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 { box, cylinder } from '../src/primitives'
3import { twist, bend, taper } from '../src/modifiers'
4import { smooth } from '../src/modifiers/smooth'
5import { UberNoise } from '../src/noise'
6
7describe('modifiers', () => {
8 it('twist modifies positions', () => {
9 const b = box({ heightSegments: 4 })
10 const twisted = b.warp(twist({ amount: 2 }))
11 // Positions should differ
12 const origPos = b.positions
13 const newPos = twisted.positions
14 let changed = false
15 for (let i = 0; i < origPos.length; i++) {
16 if (Math.abs(origPos[i] - newPos[i]) > 0.001) {
17 changed = true
18 break
19 }
20 }
21 expect(changed).toBe(true)
22 })
23
24 it('taper scales vertices at extremes', () => {
25 const c = cylinder({ height: 2 })
26 // Taper along Y: top should be smaller
27 const tapered = c.warp(taper({ axis: 'y', curve: (t) => 1 - t * 0.5 }))
28 expect(tapered.vertexCount).toBe(c.vertexCount)
29 })
30
31 it('displace moves vertices along normals', () => {
32 const b = box()
33 const displaced = b.displace(() => 0.1)
34 const origPos = b.positions
35 const newPos = displaced.positions
36 let changed = false
37 for (let i = 0; i < origPos.length; i++) {
38 if (Math.abs(origPos[i] - newPos[i]) > 0.001) {
39 changed = true
40 break
41 }
42 }
43 expect(changed).toBe(true)
44 })
45
46 it('displaceNoise produces non-zero displacement', () => {
47 const b = box({ widthSegments: 4, heightSegments: 4, depthSegments: 4 })
48 const noise = new UberNoise({ seed: 42 })
49 const displaced = b.displaceNoise(noise, 0.5)
50 const origPos = b.positions
51 const newPos = displaced.positions
52 let changed = false
53 for (let i = 0; i < origPos.length; i++) {
54 if (Math.abs(origPos[i] - newPos[i]) > 0.001) {
55 changed = true
56 break
57 }
58 }
59 expect(changed).toBe(true)
60 })
61
62 it('smooth produces a mesh with same vertex count (indexed)', () => {
63 const b = box()
64 const smoothed = smooth(b, 1)
65 expect(smoothed.vertexCount).toBe(b.vertexCount)
66 })
67
68 it('bend modifies positions', () => {
69 const b = box({ heightSegments: 4 })
70 const bent = b.warp(bend({ amount: 1 }))
71 const origPos = b.positions
72 const newPos = bent.positions
73 let changed = false
74 for (let i = 0; i < origPos.length; i++) {
75 if (Math.abs(origPos[i] - newPos[i]) > 0.001) {
76 changed = true
77 break
78 }
79 }
80 expect(changed).toBe(true)
81 })
82})