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Added TerrainViewer visualization

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1 parent 692dc25 commit cc58563e02da5906c67bcb4c5fd946503eee49f3 @CodeStrumpet committed Mar 26, 2012
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@@ -0,0 +1,59 @@
+/**
+ * @author alteredq / http://alteredqualia.com/
+ * @author mr.doob / http://mrdoob.com/
+ */
+
+Detector = {
+
+ canvas: !! window.CanvasRenderingContext2D,
+ webgl: ( function () { try { return !! window.WebGLRenderingContext && !! document.createElement( 'canvas' ).getContext( 'experimental-webgl' ); } catch( e ) { return false; } } )(),
+ workers: !! window.Worker,
+ fileapi: window.File && window.FileReader && window.FileList && window.Blob,
+
+ getWebGLErrorMessage: function () {
+
+ var element = document.createElement( 'div' );
+ element.id = 'webgl-error-message';
+ element.style.fontFamily = 'monospace';
+ element.style.fontSize = '13px';
+ element.style.fontWeight = 'normal';
+ element.style.textAlign = 'center';
+ element.style.background = '#fff';
+ element.style.color = '#000';
+ element.style.padding = '1.5em';
+ element.style.width = '400px';
+ element.style.margin = '5em auto 0';
+
+ if ( ! this.webgl ) {
+
+ element.innerHTML = window.WebGLRenderingContext ? [
+ 'Your graphics card does not seem to support <a href="http://khronos.org/webgl/wiki/Getting_a_WebGL_Implementation" style="color:#000">WebGL</a>.<br />',
+ 'Find out how to get it <a href="http://get.webgl.org/" style="color:#000">here</a>.'
+ ].join( '\n' ) : [
+ 'Your browser does not seem to support <a href="http://khronos.org/webgl/wiki/Getting_a_WebGL_Implementation" style="color:#000">WebGL</a>.<br/>',
+ 'Find out how to get it <a href="http://get.webgl.org/" style="color:#000">here</a>.'
+ ].join( '\n' );
+
+ }
+
+ return element;
+
+ },
+
+ addGetWebGLMessage: function ( parameters ) {
+
+ var parent, id, element;
+
+ parameters = parameters || {};
+
+ parent = parameters.parent !== undefined ? parameters.parent : document.body;
+ id = parameters.id !== undefined ? parameters.id : 'oldie';
+
+ element = Detector.getWebGLErrorMessage();
+ element.id = id;
+
+ parent.appendChild( element );
+
+ }
+
+};
@@ -0,0 +1,71 @@
+// http://mrl.nyu.edu/~perlin/noise/
+
+var ImprovedNoise = function () {
+
+ var p = [151,160,137,91,90,15,131,13,201,95,96,53,194,233,7,225,140,36,103,30,69,142,8,99,37,240,21,10,
+ 23,190,6,148,247,120,234,75,0,26,197,62,94,252,219,203,117,35,11,32,57,177,33,88,237,149,56,87,
+ 174,20,125,136,171,168,68,175,74,165,71,134,139,48,27,166,77,146,158,231,83,111,229,122,60,211,
+ 133,230,220,105,92,41,55,46,245,40,244,102,143,54,65,25,63,161,1,216,80,73,209,76,132,187,208,
+ 89,18,169,200,196,135,130,116,188,159,86,164,100,109,198,173,186,3,64,52,217,226,250,124,123,5,
+ 202,38,147,118,126,255,82,85,212,207,206,59,227,47,16,58,17,182,189,28,42,223,183,170,213,119,
+ 248,152,2,44,154,163,70,221,153,101,155,167,43,172,9,129,22,39,253,19,98,108,110,79,113,224,232,
+ 178,185,112,104,218,246,97,228,251,34,242,193,238,210,144,12,191,179,162,241,81,51,145,235,249,
+ 14,239,107,49,192,214,31,181,199,106,157,184,84,204,176,115,121,50,45,127,4,150,254,138,236,205,
+ 93,222,114,67,29,24,72,243,141,128,195,78,66,215,61,156,180];
+
+ for (var i=0; i < 256 ; i++) {
+
+ p[256+i] = p[i];
+
+ }
+
+ function fade(t) {
+
+ return t * t * t * (t * (t * 6 - 15) + 10);
+
+ }
+
+ function lerp(t, a, b) {
+
+ return a + t * (b - a);
+
+ }
+
+ function grad(hash, x, y, z) {
+
+ var h = hash & 15;
+ var u = h < 8 ? x : y, v = h < 4 ? y : h == 12 || h == 14 ? x : z;
+ return ((h&1) == 0 ? u : -u) + ((h&2) == 0 ? v : -v);
+
+ }
+
+ return {
+
+ noise: function (x, y, z) {
+
+ var floorX = ~~x, floorY = ~~y, floorZ = ~~z;
+
+ var X = floorX & 255, Y = floorY & 255, Z = floorZ & 255;
+
+ x -= floorX;
+ y -= floorY;
+ z -= floorZ;
+
+ var xMinus1 = x -1, yMinus1 = y - 1, zMinus1 = z - 1;
+
+ var u = fade(x), v = fade(y), w = fade(z);
+
+ var A = p[X]+Y, AA = p[A]+Z, AB = p[A+1]+Z, B = p[X+1]+Y, BA = p[B]+Z, BB = p[B+1]+Z;
+
+ return lerp(w, lerp(v, lerp(u, grad(p[AA], x, y, z),
+ grad(p[BA], xMinus1, y, z)),
+ lerp(u, grad(p[AB], x, yMinus1, z),
+ grad(p[BB], xMinus1, yMinus1, z))),
+ lerp(v, lerp(u, grad(p[AA+1], x, y, zMinus1),
+ grad(p[BA+1], xMinus1, y, z-1)),
+ lerp(u, grad(p[AB+1], x, yMinus1, zMinus1),
+ grad(p[BB+1], xMinus1, yMinus1, zMinus1))));
+
+ }
+ }
+}

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