three.js利用着色器实现波浪效果
效果演示
着色器旗帜
1、实现步骤
1.1创建项目
// 创建一个空项目
import * as THREE from 'three'
//导入轨道控制器
import { OrbitControls } from 'three/examples/jsm/controls/OrbitControls'//1、创建场景
const scene = new THREE.Scene()//2、创建相机
const camera = new THREE.PerspectiveCamera(75,window.innerWidth / window.innerHeight,0.1,1000
) // 参数分别代表，相机角度、屏幕宽高比、近端点，远端点//设置相机位置
camera.position.set(0, 0, 10)
scene.add(camera)//添加环境光和平行光
const ambientLight = new THREE.AmbientLight(0xffffff, 1)
const dirLight = new THREE.DirectionalLight(0xffffff, 1)
dirLight.castShadow = true
scene.add(ambientLight)
scene.add(dirLight)//初始化渲染器
const renderer = new THREE.WebGLRenderer()//设置渲染的尺寸大小
renderer.setSize(window.innerWidth, window.innerHeight)
renderer.shadowMap.enabled = true
renderer.physicallyCorrectLights = true//将webGL渲染的canvas添加到app中
document.getElementById('app').appendChild(renderer.domElement)//创建控制器
const controls = new OrbitControls(camera, renderer.domElement)//设置控制器阻尼，让滑动更有真实感
controls.enableDamping = true//创建坐标轴
const axesHelper = new THREE.AxesHelper(5)
scene.add(axesHelper)//设置时钟
const clock = new THREE.Clock()render()//渲染函数
function render() {const time = clock.getElapsedTime()controls.update()renderer.render(scene, camera)//下一帧渲染完毕再次执行，保证每一帧都渲染requestAnimationFrame(render)
}1.2创建顶点着色器和片元着色器
新建文件夹shader/raw/vertexShader.glsl和shader/raw/fragmentShader.glsl分别存储顶点着色器和片元着色器
// shader/raw/vertexShader.glsl
precision lowp float;
attribute vec3 position;
attribute vec2 uv;uniform mat4 modelMatrix;
uniform mat4 viewMatrix;
uniform mat4 projectionMatrix;
uniform float uTime;//拿到传过来的uTimevarying vec2 vUv;
varying float vElevation;void main() {vUv = uv;vec4 modelPosition = modelMatrix * vec4(position,1.0);//波浪modelPosition.z = sin((modelPosition.x + uTime) * 10.0) * 0.05;modelPosition.z += sin((modelPosition.y + uTime)* 10.0) * 0.05;vElevation = modelPosition.z;gl_Position = projectionMatrix * viewMatrix * modelPosition;
}
// shader/raw/fragmentShader.gls
precision highp float;
varying vec2 vUv;
varying float vElevation;
uniform sampler2D uTexture;void main(){// gl_FragColor = vec4(vUv,0.0,1.0);// float height = vElevation + 0.05 * 10.0;// gl_FragColor = vec4(1.0 * height,0.0,0.0,1.0);//根据uv，取出对应的颜色vec4 textureColor = texture2D(uTexture,vUv);float height = vElevation + 0.05 * 20.0;textureColor.rgb *= height;gl_FragColor = textureColor;
}
1.3导入着色器和纹理
//导入顶点着色器
import basicVertexShader from '@/shader/raw/vertexShader.glsl?raw'
//导入片元着色器
import basicFragmentShader from '@/shader/raw/fragmentShader.glsl?raw'
//导入纹理
const textureLoader = new THREE.TextureLoader()
const imgTexture = textureLoader.load('/static/imgs/ca.jpeg')
1.4创建物体和材质
//创建平面
const floorGeometry = new THREE.PlaneGeometry(1, 1, 64, 64)
// const floorMaterial = new THREE.MeshBasicMaterial({ color: '#00ff00' })
//创建着色器材质
const floorMaterial = new THREE.RawShaderMaterial({//让着色器材质跟随相机等转，顶点着色器vertexShader: basicVertexShader,//片源着色器fragmentShader: basicFragmentShader,// wireframe: true,side: THREE.DoubleSide,//给顶点着色器传的值uniformsuniforms: {uTime: {value: 0,},uTexture: {value: imgTexture,},},
})const floorMesh = new THREE.Mesh(floorGeometry, floorMaterial)
scene.add(floorMesh)
1.5让物体动起来
//渲染函数
function render() {const time = clock.getElapsedTime()floorMaterial.uniforms.uTime.value = time //给片元着色器传的controls.update()renderer.render(scene, camera)//下一帧渲染完毕再次执行，保证每一帧都渲染requestAnimationFrame(render)
}
2、全部代码
import * as THREE from 'three'//目标：学习着色器变量//导入轨道控制器
import { OrbitControls } from 'three/examples/jsm/controls/OrbitControls'//导入顶点着色器
import basicVertexShader from '@/shader/raw/vertexShader.glsl?raw'
//导入片元着色器
import basicFragmentShader from '@/shader/raw/fragmentShader.glsl?raw'//1、创建场景
const scene = new THREE.Scene()//2、创建相机
const camera = new THREE.PerspectiveCamera(75,window.innerWidth / window.innerHeight,0.1,1000
) // 参数分别代表，相机角度、屏幕宽高比、近端点，远端点//设置相机位置
camera.position.set(0, 0, 10)
scene.add(camera)//导入纹理
const textureLoader = new THREE.TextureLoader()
const imgTexture = textureLoader.load('/static/imgs/ca.jpeg')//创建平面
const floorGeometry = new THREE.PlaneGeometry(1, 1, 64, 64)
// const floorMaterial = new THREE.MeshBasicMaterial({ color: '#00ff00' })
//创建着色器材质
const floorMaterial = new THREE.RawShaderMaterial({//让着色器材质跟随相机等转，顶点着色器vertexShader: basicVertexShader,//片源着色器fragmentShader: basicFragmentShader,// wireframe: true,side: THREE.DoubleSide,//给顶点着色器传的值uniformsuniforms: {uTime: {value: 0,},uTexture: {value: imgTexture,},},
})const floorMesh = new THREE.Mesh(floorGeometry, floorMaterial)
scene.add(floorMesh)//添加环境光和平行光
const ambientLight = new THREE.AmbientLight(0xffffff, 1)
const dirLight = new THREE.DirectionalLight(0xffffff, 1)
dirLight.castShadow = true
scene.add(ambientLight)
scene.add(dirLight)//初始化渲染器
const renderer = new THREE.WebGLRenderer()//设置渲染的尺寸大小
renderer.setSize(window.innerWidth, window.innerHeight)
renderer.shadowMap.enabled = true
renderer.physicallyCorrectLights = true//将webGL渲染的canvas添加到app中
document.getElementById('app').appendChild(renderer.domElement)//创建控制器
const controls = new OrbitControls(camera, renderer.domElement)//设置控制器阻尼，让滑动更有真实感
controls.enableDamping = true//创建坐标轴
const axesHelper = new THREE.AxesHelper(5)
scene.add(axesHelper)//设置时钟
const clock = new THREE.Clock()render()//渲染函数
function render() {const time = clock.getElapsedTime()floorMaterial.uniforms.uTime.value = timecontrols.update()renderer.render(scene, camera)//下一帧渲染完毕再次执行，保证每一帧都渲染requestAnimationFrame(render)
}