1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131 | import * as THREE from 'three'
import { OrbitControls } from 'three/examples/jsm/controls/OrbitControls'
import Stats from 'three/examples/jsm/libs/stats.module'
import { GUI } from 'dat.gui'
const scene1 = new THREE.Scene()
const scene2 = new THREE.Scene()
const axesHelper1 = new THREE.AxesHelper(5)
scene1.add(axesHelper1)
const axesHelper2 = new THREE.AxesHelper(5)
scene2.add(axesHelper2)
const camera = new THREE.PerspectiveCamera(75, window.innerWidth / window.innerHeight, 0.1, 1000)
camera.position.z = 1
const renderer = new THREE.WebGLRenderer()
renderer.setSize(window.innerWidth, window.innerHeight)
document.body.appendChild(renderer.domElement)
new OrbitControls(camera, renderer.domElement)
const planeGeometry1 = new THREE.PlaneGeometry()
const planeGeometry2 = new THREE.PlaneGeometry()
// const texture1 = new THREE.TextureLoader().load("img/grid.png")
// const texture2 = new THREE.TextureLoader().load("img/grid.png")
const mipmap = (size: number, color: string) => {
const imageCanvas = document.createElement('canvas') as HTMLCanvasElement
const context = imageCanvas.getContext('2d') as CanvasRenderingContext2D
imageCanvas.width = size
imageCanvas.height = size
context.fillStyle = '#888888'
context.fillRect(0, 0, size, size)
context.fillStyle = color
context.fillRect(0, 0, size / 2, size / 2)
context.fillRect(size / 2, size / 2, size / 2, size / 2)
return imageCanvas
}
const blankCanvas = document.createElement('canvas') as HTMLCanvasElement
blankCanvas.width = 128
blankCanvas.height = 128
const texture1 = new THREE.CanvasTexture(blankCanvas)
texture1.mipmaps[0] = mipmap(128, '#ff0000')
texture1.mipmaps[1] = mipmap(64, '#00ff00')
texture1.mipmaps[2] = mipmap(32, '#0000ff')
texture1.mipmaps[3] = mipmap(16, '#880000')
texture1.mipmaps[4] = mipmap(8, '#008800')
texture1.mipmaps[5] = mipmap(4, '#000088')
texture1.mipmaps[6] = mipmap(2, '#008888')
texture1.mipmaps[7] = mipmap(1, '#880088')
texture1.repeat.set(5, 5)
texture1.wrapS = THREE.RepeatWrapping
texture1.wrapT = THREE.RepeatWrapping
const texture2 = texture1.clone()
texture2.minFilter = THREE.NearestFilter
texture2.magFilter = THREE.NearestFilter
const material1 = new THREE.MeshBasicMaterial({ map: texture1 })
const material2 = new THREE.MeshBasicMaterial({ map: texture2 })
const plane1 = new THREE.Mesh(planeGeometry1, material1)
const plane2 = new THREE.Mesh(planeGeometry2, material2)
scene1.add(plane1)
scene2.add(plane2)
window.addEventListener('resize', onWindowResize, false)
function onWindowResize() {
camera.aspect = window.innerWidth / window.innerHeight
camera.updateProjectionMatrix()
renderer.setSize(window.innerWidth, window.innerHeight)
render()
}
const options = {
minFilters: {
NearestFilter: THREE.NearestFilter,
NearestMipMapLinearFilter: THREE.NearestMipMapLinearFilter,
NearestMipMapNearestFilter: THREE.NearestMipMapNearestFilter,
'LinearFilter ': THREE.LinearFilter,
'LinearMipMapLinearFilter (Default)': THREE.LinearMipMapLinearFilter,
LinearMipmapNearestFilter: THREE.LinearMipmapNearestFilter,
},
magFilters: {
NearestFilter: THREE.NearestFilter,
'LinearFilter (Default)': THREE.LinearFilter,
},
}
const gui = new GUI()
const textureFolder = gui.addFolder('THREE.Texture')
textureFolder.add(texture2, 'minFilter', options.minFilters).onChange(() => updateMinFilter())
textureFolder.add(texture2, 'magFilter', options.magFilters).onChange(() => updateMagFilter())
textureFolder.open()
function updateMinFilter() {
texture2.minFilter = Number(texture2.minFilter) as THREE.MinificationTextureFilter
texture2.needsUpdate = true
}
function updateMagFilter() {
texture2.magFilter = Number(texture2.magFilter) as THREE.MagnificationTextureFilter
texture2.needsUpdate = true
}
const stats = new Stats()
document.body.appendChild(stats.dom)
function animate() {
requestAnimationFrame(animate)
render()
stats.update()
}
function render() {
renderer.setScissorTest(true)
renderer.setScissor(0, 0, window.innerWidth / 2 - 2, window.innerHeight)
renderer.render(scene1, camera)
renderer.setScissor(window.innerWidth / 2, 0, window.innerWidth / 2 - 2, window.innerHeight)
renderer.render(scene2, camera)
renderer.setScissorTest(false)
}
animate()
|
