check-3d-morph.js (2039B)
1 /* 2 * Copyright (C) 2007 Apple Inc. All rights reserved. 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 1. Redistributions of source code must retain the above copyright 8 * notice, this list of conditions and the following disclaimer. 9 * 2. Redistributions in binary form must reproduce the above copyright 10 * notice, this list of conditions and the following disclaimer in the 11 * documentation and/or other materials provided with the distribution. 12 * 13 * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY 14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR 17 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 18 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 20 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY 21 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 24 */ 25 26 var loops = 15 27 var nx = 120 28 var nz = 120 29 30 function morph(a, f) { 31 var PI2nx = Math.PI * 8/nx 32 var sin = Math.sin 33 var f30 = -(50 * sin(f*Math.PI*2)) 34 35 for (var i = 0; i < nz; ++i) { 36 for (var j = 0; j < nx; ++j) { 37 a[3*(i*nx+j)+1] = sin((j-1) * PI2nx ) * -f30 38 } 39 } 40 } 41 42 43 var a = Array() 44 for (var i=0; i < nx*nz*3; ++i) 45 a[i] = 0 46 47 for (var i = 0; i < loops; ++i) { 48 morph(a, i/loops) 49 } 50 51 testOutput = 0; 52 for (var i = 0; i < nx; i++) 53 testOutput += a[3*(i*nx+i)+1]; 54 a = null; 55 56 /* not based on any mathematical error calculation.*/ 57 acceptableDelta = 4e-15 58 59 assertEq((testOutput - 6.394884621840902e-14) < acceptableDelta, true);