1/*
2Open Asset Import Library (assimp)
3----------------------------------------------------------------------
4
5Copyright (c) 2006-2017, assimp team
6
7All rights reserved.
8
9Redistribution and use of this software in source and binary forms,
10with or without modification, are permitted provided that the
11following conditions are met:
12
13* Redistributions of source code must retain the above
14 copyright notice, this list of conditions and the
15 following disclaimer.
16
17* Redistributions in binary form must reproduce the above
18 copyright notice, this list of conditions and the
19 following disclaimer in the documentation and/or other
20 materials provided with the distribution.
21
22* Neither the name of the assimp team, nor the names of its
23 contributors may be used to endorse or promote products
24 derived from this software without specific prior
25 written permission of the assimp team.
26
27THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
28"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
29LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
30A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
31OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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33LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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38
39----------------------------------------------------------------------
40*/
41
42
43/** @file Defines a post processing step to calculate tangents and
44 bitangents on all imported meshes.*/
45#ifndef AI_CALCTANGENTSPROCESS_H_INC
46#define AI_CALCTANGENTSPROCESS_H_INC
47
48#include "BaseProcess.h"
49
50struct aiMesh;
51
52namespace Assimp
53{
54
55// ---------------------------------------------------------------------------
56/** The CalcTangentsProcess calculates the tangent and bitangent for any vertex
57 * of all meshes. It is expected to be run before the JoinVerticesProcess runs
58 * because the joining of vertices also considers tangents and bitangents for
59 * uniqueness.
60 */
61class ASSIMP_API_WINONLY CalcTangentsProcess : public BaseProcess
62{
63public:
64
65 CalcTangentsProcess();
66 ~CalcTangentsProcess();
67
68public:
69 // -------------------------------------------------------------------
70 /** Returns whether the processing step is present in the given flag.
71 * @param pFlags The processing flags the importer was called with.
72 * A bitwise combination of #aiPostProcessSteps.
73 * @return true if the process is present in this flag fields,
74 * false if not.
75 */
76 bool IsActive( unsigned int pFlags) const;
77
78 // -------------------------------------------------------------------
79 /** Called prior to ExecuteOnScene().
80 * The function is a request to the process to update its configuration
81 * basing on the Importer's configuration property list.
82 */
83 void SetupProperties(const Importer* pImp);
84
85
86 // setter for configMaxAngle
87 inline void SetMaxSmoothAngle(float f)
88 {
89 configMaxAngle =f;
90 }
91
92protected:
93
94 // -------------------------------------------------------------------
95 /** Calculates tangents and bitangents for a specific mesh.
96 * @param pMesh The mesh to process.
97 * @param meshIndex Index of the mesh
98 */
99 bool ProcessMesh( aiMesh* pMesh, unsigned int meshIndex);
100
101 // -------------------------------------------------------------------
102 /** Executes the post processing step on the given imported data.
103 * @param pScene The imported data to work at.
104 */
105 void Execute( aiScene* pScene);
106
107private:
108
109 /** Configuration option: maximum smoothing angle, in radians*/
110 float configMaxAngle;
111 unsigned int configSourceUV;
112};
113
114} // end of namespace Assimp
115
116#endif // AI_CALCTANGENTSPROCESS_H_INC
117