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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All rights reserved.

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*/

/** @file SkeletonMeshBuilder.h
 *  Declares SkeletonMeshBuilder, a tiny utility to build dummy meshes
 *  for animation skeletons.
 */

#ifndef AI_SKELETONMESHBUILDER_H_INC
#define AI_SKELETONMESHBUILDER_H_INC

#include <vector>
#include "../include/assimp/mesh.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 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
	 * @param bKnobsOnly Set this to true if you don't want the connectors
	 *   between the knobs representing the nodes.
	 */
	SkeletonMeshBuilder( aiScene* pScene, aiNode* root = NULL,
		bool bKnobsOnly = false);

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;

	bool mKnobsOnly;
};

} // end of namespace Assimp

#endif // AI_SKELETONMESHBUILDER_H_INC