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diff --git a/src/others/irrlicht-1.8.1/include/IColladaMeshWriter.h b/src/others/irrlicht-1.8.1/include/IColladaMeshWriter.h
new file mode 100644
index 0000000..e3f48a7
--- /dev/null
+++ b/src/others/irrlicht-1.8.1/include/IColladaMeshWriter.h
@@ -0,0 +1,405 @@
+// Copyright (C) 2002-2012 Nikolaus Gebhardt
+// This file is part of the "Irrlicht Engine".
+// For conditions of distribution and use, see copyright notice in irrlicht.h
+#ifndef __IRR_I_COLLADA_MESH_WRITER_H_INCLUDED__
+#define __IRR_I_COLLADA_MESH_WRITER_H_INCLUDED__
+#include "IMeshWriter.h"
+#include "ISceneNode.h"
+#include "IAnimatedMesh.h"
+#include "SMaterial.h"
+namespace irr
+{
+namespace io
+{
+        class IWriteFile;
+} // end namespace io
+namespace scene
+{
+        //! Lighting models - more or less the way Collada categorizes materials
+        enum E_COLLADA_TECHNIQUE_FX
+        {
+                //! Blinn-phong which is default for opengl and dx fixed function pipelines.
+                //! But several well-known renderers don't support it and prefer phong.
+                ECTF_BLINN,     
+                //! Phong shading, default in many external renderers.
+                ECTF_PHONG,
+                //! diffuse shaded surface that is independent of lighting.
+                ECTF_LAMBERT,
+                // constantly shaded surface that is independent of lighting. 
+                ECTF_CONSTANT
+        };
+        //! How to interpret the opacity in collada
+        enum E_COLLADA_TRANSPARENT_FX
+        {
+                //! default - only alpha channel of color or texture is used.
+                ECOF_A_ONE = 0,
+                //! Alpha values for each RGB channel of color or texture are used. 
+                ECOF_RGB_ZERO = 1
+        };
+        //! Color names collada uses in it's color samplers
+        enum E_COLLADA_COLOR_SAMPLER
+        {
+                ECCS_DIFFUSE,
+                ECCS_AMBIENT,
+                ECCS_EMISSIVE,
+                ECCS_SPECULAR,
+                ECCS_TRANSPARENT,
+                ECCS_REFLECTIVE
+        };
+        //! Irrlicht colors which can be mapped to E_COLLADA_COLOR_SAMPLER values
+        enum E_COLLADA_IRR_COLOR
+        {
+                //! Don't write this element at all
+                ECIC_NONE,
+                //! Check IColladaMeshWriterProperties for custom color
+                ECIC_CUSTOM,
+                //! Use SMaterial::DiffuseColor
+                ECIC_DIFFUSE,
+                //! Use SMaterial::AmbientColor
+                ECIC_AMBIENT,
+                //! Use SMaterial::EmissiveColor
+                ECIC_EMISSIVE,
+                //! Use SMaterial::SpecularColor
+                ECIC_SPECULAR
+        };
+        //! Control when geometry elements are created
+        enum E_COLLADA_GEOMETRY_WRITING
+        {
+                //! Default - write each mesh exactly once to collada. Optimal but will not work with many tools.
+                ECGI_PER_MESH,  
+                //! Write each mesh as often as it's used with different materials-names in the scene.
+                //! Material names which are used here are created on export, so using the IColladaMeshWriterNames
+                //! interface you have some control over how many geometries are written.
+                ECGI_PER_MESH_AND_MATERIAL
+        };
+        //! Callback interface for properties which can be used to influence collada writing
+        class IColladaMeshWriterProperties  : public virtual IReferenceCounted
+        {
+        public:
+                virtual ~IColladaMeshWriterProperties ()        {}
+                //! Which lighting model should be used in the technique (FX) section when exporting effects (materials)
+                virtual E_COLLADA_TECHNIQUE_FX getTechniqueFx(const video::SMaterial& material) const = 0;
+                //! Which texture index should be used when writing the texture of the given sampler color.
+                /** \return the index to the texture-layer or -1 if that texture should never be exported 
+                        Note: for ECCS_TRANSPARENT by default the alpha channel is used, if you want to use RGB you have to set
+                        also the ECOF_RGB_ZERO flag in getTransparentFx.  */
+                virtual s32 getTextureIdx(const video::SMaterial & material, E_COLLADA_COLOR_SAMPLER cs) const = 0;
+                //! Return which color from Irrlicht should be used for the color requested by collada
+                /** Note that collada allows exporting either texture or color, not both. 
+                        So color mapping is only checked if we have no valid texture already.
+                        By default we try to return best fits when possible. For example ECCS_DIFFUSE is mapped to ECIC_DIFFUSE.
+                        When ECIC_CUSTOM is returned then the result of getCustomColor will be used. */
+                virtual E_COLLADA_IRR_COLOR getColorMapping(const video::SMaterial & material, E_COLLADA_COLOR_SAMPLER cs) const = 0;
+                //! Return custom colors for certain color types requested by collada. 
+                /** Only used when getColorMapping returns ECIC_CUSTOM for the same paramters. */
+                virtual video::SColor getCustomColor(const video::SMaterial & material, E_COLLADA_COLOR_SAMPLER cs) const = 0;
+                //! Return the transparence color interpretation.
+                /** Not this is only about ECCS_TRANSPARENT and does not affect getTransparency. */
+                virtual E_COLLADA_TRANSPARENT_FX getTransparentFx(const video::SMaterial& material) const = 0;
+                //! Transparency value for that material. 
+                /** This value is additional to transparent settings, if both are set they will be multiplicated.
+                \return 1.0 for fully transparent, 0.0 for not transparent and not written at all when < 0.f */
+                virtual f32 getTransparency(const video::SMaterial& material) const = 0;
+                //! Reflectivity value for that material
+                /** The amount of perfect mirror reflection to be added to the reflected light 
+                \return 0.0 - 1.0 for reflectivity and element is not written at all when < 0.f */
+                virtual f32 getReflectivity(const video::SMaterial& material) const = 0;
+                //! Return index of refraction for that material
+                /**     By default we don't write that.
+                \return a value greater equal 0.f to write \<index_of_refraction\> when it is lesser than 0 nothing will be written */
+                virtual f32 getIndexOfRefraction(const video::SMaterial& material) const = 0;
+                //! Should node be used in scene export? (only needed for scene-writing, ignored in mesh-writing)
+                //! By default all visible nodes are exported.
+                virtual bool isExportable(const irr::scene::ISceneNode * node) const = 0;
+                //! Return the mesh for the given node. If it has no mesh or shouldn't export it's mesh 
+                //! you can return 0 in which case only the transformation matrix of the node will be used.
+                // Note: Function is not const because there is no const getMesh() function.
+                virtual IMesh* getMesh(irr::scene::ISceneNode * node) = 0;
+                //! Return if the node has it's own material overwriting the mesh-materials
+                /** Usually true except for mesh-nodes which have isReadOnlyMaterials set.
+                This is mostly important for naming (as ISceneNode::getMaterial() already returns the correct material).
+                You have to override it when exporting custom scenenodes with own materials.
+                \return true => The node's own material is used, false => ignore node material and use the one from the mesh */
+                virtual bool useNodeMaterial(const scene::ISceneNode* node) const = 0;
+        };
+        //! Callback interface to use custom names on collada writing.
+        /** You can either modify names and id's written to collada or you can use
+        this interface to just find out which names are used on writing.
+        */
+        class IColladaMeshWriterNames  : public virtual IReferenceCounted
+        {
+        public:
+        
+                virtual ~IColladaMeshWriterNames () {}
+                //! Return a unique name for the given mesh
+                /** Note that names really must be unique here per mesh-pointer, so 
+                mostly it's a good idea to return the nameForMesh from 
+                IColladaMeshWriter::getDefaultNameGenerator(). Also names must follow 
+                the xs::NCName standard to be valid, you can run them through 
+                IColladaMeshWriter::toNCName to ensure that.
+                \param mesh Pointer to the mesh which needs a name
+                \param instance When E_COLLADA_GEOMETRY_WRITING is not ECGI_PER_MESH then 
+                several instances of the same mesh can be written and this counts them.
+                */
+                virtual irr::core::stringw nameForMesh(const scene::IMesh* mesh, int instance) = 0;
+                //! Return a unique name for the given node
+                /** Note that names really must be unique here per node-pointer, so 
+                mostly it's a good idea to return the nameForNode from 
+                IColladaMeshWriter::getDefaultNameGenerator(). Also names must follow 
+                the xs::NCName standard to be valid, you can run them through 
+                IColladaMeshWriter::toNCName to ensure that.
+                */
+                virtual irr::core::stringw nameForNode(const scene::ISceneNode* node) = 0;
+                //! Return a name for the material
+                /** There is one material created in the writer for each unique name. 
+                So you can use this to control the number of materials which get written. 
+                For example Irrlicht does by default write one material for each material
+                instanced by a node. So if you know that in your application material 
+                instances per node are identical between different nodes you can reduce 
+                the number of exported materials using that knowledge by using identical 
+                names for such shared materials. 
+                Names must follow the xs::NCName standard to be valid, you can run them 
+                through IColladaMeshWriter::toNCName to ensure that.
+                */
+                virtual irr::core::stringw nameForMaterial(const video::SMaterial & material, int materialId, const scene::IMesh* mesh, const scene::ISceneNode* node) = 0;
+        };
+        //! Interface for writing meshes
+        class IColladaMeshWriter : public IMeshWriter
+        {
+        public:
+                IColladaMeshWriter() 
+                        : Properties(0), DefaultProperties(0), NameGenerator(0), DefaultNameGenerator(0)
+                        , WriteTextures(true), WriteDefaultScene(true), ExportSMaterialOnce(true)
+                        , AmbientLight(0.f, 0.f, 0.f, 1.f)
+                        , GeometryWriting(ECGI_PER_MESH)
+                {
+                }
+                //! Destructor
+                virtual ~IColladaMeshWriter() 
+                {
+                        if ( Properties )
+                                Properties->drop();
+                        if ( DefaultProperties )
+                                DefaultProperties->drop();
+                        if ( NameGenerator )
+                                NameGenerator->drop();
+                        if ( DefaultNameGenerator )
+                                DefaultNameGenerator->drop();
+                }
+                //! writes a scene starting with the given node
+                virtual bool writeScene(io::IWriteFile* file, scene::ISceneNode* root) = 0;
+                //! Set if texture information should be written
+                virtual void setWriteTextures(bool write)
+                {
+                        WriteTextures = write;
+                }
+                //! Get if texture information should be written
+                virtual bool getWriteTextures() const 
+                {
+                        return WriteTextures;
+                }
+                //! Set if a default scene should be written when writing meshes.
+                /** Many collada readers fail to read a mesh if the collada files doesn't contain a scene as well.
+                The scene is doing an instantiation of the mesh.
+                When using writeScene this flag is ignored (as we have scene there already)
+                */
+                virtual void setWriteDefaultScene(bool write)
+                {
+                        WriteDefaultScene = write;
+                }
+                //! Get if a default scene should be written
+                virtual bool getWriteDefaultScene() const
+                {
+                        return WriteDefaultScene;
+                }
+                //! Sets ambient color of the scene to write
+                virtual void setAmbientLight(const video::SColorf &ambientColor)
+                {
+                        AmbientLight = ambientColor;
+                }
+                //! Return ambient light of the scene which is written
+                virtual video::SColorf getAmbientLight() const
+                {
+                        return AmbientLight;
+                }
+                //! Control when and how often a mesh is written
+                /** Optimally ECGI_PER_MESH would be always sufficent - writing geometry once per mesh.
+                Unfortunately many tools (at the time of writing this nearly all of them) have trouble
+                on import when different materials are used per node. So when you override materials
+                per node and importing the resuling collada has materials problems in other tools try 
+                using other values here. 
+                \param writeStyle One of the E_COLLADA_GEOMETRY_WRITING settings. 
+                */
+                virtual void setGeometryWriting(E_COLLADA_GEOMETRY_WRITING writeStyle) 
+                {
+                        GeometryWriting = writeStyle;
+                }
+                //! Get the current style of geometry writing.
+                virtual E_COLLADA_GEOMETRY_WRITING getGeometryWriting() const
+                {
+                        return GeometryWriting;
+                }
+                //! Make certain there is only one collada material generated per Irrlicht material
+                /** Checks before creating a collada material-name if an identical 
+                irr:::video::SMaterial has been exported already. If so don't export it with 
+                another name. This is set by default and leads to way smaller .dae files.
+                Note that if you need to disable this flag for some reason you can still 
+                get a similar effect using the IColladaMeshWriterNames::nameForMaterial
+                by returning identical names for identical materials there.
+                */
+                virtual void setExportSMaterialsOnlyOnce(bool exportOnce)
+                {
+                        ExportSMaterialOnce = exportOnce;
+                }
+                virtual bool getExportSMaterialsOnlyOnce() const
+                {
+                        return ExportSMaterialOnce;
+                }
+                //! Set properties to use by the meshwriter instead of it's default properties.
+                /** Overloading properties with an own class allows modifying the writing process in certain ways. 
+                By default properties are set to the DefaultProperties. */
+                virtual void setProperties(IColladaMeshWriterProperties * p)
+                {
+                        if ( p == Properties )
+                                return;
+                        if ( p ) 
+                                p->grab();
+                        if ( Properties )
+                                Properties->drop();
+                        Properties = p;
+                }
+                //! Get properties which are currently used.
+                virtual IColladaMeshWriterProperties * getProperties() const
+                {
+                        return Properties;
+                }
+                //! Return the original default properties of the writer. 
+                /** You can use this pointer in your own properties to access and return default values. */
+                IColladaMeshWriterProperties * getDefaultProperties() const 
+                { 
+                        return DefaultProperties; 
+                }
+                //! Install a generator to create custom names on export. 
+                virtual void setNameGenerator(IColladaMeshWriterNames * nameGenerator)
+                {
+                        if ( nameGenerator == NameGenerator )
+                                return;
+                        if ( nameGenerator ) 
+                                nameGenerator->grab();
+                        if ( NameGenerator )
+                                NameGenerator->drop();
+                        NameGenerator = nameGenerator;
+                }
+                //! Get currently used name generator
+                virtual IColladaMeshWriterNames * getNameGenerator() const
+                {
+                        return NameGenerator;
+                }
+                //! Return the original default name generator of the writer. 
+                /** You can use this pointer in your own generator to access and return default values. */
+                IColladaMeshWriterNames * getDefaultNameGenerator() const 
+                { 
+                        return DefaultNameGenerator; 
+                }
+                //! Restrict the characters of oldString a set of allowed characters in xs::NCName and add the prefix.
+                /** A tool function to help when using a custom name generator to generative valid names for collada names and id's. */
+                virtual irr::core::stringw toNCName(const irr::core::stringw& oldString, const irr::core::stringw& prefix=irr::core::stringw(L"_NC_")) const = 0;
+        protected:
+                // NOTE: You usually should also call setProperties with the same paraemter when using setDefaultProperties
+                virtual void setDefaultProperties(IColladaMeshWriterProperties * p)
+                {
+                        if ( p == DefaultProperties )
+                                return;
+                        if ( p ) 
+                                p->grab();
+                        if ( DefaultProperties )
+                                DefaultProperties->drop();
+                        DefaultProperties = p;
+                }
+                // NOTE: You usually should also call setNameGenerator with the same paraemter when using setDefaultProperties
+                virtual void setDefaultNameGenerator(IColladaMeshWriterNames * p)
+                {
+                        if ( p == DefaultNameGenerator )
+                                return;
+                        if ( p ) 
+                                p->grab();
+                        if ( DefaultNameGenerator )
+                                DefaultNameGenerator->drop();
+                        DefaultNameGenerator = p;
+                }
+        private:
+                IColladaMeshWriterProperties * Properties;
+                IColladaMeshWriterProperties * DefaultProperties;
+                IColladaMeshWriterNames * NameGenerator;
+                IColladaMeshWriterNames * DefaultNameGenerator;
+                bool WriteTextures;
+                bool WriteDefaultScene;
+                bool ExportSMaterialOnce;
+                video::SColorf AmbientLight;
+                E_COLLADA_GEOMETRY_WRITING GeometryWriting;
+        };
+} // end namespace
+} // end namespace
+#endif

diff --git a/src/others/irrlicht-1.8.1/include/IColladaMeshWriter.h b/src/others/irrlicht-1.8.1/include/IColladaMeshWriter.h new file mode 100644 index 0000000..e3f48a7 --- /dev/null +++ b/src/others/irrlicht-1.8.1/include/IColladaMeshWriter.h
@@ -0,0 +1,405 @@
	1	// Copyright (C) 2002-2012 Nikolaus Gebhardt
	2	// This file is part of the "Irrlicht Engine".
	3	// For conditions of distribution and use, see copyright notice in irrlicht.h
	4
	5	#ifndef __IRR_I_COLLADA_MESH_WRITER_H_INCLUDED__
	6	#define __IRR_I_COLLADA_MESH_WRITER_H_INCLUDED__
	7
	8	#include "IMeshWriter.h"
	9	#include "ISceneNode.h"
	10	#include "IAnimatedMesh.h"
	11	#include "SMaterial.h"
	12
	13	namespace irr
	14	{
	15	namespace io
	16	{
	17	class IWriteFile;
	18	} // end namespace io
	19
	20	namespace scene
	21	{
	22	//! Lighting models - more or less the way Collada categorizes materials
	23	enum E_COLLADA_TECHNIQUE_FX
	24	{
	25	//! Blinn-phong which is default for opengl and dx fixed function pipelines.
	26	//! But several well-known renderers don't support it and prefer phong.
	27	ECTF_BLINN,
	28	//! Phong shading, default in many external renderers.
	29	ECTF_PHONG,
	30	//! diffuse shaded surface that is independent of lighting.
	31	ECTF_LAMBERT,
	32	// constantly shaded surface that is independent of lighting.
	33	ECTF_CONSTANT
	34	};
	35
	36	//! How to interpret the opacity in collada
	37	enum E_COLLADA_TRANSPARENT_FX
	38	{
	39	//! default - only alpha channel of color or texture is used.
	40	ECOF_A_ONE = 0,
	41
	42	//! Alpha values for each RGB channel of color or texture are used.
	43	ECOF_RGB_ZERO = 1
	44	};
	45
	46	//! Color names collada uses in it's color samplers
	47	enum E_COLLADA_COLOR_SAMPLER
	48	{
	49	ECCS_DIFFUSE,
	50	ECCS_AMBIENT,
	51	ECCS_EMISSIVE,
	52	ECCS_SPECULAR,
	53	ECCS_TRANSPARENT,
	54	ECCS_REFLECTIVE
	55	};
	56
	57	//! Irrlicht colors which can be mapped to E_COLLADA_COLOR_SAMPLER values
	58	enum E_COLLADA_IRR_COLOR
	59	{
	60	//! Don't write this element at all
	61	ECIC_NONE,
	62
	63	//! Check IColladaMeshWriterProperties for custom color
	64	ECIC_CUSTOM,
	65
	66	//! Use SMaterial::DiffuseColor
	67	ECIC_DIFFUSE,
	68
	69	//! Use SMaterial::AmbientColor
	70	ECIC_AMBIENT,
	71
	72	//! Use SMaterial::EmissiveColor
	73	ECIC_EMISSIVE,
	74
	75	//! Use SMaterial::SpecularColor
	76	ECIC_SPECULAR
	77	};
	78
	79	//! Control when geometry elements are created
	80	enum E_COLLADA_GEOMETRY_WRITING
	81	{
	82	//! Default - write each mesh exactly once to collada. Optimal but will not work with many tools.
	83	ECGI_PER_MESH,
	84
	85	//! Write each mesh as often as it's used with different materials-names in the scene.
	86	//! Material names which are used here are created on export, so using the IColladaMeshWriterNames
	87	//! interface you have some control over how many geometries are written.
	88	ECGI_PER_MESH_AND_MATERIAL
	89	};
	90
	91	//! Callback interface for properties which can be used to influence collada writing
	92	class IColladaMeshWriterProperties : public virtual IReferenceCounted
	93	{
	94	public:
	95	virtual ~IColladaMeshWriterProperties () {}
	96
	97	//! Which lighting model should be used in the technique (FX) section when exporting effects (materials)
	98	virtual E_COLLADA_TECHNIQUE_FX getTechniqueFx(const video::SMaterial& material) const = 0;
	99
	100	//! Which texture index should be used when writing the texture of the given sampler color.
	101	/** \return the index to the texture-layer or -1 if that texture should never be exported
	102	Note: for ECCS_TRANSPARENT by default the alpha channel is used, if you want to use RGB you have to set
	103	also the ECOF_RGB_ZERO flag in getTransparentFx. */
	104	virtual s32 getTextureIdx(const video::SMaterial & material, E_COLLADA_COLOR_SAMPLER cs) const = 0;
	105
	106	//! Return which color from Irrlicht should be used for the color requested by collada
	107	/** Note that collada allows exporting either texture or color, not both.
	108	So color mapping is only checked if we have no valid texture already.
	109	By default we try to return best fits when possible. For example ECCS_DIFFUSE is mapped to ECIC_DIFFUSE.
	110	When ECIC_CUSTOM is returned then the result of getCustomColor will be used. */
	111	virtual E_COLLADA_IRR_COLOR getColorMapping(const video::SMaterial & material, E_COLLADA_COLOR_SAMPLER cs) const = 0;
	112
	113	//! Return custom colors for certain color types requested by collada.
	114	/** Only used when getColorMapping returns ECIC_CUSTOM for the same paramters. */
	115	virtual video::SColor getCustomColor(const video::SMaterial & material, E_COLLADA_COLOR_SAMPLER cs) const = 0;
	116
	117	//! Return the transparence color interpretation.
	118	/** Not this is only about ECCS_TRANSPARENT and does not affect getTransparency. */
	119	virtual E_COLLADA_TRANSPARENT_FX getTransparentFx(const video::SMaterial& material) const = 0;
	120
	121	//! Transparency value for that material.
	122	/** This value is additional to transparent settings, if both are set they will be multiplicated.
	123	\return 1.0 for fully transparent, 0.0 for not transparent and not written at all when < 0.f */
	124	virtual f32 getTransparency(const video::SMaterial& material) const = 0;
	125
	126	//! Reflectivity value for that material
	127	/** The amount of perfect mirror reflection to be added to the reflected light
	128	\return 0.0 - 1.0 for reflectivity and element is not written at all when < 0.f */
	129	virtual f32 getReflectivity(const video::SMaterial& material) const = 0;
	130
	131	//! Return index of refraction for that material
	132	/** By default we don't write that.
	133	\return a value greater equal 0.f to write \<index_of_refraction\> when it is lesser than 0 nothing will be written */
	134	virtual f32 getIndexOfRefraction(const video::SMaterial& material) const = 0;
	135
	136	//! Should node be used in scene export? (only needed for scene-writing, ignored in mesh-writing)
	137	//! By default all visible nodes are exported.
	138	virtual bool isExportable(const irr::scene::ISceneNode * node) const = 0;
	139
	140	//! Return the mesh for the given node. If it has no mesh or shouldn't export it's mesh
	141	//! you can return 0 in which case only the transformation matrix of the node will be used.
	142	// Note: Function is not const because there is no const getMesh() function.
	143	virtual IMesh* getMesh(irr::scene::ISceneNode * node) = 0;
	144
	145	//! Return if the node has it's own material overwriting the mesh-materials
	146	/** Usually true except for mesh-nodes which have isReadOnlyMaterials set.
	147	This is mostly important for naming (as ISceneNode::getMaterial() already returns the correct material).
	148	You have to override it when exporting custom scenenodes with own materials.
	149	\return true => The node's own material is used, false => ignore node material and use the one from the mesh */
	150	virtual bool useNodeMaterial(const scene::ISceneNode* node) const = 0;
	151
	152	};
	153
	154	//! Callback interface to use custom names on collada writing.
	155	/** You can either modify names and id's written to collada or you can use
	156	this interface to just find out which names are used on writing.
	157	*/
	158	class IColladaMeshWriterNames : public virtual IReferenceCounted
	159	{
	160	public:
	161
	162	virtual ~IColladaMeshWriterNames () {}
	163
	164	//! Return a unique name for the given mesh
	165	/** Note that names really must be unique here per mesh-pointer, so
	166	mostly it's a good idea to return the nameForMesh from
	167	IColladaMeshWriter::getDefaultNameGenerator(). Also names must follow
	168	the xs::NCName standard to be valid, you can run them through
	169	IColladaMeshWriter::toNCName to ensure that.
	170	\param mesh Pointer to the mesh which needs a name
	171	\param instance When E_COLLADA_GEOMETRY_WRITING is not ECGI_PER_MESH then
	172	several instances of the same mesh can be written and this counts them.
	173	*/
	174	virtual irr::core::stringw nameForMesh(const scene::IMesh* mesh, int instance) = 0;
	175
	176	//! Return a unique name for the given node
	177	/** Note that names really must be unique here per node-pointer, so
	178	mostly it's a good idea to return the nameForNode from
	179	IColladaMeshWriter::getDefaultNameGenerator(). Also names must follow
	180	the xs::NCName standard to be valid, you can run them through
	181	IColladaMeshWriter::toNCName to ensure that.
	182	*/
	183	virtual irr::core::stringw nameForNode(const scene::ISceneNode* node) = 0;
	184
	185	//! Return a name for the material
	186	/** There is one material created in the writer for each unique name.
	187	So you can use this to control the number of materials which get written.
	188	For example Irrlicht does by default write one material for each material
	189	instanced by a node. So if you know that in your application material
	190	instances per node are identical between different nodes you can reduce
	191	the number of exported materials using that knowledge by using identical
	192	names for such shared materials.
	193	Names must follow the xs::NCName standard to be valid, you can run them
	194	through IColladaMeshWriter::toNCName to ensure that.
	195	*/
	196	virtual irr::core::stringw nameForMaterial(const video::SMaterial & material, int materialId, const scene::IMesh* mesh, const scene::ISceneNode* node) = 0;
	197	};
	198
	199
	200	//! Interface for writing meshes
	201	class IColladaMeshWriter : public IMeshWriter
	202	{
	203	public:
	204
	205	IColladaMeshWriter()
	206	: Properties(0), DefaultProperties(0), NameGenerator(0), DefaultNameGenerator(0)
	207	, WriteTextures(true), WriteDefaultScene(true), ExportSMaterialOnce(true)
	208	, AmbientLight(0.f, 0.f, 0.f, 1.f)
	209	, GeometryWriting(ECGI_PER_MESH)
	210	{
	211	}
	212
	213	//! Destructor
	214	virtual ~IColladaMeshWriter()
	215	{
	216	if ( Properties )
	217	Properties->drop();
	218	if ( DefaultProperties )
	219	DefaultProperties->drop();
	220	if ( NameGenerator )
	221	NameGenerator->drop();
	222	if ( DefaultNameGenerator )
	223	DefaultNameGenerator->drop();
	224	}
	225
	226	//! writes a scene starting with the given node
	227	virtual bool writeScene(io::IWriteFile* file, scene::ISceneNode* root) = 0;
	228
	229
	230	//! Set if texture information should be written
	231	virtual void setWriteTextures(bool write)
	232	{
	233	WriteTextures = write;
	234	}
	235
	236	//! Get if texture information should be written
	237	virtual bool getWriteTextures() const
	238	{
	239	return WriteTextures;
	240	}
	241
	242	//! Set if a default scene should be written when writing meshes.
	243	/** Many collada readers fail to read a mesh if the collada files doesn't contain a scene as well.
	244	The scene is doing an instantiation of the mesh.
	245	When using writeScene this flag is ignored (as we have scene there already)
	246	*/
	247	virtual void setWriteDefaultScene(bool write)
	248	{
	249	WriteDefaultScene = write;
	250	}
	251
	252	//! Get if a default scene should be written
	253	virtual bool getWriteDefaultScene() const
	254	{
	255	return WriteDefaultScene;
	256	}
	257
	258	//! Sets ambient color of the scene to write
	259	virtual void setAmbientLight(const video::SColorf &ambientColor)
	260	{
	261	AmbientLight = ambientColor;
	262	}
	263
	264	//! Return ambient light of the scene which is written
	265	virtual video::SColorf getAmbientLight() const
	266	{
	267	return AmbientLight;
	268	}
	269
	270	//! Control when and how often a mesh is written
	271	/** Optimally ECGI_PER_MESH would be always sufficent - writing geometry once per mesh.
	272	Unfortunately many tools (at the time of writing this nearly all of them) have trouble
	273	on import when different materials are used per node. So when you override materials
	274	per node and importing the resuling collada has materials problems in other tools try
	275	using other values here.
	276	\param writeStyle One of the E_COLLADA_GEOMETRY_WRITING settings.
	277	*/
	278	virtual void setGeometryWriting(E_COLLADA_GEOMETRY_WRITING writeStyle)
	279	{
	280	GeometryWriting = writeStyle;
	281	}
	282
	283	//! Get the current style of geometry writing.
	284	virtual E_COLLADA_GEOMETRY_WRITING getGeometryWriting() const
	285	{
	286	return GeometryWriting;
	287	}
	288
	289	//! Make certain there is only one collada material generated per Irrlicht material
	290	/** Checks before creating a collada material-name if an identical
	291	irr:::video::SMaterial has been exported already. If so don't export it with
	292	another name. This is set by default and leads to way smaller .dae files.
	293	Note that if you need to disable this flag for some reason you can still
	294	get a similar effect using the IColladaMeshWriterNames::nameForMaterial
	295	by returning identical names for identical materials there.
	296	*/
	297	virtual void setExportSMaterialsOnlyOnce(bool exportOnce)
	298	{
	299	ExportSMaterialOnce = exportOnce;
	300	}
	301
	302	virtual bool getExportSMaterialsOnlyOnce() const
	303	{
	304	return ExportSMaterialOnce;
	305	}
	306
	307	//! Set properties to use by the meshwriter instead of it's default properties.
	308	/** Overloading properties with an own class allows modifying the writing process in certain ways.
	309	By default properties are set to the DefaultProperties. */
	310	virtual void setProperties(IColladaMeshWriterProperties * p)
	311	{
	312	if ( p == Properties )
	313	return;
	314	if ( p )
	315	p->grab();
	316	if ( Properties )
	317	Properties->drop();
	318	Properties = p;
	319	}
	320
	321	//! Get properties which are currently used.
	322	virtual IColladaMeshWriterProperties * getProperties() const
	323	{
	324	return Properties;
	325	}
	326
	327	//! Return the original default properties of the writer.
	328	/** You can use this pointer in your own properties to access and return default values. */
	329	IColladaMeshWriterProperties * getDefaultProperties() const
	330	{
	331	return DefaultProperties;
	332	}
	333
	334	//! Install a generator to create custom names on export.
	335	virtual void setNameGenerator(IColladaMeshWriterNames * nameGenerator)
	336	{
	337	if ( nameGenerator == NameGenerator )
	338	return;
	339	if ( nameGenerator )
	340	nameGenerator->grab();
	341	if ( NameGenerator )
	342	NameGenerator->drop();
	343	NameGenerator = nameGenerator;
	344	}
	345
	346	//! Get currently used name generator
	347	virtual IColladaMeshWriterNames * getNameGenerator() const
	348	{
	349	return NameGenerator;
	350	}
	351
	352	//! Return the original default name generator of the writer.
	353	/** You can use this pointer in your own generator to access and return default values. */
	354	IColladaMeshWriterNames * getDefaultNameGenerator() const
	355	{
	356	return DefaultNameGenerator;
	357	}
	358
	359	//! Restrict the characters of oldString a set of allowed characters in xs::NCName and add the prefix.
	360	/** A tool function to help when using a custom name generator to generative valid names for collada names and id's. */
	361	virtual irr::core::stringw toNCName(const irr::core::stringw& oldString, const irr::core::stringw& prefix=irr::core::stringw(L"_NC_")) const = 0;
	362
	363
	364	protected:
	365	// NOTE: You usually should also call setProperties with the same paraemter when using setDefaultProperties
	366	virtual void setDefaultProperties(IColladaMeshWriterProperties * p)
	367	{
	368	if ( p == DefaultProperties )
	369	return;
	370	if ( p )
	371	p->grab();
	372	if ( DefaultProperties )
	373	DefaultProperties->drop();
	374	DefaultProperties = p;
	375	}
	376
	377	// NOTE: You usually should also call setNameGenerator with the same paraemter when using setDefaultProperties
	378	virtual void setDefaultNameGenerator(IColladaMeshWriterNames * p)
	379	{
	380	if ( p == DefaultNameGenerator )
	381	return;
	382	if ( p )
	383	p->grab();
	384	if ( DefaultNameGenerator )
	385	DefaultNameGenerator->drop();
	386	DefaultNameGenerator = p;
	387	}
	388
	389	private:
	390	IColladaMeshWriterProperties * Properties;
	391	IColladaMeshWriterProperties * DefaultProperties;
	392	IColladaMeshWriterNames * NameGenerator;
	393	IColladaMeshWriterNames * DefaultNameGenerator;
	394	bool WriteTextures;
	395	bool WriteDefaultScene;
	396	bool ExportSMaterialOnce;
	397	video::SColorf AmbientLight;
	398	E_COLLADA_GEOMETRY_WRITING GeometryWriting;
	399	};
	400
	401
	402	} // end namespace
	403	} // end namespace
	404
	405	#endif