1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
|
//
// 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.
// Copyright (c) 2004-2008 AGEIA Technologies, Inc. All rights reserved.
// Copyright (c) 2001-2004 NovodeX AG. All rights reserved.
#include "PhaseConfig.h"
#include "ApexUsingNamespace.h"
#include "PsMathUtils.h"
namespace nvidia
{
namespace cloth
{
PhaseConfig transform(const PhaseConfig&);
}
}
using namespace nvidia;
namespace
{
float safeLog2(float x)
{
float saturated = PxMax(0.0f, PxMin(x, 1.0f));
return saturated ? physx::shdfnd::log2(saturated) : -FLT_MAX_EXP;
}
}
cloth::PhaseConfig::PhaseConfig(uint16_t index)
: mPhaseIndex(index)
, mPadding(0xffff)
, mStiffness(1.0f)
, mStiffnessMultiplier(1.0f)
, mCompressionLimit(1.0f)
, mStretchLimit(1.0f)
{
}
// convert from user input to solver format
cloth::PhaseConfig cloth::transform(const PhaseConfig& config)
{
PhaseConfig result(config.mPhaseIndex);
result.mStiffness = safeLog2(1.0f - config.mStiffness);
result.mStiffnessMultiplier = safeLog2(config.mStiffnessMultiplier);
// negative for compression, positive for stretch
result.mCompressionLimit = 1.f - 1.f / config.mCompressionLimit;
result.mStretchLimit = 1.f - 1.f / config.mStretchLimit;
return result;
}
|