You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
311 lines
10 KiB
311 lines
10 KiB
<script src=lib2.js></script>
|
|
<script src="https://cdnjs.cloudflare.com/ajax/libs/ace/1.4.12/ace.js"crossorigin="anonymous"></script>
|
|
<script src="https://cdnjs.cloudflare.com/ajax/libs/ace/1.4.12/ext-language_tools.js" crossorigin="anonymous"></script>
|
|
<style>
|
|
.ace_gutter-layer {
|
|
/* original width is 48px */
|
|
width: 25px !important;
|
|
}
|
|
|
|
.ace_gutter-layer > * {
|
|
/* 48 - 32 = 16 */
|
|
margin-left: 0;
|
|
}
|
|
.ace_gutter-cell {
|
|
padding-left: 0 !important;
|
|
padding-right: 3px !important;
|
|
}
|
|
.code{
|
|
font-family: "monaco, menlo, ubuntu mono, consolas, source-code-pro" ;
|
|
}
|
|
</style>
|
|
<body bgcolor=white text=black link=black alink=blue vlink=blue>
|
|
<center>
|
|
<!!--- SUPER SAMPLING THE W/H PARAMS FOR CANVAS ARE RENDER SIZE, IN THE CSS IS ACTUAL(DISPLAY) SIZE.--->
|
|
<canvas id='canvas1' style="width: 600px; height:600px;" width=1200 height=1200></canvas>
|
|
</center>
|
|
</body>
|
|
|
|
|
|
<!!-------- VERTEX SHADER: YOU PROBABLY DON'T WANT TO CHANGE THIS RIGHT NOW -------->
|
|
|
|
<script id='my_vertex_shader' type='x-shader/x-vertex'>
|
|
attribute vec3 aPos;
|
|
varying vec3 vPos;
|
|
void main() {
|
|
gl_Position = vec4(aPos, 1.);
|
|
vPos = aPos;
|
|
}
|
|
</script>
|
|
|
|
|
|
<!!-------- FRAGMENT SHADER: THIS IS WHERE YOU WILL DO YOUR WORK -------->
|
|
<!!-------- FRAGMENT SHADER: MOVED TO ./shader.frag LOADED IN lib2.js -------->
|
|
<!--script src="shader.frag" id='my_fragment_shader' type='x-shader/x-fragment'> </script>
|
|
|
|
|
|
<!!-------- CREATE A PROPERLY DESCRIPTIVE TITLE BELOW -------->
|
|
|
|
<script id='my_title' type='text/html'>
|
|
Solar RTX
|
|
</script>
|
|
|
|
|
|
<!!-------- HERE IS WHERE YOU CAN PROVIDE A LONGER TEXT DESCRIPTION -------->
|
|
|
|
<script id='my_instructions' type='text/html'><font color=#909090>
|
|
<p style="font-size:30px; ">In this homework, I implemented Global illumination w/
|
|
Realtime Recursive Ray Tracing!
|
|
<p>
|
|
<i style="font-size:25px;">Usage: </i>
|
|
<ul>
|
|
<li>Ctrl+Alt/Option+T: Toggle Texture.</li>
|
|
<li>Ctrl+S: Download fragment shader.</li>
|
|
<li>Ctrl+Alt/Option+R: Toggle Recursive Ray Tracing.</li>
|
|
<li>Ctrl+Alt/Option+N: Reset ViewPoint.</li>
|
|
<li>Ctrl+Alt/Option+P: Toggle Pause/Resume.</li>
|
|
<li style="color:red;">Please unfocus the Editing area (click somewhere else on the page) to use hotkeys.</li>
|
|
<li>Click on canvas (WITHOUT key modifiers): Toggle Pause/Resume.</li>
|
|
<li>SHIFT+Alt/Option+MOUSE DRAG/WHEEL ZOOM: Changing Viewing point.</li>
|
|
|
|
</ul>
|
|
<i style="font-size:25px;">How it works:</i>
|
|
<ul>
|
|
<li>First, I started with what I've already done in homework 1. Which already included complete Phong shading with
|
|
Specular light and much more (spherical texture mapping, simple interactions, improved UI/shader editor).
|
|
</li>
|
|
<li> I then merged the code from hw2 and added texture to each sphere.</li>
|
|
<li> I modified the ray tracing algorithm so that when hitting an object, instead of returning color calculated from
|
|
Phong model:<br>
|
|
<ul>
|
|
<li>It recursively bounces and/or refract(NOT IMPLEMENTED YET) itself spawning new rays.</li>
|
|
<li>The color of this pixel equals to Ambient + Diffuse + ks*color[Reflected] + kt*color[Refracted].
|
|
(<a href="https://www.cs.drexel.edu/~david/Classes/Papers/p343-whitted.pdf">Turner Whitted Model</a>)</li>
|
|
<li>The tracing will stop when a ray was reflected/refracted n_ref times. </li>
|
|
<li>The color of the final light is computed via specular component from the Phong model.</li>
|
|
<li>You may increase n_ref for more iterations, but please proceed with caution, because it may halt the computer.
|
|
</li>
|
|
</ul>
|
|
<li>I added more interactions, you can now change the viewpoint by
|
|
holding shift and alt key while dragging on canvas to rotate,
|
|
or holding shift and alt while scrolling on canvas to change focal length.
|
|
This is implemented by applying a transformation matrix to the viewpoint and projection surface.
|
|
</li>
|
|
<li>Finally, I used super sampling via doubling the render dimensions of the canvas to reduce aliasing.</li>
|
|
<li>Repo on <a href="https://github.com/sunyinqi0508/graphics_hw1">Github</a>.</li>
|
|
</li>
|
|
</ul>
|
|
<p>
|
|
|
|
</script>
|
|
|
|
|
|
<!!-------- YOU PROBABLY WANT TO CHANGE ANYTHING BELOW RIGHT NOW -------->
|
|
|
|
<script>
|
|
|
|
// CREATE THE HTML DOCUMENT
|
|
let flags = 0x0;
|
|
let vs = my_vertex_shader.innerHTML;
|
|
//* LOADING FRAGMENT SHADER
|
|
var client = new XMLHttpRequest();
|
|
client.open('GET', './shader.frag');
|
|
client.onloadend = function() {
|
|
fs = (client.responseText);
|
|
//* START EVERYTHING AFTER FRAGMENT SHADER IS DOWNLOADED.
|
|
gl_start(canvas1, vs, fs);
|
|
editor.getSession().setValue(fs);
|
|
editor.session.on('change', function(delta) {
|
|
if(typeof canvas1.setShaders === "function")
|
|
{
|
|
canvas1.setShaders(vs, editor.getSession().getValue());
|
|
setUniform('1i', 'flags', flags);
|
|
}
|
|
});
|
|
}
|
|
client.send();
|
|
document.body.innerHTML = [''
|
|
,'<font size=7 color=#909090>' + my_title.innerHTML
|
|
,'<img id="rtx" style="float:right;" src="./RTXon.svg" type="image/svg+xml"'
|
|
,' alt="Turn Ray Tracing On/OFF" title="Turn Ray Tracing On/OFF" height=60px /img>'
|
|
,'<div id="fps" style="font-size:25;float:right;margin-right:18px;"></div>'
|
|
,'<TABLE cellspacing=0 cellpadding=0><TR>'
|
|
,'<td><font color=red size=5><div id=errorMessage></div></font></td>'
|
|
,'</TR><TR>'
|
|
,'<table cellspacing=0>'
|
|
,'<tr>'
|
|
,'<td valign=top>'
|
|
,'<div id="ace" style="width:800px;height:1780px;"></div>'
|
|
,'</td><td valign=top>' + document.body.innerHTML
|
|
,'<div style=\'font-size:25px\'>' + my_instructions.innerHTML + '</div>' + '</td>'
|
|
,'</tr></table>'
|
|
,'</TR></TABLE>'
|
|
].join('');
|
|
|
|
// SET UP THE EDITABLE TEXT AREA ON THE LEFT SIDE.
|
|
ace.require("ace/ext/language_tools");
|
|
var editor = ace.edit("ace", {
|
|
mode:"ace/mode/glsl",
|
|
theme:"ace/theme/crimson_editor"
|
|
});
|
|
editor.setOptions({
|
|
enableBasicAutocompletion: true,
|
|
enableSnippets: true,
|
|
enableLiveAutocompletion: true,
|
|
fontSize: 14,
|
|
fontFamily: "monaco, menlo, ubuntu mono, consolas, source-code-pro",
|
|
fixedWidthGutter: true,
|
|
showGutter: true,
|
|
showPrintMargin: false,
|
|
});
|
|
editor.setAutoScrollEditorIntoView(true);
|
|
// REPARSE THE SHADER PROGRAM AFTER EVERY KEYSTROKE.
|
|
delete editor.KeyBinding;
|
|
let lastTime = Date.now();
|
|
let animating = true;
|
|
let ctrl = false, alt = false, shift = false, fpson = true, moving = false;
|
|
let mousedx = 0, mousedy = 0, mousedz = 0;
|
|
let mouselastX, mouselastY;
|
|
let pause_resume = function(){
|
|
if(animating)
|
|
lastTime = Date.now();
|
|
else
|
|
startTime += Date.now() - lastTime;
|
|
animating = !animating;
|
|
};
|
|
canvas1.addEventListener('click',function(ev){
|
|
if(!(shift && alt))
|
|
pause_resume();
|
|
//moving = false;
|
|
});
|
|
canvas1.addEventListener('mousedown', function(e){
|
|
if(shift && alt){
|
|
moving = true
|
|
mouselastX = mouselastY = undefined;
|
|
}
|
|
else
|
|
moving = false;
|
|
});
|
|
canvas1.addEventListener('mousemove', function(e){
|
|
if(shift && alt && moving){
|
|
if(!(mouselastX==undefined || mouselastY == undefined)){
|
|
mousedx += (mouselastX - e.offsetX)/60;
|
|
mousedy += (mouselastY - e.offsetY)/60;
|
|
setUniform('4f', 'rot', Math.cos(mousedx), Math.sin(mousedx), Math.cos(mousedy), Math.sin(mousedy));
|
|
}
|
|
mouselastX = e.offsetX;
|
|
mouselastY = e.offsetY;
|
|
}
|
|
else
|
|
moving = false;
|
|
});
|
|
canvas1.addEventListener('mouseup', function(e){
|
|
// if(ctrl && alt && moving){
|
|
// }
|
|
moving = false;
|
|
});
|
|
canvas1.addEventListener('mouseout', function(e){
|
|
// if(ctrl && alt && moving){
|
|
// }
|
|
moving = false;
|
|
});
|
|
canvas1.addEventListener('wheel', function(e){
|
|
if(shift && alt){
|
|
mousedz += e.wheelDelta/600;
|
|
setUniform('1f', 'dFL', mousedz);
|
|
}
|
|
});
|
|
rtx.style.cursor="pointer";
|
|
let rtswitch = function(){
|
|
const mask = 0x2;
|
|
let rtstatus = !(flags&mask);
|
|
if (rtstatus)
|
|
rtx.src='./RTXoff.svg';
|
|
else
|
|
rtx.src='./RTXon.svg';
|
|
flags = flags&!mask | (rtstatus?mask:0);
|
|
setUniform('1i', 'flags', flags);
|
|
}
|
|
rtx.addEventListener('click', rtswitch);
|
|
var requestAnimationFrame = window.requestAnimationFrame ||
|
|
window.mozRequestAnimationFrame || window.webkitRequestAnimationFrame || window.msRequestAnimationFrame;
|
|
let fpscounter = function(time){
|
|
if (start === undefined)
|
|
start = time;
|
|
else
|
|
fps.innerHTML = Math.round(10000/(time-start))/10 + ' fps';
|
|
start = time;
|
|
if(fpson)
|
|
requestAnimationFrame(fpscounter);
|
|
else{
|
|
start = undefined;
|
|
fps.innerHTML = '';
|
|
}
|
|
};
|
|
document.addEventListener('keydown',(e)=>{
|
|
if(e.code.startsWith('Shift'))
|
|
shift = true;
|
|
if(e.code.startsWith('Control'))
|
|
ctrl = true;
|
|
if(e.code.startsWith('Alt'))
|
|
alt = true;
|
|
else if(ctrl && alt && e.code == 'KeyT'){
|
|
const mask = 0x1;
|
|
flags = flags&!mask | (!(flags&mask)?mask:0);
|
|
setUniform('1i', 'flags', flags);
|
|
}
|
|
else if (ctrl &&e.code == 'KeyS'){
|
|
let a = document.createElement('a');
|
|
a.href = "data:text/plain,"+encodeURIComponent(editor.getSession().getValue());
|
|
a.download = 'shader.frag';
|
|
a.click();
|
|
}
|
|
else if(ctrl && alt&&e.code == 'KeyR')
|
|
rtswitch();
|
|
else if(ctrl && alt&&e.code == 'KeyN')
|
|
{
|
|
flags = 0;
|
|
moving = false;
|
|
mousedx = mousedy = mousedz = 0;
|
|
setUniform('4f', 'rot', Math.cos(mousedx), Math.sin(mousedx), Math.cos(mousedy), Math.sin(mousedy));
|
|
setUniform('1f', 'dFL', mousedz);
|
|
setUniform('1i', 'flags', flags);
|
|
}
|
|
else if(ctrl && alt&&e.code == 'KeyP')
|
|
pause_resume();
|
|
else if(ctrl && alt&&e.code == 'KeyF')
|
|
if(!fpson)
|
|
{
|
|
fpson = true;
|
|
requestAnimationFrame(fpscounter);
|
|
}
|
|
else
|
|
fpson = false;
|
|
// else if(e.code =='KeyV')
|
|
// alert(' '+ mousedx+ ' ' + mousedy + ' '+mousedz)
|
|
|
|
});
|
|
|
|
document.addEventListener('keyup',(e)=>{
|
|
if(e.code.startsWith('Control'))
|
|
ctrl = false;
|
|
if(e.code.startsWith('Alt'))
|
|
alt = false;
|
|
if(e.code.startsWith('Shift'))
|
|
shift = false;
|
|
});
|
|
// SET THE CURRENT TIME IN SECONDS BEFORE RENDERING EACH FRAME.
|
|
|
|
let startTime = Date.now();
|
|
let lastFrameTime = 0;
|
|
function animate(gl) {
|
|
if(animating)
|
|
setUniform('1f', 'uTime', (Date.now() - startTime) / 1000);
|
|
else
|
|
setUniform('1f', 'uTime', (lastTime - startTime) / 1000);
|
|
}
|
|
let start;
|
|
requestAnimationFrame(fpscounter);
|
|
</script>
|
|
|