flo-bit.dev
[READ-ONLY] Mirror of https://github.com/flo-bit/shapecraft.
flo-bit.dev/shapecraft/
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1import { describe, it, expect } from 'vitest'
2import * as THREE from 'three'
3import { box, sphere } from '../src/primitives'
4import { merge, center, clone, decimate } from '../src/ops'
5
6describe('ops', () => {
7 it('merge combines vertex counts', () => {
8 const b = box()
9 const s = sphere()
10 const merged = merge(b, s)
11 expect(merged.vertexCount).toBe(b.vertexCount + s.vertexCount)
12 })
13
14 it('merge handles mixed color/no-color meshes', () => {
15 const colored = box().vertexColor('#ff0000')
16 const plain = sphere()
17 const merged = merge(colored, plain)
18 expect(merged.colors).not.toBeNull()
19 expect(merged.colors!.length).toBe(merged.vertexCount * 3)
20 })
21
22 it('center puts bounding box center at origin', () => {
23 const b = box().translate(10, 10, 10)
24 const centered = center(b)
25 centered.geometry.computeBoundingBox()
26 const c = new THREE.Vector3()
27 centered.geometry.boundingBox!.getCenter(c)
28 expect(c.x).toBeCloseTo(0)
29 expect(c.y).toBeCloseTo(0)
30 expect(c.z).toBeCloseTo(0)
31 })
32
33 it('clone produces independent copy', () => {
34 const b = box()
35 const c = clone(b)
36 expect(c.vertexCount).toBe(b.vertexCount)
37 expect(c.geometry).not.toBe(b.geometry)
38 })
39
40 it('decimate reduces face count while preserving the silhouette', () => {
41 const s = sphere({ radius: 1, widthSegments: 32, heightSegments: 24 })
42 const before = s.faceCount
43 const d = decimate(s, { ratio: 0.3 })
44 expect(d.faceCount).toBeLessThan(before)
45 expect(d.vertexCount).toBeGreaterThan(0)
46 // Bounding box (silhouette) stays close to the original sphere.
47 const bb = d.boundingBox
48 expect(bb.max.x).toBeGreaterThan(0.85)
49 expect(bb.max.x).toBeLessThan(1.15)
50 })
51
52 it('decimate hits an explicit target count', () => {
53 const s = sphere({ radius: 1, widthSegments: 24, heightSegments: 16 })
54 const d = decimate(s, { count: 80 })
55 expect(d.vertexCount).toBeLessThanOrEqual(120)
56 })
57})