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RibbonAndSomeShape_Instanced_SimInteract_GPGPU.html
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<!DOCTYPE html>
<html lang="en">
<head>
<title>Particle_SimInteract_GPGPU</title>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, user-scalable=no, minimum-scale=1.0, maximum-scale=1.0">
<link type="text/css" rel="stylesheet" href="main.css">
</head>
<style>
body {
margin: 0;
padding: 0;
overflow: hidden;
}
.note {
position: fixed;
top: 50px;
left: 50%;
width: 100%;
height: 100px;
color: rgb(255, 255, 255);
font-size: .5rem;
z-index: 99;
}
</style>
<body>
<div class="note">
</div>
<div id="canvas"></div>
<script id="viewDf-vert" type="x-shader/x-vertex">
varying vec2 vUv;
void main() {
vUv = uv;
gl_Position = projectionMatrix * modelViewMatrix * vec4(position, 1.0);
}
</script>
<script id="viewGPGPU_Pos-frag" type="x-shader/x-fragment">
varying vec2 vUv;
uniform sampler2D tPos;
void main() {
vec4 outColor = texture2D( tPos, vUv );
if(vUv.x < 0.01 || vUv.y < 0.01 || vUv.x > 0.99 || vUv.y > 0.99 ) {
outColor.xyz = vec3(1.,0.,0.);
}
gl_FragColor = vec4(outColor.xyz,1.);
}
</script>
<script id="viewGPGPU_Vel-frag" type="x-shader/x-fragment">
varying vec2 vUv;
uniform sampler2D tVel;
void main() {
vec4 outColor = texture2D( tVel, vUv );
if(vUv.x < 0.01 || vUv.y < 0.01 || vUv.x > 0.99 || vUv.y > 0.99 ) {
outColor.xyz = vec3(1.,0.,0.);
}
gl_FragColor = vec4(outColor.xyz ,1.);
}
</script>
<script id="viewGPGPU_Extra-frag" type="x-shader/x-fragment">
varying vec2 vUv;
uniform sampler2D tExtra;
void main() {
vec4 outColor = texture2D( tExtra, vUv );
if(vUv.x < 0.01 || vUv.y < 0.01 || vUv.x > 0.99 || vUv.y > 0.99 ) {
outColor.xyz = vec3(1.,0.,0.);
}
gl_FragColor = vec4(outColor.xyz ,1.);
}
</script>
<script id="frag_Pos_GPGPU" type="x-shader/x-fragment">
uniform float time;
uniform float delta;
uniform sampler2D tNormalFont;
uniform sampler2D tDepthFont;
uniform sampler2D tNormalBack;
uniform sampler2D tDepthBack;
uniform mat4 shadowMatrix0;
uniform mat4 shadowMatrix1;
uniform mat4 projInvert0;
uniform mat4 projInvert1;
uniform mat4 viewInvert0;
uniform mat4 viewInvert1;
vec3 mod289(vec3 x) { return x - floor(x * (1.0 / 289.0)) * 289.0; }
vec4 mod289(vec4 x) { return x - floor(x * (1.0 / 289.0)) * 289.0; }
vec4 permute(vec4 x) { return mod289(((x*34.0)+1.0)*x); }
vec4 taylorInvSqrt(vec4 r) { return 1.79284291400159 - 0.85373472095314 * r;}
float snoise(vec3 v) {
const vec2 C = vec2(1.0/6.0, 1.0/3.0) ;
const vec4 D = vec4(0.0, 0.5, 1.0, 2.0);
vec3 i = floor(v + dot(v, C.yyy) );
vec3 x0 = v - i + dot(i, C.xxx) ;
vec3 g = step(x0.yzx, x0.xyz);
vec3 l = 1.0 - g;
vec3 i1 = min( g.xyz, l.zxy );
vec3 i2 = max( g.xyz, l.zxy );
vec3 x1 = x0 - i1 + C.xxx;
vec3 x2 = x0 - i2 + C.yyy; // 2.0*C.x = 1/3 = C.y
vec3 x3 = x0 - D.yyy; // -1.0+3.0*C.x = -0.5 = -D.y
i = mod289(i);
vec4 p = permute( permute( permute(
i.z + vec4(0.0, i1.z, i2.z, 1.0 ))
+ i.y + vec4(0.0, i1.y, i2.y, 1.0 ))
+ i.x + vec4(0.0, i1.x, i2.x, 1.0 ));
float n_ = 0.142857142857; // 1.0/7.0
vec3 ns = n_ * D.wyz - D.xzx;
vec4 j = p - 49.0 * floor(p * ns.z * ns.z); // mod(p,7*7)
vec4 x_ = floor(j * ns.z);
vec4 y_ = floor(j - 7.0 * x_ ); // mod(j,N)
vec4 x = x_ *ns.x + ns.yyyy;
vec4 y = y_ *ns.x + ns.yyyy;
vec4 h = 1.0 - abs(x) - abs(y);
vec4 b0 = vec4( x.xy, y.xy );
vec4 b1 = vec4( x.zw, y.zw );
vec4 s0 = floor(b0)*2.0 + 1.0;
vec4 s1 = floor(b1)*2.0 + 1.0;
vec4 sh = -step(h, vec4(0.0));
vec4 a0 = b0.xzyw + s0.xzyw*sh.xxyy ;
vec4 a1 = b1.xzyw + s1.xzyw*sh.zzww ;
vec3 p0 = vec3(a0.xy,h.x);
vec3 p1 = vec3(a0.zw,h.y);
vec3 p2 = vec3(a1.xy,h.z);
vec3 p3 = vec3(a1.zw,h.w);
vec4 norm = taylorInvSqrt(vec4(dot(p0,p0), dot(p1,p1), dot(p2, p2), dot(p3,p3)));
p0 *= norm.x;
p1 *= norm.y;
p2 *= norm.z;
p3 *= norm.w;
vec4 m = max(0.6 - vec4(dot(x0,x0), dot(x1,x1), dot(x2,x2), dot(x3,x3)), 0.0);
m = m * m;
return 42.0 * dot( m*m, vec4( dot(p0,x0), dot(p1,x1),
dot(p2,x2), dot(p3,x3) ) );
}
vec3 snoiseVec3( vec3 x ){
float s = snoise(vec3( x ));
float s1 = snoise(vec3( x.y - 19.1 , x.z + 33.4 , x.x + 47.2 ));
float s2 = snoise(vec3( x.z + 74.2 , x.x - 124.5 , x.y + 99.4 ));
vec3 c = vec3( s , s1 , s2 );
return c;
}
vec3 curlNoise( vec3 p ){
const float e = .1;
vec3 dx = vec3( e , 0.0 , 0.0 );
vec3 dy = vec3( 0.0 , e , 0.0 );
vec3 dz = vec3( 0.0 , 0.0 , e );
vec3 p_x0 = snoiseVec3( p - dx );
vec3 p_x1 = snoiseVec3( p + dx );
vec3 p_y0 = snoiseVec3( p - dy );
vec3 p_y1 = snoiseVec3( p + dy );
vec3 p_z0 = snoiseVec3( p - dz );
vec3 p_z1 = snoiseVec3( p + dz );
float x = p_y1.z - p_y0.z - p_z1.y + p_z0.y;
float y = p_z1.x - p_z0.x - p_x1.z + p_x0.z;
float z = p_x1.y - p_x0.y - p_y1.x + p_y0.x;
const float divisor = 1.0 / ( 2.0 * e );
return normalize( vec3( x , y , z ) * divisor );
}
vec2 rotate(vec2 v, float a) {
float s = sin(a);
float c = cos(a);
mat2 m = mat2(c, -s, s, c);
return m * v;
}
#define PI 3.141592653
void main() {
vec2 uv = gl_FragCoord.xy / resolution.xy;
vec4 tmpPos = texture2D( texturePosition, uv );
vec3 posSelf = tmpPos.xyz;
vec3 velSelf = texture2D( textureVelocity, uv ).xyz;
vec3 extraSelf = texture2D( textureExtra, uv ).xyz;
float posOffset = mix(extraSelf.g, 1.0, .9);
vec3 acc = curlNoise(posSelf * posOffset + delta);
float life = tmpPos.w;
float maxYSet = 8.;
float activeOnYSet = 7.;
if(posSelf.y > maxYSet) {
posSelf.y = -maxYSet;
}
if (posSelf.y >= activeOnYSet && posSelf.y < maxYSet) {
life = 1.0 - ((posSelf.y - activeOnYSet) / 2.0);
} else if (posSelf.y >= maxYSet) {
life = 0.0;
posSelf.y = -maxYSet;
} else if (posSelf.y >= -maxYSet && posSelf.y < -activeOnYSet) {
life = (posSelf.y + maxYSet) / 2.0;
}
posSelf += velSelf * 0.3;
gl_FragColor = vec4( posSelf, life );
}
</script>
<script id="frag_Vel_GPGPU" type="x-shader/x-fragment">
uniform float time;
uniform float delta;
uniform vec2 mouse;
uniform sampler2D tNormalFont;
uniform sampler2D tDepthFont;
uniform sampler2D tNormalBack;
uniform sampler2D tDepthBack;
uniform mat4 shadowMatrix0;
uniform mat4 shadowMatrix1;
uniform mat4 projInvert0;
uniform mat4 projInvert1;
uniform mat4 viewInvert0;
uniform mat4 viewInvert1;
vec3 mod289(vec3 x) { return x - floor(x * (1.0 / 289.0)) * 289.0; }
vec4 mod289(vec4 x) { return x - floor(x * (1.0 / 289.0)) * 289.0; }
vec4 permute(vec4 x) { return mod289(((x*34.0)+1.0)*x); }
vec4 taylorInvSqrt(vec4 r) { return 1.79284291400159 - 0.85373472095314 * r;}
float snoise(vec3 v) {
const vec2 C = vec2(1.0/6.0, 1.0/3.0) ;
const vec4 D = vec4(0.0, 0.5, 1.0, 2.0);
vec3 i = floor(v + dot(v, C.yyy) );
vec3 x0 = v - i + dot(i, C.xxx) ;
vec3 g = step(x0.yzx, x0.xyz);
vec3 l = 1.0 - g;
vec3 i1 = min( g.xyz, l.zxy );
vec3 i2 = max( g.xyz, l.zxy );
vec3 x1 = x0 - i1 + C.xxx;
vec3 x2 = x0 - i2 + C.yyy; // 2.0*C.x = 1/3 = C.y
vec3 x3 = x0 - D.yyy; // -1.0+3.0*C.x = -0.5 = -D.y
i = mod289(i);
vec4 p = permute( permute( permute(
i.z + vec4(0.0, i1.z, i2.z, 1.0 ))
+ i.y + vec4(0.0, i1.y, i2.y, 1.0 ))
+ i.x + vec4(0.0, i1.x, i2.x, 1.0 ));
float n_ = 0.142857142857; // 1.0/7.0
vec3 ns = n_ * D.wyz - D.xzx;
vec4 j = p - 49.0 * floor(p * ns.z * ns.z); // mod(p,7*7)
vec4 x_ = floor(j * ns.z);
vec4 y_ = floor(j - 7.0 * x_ ); // mod(j,N)
vec4 x = x_ *ns.x + ns.yyyy;
vec4 y = y_ *ns.x + ns.yyyy;
vec4 h = 1.0 - abs(x) - abs(y);
vec4 b0 = vec4( x.xy, y.xy );
vec4 b1 = vec4( x.zw, y.zw );
vec4 s0 = floor(b0)*2.0 + 1.0;
vec4 s1 = floor(b1)*2.0 + 1.0;
vec4 sh = -step(h, vec4(0.0));
vec4 a0 = b0.xzyw + s0.xzyw*sh.xxyy ;
vec4 a1 = b1.xzyw + s1.xzyw*sh.zzww ;
vec3 p0 = vec3(a0.xy,h.x);
vec3 p1 = vec3(a0.zw,h.y);
vec3 p2 = vec3(a1.xy,h.z);
vec3 p3 = vec3(a1.zw,h.w);
vec4 norm = taylorInvSqrt(vec4(dot(p0,p0), dot(p1,p1), dot(p2, p2), dot(p3,p3)));
p0 *= norm.x;
p1 *= norm.y;
p2 *= norm.z;
p3 *= norm.w;
vec4 m = max(0.6 - vec4(dot(x0,x0), dot(x1,x1), dot(x2,x2), dot(x3,x3)), 0.0);
m = m * m;
return 42.0 * dot( m*m, vec4( dot(p0,x0), dot(p1,x1),
dot(p2,x2), dot(p3,x3) ) );
}
vec3 snoiseVec3( vec3 x ){
float s = snoise(vec3( x ));
float s1 = snoise(vec3( x.y - 19.1 , x.z + 33.4 , x.x + 47.2 ));
float s2 = snoise(vec3( x.z + 74.2 , x.x - 124.5 , x.y + 99.4 ));
vec3 c = vec3( s , s1 , s2 );
return c;
}
vec3 curlNoise( vec3 p ){
const float e = .1;
vec3 dx = vec3( e , 0.0 , 0.0 );
vec3 dy = vec3( 0.0 , e , 0.0 );
vec3 dz = vec3( 0.0 , 0.0 , e );
vec3 p_x0 = snoiseVec3( p - dx );
vec3 p_x1 = snoiseVec3( p + dx );
vec3 p_y0 = snoiseVec3( p - dy );
vec3 p_y1 = snoiseVec3( p + dy );
vec3 p_z0 = snoiseVec3( p - dz );
vec3 p_z1 = snoiseVec3( p + dz );
float x = p_y1.z - p_y0.z - p_z1.y + p_z0.y;
float y = p_z1.x - p_z0.x - p_x1.z + p_x0.z;
float z = p_x1.y - p_x0.y - p_y1.x + p_y0.x;
const float divisor = 1.0 / ( 2.0 * e );
return normalize( vec3( x , y , z ) * divisor );
}
vec2 rotate(vec2 v, float a) {
float s = sin(a);
float c = cos(a);
mat2 m = mat2(c, -s, s, c);
return m * v;
}
#define PI 3.141592653
void main() {
vec2 uv = gl_FragCoord.xy / resolution.xy;
vec3 posSelf = texture2D( texturePosition, uv ).xyz;
vec3 velSelf = texture2D( textureVelocity, uv ).xyz;
vec3 extraSelf = texture2D( textureExtra, uv ).xyz;
float posOffset = 0.1;
vec3 acc = curlNoise(posSelf * posOffset + delta * 0.005);
acc.y += 1.0;
acc.y *= 0.85;
float speedOffset = mix(extraSelf.g, 1.0, .9);
// rotation
vec2 dir = normalize(posSelf.xz);
dir = rotate(dir, PI * 0.75);
acc.xz += dir * 0.7; // > 4 to have tornal
velSelf += acc * .01 * speedOffset;
//rand dir
vec2 dirRand = normalize(extraSelf.xz);
dirRand = rotate(dirRand, PI * 0.75);
float life = 1.;
float maxYSet = 8.;
// hit
float dHit = distance(mouse * 2.,posSelf.xy);
vec3 normal = normalize(posSelf); // Normal của mặt phẳng
vec3 reflectedVel = reflect(velSelf, normal);
// if(dHit < .5) velSelf = reflectedVel;
float dowSpeed = 1.;
if(time > 7.2) dowSpeed = .72;
const float decrease = .96;
velSelf *= decrease;
// velSelf *= dowSpeed;
gl_FragColor = vec4( velSelf,1.);
}
</script>
<script id="frag_Extra_GPGPU" type="x-shader/x-fragment">
void main() {
vec2 uv = gl_FragCoord.xy / resolution.xy;
vec4 extra = texture2D( textureExtra, uv );
gl_FragColor = vec4(extra.rgb ,1.);
}
</script>
<!-- main obj -->
<script id="frag_point" type="x-shader/x-fragment">
varying vec3 vPos;
uniform sampler2D texturePoint;
varying vec2 vUv;
varying float life;
#define uMapSize vec2(1024.0)
#define FOG_DENSITY 0.001
#define LIGHT_POS vec3(0.0, 10.0, 0.0)
float rand(vec4 seed4) {
float dot_product = dot(seed4, vec4(12.9898,78.233,45.164,94.673));
return fract(sin(dot_product) * 43758.5453);
}
float PCFShadow(sampler2D depths, vec2 size, vec4 shadowCoord) {
float result = 0.0;
float bias = 0.005;
vec2 uv = shadowCoord.xy;
for(int x=-1; x<=1; x++){
for(int y=-1; y<=1; y++){
vec2 off = vec2(x,y) + rand(vec4(gl_FragCoord.xy, float(x), float(y)));
off /= size;
float d = texture2D(depths, uv + off).r;
if(d < shadowCoord.z - bias) {
result += 1.0;
}
}
}
return 1.0 -result/9.0;
}
float fogFactorExp2(const float dist, const float density) {
const float LOG2 = -1.442695;
float d = density * dist;
return 1.0 - clamp(exp2(d * d * LOG2), 0.0, 1.0);
}
float diffuse(vec3 N, vec3 L) {
return max(dot(N, normalize(L)), 0.0);
}
vec3 diffuse(vec3 N, vec3 L, vec3 C) {
return diffuse(N, L) * C;
}
float sdCircle( vec2 p, float r )
{
return length(p) - r;
}
void main() {
vec2 uv = gl_PointCoord;
float cc = sdCircle(vec2(uv.x-.5,uv.y-.5),.2);
cc = step(cc,.15);
// uv.y = 1.0 - uv.y;
vec4 colorMap = texture2D(texturePoint, uv);
if(colorMap.r <= 0.0) {
discard;
}
vec3 N = colorMap.rgb * 2.0 - 1.0;
float d = diffuse(N, LIGHT_POS);
vec3 finalColor = mix(vec3(d), vPos.xyz, .5);
vec4 color = vec4(finalColor, 1.0);
float fogDistance = gl_FragCoord.z / gl_FragCoord.w;
float fogAmount = fogFactorExp2(fogDistance - 4.5, FOG_DENSITY);
const vec4 fogColor = vec4(0.0, 0.0, 0.0, 1.0); // white
vec4 mixOut = mix(color, fogColor, fogAmount);
gl_FragColor = color;
gl_FragColor = vec4(vec3(cc) * colorMap.xyz / 0.92,cc);
}
</script>
<script type="importmap">
{
"imports": {
"three": "./three.module.js",
"three/addons/": "./jsm/"
}
}
</script>
<script type="module">
import * as THREE from 'three';
import Stats from 'three/addons/stats.module.js';
import { GUI } from 'three/addons/lil-gui.module.min.js';
import { OBJLoader } from 'three/addons/OBJLoader.js';
import { DRACOLoader } from 'three/addons/DRACOLoader.js';
import { GPUComputationRenderer } from 'three/addons/GPUComputationRenderer.js';
import { OrbitControls } from 'three/addons/OrbitControls.js';
import { radixSort } from 'three/addons/SortUtils.js';
//glsl
import { curl4Noise } from './glsl/curl4Noise.js'
//MAIN SCENE
let renderer, controls, stats, cameraMain, sceneDisplay;
let matCubeInstanced
//MONITOR
let sceneMonitor, camMonitor, points, PointMat;
let viewFBODepth_Mat, viewFboNormal_Mat, viewGPGPU_Pos, viewGPGPU_Vel, viewGPGPU_Extra
let loaderObjModel
//UTILS
let now, last, delta
let wView = window.innerWidth
let hView = window.innerHeight
let ratioView = window.innerWidth / window.innerHeight
let marginScissor = 2
//GPGPU
let gpuCompute
let widthTexture = 258
let velocityVariable, positionVariable, extraVariable
let positionUniforms, velocityUniforms, extraUniforms
init();
let mouseX = 0;
let mouseY = 0;
window.addEventListener('mousemove', (event) => {
mouseX = (event.clientX / wView) * 2 - 1;
mouseY = - (event.clientY / hView) * 2 + 1;
});
function init() {
loaderObjModel = new OBJLoader();
renderer = new THREE.WebGLRenderer({ alpha: true });
renderer.setPixelRatio(window.devicePixelRatio);
renderer.setSize(wView, hView);
renderer.setAnimationLoop(animate);
const canvasDom = document.getElementById("canvas")
canvasDom.appendChild(renderer.domElement);
//
stats = new Stats();
document.body.appendChild(stats.dom);
cameraMain = new THREE.PerspectiveCamera(70, wView / hView, 0.01, 400);
cameraMain.position.z = 10;
controls = new OrbitControls(cameraMain, renderer.domElement);
controls.enableDamping = true;
sceneDisplay = new THREE.Scene();
sceneDisplay.background = new THREE.Color(0x000000);
const ambienLight = new THREE.AmbientLight(0x404040, 5); // soft white light
sceneDisplay.add(ambienLight);
const directionalLight = new THREE.DirectionalLight(0xffffff, 1);
directionalLight.position.set(-2,0,1)
sceneDisplay.add(directionalLight)
const axesHelper = new THREE.AxesHelper(5);
// sceneDisplay.add(axesHelper);
initViewDisplay()
initComputeRenderer()
initInstancedMesh()
if (wView > 568) initViewMonitor()
onWindowResize();
window.addEventListener('resize', onWindowResize);
}
function initComputeRenderer() {
gpuCompute = new GPUComputationRenderer(widthTexture, widthTexture, renderer);
const dtPosition = gpuCompute.createTexture();
const dtVelocity = gpuCompute.createTexture();
const dtExtra = gpuCompute.createTexture();
fillPosTexture(dtPosition);
fillVelTexture(dtVelocity);
fillExtraTexture(dtExtra)
velocityVariable = gpuCompute.addVariable('textureVelocity', document.getElementById('frag_Vel_GPGPU').textContent, dtVelocity);
positionVariable = gpuCompute.addVariable('texturePosition', document.getElementById('frag_Pos_GPGPU').textContent, dtPosition);
extraVariable = gpuCompute.addVariable('textureExtra', document.getElementById('frag_Extra_GPGPU').textContent, dtExtra);
velocityVariable.wrapS = THREE.RepeatWrapping;
velocityVariable.wrapT = THREE.RepeatWrapping;
positionVariable.wrapS = THREE.RepeatWrapping;
positionVariable.wrapT = THREE.RepeatWrapping;
extraVariable.wrapS = THREE.RepeatWrapping;
extraVariable.wrapT = THREE.RepeatWrapping;
gpuCompute.setVariableDependencies(velocityVariable, [positionVariable, velocityVariable, extraVariable]);
gpuCompute.setVariableDependencies(positionVariable, [positionVariable, velocityVariable, extraVariable]);
gpuCompute.setVariableDependencies(extraVariable, [positionVariable, velocityVariable, extraVariable]);
positionUniforms = positionVariable.material.uniforms;
velocityUniforms = velocityVariable.material.uniforms;
extraUniforms = extraVariable.material.uniforms;
positionUniforms['time'] = { value: 0.0 };
positionUniforms['delta'] = { value: 0.0 };
velocityUniforms['time'] = { value: 0.0 };
velocityUniforms['delta'] = { value: 0.0 };
extraUniforms['time'] = { value: 0.0 };
extraUniforms['delta'] = { value: 0.0 };
//mouse
positionUniforms['mouse'] = { value: new THREE.Vector2(10000,10000) };
velocityUniforms['mouse'] = { value: new THREE.Vector2(10000,10000) };
// for fbo depth
positionUniforms['tDepthFont'] = { value: null };
positionUniforms['tNormalFont'] = { value: null };
velocityUniforms['tDepthFont'] = { value: null };
velocityUniforms['tNormalFont'] = { value: null };
positionUniforms['tDepthBack'] = { value: null };
positionUniforms['tNormalBack'] = { value: null };
velocityUniforms['tDepthBack'] = { value: null };
velocityUniforms['tNormalBack'] = { value: null };
positionUniforms['shadowMatrix0'] = { value: new THREE.Matrix4() };
positionUniforms['projInvert0'] = { value: new THREE.Matrix4() };
positionUniforms['viewInvert0'] = { value: new THREE.Matrix4() };
positionUniforms['shadowMatrix1'] = { value: new THREE.Matrix4() };
positionUniforms['projInvert1'] = { value: new THREE.Matrix4() };
positionUniforms['viewInvert1'] = { value: new THREE.Matrix4() };
velocityUniforms['shadowMatrix0'] = { value: new THREE.Matrix4() };
velocityUniforms['projInvert0'] = { value: new THREE.Matrix4() };
velocityUniforms['viewInvert0'] = { value: new THREE.Matrix4() };
velocityUniforms['shadowMatrix1'] = { value: new THREE.Matrix4() };
velocityUniforms['projInvert1'] = { value: new THREE.Matrix4() };
velocityUniforms['viewInvert1'] = { value: new THREE.Matrix4() };
const error = gpuCompute.init();
if (error !== null) {
console.error(error);
}
}
function fillPosTexture(texture) {
const arrT = texture.image.data;
for (let k = 0, kl = arrT.length; k < kl; k += 4) {
const x = Math.random() * 2 - 1;
const y = Math.random() * 2 - 1;
const z = Math.random() * 2 - 1;
let vp = new THREE.Vector3(x, y, z)
vp.multiplyScalar(0.01)
arrT[k + 0] = vp.x
arrT[k + 1] = vp.y
arrT[k + 2] = vp.z
arrT[k + 3] = 1
}
}
function fillVelTexture(texture) {
const arrT = texture.image.data;
for (let k = 0, kl = arrT.length; k < kl; k += 4) {
const x = Math.random() * 2 - 1;
const y = Math.random() * 2 - 1;
const z = Math.random() * 2 - 1;
let vv = new THREE.Vector3(x, y, z)
arrT[k + 0] = vv.x
arrT[k + 1] = vv.y
arrT[k + 2] = vv.z
arrT[k + 3] = 1
}
}
function fillExtraTexture(texture) {
const arrT = texture.image.data;
for (let k = 0, kl = arrT.length; k < kl; k += 4) {
const x = Math.random() * 2 - 1;
const y = Math.random() * 2 - 1;
const z = Math.random() * 2 - 1;
arrT[k + 0] = x
arrT[k + 1] = y
arrT[k + 2] = z
arrT[k + 3] = 1
}
}
function initInstancedMesh() {
const count = 4500;
const dummy = new THREE.Object3D();
const sizeCube = {
x: 0.05,
y: .5,
z: 0.05
}
const geometry = new THREE.BoxGeometry(sizeCube.x, sizeCube.y, sizeCube.z);
const textureCube = new THREE.TextureLoader().load('textures/colorMap.jpg');
const offsets = new Float32Array(count * 3);
for (let i = 0; i < count; i++) {
offsets[i * 3 + 0] = Math.random() * 2 - 1; // X
offsets[i * 3 + 1] = Math.random() * 2 - 1; // Y
offsets[i * 3 + 2] = Math.random() * 2 - 1; // Z
}
geometry.setAttribute('offset', new THREE.InstancedBufferAttribute(offsets, 3));
// matCubeInstanced = new THREE.ShaderMaterial({
// vertexShader: `
// attribute vec3 offset;
// uniform sampler2D tPos_gpu;
// uniform sampler2D tVel_gpu;
// uniform vec3 sizeCube;
// uniform vec2 tSize;
// varying vec3 vColor;
// varying vec4 vPos;
// varying vec2 vUv;
// vec2 rotate(vec2 v, float a) {
// float s = sin(a);
// float c = cos(a);
// mat2 m = mat2(c, s, -s, c);
// return m * v;
// }
// mat4 rotationMatrix(vec3 axis, float angle) {
// axis = normalize(axis);
// float s = sin(angle);
// float c = cos(angle);
// float oc = 1.0 - c;
// return mat4(oc * axis.x * axis.x + c, oc * axis.x * axis.y - axis.z * s, oc * axis.z * axis.x + axis.y * s, 0.0,
// oc * axis.x * axis.y + axis.z * s, oc * axis.y * axis.y + c, oc * axis.y * axis.z - axis.x * s, 0.0,
// oc * axis.z * axis.x - axis.y * s, oc * axis.y * axis.z + axis.x * s, oc * axis.z * axis.z + c, 0.0,
// 0.0, 0.0, 0.0, 1.0);
// }
// vec3 rotate(vec3 v, vec3 axis, float angle) {
// mat4 m = rotationMatrix(axis, angle);
// return (m * vec4(v, 1.0)).xyz;
// }
// #define axisX vec3(0.0, 1.0, 0.0)
// void main() {
// vec3 pos = position * max(.4,abs(offset.x));
// vec2 uvT = vec2(
// mod(float(gl_InstanceID), tSize.x) / tSize.x, // Tính chỉ số cột
// floor(float(gl_InstanceID) / tSize.x) / tSize.y // Tính chỉ số hàng
// );
// vec4 posGpu = texture2D(tPos_gpu, uvT);
// vec3 velGpu = texture2D(tVel_gpu, uvT).xyz;
// vec3 dir = normalize(velGpu);
// vec3 axis = cross(dir, axisX);
// float angle = acos(dot(dir, axisX));
// pos = rotate(pos, axis, angle);
// pos += posGpu.xyz;
// gl_Position = projectionMatrix * modelViewMatrix * vec4(pos , 1.0);
// vPos = vec4(pos,posGpu.w);
// vColor = offset;
// vUv = uvT;
// }
// `,
// fragmentShader: `
// varying vec3 vColor;
// varying vec4 vPos;
// varying vec2 vUv;
// uniform sampler2D texturePoint;
// void main() {
// vec4 colorMap = texture2D(texturePoint, vUv);
// gl_FragColor = vec4(colorMap.xyz,1.);
// }
// `,
// uniforms: {
// time: {
// value: 0
// },
// texturePoint: {
// value: textureCube
// },
// tPos_gpu: {
// value: null
// },
// tVel_gpu: {
// value: null
// },
// tSize: {
// value: new THREE.Vector2(widthTexture, widthTexture)
// },
// sizeCube: {
// value: new THREE.Vector3(sizeCube.x, sizeCube.y, sizeCube.z)
// }
// }
// });
const materialChunk = new THREE.MeshPhongMaterial({
color: 0x595959,
specular : 0x2c2a2a,
shininess: 100,
});
materialChunk.onBeforeCompile = (shader) => {
shader.uniforms.time = { value: 0 };
shader.uniforms.texturePoint = { value: textureCube };
shader.uniforms.tPos_gpu = { value: null };
shader.uniforms.tVel_gpu = { value: null };
shader.uniforms.tSize = { value: new THREE.Vector2(widthTexture, widthTexture) };
shader.uniforms.sizeCube = { value: new THREE.Vector3(sizeCube.x, sizeCube.y, sizeCube.z) };
// Sửa đổi vertex shader
shader.vertexShader = `
attribute vec3 offset;
uniform sampler2D tPos_gpu;
uniform sampler2D tVel_gpu;
uniform vec3 sizeCube;
uniform vec2 tSize;
varying vec3 vColor;
varying vec4 vPos;
varying vec2 vUv;
vec2 rotate(vec2 v, float a) {
float s = sin(a);
float c = cos(a);
mat2 m = mat2(c, s, -s, c);
return m * v;
}
mat4 rotationMatrix(vec3 axis, float angle) {
axis = normalize(axis);
float s = sin(angle);
float c = cos(angle);
float oc = 1.0 - c;
return mat4(oc * axis.x * axis.x + c, oc * axis.x * axis.y - axis.z * s, oc * axis.z * axis.x + axis.y * s, 0.0,
oc * axis.x * axis.y + axis.z * s, oc * axis.y * axis.y + c, oc * axis.y * axis.z - axis.x * s, 0.0,
oc * axis.z * axis.x - axis.y * s, oc * axis.y * axis.z + axis.x * s, oc * axis.z * axis.z + c, 0.0,
0.0, 0.0, 0.0, 1.0);
}
vec3 rotate(vec3 v, vec3 axis, float angle) {
mat4 m = rotationMatrix(axis, angle);
return (m * vec4(v, 1.0)).xyz;
}
#define axisX vec3(0.0, 1.0, 0.0)
${shader.vertexShader} // Giữ nguyên phần vertex shader gốc
`.replace(
`#include <fog_vertex>`,
`#include <fog_vertex>
vec3 pos = position * abs(offset.x);
vec2 uvT = vec2(
mod(float(gl_InstanceID), tSize.x) / tSize.x, // Tính chỉ số cột
floor(float(gl_InstanceID) / tSize.x) / tSize.y // Tính chỉ số hàng
);
vec4 posGpu = texture2D(tPos_gpu, uvT);
vec3 velGpu = texture2D(tVel_gpu, uvT).xyz;
vec3 dirC = normalize(velGpu);
vec3 axis = cross(dirC, axisX);
float angle = acos(dot(dirC, axisX));
pos = rotate(pos, axis, angle);
pos += posGpu.xyz;
gl_Position = projectionMatrix * modelViewMatrix * vec4(pos, 1.0);
vPos = vec4(pos,posGpu.w);
vColor = offset;
`);
// Sửa đổi fragment shader
shader.fragmentShader = `
varying vec3 vColor;
varying vec4 vPos;
varying vec2 vUv;
uniform sampler2D texturePoint;
${shader.fragmentShader} // Giữ nguyên phần fragment shader gốc
`.replace(
`#include <dithering_fragment>`,
`#include <dithering_fragment>
vec4 colorMap = texture2D(texturePoint, vUv);
gl_FragColor = vec4( outgoingLight * 12. + vColor / 5.,1.);
`);
console.log(shader.vertexShader)
matCubeInstanced = shader;
};
const cubeInstanced = new THREE.InstancedMesh(geometry, materialChunk, count);
for (let i = 0; i < count; i++) {
dummy.position.set(Math.random() * 2 - 1, Math.random() * 2 - 1, Math.random() * 2 - 1);
dummy.updateMatrix();
cubeInstanced.setMatrixAt(i, dummy.matrix);
}
sceneDisplay.add(cubeInstanced);
}
function initViewDisplay() {
const gridSize = widthTexture; // Số điểm theo mỗi chiều
const spacing = 1.0 / (gridSize - 1); // Khoảng cách giữa các điểm
// Tạo dữ liệu điểm cho lưới
const vertices = [];
const extra = [];
const uvs = [];
for (let x = 0; x < gridSize; x++) {
for (let y = 0; y < gridSize; y++) {
// Tính toán tọa độ UV cho điểm
const u = x * spacing;
const v = y * spacing;
let posX = u * 2.0 - 1.0;
let posY = v * 2.0 - 1.0;
let extraX = Math.random() * 2 - 1