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