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Clarify docs on qnans in aiMesh vertex data arrays.

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Complete format list, rebuild doc.

git-svn-id: https://assimp.svn.sourceforge.net/svnroot/assimp/trunk@681 67173fc5-114c-0410-ac8e-9d2fd5bffc1f
This commit is contained in:
aramis_acg
2010-04-14 21:13:58 +00:00
parent c78f40171d
commit e4285a5b38
3 changed files with 20 additions and 10 deletions
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11
include/aiMesh.h
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@@ -355,11 +355,13 @@ struct aiMesh
* but the normals for vertices that are only referenced by
* point or line primitives are undefined and set to QNaN (WARN:
* qNaN compares to inequal to *everything*, even to qNaN itself.
* Use code like this
* Using code like this to check whether a field is qnan is:
* @code
* #define IS_QNAN(f) (f != f)
* @endcode
* to check whether a field is qnan).
* still dangerous because even 1.f == 1.f could evaluate to false! (
* remember the subtleties of IEEE754 artithmetics). Use stuff like
* @c fpclassify instead.
* @note Normal vectors computed by Assimp are always unit-length.
* However, this needn't apply for normals that have been taken
* directly from the model file.
@@ -373,7 +375,8 @@ struct aiMesh
* of points and lines only may not have normal vectors. Meshes with
* mixed primitive types (i.e. lines and triangles) may have
* normals, but the normals for vertices that are only referenced by
* point or line primitives are undefined and set to QNaN.
* point or line primitives are undefined and set to qNaN. See
* the #mNormals member for a detailled discussion of qNaNs.
* @note If the mesh contains tangents, it automatically also
* contains bitangents (the bitangent is just the cross product of
* tangent and normal vectors).
@@ -385,7 +388,7 @@ struct aiMesh
* Y texture axis. The array contains normalized vectors, NULL if not
* present. The array is mNumVertices in size.
* @note If the mesh contains tangents, it automatically also contains
* bitangents.
* bitangents.
*/
C_STRUCT aiVector3D* mBitangents;