assimp/code/SkeletonMeshBuilder.h

/** Helper class to construct a dummy mesh for file formats containing only motion data */

/*
Open Asset Import Library (ASSIMP)
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Copyright (c) 2006-2008, ASSIMP Development Team
All rights reserved.

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*/

#ifndef AI_SKELETONMESHBUILDER_H_INC
#define AI_SKELETONMESHBUILDER_H_INC

#include <vector>
#include "../include/aiMesh.h"

struct aiScene;
struct aiNode;

namespace Assimp
{

/** 
 * This little helper class constructs a dummy mesh for a given scene
 * the resembles the node hierarchy. This is useful for file formats
 * that don't carry any mesh data but only animation data.
 */
class ASSIMP_API SkeletonMeshBuilder
{
public:
  /** The constructor processes the given scene and adds a mesh there. Does nothing
   * if the scene already has mesh data. 
   * @param pScene The scene for which a skeleton mesh should be constructed.
   * @param root The node to start with. NULL is the scene root
   */
  SkeletonMeshBuilder( aiScene* pScene, aiNode* root = NULL);

protected:
  /** Recursively builds a simple mesh representation for the given node and also creates
   * a joint for the node that affects this part of the mesh.
   * @param pNode The node to build geometry for.
   */
  void CreateGeometry( const aiNode* pNode);

  /** Creates the mesh from the internally accumulated stuff and returns it. */
  aiMesh* CreateMesh();

  /** Creates a dummy material and returns it. */
  aiMaterial* CreateMaterial();

protected:
  /** space to assemble the mesh data: points */
  std::vector<aiVector3D> mVertices;

  /** faces */
  struct Face 
  { 
    unsigned int mIndices[3]; 
    Face();
    Face( unsigned int p0, unsigned int p1, unsigned int p2)
    { mIndices[0] = p0; mIndices[1] = p1; mIndices[2] = p2; } 
  };
  std::vector<Face> mFaces;
  
  /** bones */
  std::vector<aiBone*> mBones;
};

} // end of namespace Assimp

#endif // AI_SKELETONMESHBUILDER_H_INC