Three js
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import React, { useEffect } from "react";
import * as THREE from "three";
export default function Cube() {
useEffect(() => {
const scene = new THREE.Scene();
const raycaster = new THREE.Raycaster();
const pointer = new THREE.Vector2();
let currentIntersect = null;
const canvas = document.getElementById("canvas");
const renderer = new THREE.WebGLRenderer({
canvas,
alpha: true,
antialias: true,
});
renderer.setSize(window.innerWidth / 2, 500);
renderer.setPixelRatio(window.devicePixelRatio);
const camera = new THREE.PerspectiveCamera(
75,
window.innerWidth / 2 / 500,
0.01,
1000
);
camera.position.set(0, 0, 5);
scene.add(new THREE.AmbientLight(0xffffff, Math.PI / 2));
const spotLight = new THREE.SpotLight(0xffffff, Math.PI, "", 0.15, 1, 0);
spotLight.position.set(10, 10, 10);
scene.add(spotLight);
const pointLight = new THREE.PointLight(0xffffff, Math.PI, "", 0);
pointLight.position.set(-10, -10, -10);
scene.add(pointLight);
var geometry1 = new THREE.BoxGeometry(1, 1, 1);
var material1 = new THREE.MeshStandardMaterial({ color: "orange" });
var cube1 = new THREE.Mesh(geometry1, material1);
cube1.position.set(-1.2, 0, 0);
scene.add(cube1);
var geometry2 = new THREE.BoxGeometry(1, 1, 1);
var material2 = new THREE.MeshStandardMaterial({ color: "orange" });
var cube2 = new THREE.Mesh(geometry2, material2);
cube2.position.set(1.2, 0, 0);
scene.add(cube2);
canvas.addEventListener("mousemove", onMouseMove);
canvas.addEventListener("click", onClick);
function onMouseMove(event) {
event.preventDefault();
pointer.x = (event.clientX / canvas.clientWidth) * 2 - 1;
pointer.y = -(event.clientY / 500) * 2 + 1;
}
function onClick(event) {
if (currentIntersect) {
if (currentIntersect.object.scale.x == 1) {
currentIntersect.object.scale.set(1.5, 1.5, 1.5);
return;
}
if (currentIntersect.object.scale.x == 1.5) {
currentIntersect.object.scale.set(1, 1, 1);
return;
}
}
}
const objectsToTest = [cube1, cube2];
function render() {
requestAnimationFrame(render);
raycaster.setFromCamera(pointer, camera);
const intersects = raycaster.intersectObjects(objectsToTest);
if (intersects.length) {
if (!currentIntersect) {
intersects[0].object.material.color.set("hotpink");
}
currentIntersect = intersects[0];
} else {
if (currentIntersect) {
for (const object of objectsToTest) {
if (!intersects.find((intersect) => intersect.object === object)) {
object.material.color.set("orange");
}
}
}
currentIntersect = null;
}
cube1.rotation.x += 0.01;
cube2.rotation.x += 0.01;
renderer.render(scene, camera);
}
render();
}, []);
return (
<div style={{ height: "500px" }}>
<canvas id="canvas"></canvas>
</div>
);
}
// 유용한 사이트 : https://sbcode.net/threejs/
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"use client";
import * as THREE from "three";
import * as React from "react";
import { useRef, useState } from "react";
import { Canvas, useFrame } from "@react-three/fiber";
const Box = (props: JSX.IntrinsicElements["mesh"]) => {
const ref = useRef<THREE.Mesh>(null!);
const [hovered, hover] = useState(false);
const [clicked, click] = useState(false);
useFrame((state, delta) => (ref.current.rotation.x += 0.01));
return (
<mesh
{...props}
ref={ref}
scale={clicked ? 1.5 : 1}
onClick={(event) => click(!clicked)}
onPointerOver={(event) => hover(true)}
onPointerOut={(event) => hover(false)}
>
<boxGeometry args={[1, 1, 1]} />
<meshStandardMaterial color={hovered ? "hotpink" : "orange"} />
</mesh>
);
};
export default function Cube() {
return (
<>
<div style={{ height: "500px" }}>
<Canvas>
<ambientLight intensity={Math.PI / 2} />
<spotLight
position={[10, 10, 10]}
angle={0.15}
penumbra={1}
decay={0}
intensity={Math.PI}
/>
<pointLight
position={[-10, -10, -10]}
decay={0}
intensity={Math.PI}
/>
<Box position={[-1.2, 0, 0]} />
<Box position={[1.2, 0, 0]} />
</Canvas>
</div>
</>
);
}