samples/SOP/SOP_CPPWave.C

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/*
 * Copyright (c) 2005
 *      Side Effects Software Inc.  All rights reserved.
 *
 * Redistribution and use of Houdini Development Kit samples 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. The name of Side Effects Software may not be used to endorse or
 *    promote products derived from this software without specific prior
 *    written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY SIDE EFFECTS SOFTWARE `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 SIDE EFFECTS SOFTWARE 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.
 *
 *----------------------------------------------------------------------------
 * C++ version of the wave SOP
 */

#include <UT/UT_DSOVersion.h>
#include <SYS/SYS_Math.h>
#include <GU/GU_Detail.h>
#include <GEO/GEO_AttributeHandle.h>
#include <PRM/PRM_Include.h>
#include <OP/OP_Director.h>
#include <OP/OP_Operator.h>
#include <OP/OP_OperatorTable.h>
#include "SOP_CPPWave.h"

using namespace HDK_Sample;

void
newSopOperator(OP_OperatorTable *table)
{
     table->addOperator(new OP_Operator("cpp_wave",
                                        "CPP Wave ",
                                         SOP_CPPWave::myConstructor,
                                         SOP_CPPWave::myTemplateList,
                                         1,
                                         1,
                                         0));
}

PRM_Template
SOP_CPPWave::myTemplateList[] = {
    PRM_Template(),
};


OP_Node *
SOP_CPPWave::myConstructor(OP_Network *net, const char *name, OP_Operator *op)
{
    return new SOP_CPPWave(net, name, op);
}

SOP_CPPWave::SOP_CPPWave(OP_Network *net, const char *name, OP_Operator *op)
        : SOP_Node(net, name, op)
{
}

SOP_CPPWave::~SOP_CPPWave()
{
}

OP_ERROR
SOP_CPPWave::cookMySop(OP_Context &context)
{
    double               frame;
    int                  i, npts;

    // Before we do anything, we must lock our inputs.  Before returning,
    //  we have to make sure that the inputs get unlocked.
    if (lockInputs(context) >= UT_ERROR_ABORT)
        return error();

    // Duplicate input geometry
    duplicateSource(0, context);

    // Flag the SOP as being time dependent (i.e. cook on time changes)
    flags().timeDep = 1;

    frame = OPgetDirector()->getChannelManager()->getSample(context.getTime());
    frame *= 0.03;
    npts = gdp->points().entries();

    GEO_AttributeHandle  Phandle;
    UT_Vector4           Pvalue;
    Phandle = gdp->getAttribute(GEO_POINT_DICT, "P");
    for (i = 0; i < npts; i++)
    {
        Phandle.setElement(gdp->points()(i));
        Pvalue = Phandle.getV4();
        Pvalue.y() = sin(Pvalue.x()*.2 + Pvalue.z()*.3 + frame);
        Phandle.setV4(Pvalue);
    }

    unlockInputs();
    return error();
}

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