1 | // |
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3 | // modification, are permitted provided that the following conditions |
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5 | // * Redistributions of source code must retain the above copyright |
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7 | // * Redistributions in binary form must reproduce the above copyright |
8 | // notice, this list of conditions and the following disclaimer in the |
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10 | // * Neither the name of NVIDIA CORPORATION nor the names of its |
11 | // contributors may be used to endorse or promote products derived |
12 | // from this software without specific prior written permission. |
13 | // |
14 | // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ''AS IS'' AND ANY |
15 | // EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
16 | // IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
17 | // PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR |
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22 | // OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
23 | // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
24 | // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
25 | // |
26 | // Copyright (c) 2008-2021 NVIDIA Corporation. All rights reserved. |
27 | // Copyright (c) 2004-2008 AGEIA Technologies, Inc. All rights reserved. |
28 | // Copyright (c) 2001-2004 NovodeX AG. All rights reserved. |
29 | |
30 | |
31 | #ifndef PX_PHYSICS_GEOMUTILS_NX_SIMPLETRIANGLEMESH |
32 | #define PX_PHYSICS_GEOMUTILS_NX_SIMPLETRIANGLEMESH |
33 | /** \addtogroup geomutils |
34 | @{ |
35 | */ |
36 | |
37 | #include "foundation/PxVec3.h" |
38 | #include "foundation/PxFlags.h" |
39 | #include "common/PxCoreUtilityTypes.h" |
40 | #include "common/PxPhysXCommonConfig.h" |
41 | |
42 | #if !PX_DOXYGEN |
43 | namespace physx |
44 | { |
45 | #endif |
46 | |
47 | /** |
48 | \brief Enum with flag values to be used in PxSimpleTriangleMesh::flags. |
49 | */ |
50 | struct PxMeshFlag |
51 | { |
52 | enum Enum |
53 | { |
54 | /** |
55 | \brief Specifies if the SDK should flip normals. |
56 | |
57 | The PhysX libraries assume that the face normal of a triangle with vertices [a,b,c] can be computed as: |
58 | edge1 = b-a |
59 | edge2 = c-a |
60 | face_normal = edge1 x edge2. |
61 | |
62 | Note: This is the same as a counterclockwise winding in a right handed coordinate system or |
63 | alternatively a clockwise winding order in a left handed coordinate system. |
64 | |
65 | If this does not match the winding order for your triangles, raise the below flag. |
66 | */ |
67 | eFLIPNORMALS = (1<<0), |
68 | e16_BIT_INDICES = (1<<1) //!< Denotes the use of 16-bit vertex indices |
69 | }; |
70 | }; |
71 | |
72 | /** |
73 | \brief collection of set bits defined in PxMeshFlag. |
74 | |
75 | @see PxMeshFlag |
76 | */ |
77 | typedef PxFlags<PxMeshFlag::Enum,PxU16> PxMeshFlags; |
78 | PX_FLAGS_OPERATORS(PxMeshFlag::Enum,PxU16) |
79 | |
80 | |
81 | /** |
82 | \brief A structure describing a triangle mesh. |
83 | */ |
84 | class PxSimpleTriangleMesh |
85 | { |
86 | public: |
87 | |
88 | /** |
89 | \brief Pointer to first vertex point. |
90 | */ |
91 | PxBoundedData points; |
92 | |
93 | /** |
94 | \brief Pointer to first triangle. |
95 | |
96 | Caller may add triangleStrideBytes bytes to the pointer to access the next triangle. |
97 | |
98 | These are triplets of 0 based indices: |
99 | vert0 vert1 vert2 |
100 | vert0 vert1 vert2 |
101 | vert0 vert1 vert2 |
102 | ... |
103 | |
104 | where vertex is either a 32 or 16 bit unsigned integer. There are numTriangles*3 indices. |
105 | |
106 | This is declared as a void pointer because it is actually either an PxU16 or a PxU32 pointer. |
107 | */ |
108 | PxBoundedData triangles; |
109 | |
110 | /** |
111 | \brief Flags bits, combined from values of the enum ::PxMeshFlag |
112 | */ |
113 | PxMeshFlags flags; |
114 | |
115 | /** |
116 | \brief constructor sets to default. |
117 | */ |
118 | PX_INLINE PxSimpleTriangleMesh(); |
119 | /** |
120 | \brief (re)sets the structure to the default. |
121 | */ |
122 | PX_INLINE void setToDefault(); |
123 | /** |
124 | \brief returns true if the current settings are valid |
125 | */ |
126 | PX_INLINE bool isValid() const; |
127 | }; |
128 | |
129 | |
130 | PX_INLINE PxSimpleTriangleMesh::PxSimpleTriangleMesh() |
131 | { |
132 | } |
133 | |
134 | PX_INLINE void PxSimpleTriangleMesh::setToDefault() |
135 | { |
136 | *this = PxSimpleTriangleMesh(); |
137 | } |
138 | |
139 | PX_INLINE bool PxSimpleTriangleMesh::isValid() const |
140 | { |
141 | // Check geometry |
142 | if(points.count > 0xffff && flags & PxMeshFlag::e16_BIT_INDICES) |
143 | return false; |
144 | if(!points.data) |
145 | return false; |
146 | if(points.stride < sizeof(PxVec3)) //should be at least one point's worth of data |
147 | return false; |
148 | |
149 | // Check topology |
150 | // The triangles pointer is not mandatory |
151 | if(triangles.data) |
152 | { |
153 | // Indexed mesh |
154 | PxU32 limit = (flags & PxMeshFlag::e16_BIT_INDICES) ? sizeof(PxU16)*3 : sizeof(PxU32)*3; |
155 | if(triangles.stride < limit) |
156 | return false; |
157 | } |
158 | return true; |
159 | } |
160 | |
161 | #if !PX_DOXYGEN |
162 | } // namespace physx |
163 | #endif |
164 | |
165 | /** @} */ |
166 | #endif |
167 | |