HDK
 All Classes Namespaces Files Functions Variables Typedefs Enumerations Enumerator Friends Macros Groups Pages
SOP/SOP_DetailAttrib.C
/*
* Copyright (c) 2024
* 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.
*
*----------------------------------------------------------------------------
* DetailAttrib SOP
*/
#include <GU/GU_Detail.h>
#include <GA/GA_Handle.h>
#include <OP/OP_Operator.h>
using namespace HDK_Sample;
void
{
"hdk_detailattrib",
"DetailAttrib",
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),
PRM_Template(PRM_FLT_J, 1, &sop_names[1], &sop_valueDefault, 0,
&sop_valueRange),
};
{
return new SOP_DetailAttrib(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_DetailAttrib::~SOP_DetailAttrib()
{
}
{
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);
// Try with a float
// Not present, so create the detail attribute:
if (!attrib.isValid())
if (attrib.isValid())
{
// Store the value in the detail attribute
// NOTE: The detail is *always* at GA_Offset(0)
attrib.set(GA_Offset(0), VALUE(t));
attrib.bumpDataId();
}
return error();
}