/*
* Copyright (C) 2007 Apple Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
var loops = 15
var nx = 120
var nz = 120
function morph(a, f) {
var PI2nx = Math.PI * 8/nx
var sin = Math.sin
var f30 = -(50 * sin(f*Math.PI*2))
for (var i = 0; i < nz; ++i) {
for (var j = 0; j < nx; ++j) {
a[3*(i*nx+j)+1] = sin((j-1) * PI2nx ) * -f30
}
}
}
var a = Array()
for (var i=0; i < nx*nz*3; ++i)
a[i] = 0
for (var i = 0; i < loops; ++i) {
morph(a, i/loops)
}
testOutput = 0;
for (var i = 0; i < nx; i++)
testOutput += a[3*(i*nx+i)+1];
a = null;
// This has to be an approximate test since ECMAscript doesn't formally specify
// what sin() returns. Even if it did specify something like for example what Java 7
// says - that sin() has to return a value within 1 ulp of exact - then we still
// would not be able to do an exact test here since that would allow for just enough
// low-bit slop to create possibly big errors due to testOutput being a sum.
var epsilon = 1e-13;
if (Math.abs(testOutput) >= epsilon)
throw "Error: bad test output: expected magnitude below " + epsilon + " but got " + testOutput;