mirror_js/WebGL-Fluid-Simulation
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update

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This commit is contained in:
Pavel Dobryakov
2017-08-27 18:44:58 +03:00
parent cb6e44f73f
commit ab4ea59816
4 changed files with 100 additions and 17 deletions
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62
script.js
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@@ -11,6 +11,7 @@ if (!isWebGL2) {
gl = canvas.getContext('webgl', params) || canvas.getContext('experimental-webgl', params);
}
gl.clearColor(0.0, 0.0, 0.0, 1.0);
gl.enable(gl.BLEND);
const halfFloat = gl.getExtension('OES_texture_half_float');
let support_linear_float = gl.getExtension('OES_texture_half_float_linear');
@@ -23,20 +24,34 @@ let config = {
TEXTURE_DOWNSAMPLE: 1,
DENSITY_DISSIPATION: 0.98,
VELOCITY_DISSIPATION: 0.99,
SPLAT_RADIUS: 0.005,
CURL: 30,
PRESSURE_CONCENTRATION: 0.8,
PRESSURE_ITERATIONS: 25,
CLEAR_PRESSURE: false
CURL: 30,
SPLAT_RADIUS: 0.005
}
var gui = new dat.GUI();
gui.add(config, 'TEXTURE_DOWNSAMPLE', { Full: 0, Half: 1, Quarter: 2 }).name('Resolution').onFinishChange(initFramebuffers);
gui.add(config, 'DENSITY_DISSIPATION', 0.9, 1.0).name('Density dissipation');
gui.add(config, 'VELOCITY_DISSIPATION', 0.9, 1.0).name('Velocity dissipation');
gui.add(config, 'SPLAT_RADIUS', 0.001, 0.01).name('Splat radius');
gui.add(config, 'CURL', 0, 50).name('Vorticity').step(1);
gui.add(config, 'PRESSURE_ITERATIONS', 1, 60).name('Iterations');
gui.add(config, 'CLEAR_PRESSURE').name('Clear pressure');
var gui = new dat.GUI({ width: 270 });
gui.add(config, 'TEXTURE_DOWNSAMPLE', { Full: 0, Half: 1, Quarter: 2 }).name('resolution').onFinishChange(initFramebuffers);
gui.add(config, 'DENSITY_DISSIPATION', 0.9, 1.0).name('density diffusion');
gui.add(config, 'VELOCITY_DISSIPATION', 0.9, 1.0).name('velocity diffusion');
gui.add(config, 'PRESSURE_CONCENTRATION', 0.0, 1.0).name('jelly');
gui.add(config, 'PRESSURE_ITERATIONS', 1, 60).name('iterations');
gui.add(config, 'CURL', 0, 50).name('vorticity').step(1);
gui.add(config, 'SPLAT_RADIUS', 0.0001, 0.01).name('splat radius');
let github = gui.add({ fun : function () { window.open('https://github.com/PavelDoGreat/WebGL-Fluid-Simulation'); } }, 'fun').name('Github');
github.__li.className = 'cr function bigFont';
github.__li.style.borderLeft = '3px solid #8C8C8C';
let githubIcon = document.createElement('span');
github.domElement.parentElement.appendChild(githubIcon);
githubIcon.className = 'icon github';
let twitter = gui.add({ fun : function () { window.open('https://twitter.com/PavelDoGreat'); } }, 'fun').name('Twitter');
twitter.__li.className = 'cr function bigFont';
twitter.__li.style.borderLeft = '3px solid #8C8C8C';
let twitterIcon = document.createElement('span');
twitter.domElement.parentElement.appendChild(twitterIcon);
twitterIcon.className = 'icon twitter';
class GLProgram {
constructor (vertexShader, fragmentShader) {
@@ -95,6 +110,19 @@ const baseVertexShader = compileShader(gl.VERTEX_SHADER, `
}
`);
const clearShader = compileShader(gl.FRAGMENT_SHADER, `
precision highp float;
precision mediump sampler2D;
varying vec2 vUv;
uniform sampler2D uTexture;
uniform float value;
void main () {
gl_FragColor = value * texture2D(uTexture, vUv);
}
`);
const displayShader = compileShader(gl.FRAGMENT_SHADER, `
precision highp float;
precision mediump sampler2D;
@@ -397,6 +425,7 @@ function initFramebuffers () {
initFramebuffers();
const clearProgram = new GLProgram(baseVertexShader, clearShader);
const displayProgram = new GLProgram(baseVertexShader, displayShader);
const splatProgram = new GLProgram(baseVertexShader, splatShader);
const advectionProgram = new GLProgram(baseVertexShader, support_linear_float ? advectionShader : advectionManualFilteringShader);
@@ -482,9 +511,12 @@ function Update () {
gl.uniform1i(divergenceProgram.uniforms.uVelocity, velocity.first[2]);
blit(divergence[1]);
if (config.CLEAR_PRESSURE) {
clear(pressure.first[1]);
}
clearProgram.bind();
gl.uniform1i(clearProgram.uniforms.uTexture, pressure.first[2]);
gl.uniform1f(clearProgram.uniforms.value, config.PRESSURE_CONCENTRATION);
blit(pressure.second[1]);
pressure.swap();
pressureProgram.bind();
gl.uniform2f(pressureProgram.uniforms.texelSize, 1.0 / textureWidth, 1.0 / textureHeight);
gl.uniform1i(pressureProgram.uniforms.uDivergence, divergence[2]);
@@ -544,7 +576,7 @@ canvas.addEventListener('mousemove', (e) => {
canvas.addEventListener('touchmove', (e) => {
e.preventDefault();
const touches = e.targetTouches;
for (let i = 0; i < e.touches.length; i++) {
for (let i = 0; i < touches.length; i++) {
let pointer = pointers[i];
pointer.moved = pointer.down;
pointer.dx = (touches[i].pageX - pointer.x) * 10.0;