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packedsphere/GT_GEOPackedSphere.C
/*
* Copyright (c) 2020
* 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.
*
*----------------------------------------------------------------------------
*/
#include "GT_GEOPackedSphere.h"
// Enable this to cause all the spheres to be instanced in the viewport.
// #define USE_INSTANCING
using namespace HDK_Sample;
namespace
{
class PackedCollect : public GT_GEOPrimCollectData
{
public:
PackedCollect(
const GT_GEODetailListHandle &geometry,
const GT_RefineParms *parms)
, myBoxes(geometry, true)
, myUseLOD(GT_RefineParms::getPackedViewportLOD(parms))
{
}
GEO_ViewportLOD lod(const GU_PrimPacked *pack) const
{
if (myUseLOD)
{
return pack->viewportLOD();
}
}
GT_GEOOffsetList myPrimOffsets;
bool myUseLOD;
};
}
void
GT_GEOPackedSphere::registerPrimitive(const GA_PrimitiveTypeId &id)
{
new GT_GEOPackedSphere(id);
}
GT_GEOPackedSphere::GT_GEOPackedSphere(const GA_PrimitiveTypeId &id)
{
bind(id);
}
GT_GEOPackedSphere::~GT_GEOPackedSphere()
{
}
GT_GEOPackedSphere::beginCollecting(const GT_GEODetailListHandle &g,
const GT_RefineParms *parms) const
{
return new PackedCollect(g, parms);
}
GT_GEOPackedSphere::collect(const GT_GEODetailListHandle &g,
const GEO_Primitive *const* prim, int nseg,
{
PackedCollect *c = data->asPointer<PackedCollect>();
const GU_PrimPacked *packed = UTverify_cast<const GU_PrimPacked *>(prim[0]);
GEO_ViewportLOD lod = c->lod(packed);
switch (lod)
{
{
packed->getUntransformedBounds(box);
packed->getFullTransform4(m4d);
c->myBoxes.appendCentroid(box, m4d,
packed->getMapOffset(),
packed->getVertexOffset(0),
packed->getPointOffset(0));
else
c->myBoxes.appendBox(box, m4d,
packed->getMapOffset(),
packed->getVertexOffset(0),
packed->getPointOffset(0));
}
default:
break;
}
// Full or point cloud LOD
#ifdef USE_INSTANCING
// append prim offset for instancing in endCollecting()
c->myPrimOffsets.append(packed->getMapOffset());
#else
// Single prim per sphere.
offsets.append(packed->getMapOffset());
return makeInstance(g, offsets);
#endif
}
GT_GEOPackedSphere::endCollecting(const GT_GEODetailListHandle &g,
GT_GEOPrimCollectData *data) const
{
PackedCollect *c = data->asPointer<PackedCollect>();
#ifdef USE_INSTANCING
// Both the spheres and bboxes are instanced.
if(c->myPrimOffsets.entries() > 0)
ph = makeInstance(g, c->myPrimOffsets);
if(c->myBoxes.getPrimitive())
{
if(ph)
{
auto collect = new GT_PrimCollect();
collect->appendPrimitive(ph);
collect->appendPrimitive(c->myBoxes.getPrimitive());
ph = collect;
}
else
ph = c->myBoxes.getPrimitive();
}
return ph;
#else
// only boxes are instanced.
return c->myBoxes.getPrimitive();
#endif
}
GT_GEOPackedSphere::makeInstance(const GT_GEODetailListHandle &geometry,
const GT_GEOOffsetList &offsets) const
{
GU_ConstDetailHandle gdh = geometry->getGeometry(0);
UT_Matrix4DArray transforms;
for(int i=0; i<offsets.entries(); i++)
{
const GU_PrimPacked *packed =
UTverify_cast<const GU_PrimPacked *>(gdl->getPrimitive(offsets(i)));
if(!geo)
geo = new GT_GEOPrimPacked(gdh, packed);
transforms.append();
packed->getFullTransform4(transforms.last());
verts.append(packed->getVertexOffset(0));
}
th->setTransforms(transforms);
GT_AttributeListHandle uniform, detail;
uniform = geometry->getPrimitiveVertexAttributes(
filter,offsets, verts,
detail = geometry->getDetailAttributes(filter, true);
return new GT_PrimInstance(geo, th, offsets, uniform, detail);
}