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bvh.html
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bvh.html
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<!DOCTYPE html>
<html>
<head>
<link rel="stylesheet" type="text/css" href="res/css/main.css" />
</head>
<body>
<canvas id="screen"></canvas>
</body>
<script src="https://cdn.jsdelivr.net/npm/ashes3d@0.5.0/build/ashes.main.js"></script>
<!-- <script src="build/ashes.main.js"></script> -->
<script>
let { Asset, EntityMgr, Camera, vec2, vec3, mat3, mat4, quat, Screen, OrbitControl, Filter, Shader, Material, QuadMesh, MeshRenderer, Texture, glsl } = Ashes;
let {Vignetting} = Ashes;
let {Bloom} = Ashes;
let {BVHManager, AABB} = Ashes;
// URLs:
let assetRoot = 'https://but0n.github.io/Ashes/'
// let assetRoot = ''
Material.SHADER_PATH = assetRoot + Material.SHADER_PATH;
DamagedHelmet = assetRoot + 'gltfsamples/DamagedHelmet.glb';
ashesLogo = assetRoot + 'gltfsamples/ashes3.glb';
(async () => {
let screen = new Screen('#screen');
screen.bgColor = [0.23,0.23,0.23, 1];
// Prepare textures:
// 1.Download HDR environment texture
let hdrEnv = await Asset.loadTexture(assetRoot + 'res/envmap/HDR_textures/lebombo_2k.hdr');
hdrEnv.flipY = true;
// 2.Download grid texture
let grid = await Asset.loadTexture('res/textures/grid.jpg');
// 3.Download UV checher texture
// let uvck = await Asset.loadTexture(assetRoot + 'res/textures/checker.png');
// 4.Download hdr cube texture which is required in PBR forward renderer
// (Unnecessary!)
let diffenv = await Asset.loadCubemap(assetRoot + 'res/envmap/helipad_diff/', 'hdr');
let skybox = await Asset.loadCubemap(assetRoot + 'res/envmap/helipad/', 'hdr');
// Creat a scene
let scene = EntityMgr.create('root');
// Initialize Camera and controls
let mainCamera = scene.appendChild(EntityMgr.create('camera'));
let cameraTrans = mainCamera.components.Transform;
let cam = mainCamera.addComponent(new Camera(screen.width / screen.height));
vec3.set(cameraTrans.translate, 0, 0, 15);
// Orbit control
let orbitCtl = mainCamera.addComponent(new OrbitControl(screen, mainCamera));
orbitCtl.damping = 0;
orbitCtl.speed = 1;
screen.mainCamera = cam;
// Apply current scene
document.querySelector('body').appendChild(scene);
// NOTE: Downlaod glTF models
// Apped them to current scene
let disposer = [
{
url: ashesLogo,
t: [0, -2, -4],
s: 1.,
},
{
url: DamagedHelmet,
// t: [3., -0.1, 0],
t: [0, -0.1, 0],
// r: [0, -30, 0],
s: 2,
},
].map(async ({url, r, t, s}) => {
if(!url) return () => {};
const m = await Asset.loadGLTF(url, screen, skybox, diffenv);
scene.appendChild(m);
if(t != undefined) {
for(let i = 0; i < 3; i++)
m.components.Transform.translate[i] = t[i];
}
if(s != undefined)
vec3.scale(m.components.Transform.scale, m.components.Transform.scale, s);
if(r && r.length == 3)
quat.fromEuler(m.components.Transform.quaternion, r[0], r[1], r[2]);
return () => scene.removeChild(m);
});
// return;
disposer = await Promise.all(disposer);
// Collect all meshes
meshes = EntityMgr.getComponents('Mesh', scene);
// waiting until world matrices updated
await new Promise((res, rej) => {
setTimeout(() => res(), 200);
})
// NOTE: remove gltf model
disposer.forEach(e => e());
EntityMgr.hasNewMember = true;
// NOTE: Build BVH
let bvhMgr = new BVHManager();
console.log(bvhMgr);
// const {LBVH, triangleTexture, primitives} = bvhMgr.buildBVH([ meshes[0], meshes[1], meshes[14+2], meshes[38+2], meshes[37+2], meshes[41+2], meshes[81+2]]);
const {LBVH, triangleTexture, primitives, matHandler} = bvhMgr.buildBVH(meshes);
console.log(LBVH);
// Detect platform
let commonShader = Screen.platform == 'iOS'
? new Shader(glsl.stylize.vs, glsl.stylize.fs)
: new Shader(glsl.stylize2.vs, glsl.stylize2.fs);
// Initial ray-tracer
const rtShader = new Shader(glsl.ray.vs, glsl.ray.fs, {
iResolution: `vec2(${1/screen.width},${1/screen.height})`,
Resolution: `vec2(${screen.width},${screen.height})`,
iTexel: `vec2(${1/2048})`,
});
rtShader.fragmentSource = rtShader.fragmentSource
.replace('#include <mat_params>', matHandler.params)
.replace('#include <mat_route>', matHandler.route);
let rt = new rayTracing(screen, cam, rtShader);
Material.setTexture(rt.material, 'triangleTex', triangleTexture.tex);
Material.setTexture(rt.material, 'LBVHTex', LBVH.tex);
// HDR environment texture
Material.setTexture(rt.material, 'hdrSky', hdrEnv);
// Grid texture
Material.setTexture(rt.material, 'ground', grid);
// UV checker
// Material.setTexture(rt.material, 'uvck', uvck);
matHandler.init(rt.material);
// screen.attachFilter(rt);
let cache = new Filter(screen, new Shader(
`#version 300 es
#include <macros>
in vec3 POSITION;
void main() {
gl_Position = vec4(POSITION, 1);
}
`,
`#version 300 es
#extension GL_OES_texture_float : enable
#extension GL_OES_texture_float_linear : enable
precision highp float;
#include <macros>
uniform sampler2D base;
uniform sampler2D test;
out vec4 outColor;
void main(){
outColor = texelFetch(test, ivec2(gl_FragCoord), 0);
}
`
));
screen.attachFilter(cache);
screen.attachFilter(rt);
cache.setInput(rt.output, 'test');
rt.setInput(cache.output, 'test');
let rt_final = new Filter(screen, new Shader(glsl.ray_comb.vs, glsl.ray_comb.fs, {
iResolution: `vec2(${1/screen.width},${1/screen.height})`,
Resolution: `vec2(${screen.width},${screen.height})`,
iTexel: `vec2(${1/4096})`,
}));
exp = 1;
rt_final.setInput(rt.output, 'test');
Material.setUniform(rt_final.material, 'EXPOSURE', exp);
screen.attachFilter(rt_final);
// Control
document.addEventListener('keypress', (e) => {
switch(e.key) {
case 'k':
rt.toggleMode();
break;
case ']':
exp += 0.05;
Material.setUniform(rt_final.material, 'EXPOSURE', exp*exp);
break;
case '[':
exp -= 0.05;
Material.setUniform(rt_final.material, 'EXPOSURE', exp*exp);
break;
case 'q':
--rt.aperture;
rt.updateAperture();
break;
case 'e':
++rt.aperture;
rt.updateAperture();
break;
case 'a':
rt.focalLength -= 5;
rt.updateFocalLength();
break;
case 'd':
rt.focalLength += 5;
rt.updateFocalLength();
break;
}
})
})()
class rayTracing extends Filter {
frame = 0;
timer = 0;
tar = vec3.fromValues(0, 1.2, 0);
// tar = vec3.fromValues(0, 0, 0);
cam;
fastMode = true;
mousePos = vec2.create();
aperture = 4;
focalLength = 50;
constructor(screen, cam, shader) {
super(screen, shader);
this.cameraTrans = cam.entity.components.Transform;
this.cam = cam;
this.tar = cam.lookAt;
let update = (e, focus = false) => {
if(e && focus) {
const {pageX, pageY} = e;
this.mousePos[0] = (pageX * 2 - window.innerWidth) / window.innerHeight;
this.mousePos[1] = ((window.innerHeight - pageY) * 2 - window.innerHeight) / window.innerHeight;
Material.setUniform(this.material, 'mousePos', this.mousePos);
}
this.reset();
}
screen.canvas.addEventListener('mousedown', e => {
update(e, true);
screen.canvas.addEventListener('mousemove', update)
})
screen.canvas.addEventListener('mouseup', () => {
screen.canvas.removeEventListener('mousemove', update);
})
screen.canvas.addEventListener('wheel', update);
this.createTBN();
this.reset();
this.toggleMode();
this.onRender = (dt) => {
// this.updateTBN();
document.title = `[F ${this.frame}] - Ashes3d`;
Material.setUniform(this.material, 'iFrame', this.frame);
Material.setUniform(this.material, 'iTime', this.timer);
// Material.setUniform(this.material, 'vp', this.cameraTrans.translate);
// Material.setUniform(this.material, 'TBN', this.tbn);
this.timer += dt;
this.frame += 1;
}
this.updateAperture();
this.updateFocalLength();
}
updateAperture() {
Material.setUniform(this.material, 'aperture', Math.pow(1 / Math.max(0, this.aperture) * 1.414, 2));
this.reset();
}
updateFocalLength() {
Material.setUniform(this.material, 'focalLength', this.focalLength/23);
this.reset();
}
toggleMode() {
this.fastMode = !this.fastMode;
// Material.setUniform(this.material, 'PATH_LENGTH', 12);
Material.setUniform(this.material, 'DEBUG_NORMAL', this.fastMode ? -1 : 1);
this.reset();
}
tbn;
t; // tangent
b; // bitangent
n; // normal
createTBN() {
this.tbn = mat3.create();
this.t = this.tbn.subarray(0, 3);
this.b = this.tbn.subarray(3, 6);
this.n = this.tbn.subarray(6, 9);
}
updateTBN() {
const vp = this.cameraTrans.translate;
const tar = this.tar;
vec3.sub(this.n, tar, vp);
vec3.normalize(this.n, this.n);
vec3.cross(this.t, this.n, this.cam.up);
vec3.normalize(this.t, this.t);
vec3.cross(this.b, this.t, this.n);
Material.setUniform(this.material, 'vp', this.cameraTrans.translate);
Material.setUniform(this.material, 'TBN', this.tbn);
// Material.setUniform(this.materials, 'mousePos', this.mousePos);
}
reset() {
this.frame = 0;
// this.timer = 0;
this.updateTBN();
}
}
</script>
</html>