Animated Three.js Components

/**
 * Creates an animated version of any component
 * @param Component - React component to make animatable
 * @returns Animated component that accepts spring values
 */
function animated<T extends ElementType>(Component: T): AnimatedComponent<T>;

// Short alias
const a = animated;

import { animated, useSpring } from "@react-spring/three";

// Using built-in animated primitives
function AnimatedMesh() {
  const springs = useSpring({
    position: [0, 1, 0],
    from: { position: [0, 0, 0] },
  });

  return (
    <animated.mesh {...springs}>
      <boxGeometry />
      <meshStandardMaterial color="blue" />
    </animated.mesh>
  );
}

// Creating custom animated components
const AnimatedCustomComponent = animated(MyCustomThreeComponent);

type Primitives = keyof JSX.IntrinsicElements;

type AnimatedPrimitives = {
  [P in Primitives]: AnimatedComponent<FC<JSX.IntrinsicElements[P]>>;
};

/**
 * All Three.js classes are automatically converted to animated primitives.
 * The primitive names are generated by:
 * 1. Taking all Three.js exports that start with uppercase letter
 * 2. Converting first letter to lowercase
 * 
 * Examples of available animated primitives include:
 * - Geometries: boxGeometry, sphereGeometry, cylinderGeometry, planeGeometry, etc.
 * - Meshes: mesh, instancedMesh, skinnedMesh, etc.
 * - Materials: meshBasicMaterial, meshStandardMaterial, meshPhysicalMaterial, etc.
 * - Lights: ambientLight, directionalLight, pointLight, spotLight, etc.
 * - Cameras: perspectiveCamera, orthographicCamera, etc.
 * - Controls: orbitControls, transformControls, etc.
 * - Plus the special 'primitive' component for arbitrary Three.js objects
 */
const primitives: Primitives[] = ['primitive'].concat(
  Object.keys(THREE)
    .filter(key => /^[A-Z]/.test(key))
    .map(key => key[0].toLowerCase() + key.slice(1))
);

import { animated, useSpring, useTrail } from "@react-spring/three";

// Animating mesh properties
function AnimatedCube() {
  const { rotation, scale } = useSpring({
    rotation: [0, Math.PI * 2, 0],
    scale: [1.2, 1.2, 1.2],
    from: { rotation: [0, 0, 0], scale: [1, 1, 1] },
    loop: true,
  });

  return (
    <animated.mesh rotation={rotation} scale={scale}>
      <animated.boxGeometry args={[1, 1, 1]} />
      <animated.meshStandardMaterial color="orange" />
    </animated.mesh>
  );
}

// Animating material properties
function AnimatedMaterial() {
  const { color, opacity } = useSpring({
    color: "#ff6b6b",
    opacity: 0.8,
    from: { color: "#4ecdc4", opacity: 0.2 },
  });

  return (
    <mesh>
      <boxGeometry />
      <animated.meshStandardMaterial color={color} transparent opacity={opacity} />
    </mesh>
  );
}

// Trail animation for multiple objects
function AnimatedTrail() {
  const trail = useTrail(5, {
    position: [[0, 0, 0], [1, 0, 0], [2, 0, 0], [3, 0, 0], [4, 0, 0]],
    from: { position: [0, -5, 0] },
  });

  return (
    <>
      {trail.map((springs, index) => (
        <animated.mesh key={index} {...springs}>
          <sphereGeometry args={[0.2]} />
          <meshStandardMaterial color="red" />
        </animated.mesh>
      ))}
    </>
  );
}

/**
 * Animated primitive component for arbitrary Three.js objects
 */
interface PrimitiveProps {
  object: any; // Three.js object instance
  [key: string]: any; // Additional props to animate
}

import * as THREE from "three";
import { animated, useSpring } from "@react-spring/three";

function AnimatedCustomObject() {
  const customGeometry = new THREE.TorusKnotGeometry(1, 0.3, 100, 16);
  
  const springs = useSpring({
    rotation: [0, Math.PI, 0],
    from: { rotation: [0, 0, 0] },
  });

  return (
    <animated.primitive object={customGeometry} {...springs}>
      <meshStandardMaterial color="purple" />
    </animated.primitive>
  );
}

import { CSSProperties, ForwardRefExoticComponent, FC, JSX, ElementType } from 'react';
import { AssignableKeys, ComponentPropsWithRef } from '@react-spring/types';
import { FluidValue } from '@react-spring/shared';

type AnimatedComponent<T extends ElementType> =
  ForwardRefExoticComponent<AnimatedProps<ComponentPropsWithRef<T>>>;

type AnimatedProps<Props extends object> = {
  [P in keyof Props]: P extends 'ref' | 'key'
    ? Props[P]
    : AnimatedProp<Props[P]>;
};

// Complex type for animated prop values that handles style objects and arrays
type AnimatedProp<T> = [T, T] extends [infer T, infer DT]
  ? [DT] extends [never]
    ? never
    : DT extends void
      ? undefined
      : DT extends object
        ? [AssignableKeys<DT, CSSProperties>] extends [never]
          ? DT extends ReadonlyArray<any>
            ? AnimatedStyles<DT>
            : DT
          : AnimatedStyle<T>
        : DT | AnimatedLeaf<T>
  : never;

// Animated array of style objects
type AnimatedStyles<T extends ReadonlyArray<any>> = {
  [P in keyof T]: [T[P]] extends [infer DT]
    ? DT extends object
      ? [AssignableKeys<DT, CSSProperties>] extends [never]
        ? DT extends ReadonlyArray<any>
          ? AnimatedStyles<DT>
          : DT
        : { [P in keyof DT]: AnimatedProp<DT[P]> }
      : DT
    : never;
};

// Animated object of style attributes
type AnimatedStyle<T> = [T, T] extends [infer T, infer DT]
  ? DT extends void
    ? undefined
    : [DT] extends [never]
      ? never
      : DT extends object
        ? { [P in keyof DT]: AnimatedStyle<DT[P]> }
        : DT | AnimatedLeaf<T>
  : never;

// Animated primitive (or an array of them)
type AnimatedLeaf<T> =
  | Exclude<T, object | void>
  | Extract<T, ReadonlyArray<number | string>> extends infer U
  ? [U] extends [never]
    ? never
    : FluidValue<U | Exclude<T, object | void>>
  : never;

// The type of the animated() function
type WithAnimated = {
  <T extends ElementType>(wrappedComponent: T): AnimatedComponent<T>;
} & AnimatedPrimitives;