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webgl_camera.html
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<!DOCTYPE html>
<html lang="en">
<head>
<title>Verge3D webgl - cameras</title>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, user-scalable=no, minimum-scale=1.0, maximum-scale=1.0">
<link type="text/css" rel="stylesheet" href="main.css">
<style>
b {
color: lightgreen;
}
</style>
</head>
<body>
<div id="info"><a href="https://www.soft8soft.com/verge3d" target="_blank" rel="noopener">Verge3D</a> - cameras<br/>
<b>O</b> orthographic <b>P</b> perspective
</div>
<!-- Import maps polyfill -->
<!-- Remove this when import maps will be widely supported -->
<script async src="https://unpkg.com/[email protected]/dist/es-module-shims.js"></script>
<script type="importmap">
{
"imports": {
"v3d": "../build/v3d.module.js",
"v3d/addons/": "./jsm/"
}
}
</script>
<script type="module">
import * as v3d from 'v3d';
import Stats from 'v3d/addons/libs/stats.module.js';
let SCREEN_WIDTH = window.innerWidth;
let SCREEN_HEIGHT = window.innerHeight;
let aspect = SCREEN_WIDTH / SCREEN_HEIGHT;
let container, stats;
let camera, scene, renderer, mesh;
let cameraRig, activeCamera, activeHelper;
let cameraPerspective, cameraOrtho;
let cameraPerspectiveHelper, cameraOrthoHelper;
const frustumSize = 600;
init();
animate();
function init() {
container = document.createElement('div');
document.body.appendChild(container);
scene = new v3d.Scene();
//
camera = new v3d.PerspectiveCamera(50, 0.5 * aspect, 1, 10000);
camera.position.z = 2500;
cameraPerspective = new v3d.PerspectiveCamera(50, 0.5 * aspect, 150, 1000);
cameraPerspectiveHelper = new v3d.CameraHelper(cameraPerspective);
scene.add(cameraPerspectiveHelper);
//
cameraOrtho = new v3d.OrthographicCamera(0.5 * frustumSize * aspect / -2, 0.5 * frustumSize * aspect / 2, frustumSize / 2, frustumSize / -2, 150, 1000);
cameraOrthoHelper = new v3d.CameraHelper(cameraOrtho);
scene.add(cameraOrthoHelper);
//
activeCamera = cameraPerspective;
activeHelper = cameraPerspectiveHelper;
// counteract different front orientation of cameras vs rig
cameraOrtho.rotation.y = Math.PI;
cameraPerspective.rotation.y = Math.PI;
cameraRig = new v3d.Group();
cameraRig.add(cameraPerspective);
cameraRig.add(cameraOrtho);
scene.add(cameraRig);
//
mesh = new v3d.Mesh(
new v3d.SphereGeometry(100, 16, 8),
new v3d.MeshBasicMaterial({ color: 0xffffff, wireframe: true })
);
scene.add(mesh);
const mesh2 = new v3d.Mesh(
new v3d.SphereGeometry(50, 16, 8),
new v3d.MeshBasicMaterial({ color: 0x00ff00, wireframe: true })
);
mesh2.position.y = 150;
mesh.add(mesh2);
const mesh3 = new v3d.Mesh(
new v3d.SphereGeometry(5, 16, 8),
new v3d.MeshBasicMaterial({ color: 0x0000ff, wireframe: true })
);
mesh3.position.z = 150;
cameraRig.add(mesh3);
//
const geometry = new v3d.BufferGeometry();
const vertices = [];
for (let i = 0; i < 10000; i++) {
vertices.push(v3d.MathUtils.randFloatSpread(2000)); // x
vertices.push(v3d.MathUtils.randFloatSpread(2000)); // y
vertices.push(v3d.MathUtils.randFloatSpread(2000)); // z
}
geometry.setAttribute('position', new v3d.Float32BufferAttribute(vertices, 3));
const particles = new v3d.Points(geometry, new v3d.PointsMaterial({ color: 0x888888 }));
scene.add(particles);
//
renderer = new v3d.WebGLRenderer({ antialias: true });
renderer.setPixelRatio(window.devicePixelRatio);
renderer.setSize(SCREEN_WIDTH, SCREEN_HEIGHT);
container.appendChild(renderer.domElement);
renderer.autoClear = false;
//
stats = new Stats();
container.appendChild(stats.dom);
//
window.addEventListener('resize', onWindowResize);
document.addEventListener('keydown', onKeyDown);
}
//
function onKeyDown(event) {
switch (event.keyCode) {
case 79: /*O*/
activeCamera = cameraOrtho;
activeHelper = cameraOrthoHelper;
break;
case 80: /*P*/
activeCamera = cameraPerspective;
activeHelper = cameraPerspectiveHelper;
break;
}
}
//
function onWindowResize() {
SCREEN_WIDTH = window.innerWidth;
SCREEN_HEIGHT = window.innerHeight;
aspect = SCREEN_WIDTH / SCREEN_HEIGHT;
renderer.setSize(SCREEN_WIDTH, SCREEN_HEIGHT);
camera.aspect = 0.5 * aspect;
camera.updateProjectionMatrix();
cameraPerspective.aspect = 0.5 * aspect;
cameraPerspective.updateProjectionMatrix();
cameraOrtho.left = -0.5 * frustumSize * aspect / 2;
cameraOrtho.right = 0.5 * frustumSize * aspect / 2;
cameraOrtho.top = frustumSize / 2;
cameraOrtho.bottom = -frustumSize / 2;
cameraOrtho.updateProjectionMatrix();
}
//
function animate() {
requestAnimationFrame(animate);
render();
stats.update();
}
function render() {
const r = Date.now() * 0.0005;
mesh.position.x = 700 * Math.cos(r);
mesh.position.z = 700 * Math.sin(r);
mesh.position.y = 700 * Math.sin(r);
mesh.children[0].position.x = 70 * Math.cos(2 * r);
mesh.children[0].position.z = 70 * Math.sin(r);
if (activeCamera === cameraPerspective) {
cameraPerspective.fov = 35 + 30 * Math.sin(0.5 * r);
cameraPerspective.far = mesh.position.length();
cameraPerspective.updateProjectionMatrix();
cameraPerspectiveHelper.update();
cameraPerspectiveHelper.visible = true;
cameraOrthoHelper.visible = false;
} else {
cameraOrtho.far = mesh.position.length();
cameraOrtho.updateProjectionMatrix();
cameraOrthoHelper.update();
cameraOrthoHelper.visible = true;
cameraPerspectiveHelper.visible = false;
}
cameraRig.lookAt(mesh.position);
renderer.clear();
activeHelper.visible = false;
renderer.setViewport(0, 0, SCREEN_WIDTH / 2, SCREEN_HEIGHT);
renderer.render(scene, activeCamera);
activeHelper.visible = true;
renderer.setViewport(SCREEN_WIDTH / 2, 0, SCREEN_WIDTH / 2, SCREEN_HEIGHT);
renderer.render(scene, camera);
}
</script>
</body>
</html>