feat: transiton and reveal

packages/website/src/components/Tankopedia/HeroSection/components/Options/components/Thicknesses.tsx

@@ -15,7 +15,7 @@ type ThicknessesProps = MaybeSkeletonComponentProps & {
 };
 
 export function Thicknesses({ thicknessRange, skeleton }: ThicknessesProps) {
-  const display = Tankopedia.use((state) => state.display);
+  const display = Tankopedia.use((state) => state.requestedDisplay);
   const showExternalModules = TankopediaPersistent.use(
     (state) => state.showExternalModules
   );

packages/website/src/components/Tankopedia/HeroSection/components/Options/index.tsx

@@ -55,7 +55,7 @@ export function Options({ thicknessRange, canvas, skeleton }: OptionsProps) {
   const hasCustomShell = Tankopedia.use(
     (state) => state.customShell !== undefined
   );
-  const display = Tankopedia.use((state) => state.display);
+  const display = Tankopedia.use((state) => state.requestedDisplay);
   const isFullScreen = useFullScreen();
   const advancedHighlighting = TankopediaPersistent.use(
     (state) => state.advancedHighlighting
@@ -388,7 +388,7 @@ export function Options({ thicknessRange, canvas, skeleton }: OptionsProps) {
             onValueChange={(value) => {
               Tankopedia.mutate((draft) => {
                 draft.disturbed = true;
-                draft.display = Number(value);
+                draft.requestedDisplay = Number(value);
               });
             }}
           >

packages/website/src/components/Tankopedia/HeroSection/components/TankSandbox/components/Lighting.tsx

@@ -1,13 +1,70 @@
+import { useFrame, useThree } from "@react-three/fiber";
+import { useEffect, useRef } from "react";
+import { HemisphereLight, SpotLight, type Group } from "three";
+import { clamp } from "three/src/math/MathUtils.js";
+import { Tankopedia } from "../../../../../../stores/tankopedia";
 import { HelpingSpotLight } from "../../../../../HelpingSpotLight";
 
+const ANGLE = Math.PI / 3;
+const HEMISPHERE_INTENSITY = 4;
+const REVEAL_ANIMATION_TIME = 5;
+const TRANSITION_ANIMATION_TIME = 0.5;
+
 export function Lighting() {
+  const wrapper = useRef<Group>(null!);
+  const t0 = useRef(0);
+  const clock = useThree((state) => state.clock);
+  const display = Tankopedia.use((state) => state.display);
+  const requestedDisplay = Tankopedia.use((state) => state.requestedDisplay);
+  const animationTime = useRef(REVEAL_ANIMATION_TIME);
+
+  useEffect(() => {
+    Tankopedia.mutate((draft) => {
+      draft.revealed = true;
+    });
+
+    t0.current = clock.elapsedTime - REVEAL_ANIMATION_TIME;
+  }, []);
+
+  useFrame(({ clock, invalidate }) => {
+    const x = clamp(
+      (clock.elapsedTime - t0.current) / animationTime.current,
+      0,
+      2
+    );
+    const t = 0.5 * Math.sin(Math.PI * (x + 0.5)) + 0.5;
+
+    for (const child of wrapper.current.children) {
+      if (child instanceof HemisphereLight) {
+        child.intensity = HEMISPHERE_INTENSITY * t;
+      } else if (child instanceof SpotLight) {
+        child.angle = ANGLE * t;
+      }
+    }
+
+    if (x < 2) invalidate();
+
+    if (x === 2 && display !== requestedDisplay) {
+      Tankopedia.mutate((draft) => {
+        draft.display = requestedDisplay;
+      });
+    }
+  });
+
+  useEffect(() => {
+    if (requestedDisplay === display) return;
+
+    t0.current = clock.elapsedTime;
+    animationTime.current = TRANSITION_ANIMATION_TIME;
+  }, [requestedDisplay]);
+
   return (
-    <>
+    <group ref={wrapper}>
       <hemisphereLight
         position={[0, 1, 0]}
         color="#dadaff"
         groundColor="#856331"
-        intensity={4}
+        intensity={0}
       />
 
       <HelpingSpotLight
@@ -18,6 +75,7 @@ export function Lighting() {
         castShadow
         color="#ffffff"
         decay={0}
+        angle={0}
       />
 
       <HelpingSpotLight
@@ -28,7 +86,8 @@ export function Lighting() {
         castShadow
         color="#ffffff"
         decay={0}
+        angle={0}
       />
-    </>
+    </group>
   );
 }

packages/website/src/components/Tankopedia/HeroSection/components/TankSandbox/components/TankModel.tsx

@@ -59,7 +59,10 @@ export function TankModel() {
         }
 
         function onPointerDown(event: ThreeEvent<PointerEvent>) {
-          if (isTrack && Tankopedia.state.display === TankopediaDisplay.Model) {
+          if (
+            isTrack &&
+            Tankopedia.state.requestedDisplay === TankopediaDisplay.Model
+          ) {
             position.set(event.clientX, event.clientY);
             event.stopPropagation();
 
@@ -106,7 +109,9 @@ export function TankModel() {
           const isTurret = node.name.startsWith("turret_");
           const isCurrentTurret =
             node.name ===
-            `turret_${turretModelDefinition.model_id.toString().padStart(2, "0")}`;
+            `turret_${turretModelDefinition.model_id
+              .toString()
+              .padStart(2, "0")}`;
           const isVisible = isCurrentTurret;
           const position = new Vector2();
           const delta = new Vector2();

packages/website/src/components/Tankopedia/HeroSection/components/TankSandbox/index.tsx

@@ -5,7 +5,6 @@ import {
   useEffect,
   useImperativeHandle,
   useRef,
-  useState,
 } from "react";
 import { Fog } from "three";
 import { applyPitchYawLimits } from "../../../../../core/blitz/applyPitchYawLimits";
@@ -49,8 +48,7 @@ export const TankSandbox = forwardRef<HTMLCanvasElement, TankSandboxProps>(
     const turretModelDefinition =
       tankModelDefinition.turrets[protagonistTurret.id];
     const gunModelDefinition = turretModelDefinition.guns[protagonistGun.id];
-    const rawDisplay = Tankopedia.use((state) => state.display);
-    const [display, setDisplay] = useState(rawDisplay);
+    const display = Tankopedia.use((state) => state.requestedDisplay);
     const hideTankModelUnderArmor = TankopediaPersistent.use(
       (state) => state.hideTankModelUnderArmor
     );

packages/website/src/stores/tankopedia.ts

@@ -100,6 +100,7 @@ interface Tankopedia {
   );
   xpMultiplier: (typeof XP_MULTIPLIERS)[number];
   customShell?: ShellDefinition;
+  requestedDisplay: TankopediaDisplay;
   display: TankopediaDisplay;
   statSearch?: string;
 }
@@ -114,5 +115,6 @@ export const Tankopedia = new Varuna<Tankopedia, ModelDefinition>((model) => ({
   skills: createDefaultSkills(skillDefinitions),
   model,
   xpMultiplier: 1,
+  requestedDisplay: TankopediaDisplay.Model,
   display: TankopediaDisplay.Model,
 }));