assimp/code/LWSLoader.h

/*
Open Asset Import Library (assimp)
----------------------------------------------------------------------

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All rights reserved.

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  following disclaimer.

* Redistributions in binary form must reproduce the above
  copyright notice, this list of conditions and the
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* Neither the name of the assimp team, nor the names of its
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"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 
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*/

/** @file  LWSLoader.h
 *  @brief Declaration of the LightWave scene importer class. 
 */
#ifndef AI_LWSLOADER_H_INCLUDED
#define AI_LWSLOADER_H_INCLUDED

#include "LWOFileData.h"
#include "SceneCombiner.h"
#include "BaseImporter.h"

struct aiImporterDesc;

namespace Assimp	{
	class BatchLoader;
    class Importer;
    class IOSystem;

	namespace LWS	{

// ---------------------------------------------------------------------------
/** Represents an element in a LWS file.
 *
 *  This can either be a single data line - <name> <value> or a data
 *  group - { name <data_line0> ... n }
 */
class Element
{
public:
	Element()
	{}

	// first: name, second: rest
	std::string tokens[2];
	std::list<Element> children;

	//! Recursive parsing function
	void Parse (const char*& buffer);
};

#define AI_LWS_MASK (0xffffffff >> 4u)

// ---------------------------------------------------------------------------
/** Represents a LWS scenegraph element
 */
struct NodeDesc
{
	NodeDesc()
		:	number	(0)
		,	parent	(0)
		,	name	("")
		,	isPivotSet (false)
		,	lightColor (1.f,1.f,1.f)
		,	lightIntensity (1.f)
		,	lightType (0)
		,	lightFalloffType (0)
		,	lightConeAngle (45.f)
		,	parent_resolved (NULL)
	{}

	enum {
	
		OBJECT = 1,
		LIGHT  = 2,
		CAMERA = 3,
		BONE   = 4
	} type; // type of node

	// if object: path
	std::string path;
	unsigned int id;

	// number of object
	unsigned int number;

	// index of parent index
	unsigned int parent;

	// lights & cameras & dummies: name
	const char* name;

	// animation channels
	std::list< LWO::Envelope > channels;

	// position of pivot point
	aiVector3D pivotPos;
	bool isPivotSet;



	// color of light source
	aiColor3D lightColor;

	// intensity of light source
	float lightIntensity;

	// type of light source
	unsigned int lightType;

	// falloff type of light source
	unsigned int lightFalloffType;

	// cone angle of (spot) light source
	float lightConeAngle;

	// soft cone angle of (spot) light source
	float lightEdgeAngle;



	// list of resolved children
	std::list< NodeDesc* > children;

	// resolved parent node
	NodeDesc* parent_resolved;


	// for std::find()
	bool operator == (unsigned int num)  const {
		if (!num)
			return false;
		unsigned int _type = num >> 28u;
		
		return _type == static_cast<unsigned int>(type) && (num & AI_LWS_MASK) == number;
	}
};

} // end namespace LWS

// ---------------------------------------------------------------------------
/** LWS (LightWave Scene Format) importer class.
 *
 *  This class does heavily depend on the LWO importer class. LWS files
 *  contain mainly descriptions how LWO objects are composed together
 *  in a scene. 
*/
class LWSImporter : public BaseImporter
{
public:
	LWSImporter();
	~LWSImporter();


public:

	// -------------------------------------------------------------------
	// Check whether we can read a specific file
	bool CanRead( const std::string& pFile, IOSystem* pIOHandler,
		bool checkSig) const;

protected:

	// -------------------------------------------------------------------
	// Get list of supported extensions
	const aiImporterDesc* GetInfo () const;

	// -------------------------------------------------------------------
	// Import file into given scene data structure
	void InternReadFile( const std::string& pFile, aiScene* pScene, 
		IOSystem* pIOHandler);

	// -------------------------------------------------------------------
	// Setup import properties
	void SetupProperties(const Importer* pImp);

private:


	// -------------------------------------------------------------------
	// Read an envelope description
	void ReadEnvelope(const LWS::Element& dad, LWO::Envelope& out );

	// -------------------------------------------------------------------
	// Read an envelope description for the older LW file format
	void ReadEnvelope_Old(std::list< LWS::Element >::const_iterator& it, 
		const std::list< LWS::Element >::const_iterator& end,
		LWS::NodeDesc& nodes,
		unsigned int version);

	// -------------------------------------------------------------------
	// Setup a nice name for a node 
	void SetupNodeName(aiNode* nd, LWS::NodeDesc& src);

	// -------------------------------------------------------------------
	// Recursively build the scenegraph
	void BuildGraph(aiNode* nd, 
		LWS::NodeDesc& src, 
		std::vector<AttachmentInfo>& attach,
		BatchLoader& batch,
		aiCamera**& camOut,
		aiLight**& lightOut, 
		std::vector<aiNodeAnim*>& animOut);

	// -------------------------------------------------------------------
	// Try several dirs until we find the right location of a LWS file.
	std::string FindLWOFile(const std::string& in);

private:

	bool configSpeedFlag;
	IOSystem* io;

	double first,last,fps;

	bool noSkeletonMesh; 
};

} // end of namespace Assimp

#endif // AI_LWSIMPORTER_H_INC