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-rw-r--r--demos/raytrace.html64
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diff --git a/demos/raytrace.html b/demos/raytrace.html
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-<html>
-<head>
- <title>
- Emscripten: Raytracing
- </title>
- <script src="raytrace.js"></script>
- <script type="text/javascript">
- // print function which the runtime will call
- function print(text) {
- document.getElementById('output').innerHTML = text;
- }
-
- var drawingNow = false;
- var calcedDepth = -1;
- // Do everything - initialize SDL, set up canvas, render
- function render(size, depth) {
- var startTime = Date.now();
-
- if (drawingNow) return;
- drawingNow = true;
- if (calcedDepth != depth) {
- print('<b>Generating scene data, please wait...</b>');
- }
- setTimeout(function() {
- if (calcedDepth != depth) {
- run([depth.toString()]);
- calcedDepth = depth;
- }
- _SDL_Init(size);
- var canvas = document.getElementById('canvas');
- canvas.width = canvas.height = size;
- IHEAP[_screen] = _SDL_SetVideoMode(canvas.width, canvas.height, 32, 0, canvas);
- var y = canvas.height-1;
- function drawLine() {
- print("Raytracing line: <b>" + (canvas.height-y) + "/" + canvas.height + '</b>');
- __ZL10trace_lineiii(canvas.width, canvas.width, y);
- y--;
- if (y >= 0) {
- setTimeout(arguments.callee, 1);
- } else {
- print('Finished in ' + (Date.now() - startTime)/1000 + ' seconds.');
- drawingNow = false;
- }
- }
- drawLine();
- });
- }
- </script>
-</head>
-<body>
- <canvas id='canvas' width=1 height=1></canvas>
- <hr>
- <form onsubmit="setTimeout(function() { render(parseInt(size.value), parseInt(depth.value)) }); return false">
- Rendered width/height (pixels): <input type="text" name="size" value="128">(use less for slower machines)<br>
- Scene recursion (child spheres/sphere): <input type="text" name="depth" value="5">(use less for slower machines; careful with values > 6!)<br>
- <input type="submit" value="Go!">
- </form>
- <div id="output" style="font-family: Courier New,Courier,monospace;"></div>
- <hr>
- Simple raytracing demo. The <a href="http://ompf.org/ray/sphereflake/">original C++ source</a> was
- automatically converted to JavaScript using <a href="http://emscripten.org">Emscripten</a>.
-</body>
-</html>
-