直線の描画のテスト

<!DOCTYPE html>
<html lang="ja">
<head>
<meta charset="utf-8" />
<meta name = "viewport" content = "width=device-width, initial-scale = 1.0">
<title>テスト</title>
<style>
#canvas {
    display: block;
    margin-bottom: 10px;
}
</style>
</head>

<body>

<canvas id="canvas"></canvas>
  
<script type="module">
    import * as THREE from "https://cdn.jsdelivr.net/npm/three@0.167.0/build/three.module.js";

    // サイズを指定
    const width = 360;
    const height = 360;

    // レンダラー,シーン,カメラを作成
    const renderer = new THREE.WebGLRenderer({
        canvas: document.getElementById('canvas'),
    });
    const scene = new THREE.Scene();
    const camera = new THREE.PerspectiveCamera(45, width / height);

    // 箱
    /** @type {THREE.Mesh} */
    let box;

    window.onload = () => {
        renderer.setPixelRatio(window.devicePixelRatio);
        renderer.setSize(width, height);
        camera.position.set(0, 0, 150);

        addObjects();

        const INTERVAL = 1000 / 60;
        let nextUpdateTime = new Date().getTime() + INTERVAL;
        frameProc();

        function frameProc(){
            const curTime = new Date().getTime();
            if(nextUpdateTime < curTime){
                nextUpdateTime +=  INTERVAL;
                update();
            }
            requestAnimationFrame(() => frameProc());
        }
    }

    function addObjects(){
        const geometry = new THREE.BoxGeometry(32, 32, 32);
        const material = new THREE.MeshNormalMaterial();
        box = new THREE.Mesh(geometry, material);
        scene.add(box);

        const lineX = createLine(1000, 0, 0, -1000, 0, 0, 0xff0000)
        scene.add(lineX);

        const lineY = createLine(0, 1000, 0, 0, -1000, 0, 0x00ff00)
        scene.add(lineY);
    }

    // 色がcolorの（x1, y1, z1）と（x2, y2, z2）を結ぶ直線を生成する
    function createLine(x1, y1, z1, x2, y2, z2, color){
        const lineMaterial = new THREE.LineBasicMaterial({ color: color });
        const lineGeometry = new THREE.BufferGeometry();
        const vertices = new Float32Array( [
            x1, y1,  z1,
            x2, y2,  z2,
        ] );
        lineGeometry.setAttribute( 'position', new THREE.BufferAttribute( vertices, 3 ) );
        return new THREE.Line(lineGeometry, lineMaterial);
    }

    // 更新処理
    function update() {
        box.rotation.y += 0.02;
        renderer.render(scene, camera); // レンダリング
    }
</script>
</body>
</html>