163 lines
4.4 KiB
C++
163 lines
4.4 KiB
C++
//
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions
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// are met:
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// * Redistributions of source code must retain the above copyright
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// notice, this list of conditions and the following disclaimer.
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// * Redistributions in binary form must reproduce the above copyright
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// notice, this list of conditions and the following disclaimer in the
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// documentation and/or other materials provided with the distribution.
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// * Neither the name of NVIDIA CORPORATION nor the names of its
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// contributors may be used to endorse or promote products derived
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// from this software without specific prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY
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// EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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// PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
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// CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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// EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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// PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
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// OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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//
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// Copyright (c) 2008-2019 NVIDIA Corporation. All rights reserved.
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// Copyright (c) 2004-2008 AGEIA Technologies, Inc. All rights reserved.
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// Copyright (c) 2001-2004 NovodeX AG. All rights reserved.
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#ifndef PX_COLLISION_NXHEIGHTFIELDFLAG
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#define PX_COLLISION_NXHEIGHTFIELDFLAG
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/** \addtogroup geomutils
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@{
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*/
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#include "foundation/PxFlags.h"
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#if !PX_DOXYGEN
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namespace physx
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{
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#endif
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/**
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\brief Describes the format of height field samples.
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@see PxHeightFieldDesc.format PxHeightFieldDesc.samples
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*/
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struct PxHeightFieldFormat
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{
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enum Enum
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{
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/**
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\brief Height field height data is 16 bit signed integers, followed by triangle materials.
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Each sample is 32 bits wide arranged as follows:
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\image html heightFieldFormat_S16_TM.png
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1) First there is a 16 bit height value.
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2) Next, two one byte material indices, with the high bit of each byte reserved for special use.
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(so the material index is only 7 bits).
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The high bit of material0 is the tess-flag.
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The high bit of material1 is reserved for future use.
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There are zero or more unused bytes before the next sample depending on PxHeightFieldDesc.sampleStride,
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where the application may eventually keep its own data.
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This is the only format supported at the moment.
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@see PxHeightFieldDesc.format PxHeightFieldDesc.samples
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*/
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eS16_TM = (1 << 0)
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};
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};
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/**
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\brief Determines the tessellation of height field cells.
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@see PxHeightFieldDesc.format PxHeightFieldDesc.samples
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*/
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struct PxHeightFieldTessFlag
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{
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enum Enum
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{
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/**
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\brief This flag determines which way each quad cell is subdivided.
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The flag lowered indicates subdivision like this: (the 0th vertex is referenced by only one triangle)
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\image html heightfieldTriMat2.PNG
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<pre>
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+--+--+--+---> column
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| /| /| /|
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|/ |/ |/ |
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+--+--+--+
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| /| /| /|
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|/ |/ |/ |
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+--+--+--+
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V row
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</pre>
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The flag raised indicates subdivision like this: (the 0th vertex is shared by two triangles)
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\image html heightfieldTriMat1.PNG
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<pre>
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+--+--+--+---> column
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|\ |\ |\ |
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| \| \| \|
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+--+--+--+
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|\ |\ |\ |
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| \| \| \|
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+--+--+--+
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V row
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</pre>
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@see PxHeightFieldDesc.format PxHeightFieldDesc.samples
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*/
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e0TH_VERTEX_SHARED = (1 << 0)
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};
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};
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/**
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\brief Enum with flag values to be used in PxHeightFieldDesc.flags.
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*/
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struct PxHeightFieldFlag
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{
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enum Enum
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{
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/**
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\brief Disable collisions with height field with boundary edges.
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Raise this flag if several terrain patches are going to be placed adjacent to each other,
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to avoid a bump when sliding across.
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This flag is ignored in contact generation with sphere and capsule shapes.
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@see PxHeightFieldDesc.flags
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*/
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eNO_BOUNDARY_EDGES = (1 << 0)
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};
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};
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/**
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\brief collection of set bits defined in PxHeightFieldFlag.
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@see PxHeightFieldFlag
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*/
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typedef PxFlags<PxHeightFieldFlag::Enum,PxU16> PxHeightFieldFlags;
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PX_FLAGS_OPERATORS(PxHeightFieldFlag::Enum,PxU16)
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#if !PX_DOXYGEN
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} // namespace physx
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#endif
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/** @} */
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#endif
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