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// Copyright 2009 Intel Corporation
// SPDX-License-Identifier: Apache-2.0
#ifdef OSPRAY_ENABLE_VOLUMES
#include "common/Intersect.ih"
#include "common/Ray.ih"
#include "common/VolumeIntervals.ih"
#include "volume/Volume.ih"
OSPRAY_BEGIN_ISPC_NAMESPACE
export void Volume_embreeBounds(const void *uniform _args)
{
const RTCBoundsFunctionArguments *uniform args =
(const RTCBoundsFunctionArguments *uniform)_args;
Volume *uniform self = (Volume * uniform) args->geometryUserPtr;
box3fa *uniform out = (box3fa * uniform) args->bounds_o;
*out = make_box3fa(self->boundingBox);
}
RTC_SYCL_INDIRECTLY_CALLABLE unmasked void Volume_intersect_kernel(
RTCIntersectFunctionNArguments *uniform args)
{
// make sure to set the mask
if (!args->valid[programIndex])
return;
Volume *uniform self = (Volume * uniform) args->geometryUserPtr;
varying Ray *uniform ray = (varying Ray * uniform) args->rayhit;
box3f *uniform box = &self->boundingBox;
const Intersections isect = intersectBox(ray->org, ray->dir, *box);
const float t_min = max(ray->t0, isect.entry.t);
const float t_max = min(ray->t, isect.exit.t);
if (t_min < t_max) {
ray->instID = args->context->instID[0];
ray->geomID = args->geomID;
ray->primID = 0;
RayQueryContextVolume *uniform ctx =
(RayQueryContextVolume * uniform) args->context;
varying VolumeIntervals *uniform vIntervals =
(varying VolumeIntervals * uniform) ctx->intervals;
#ifndef OSPRAY_TARGET_SYCL
// Grow TLS pool if needed, note that we cannot grow it on the GPU b/c no
// dymanic memory. With SYCL we just take the first hit found
uniform unsigned int numNeeded =
reduce_max(vIntervals->numVolumeIntervals) + 1;
if (numNeeded > vIntervals->numAllocated) {
vIntervals->intervals = (varying VolumeInterval * uniform) reallocTLS(
vIntervals->intervals, numNeeded * sizeof(varying VolumeInterval));
vIntervals->numAllocated = numNeeded;
}
varying VolumeInterval *varying vInterval = (varying VolumeInterval
* varying)(vIntervals->intervals + vIntervals->numVolumeIntervals);
#else
varying VolumeInterval *uniform vInterval = vIntervals->intervals;
#endif
vInterval->primID = 0;
vInterval->geomID = args->geomID;
vInterval->instID = args->context->instID[0];
vInterval->interval.lower = t_min;
vInterval->interval.upper = t_max;
vIntervals->numVolumeIntervals++;
}
}
OSPRAY_END_ISPC_NAMESPACE
#endif
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