HDK: samples/standalone/geoisosurface.C Source File

00001 /*
00002  * Copyright (c) 2012
00003  *      Side Effects Software Inc.  All rights reserved.
00004  *
00005  * Redistribution and use of Houdini Development Kit samples in source and
00006  * binary forms, with or without modification, are permitted provided that the
00007  * following conditions are met:
00008  * 1. Redistributions of source code must retain the above copyright notice,
00009  *    this list of conditions and the following disclaimer.
00010  * 2. The name of Side Effects Software may not be used to endorse or
00011  *    promote products derived from this software without specific prior
00012  *    written permission.
00013  *
00014  * THIS SOFTWARE IS PROVIDED BY SIDE EFFECTS SOFTWARE `AS IS' AND ANY EXPRESS
00015  * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
00016  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN
00017  * NO EVENT SHALL SIDE EFFECTS SOFTWARE BE LIABLE FOR ANY DIRECT, INDIRECT,
00018  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
00019  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA,
00020  * OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
00021  * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
00022  * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
00023  * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
00024  *
00025  *----------------------------------------------------------------------------
00026  */
00027 
00028 #include <GU/GU_Detail.h>
00029 
00030 namespace HDK_Sample {
00031 
00032 static float
00033 densityFunction(const UT_Vector3 &P)
00034 {
00035     // Return the signed distance to the unit sphere
00036     return 1 - P.length();
00037 }
00038 
00039 }
00040 
00041 int
00042 main(int argc, char *argv[])
00043 {
00044     GU_Detail           gdp;
00045     UT_BoundingBox      bounds;
00046 
00047     // Evaluate the iso-surface inside this bounding box
00048     bounds.setBounds(-1, -1, -1, 1, 1, 1);
00049 
00050     // Create an iso-surface
00051     gdp.polyIsoSurface(HDK_Sample::densityFunction, bounds, 20, 20, 20);
00052 
00053     // Save to sphere.bgeo
00054     gdp.save("sphere.bgeo", true, NULL);
00055 
00056     return 0;
00057 }