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//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions
// are met:
// * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above copyright
// notice, this list of conditions and the following disclaimer in the
// documentation and/or other materials provided with the distribution.
// * Neither the name of NVIDIA CORPORATION nor the names of its
// contributors may be used to endorse or promote products derived
// from this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``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 THE COPYRIGHT OWNER OR
// CONTRIBUTORS 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.
//
// Copyright (c) 2018 NVIDIA Corporation. All rights reserved.
#include "Apex.h"
#include "EmitterGeomBase.h"
namespace nvidia
{
namespace emitter
{
/* Return percentage of new volume not covered by old volume */
float EmitterGeomBase::computeNewlyCoveredVolume(
const PxMat44& oldPose,
const PxMat44& newPose,
float scale,
QDSRand& rand) const
{
// estimate by sampling
const uint32_t numSamples = 100;
uint32_t numOutsideOldVolume = 0;
for (uint32_t i = 0; i < numSamples; i++)
{
if (!isInEmitter(randomPosInFullVolume(PxMat44(newPose) * scale, rand), PxMat44(oldPose) * scale))
{
numOutsideOldVolume++;
}
}
return (float) numOutsideOldVolume / numSamples;
}
// TODO make better, this is very slow when emitter moves slowly
// SJB: I'd go one further, this seems mildly retarted
PxVec3 EmitterGeomBase::randomPosInNewlyCoveredVolume(const PxMat44& pose, const PxMat44& oldPose, QDSRand& rand) const
{
PxVec3 pos;
do
{
pos = randomPosInFullVolume(pose, rand);
}
while (isInEmitter(pos, oldPose));
return pos;
}
}
} // namespace nvidia::apex
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