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SOP/SOP_ArrayAttrib.C
/*
* Copyright (c) 2018
* 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.
*
*----------------------------------------------------------------------------
* ArrayAttrib SOP
*/
#include <GU/GU_Detail.h>
#include <GA/GA_Handle.h>
#include <OP/OP_Operator.h>
using namespace HDK_Sample;
void
{
"hdk_arrayattrib",
"Array Attribute",
1,
1));
}
static PRM_Name sop_names[] = {
PRM_Name("attribname", "Attribute"),
PRM_Name("value", "Value"),
};
static PRM_Default sop_valueDefault(0.1);
static PRM_Range sop_valueRange(PRM_RANGE_RESTRICTED,0,PRM_RANGE_UI,1);
{
PRM_Template(PRM_STRING, 1, &sop_names[0], 0),
};
{
return new SOP_ArrayAttrib(net, name, entry);
}
: SOP_Node(net, name, entry)
{
// This indicates that this SOP manually manages its data IDs,
// so that Houdini can identify what attributes may have changed,
// e.g. to reduce work for the viewport, or other SOPs that
// check whether data IDs have changed.
// By default, (i.e. if this line weren't here), all data IDs
// would be bumped after the SOP cook, to indicate that
// everything might have changed.
// If some data IDs don't get bumped properly, the viewport
// may not update, or SOPs that check data IDs
// may not cook correctly, so be *very* careful!
mySopFlags.setManagesDataIDs(true);
}
SOP_ArrayAttrib::~SOP_ArrayAttrib()
{
}
{
fpreal t = context.getTime();
// We must lock our inputs before we try to access their geometry.
// OP_AutoLockInputs will automatically unlock our inputs when we return.
// NOTE: Don't call unlockInputs yourself when using this!
OP_AutoLockInputs inputs(this);
if (inputs.lock(context) >= UT_ERROR_ABORT)
return error();
duplicateSource(0, context);
UT_String aname;
ATTRIBNAME(aname, t);
aname,
// Allow any tuple size to match
-1, -1);
if (!attrib)
{
aname,
// Tuple size one means we group the array into
// logical groups of 1. It does *NOT* affect
// the length of the arrays, which are always
// measured in ints.
1);
}
// See if we failed to make the array.
if (!attrib)
{
buf.sprintf("Failed to create array attributes \"%s\"",
(const char *) aname);
return error();
}
// Make sure we are an array. Note tuples do not match to this,
// nor do GA_*Handle* match!
// We will match both int and float here, however.
// (For string, getAIFSharedStringArray)
const GA_AIFNumericArray *aif = attrib->getAIFNumericArray();
if (!aif)
{
buf.sprintf("Attribute \"%s\" not a numeric array!",
(const char *) aname);
return error();
}
// We keep our read/write array outside of the inner loop.
// This allows this to grow to the maximum size encountered
// and avoid reallocations.
GA_Offset ptoff;
{
// Fetch array value
aif->get(attrib, ptoff, data);
// Append our point number if the current length
// is less than the point number.
GA_Index ptidx = gdp->pointIndex(ptoff);
if (data.entries() < ptidx)
data.append(ptidx);
// Write back
aif->set(attrib, ptoff, data);
}
// Mark as modified.
attrib->bumpDataId();
return error();
}