GLTFUtils.h

 /*
  * Copyright 2018-2021 ANSYS, Inc. Unauthorized use, distribution, or duplication is prohibited.
  * 
  * Restricted Rights Legend
  *
  * Use, duplication, or disclosure of this
  * software and its documentation by the
  * Government is subject to restrictions as
  * set forth in subdivision [(b)(3)(ii)] of
  * the Rights in Technical Data and Computer
  * Software clause at 52.227-7013.
  */
 #ifndef __INCLUDED_GLTF_GLTFUTILS__
 #define __INCLUDED_GLTF_GLTFUTILS__
  
 #include "GLTFCommon.h"
  
 namespace ANSYS { namespace Nexus { namespace GLTFWriter {
     namespace Utils {
         GLTFWRITERSPEC void ComputeElementNormals3(const unsigned int numVertices, 
             const float *vertices, 
             const unsigned int numElements, 
             const unsigned int elementSize, 
             const unsigned short *indices, 
             float *normals 
         );
         GLTFWRITERSPEC void ComputeElementNormals3(const unsigned int numVertices, 
             const float *vertices, 
             const unsigned int numElements, 
             const unsigned int elementSize, 
             const unsigned int *indices, 
             float *normals 
         );
  
         GLTFWRITERSPEC void ComputeVertexNormals3(const unsigned int numVertices, 
             const float *vertices, 
             const unsigned int numElements, 
             const unsigned int elementSize, 
             const unsigned short *indices, 
             float *normals 
         );
         GLTFWRITERSPEC void ComputeVertexNormals3(const unsigned int numVertices, 
             const float *vertices, 
             const unsigned int numElements, 
             const unsigned int elementSize, 
             const unsigned int *indices, 
             float *normals 
         );
  
 #if 0
         GLTFWRITERSPEC unsigned int CreateVectors(unsigned int resolution, 
                                                   float offset, 
                                                   unsigned int numLocations, 
                                                   const float *locations, 
                                                   const float *lengths, 
                                                   const float *directions, 
                                                   std::vector<float> &vertices, 
                                                   std::vector<unsigned int> &indices, 
                                                   std::vector<unsigned int> &newToOld 
                                                   );
         GLTFWRITERSPEC void CreateStreamTubes(unsigned int resolution, 
                                               float diameter, 
                                               unsigned int numLines, 
                                               const unsigned int *lineLengths, 
                                               const float *locations, 
                                               std::vector<float> &vertices, 
                                               std::vector<unsigned int> &indices, 
                                               std::vector<unsigned int> &newToOld 
                                               );
 #endif
  
         class Repack 
         {
         protected:
             virtual ~Repack() {}
  
         public:
             static GLTFWRITERSPEC Repack *Create(unsigned int elementCount, 
                 unsigned int elementSize, 
                 const unsigned int *indices 
             );
             static GLTFWRITERSPEC void Destroy(Repack *packer);
  
             GLTFWRITERSPEC virtual unsigned int NumPacks() const = 0;
             GLTFWRITERSPEC virtual unsigned int NumAttributes(unsigned int packNum 
             ) const = 0;
             GLTFWRITERSPEC virtual const int *ConstructRepackAttribute(const unsigned int *indices, 
                 unsigned int attributeSize, 
                 const int *attributeData, 
                 unsigned int packNum 
             ) = 0;
             GLTFWRITERSPEC virtual const float *ConstructRepackAttribute(const unsigned int *indices, 
                 unsigned int attributeSize, 
                 const float *attributeData, 
                 unsigned int packNum 
             ) = 0;
             GLTFWRITERSPEC virtual unsigned int NumElements(unsigned int packNum 
             ) const = 0;
             GLTFWRITERSPEC virtual const unsigned short *ConstructRepackIndex(const unsigned int *indices, 
                 unsigned int packNum 
             ) = 0;
         };
     };
  
 } } } 
  
 #endif
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