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tests_custom_buffer.html
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<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8" />
<meta http-equiv="X-UA-Compatible" content="IE=edge" />
<title>TESTS</title>
<meta name="viewport" content="width=device-width, initial-scale=1" />
<link
rel="stylesheet"
type="text/css"
media="screen"
href="css/index.css"
/>
</head>
<body>
<div id="models-container" class="box animate-bottom">
<canvas
class="box side-pane"
id="model-view"
willReadFrequently="true"
></canvas>
</div>
<script type="module">
const style = getComputedStyle(document.body);
const TEXT_COLOR = style
.getPropertyValue("--gui-text-color")
.trim();
const BACKGROUND_COLOR = style
.getPropertyValue("--gui-background-color")
.trim();
const TITLE_BACKGROUND_COLOR = style
.getPropertyValue("--gui-title-background-color")
.trim();
const PLOT_GRID_COLOR = style
.getPropertyValue("--plot-grid-color")
.trim();
const FONT_FAMILY = style.getPropertyValue("--font-family").trim();
const FOCUS_COLOR = style.getPropertyValue("--focus-color").trim();
const LINES_COLOR = style.getPropertyValue("--lines-color").trim();
import {
Tet,
Prism,
Triangle,
} from "./js/TriangularBasedGeometries.js";
import * as THREE from "./js/build/three.module.js";
import { OrbitControls } from "./js/build/OrbitControls.js";
import { AxisGridHelper } from "./js/build/minigui.js";
import GUI from "https://cdn.jsdelivr.net/npm/lil-gui@0.17/+esm";
const canvas = document.getElementById("model-view");
THREE.Object3D.DefaultUp = new THREE.Vector3(0, 0, 1);
const renderer = new THREE.WebGLRenderer({
canvas,
antialias: true,
alpha: true,
});
const gui = new GUI({ title: "Settings" });
const scene = new THREE.Scene();
const gh = new AxisGridHelper(scene, 4, 4, 4);
gh.visible = false;
const fov = 40;
const aspect = 1; // the canvas default
const near = 0.01;
const far = 200;
const camera = new THREE.PerspectiveCamera(fov, aspect, near, far);
camera.position.set(25, 25, 25);
camera.lookAt(0, 0, 0);
scene.add(camera);
const controls = new OrbitControls(camera, canvas);
controls.target.set(0, 0, 0);
controls.update();
// Lights
const light = new THREE.PointLight(0xffffff, 1.0);
camera.add(light);
const material = new THREE.MeshLambertMaterial({
color: FOCUS_COLOR,
emissive: FOCUS_COLOR,
});
const lineMaterial = new THREE.MeshLambertMaterial({
color: PLOT_GRID_COLOR,
linewidth: 3,
wireframe: true,
});
const edgeMaterial = new THREE.LineBasicMaterial({
color: LINES_COLOR,
linewidth: 3,
});
var geometry = new THREE.BufferGeometry();
const config = { divisions: 0, tipo: "Prisma" };
gui.add(config, "divisions", 0, 6, 1)
.onChange(updateGeometry)
.name("Divisiones")
.listen();
gui.add(config, "tipo", ["Prisma", "Triangulo", "Tetrahedro"])
.onChange(updateGeometry)
.name("Geometría")
.listen();
gui.add(gh, "visible").name("Grid").listen();
const types = {
Prisma: Prism,
Triangulo: Triangle,
Tetrahedro: Tet,
};
var tr = new types[config["tipo"]]();
tr.divide(config["divisions"]);
var coordinates = tr.giveCoords().flat();
var vertices = new Float32Array(coordinates);
geometry.setAttribute(
"position",
new THREE.BufferAttribute(vertices, 3)
);
geometry.computeVertexNormals();
var mesh = new THREE.Mesh(geometry, material);
var edgesGeometry = new THREE.EdgesGeometry(geometry);
var lines = new THREE.Mesh(geometry, lineMaterial);
var edges = new THREE.LineSegments(edgesGeometry, edgeMaterial);
function updateGeometry() {
scene.remove(mesh);
mesh.geometry.dispose();
mesh.material.dispose();
scene.remove(lines);
lines.geometry.dispose();
lines.material.dispose();
scene.remove(edges);
edges.geometry.dispose();
edges.material.dispose();
var tr = new types[config["tipo"]]();
tr.divide(config["divisions"]);
const coordinates = tr.giveCoords().flat();
const vertices = new Float32Array(coordinates);
geometry = new THREE.BufferGeometry();
geometry.setAttribute(
"position",
new THREE.BufferAttribute(vertices, 3)
);
geometry.computeVertexNormals();
mesh = new THREE.Mesh(geometry, material);
edgesGeometry = new THREE.EdgesGeometry(geometry);
lines = new THREE.Mesh(geometry, lineMaterial);
edges = new THREE.LineSegments(edgesGeometry, edgeMaterial);
scene.add(mesh);
scene.add(lines);
scene.add(edges);
render();
}
updateGeometry();
zoomExtents();
let animationFrameID = requestAnimationFrame(update);
function transformation0(geo) {
const Z = [];
for (let i = 0; i < geo.attributes.position.count; i++) {
const x = geo.attributes.position.getX(i);
const y = geo.attributes.position.getY(i);
const z = geo.attributes.position.getZ(i);
Z.push([x * 2, y * 2, z * 2]);
geo.attributes.position.setX(i, x * 2);
geo.attributes.position.setY(i, y * 2);
geo.attributes.position.setZ(i, z * 2);
}
return Z;
}
function transformation1(geo) {
for (let i = 0; i < geo.attributes.position.count; i++) {
const x = geo.attributes.position.getX(i) + 0.5;
const y = geo.attributes.position.getY(i) + 0.5;
const z = geo.attributes.position.getZ(i) + 0.5;
geo.attributes.position.setX(i, x * (1 - y));
geo.attributes.position.setY(i, y);
geo.attributes.position.setZ(i, z);
}
}
function transformation2(geo) {
for (let i = 0; i < geo.attributes.position.count; i++) {
const x = geo.attributes.position.getX(i) + 0.5;
const y = geo.attributes.position.getY(i) + 0.5;
const z = geo.attributes.position.getZ(i) + 0.5;
geo.attributes.position.setX(i, x * (1 - y) * (1 - z));
geo.attributes.position.setY(i, y * (1 - z));
geo.attributes.position.setZ(i, z);
}
}
function resizeRendererToDisplaySize() {
const canvas = renderer.domElement;
const pixelRatio = window.devicePixelRatio;
const width = (canvas.clientWidth * pixelRatio) | 0;
const height = (canvas.clientHeight * pixelRatio) | 0;
const needResize =
canvas.width !== width || canvas.height !== height;
if (needResize) {
renderer.setSize(width, height, false);
}
return needResize;
}
function render() {
if (resizeRendererToDisplaySize()) {
const canvas = renderer.domElement;
const aspect = canvas.clientWidth / canvas.clientHeight;
camera.aspect = aspect;
camera.updateProjectionMatrix();
}
renderer.render(scene, camera);
}
function update() {
render();
animationFrameID = requestAnimationFrame(update);
}
function zoomExtents() {
let vFoV = camera.getEffectiveFOV();
let hFoV = camera.fov * camera.aspect;
let FoV = Math.min(vFoV, hFoV);
let FoV2 = FoV / 2;
let dir = new THREE.Vector3();
camera.getWorldDirection(dir);
let bb = mesh.geometry.boundingBox;
let bs = mesh.geometry.boundingSphere;
let bsWorld = bs.center.clone();
mesh.localToWorld(bsWorld);
let th = (FoV2 * Math.PI) / 180.0;
let sina = Math.sin(th);
let R = bs.radius;
let FL = R / sina;
let cameraDir = new THREE.Vector3();
camera.getWorldDirection(cameraDir);
let cameraOffs = cameraDir.clone();
cameraOffs.multiplyScalar(-FL);
let newCameraPos = bsWorld.clone().add(cameraOffs);
camera.position.copy(newCameraPos);
camera.lookAt(bsWorld);
controls.target.copy(bsWorld);
controls.update();
}
</script>
</body>
</html>