orbitRef.current);
     lastReported.current = [...spawn.footPosition];
     clearJumpRequest();
     jumpTimingRef.current = createPlayerJumpTiming(performance.now());
-    wasGroundedRef.current = true;
-    landingUntilRef.current = Number.NEGATIVE_INFINITY;
+    verticalPresentationTimingRef.current = createCharacterVerticalPresentationTiming();
     verticalMotionRef.current = "grounded";
   }, [bodyRef, orbitRef, resetRevision, spawn, verticalMotionRef]);
 
@@ -189,11 +187,12 @@ function PlayerController({
     if (gameplayBlocked) {
       cancelBufferedPlayerJump(jumpTimingRef.current);
       movingRef.current = false;
-      verticalMotionRef.current = characterVerticalMotion(
+      verticalMotionRef.current = updateCharacterVerticalPresentation(
+        verticalPresentationTimingRef.current,
         grounded,
         velocity.y,
         nowMs,
-        landingUntilRef.current,
+        false,
       );
       body.setLinvel({ x: 0, y: velocity.y, z: 0 }, true);
       return;
@@ -208,15 +207,12 @@ function PlayerController({
     );
     const verticalVelocity = shouldJump ? PLAYER_JUMP_VELOCITY : velocity.y;
     if (shouldJump) grounded = false;
-    if (grounded && !wasGroundedRef.current) {
-      landingUntilRef.current = nowMs + PLAYER_LANDING_PRESENTATION_MS;
-    }
-    wasGroundedRef.current = grounded;
-    verticalMotionRef.current = characterVerticalMotion(
+    verticalMotionRef.current = updateCharacterVerticalPresentation(
+      verticalPresentationTimingRef.current,
       grounded,
       verticalVelocity,
       nowMs,
-      landingUntilRef.current,
+      shouldJump,
     );
 
     const [worldX, worldZ] = cameraRelativeMovement(