2 * Copyright (C) 2007 Apple Inc. All rights reserved.
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
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.
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.
30 function morph(a, f) {
31 var PI2nx = Math.PI * 8/nx
33 var f30 = -(50 * sin(f*Math.PI*2))
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
44 for (var i=0; i < nx*nz*3; ++i)
47 for (var i = 0; i < loops; ++i) {
52 for (var i = 0; i < nx; i++)
53 testOutput += a[3*(i*nx+i)+1];
56 // This has to be an approximate test since ECMAscript doesn't formally specify
57 // what sin() returns. Even if it did specify something like for example what Java 7
58 // says - that sin() has to return a value within 1 ulp of exact - then we still
59 // would not be able to do an exact test here since that would allow for just enough
60 // low-bit slop to create possibly big errors due to testOutput being a sum.
62 if (("" + testOutput).indexOf(expected) != 0)
63 throw "Error: bad test output: expected leading digit to be " + expected + " but got " + testOutput;