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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 |
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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_COLLISION_NXTRIANGLEMESHDESC |
32 | #define PX_COLLISION_NXTRIANGLEMESHDESC |
33 | /** \addtogroup cooking |
34 | @{ |
35 | */ |
36 | |
37 | #include "PxPhysXConfig.h" |
38 | #include "geometry/PxSimpleTriangleMesh.h" |
39 | |
40 | #if !PX_DOXYGEN |
41 | namespace physx |
42 | { |
43 | #endif |
44 | |
45 | /** |
46 | \brief Descriptor class for #PxTriangleMesh. |
47 | |
48 | Note that this class is derived from PxSimpleTriangleMesh which contains the members that describe the basic mesh. |
49 | The mesh data is *copied* when an PxTriangleMesh object is created from this descriptor. After the call the |
50 | user may discard the triangle data. |
51 | |
52 | @see PxTriangleMesh PxTriangleMeshGeometry PxShape |
53 | */ |
54 | class PxTriangleMeshDesc : public PxSimpleTriangleMesh |
55 | { |
56 | public: |
57 | |
58 | /** |
59 | Optional pointer to first material index, or NULL. There are PxSimpleTriangleMesh::numTriangles indices in total. |
60 | Caller may add materialIndexStride bytes to the pointer to access the next triangle. |
61 | |
62 | When a triangle mesh collides with another object, a material is required at the collision point. |
63 | If materialIndices is NULL, then the material of the PxShape instance is used. |
64 | Otherwise, if the point of contact is on a triangle with index i, then the material index is determined as: |
65 | PxMaterialTableIndex index = *(PxMaterialTableIndex *)(((PxU8*)materialIndices) + materialIndexStride * i); |
66 | |
67 | If the contact point falls on a vertex or an edge, a triangle adjacent to the vertex or edge is selected, and its index |
68 | used to look up a material. The selection is arbitrary but consistent over time. |
69 | |
70 | <b>Default:</b> NULL |
71 | |
72 | @see materialIndexStride |
73 | */ |
74 | PxTypedStridedData<PxMaterialTableIndex> materialIndices; |
75 | |
76 | /** |
77 | \brief Constructor sets to default. |
78 | */ |
79 | PX_INLINE PxTriangleMeshDesc(); |
80 | |
81 | /** |
82 | \brief (re)sets the structure to the default. |
83 | */ |
84 | PX_INLINE void setToDefault(); |
85 | |
86 | /** |
87 | \brief Returns true if the descriptor is valid. |
88 | \return true if the current settings are valid |
89 | */ |
90 | PX_INLINE bool isValid() const; |
91 | }; |
92 | |
93 | PX_INLINE PxTriangleMeshDesc::PxTriangleMeshDesc() //constructor sets to default |
94 | { |
95 | PxSimpleTriangleMesh::setToDefault(); |
96 | } |
97 | |
98 | PX_INLINE void PxTriangleMeshDesc::setToDefault() |
99 | { |
100 | *this = PxTriangleMeshDesc(); |
101 | } |
102 | |
103 | PX_INLINE bool PxTriangleMeshDesc::isValid() const |
104 | { |
105 | if(points.count < 3) //at least 1 trig's worth of points |
106 | return false; |
107 | if ((!triangles.data) && (points.count%3)) // Non-indexed mesh => we must ensure the geometry defines an implicit number of triangles // i.e. numVertices can't be divided by 3 |
108 | return false; |
109 | //add more validity checks here |
110 | if (materialIndices.data && materialIndices.stride < sizeof(PxMaterialTableIndex)) |
111 | return false; |
112 | return PxSimpleTriangleMesh::isValid(); |
113 | } |
114 | |
115 | #if !PX_DOXYGEN |
116 | } // namespace physx |
117 | #endif |
118 | |
119 | /** @} */ |
120 | #endif |
121 | |