Enhance CDN packages and playground

Amp-Thread-ID: https://ampcode.com/threads/T-01a02485-5574-707c-bff4-5668d83bee8a Co-authored-by: Heaust Azure <heaust.azure@gmail.com>
2026-08-22 06:21:39 +00:00
parent 7070799862
commit d95e099fa4
17 changed files with 1870 additions and 247 deletions
@@ -0,0 +1,57 @@
+import { Mesh, type MeshOptions } from "../Mesh";
+import type { Scene } from "../Scene";
+
+export type CubeOptions = Omit<MeshOptions, "geometryId" | "vertexData"> & {
+  size?: number;
+  width?: number;
+  height?: number;
+  depth?: number;
+};
+
+function dimension(value: number, name: string) {
+  if (!Number.isFinite(value) || value <= 0) throw new RangeError(name);
+  return value / 2;
+}
+
+/** A six-sided mesh with independent vertices and normals for every face. */
+export class Cube extends Mesh {
+  constructor(scene: Scene, options: CubeOptions = {}) {
+    const {
+      size = 1,
+      width = size,
+      height = size,
+      depth = size,
+      ...meshOptions
+    } = options;
+    const x = dimension(width, "width");
+    const y = dimension(height, "height");
+    const z = dimension(depth, "depth");
+    const positions = [
+      [-x, -y, z, x, -y, z, x, y, z, -x, y, z],
+      [x, -y, -z, -x, -y, -z, -x, y, -z, x, y, -z],
+      [x, -y, z, x, -y, -z, x, y, -z, x, y, z],
+      [-x, -y, -z, -x, -y, z, -x, y, z, -x, y, -z],
+      [-x, y, z, x, y, z, x, y, -z, -x, y, -z],
+      [-x, -y, -z, x, -y, -z, x, -y, z, -x, -y, z],
+    ].flat();
+    const normals = [
+      [0, 0, 1, 0, 0, 1, 0, 0, 1, 0, 0, 1],
+      [0, 0, -1, 0, 0, -1, 0, 0, -1, 0, 0, -1],
+      [1, 0, 0, 1, 0, 0, 1, 0, 0, 1, 0, 0],
+      [-1, 0, 0, -1, 0, 0, -1, 0, 0, -1, 0, 0],
+      [0, 1, 0, 0, 1, 0, 0, 1, 0, 0, 1, 0],
+      [0, -1, 0, 0, -1, 0, 0, -1, 0, 0, -1, 0],
+    ].flat();
+    const uvs = Array.from({ length: 6 }, () => [
+      0, 0, 1, 0, 1, 1, 0, 1,
+    ]).flat();
+    const indices = Array.from({ length: 6 }, (_, face) => {
+      const vertex = face * 4;
+      return [vertex, vertex + 1, vertex + 2, vertex, vertex + 2, vertex + 3];
+    }).flat();
+    super(scene, {
+      ...meshOptions,
+      vertexData: { positions, normals, uvs, indices },
+    });
+  }
+}