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1 /*
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2 Open Asset Import Library (assimp)
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3 ----------------------------------------------------------------------
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4
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5 Copyright (c) 2006-2012, assimp team
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6 All rights reserved.
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7
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8 Redistribution and use of this software in source and binary forms,
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9 with or without modification, are permitted provided that the
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10 following conditions are met:
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11
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12 * Redistributions of source code must retain the above
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13 copyright notice, this list of conditions and the
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14 following disclaimer.
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15
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16 * Redistributions in binary form must reproduce the above
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17 copyright notice, this list of conditions and the
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18 following disclaimer in the documentation and/or other
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19 materials provided with the distribution.
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20
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21 * Neither the name of the assimp team, nor the names of its
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22 contributors may be used to endorse or promote products
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23 derived from this software without specific prior
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24 written permission of the assimp team.
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25
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26 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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27 "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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28 LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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29 A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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30 OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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31 SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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32 LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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33 DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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34 THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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35 (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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36 OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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37
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38 ----------------------------------------------------------------------
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39 */
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40
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41
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42 /** @file Defines a post processing step to calculate tangents and
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43 bitangents on all imported meshes.*/
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44 #ifndef AI_CALCTANGENTSPROCESS_H_INC
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45 #define AI_CALCTANGENTSPROCESS_H_INC
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46
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47 #include "BaseProcess.h"
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48
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49 struct aiMesh;
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50
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51 namespace Assimp
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52 {
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53
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54 // ---------------------------------------------------------------------------
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55 /** The CalcTangentsProcess calculates the tangent and bitangent for any vertex
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56 * of all meshes. It is expected to be run before the JoinVerticesProcess runs
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57 * because the joining of vertices also considers tangents and bitangents for
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58 * uniqueness.
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59 */
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60 class ASSIMP_API_WINONLY CalcTangentsProcess : public BaseProcess
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61 {
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62 public:
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63
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64 CalcTangentsProcess();
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65 ~CalcTangentsProcess();
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66
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67 public:
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68 // -------------------------------------------------------------------
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69 /** Returns whether the processing step is present in the given flag.
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70 * @param pFlags The processing flags the importer was called with.
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71 * A bitwise combination of #aiPostProcessSteps.
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72 * @return true if the process is present in this flag fields,
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73 * false if not.
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74 */
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75 bool IsActive( unsigned int pFlags) const;
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76
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77 // -------------------------------------------------------------------
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78 /** Called prior to ExecuteOnScene().
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79 * The function is a request to the process to update its configuration
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80 * basing on the Importer's configuration property list.
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81 */
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82 void SetupProperties(const Importer* pImp);
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83
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84
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85 // setter for configMaxAngle
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86 inline void SetMaxSmoothAngle(float f)
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87 {
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88 configMaxAngle =f;
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89 }
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90
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91 protected:
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92
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93 // -------------------------------------------------------------------
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94 /** Calculates tangents and bitangents for a specific mesh.
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95 * @param pMesh The mesh to process.
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96 * @param meshIndex Index of the mesh
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97 */
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98 bool ProcessMesh( aiMesh* pMesh, unsigned int meshIndex);
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99
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100 // -------------------------------------------------------------------
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101 /** Executes the post processing step on the given imported data.
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102 * @param pScene The imported data to work at.
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103 */
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104 void Execute( aiScene* pScene);
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105
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106 private:
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107
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108 /** Configuration option: maximum smoothing angle, in radians*/
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109 float configMaxAngle;
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110 unsigned int configSourceUV;
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111 };
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112
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113 } // end of namespace Assimp
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114
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115 #endif // AI_CALCTANGENTSPROCESS_H_INC
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