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;