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source: downloads/ColladaPlugin/include/OgreColladaGeometry.h @ 21

Last change on this file since 21 was 21, checked in by nicolasc, 17 years ago
added ogreode and Colladaplugin
File size: 7.2 KB

Rev	Line
[21]	1	/**
	2	* This source file is part of OgreColladaPlugin
	3	* an addon for OGRE (Object-oriented Graphics Rendering Engine)
	4	* For the latest info, see http://www.ogre3d.org/
	5	*
	6	* This program is free software; you can redistribute it and/or modify it under
	7	* the terms of the GNU Lesser General Public License as published by the Free Software
	8	* Foundation; either version 2 of the License, or (at your option) any later
	9	* version.
	10
	11	* This program is distributed in the hope that it will be useful, but WITHOUT
	12	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
	13	* FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details.
	14
	15	* You should have received a copy of the GNU Lesser General Public License along with
	16	* this program; if not, write to the Free Software Foundation, Inc., 59 Temple
	17	* Place - Suite 330, Boston, MA 02111-1307, USA, or go to
	18	* http://www.gnu.org/copyleft/lesser.txt.
	19	*
	20	* @author Philipp Hartl
	21	* @see README
	22	*/
	23
	24	#ifndef __COLLADA_GEOMETRY_H__
	25	#define __COLLADA_GEOMETRY_H__
	26
	27	#include "OgreColladaPrerequisites.h"
	28	#include "OgreColladaEntity.h"
	29
	30	namespace Ogre
	31	{
	32	struct ColladaGeometryPolygon;
	33	struct ColladaGeometryInputData;
	34	struct ColladaGeometrySource;
	35	struct ColladaGeometryOgreMesh;
	36	struct ColladaGeometryIndexData;
	37
	38	typedef std::vector<ColladaGeometryPolygon *> ColladaGeometryPolygonPtrVector;
	39	typedef std::vector<ColladaGeometryInputData *> ColladaGeometryInputDataPtrVector;
	40	typedef std::vector<ColladaGeometrySource *> ColladaGeometrySourcePtrVector;
	41	typedef std::vector<ColladaGeometryIndexData *> ColladaGeometryOgreMeshIndexData;
	42
	43	namespace ColladaGeometrySpecific
	44	{
	45	/**
	46	* <input semantic="...">
	47	*/
	48	enum Semantic
	49	{
	50	POSITION = 0,
	51	VERTEX,
	52	NORMAL,
	53	TEXCOORD,
	54	COLOR,
	55	UV,
	56
	57	UNKNOWN = -1
	58	};
	59
	60	/**
	61	* compare the string with collada syntax
	62	*
	63	* @param s the semantic string we have
	64	* @return the corresponding semantic type
	65	*/
	66	Semantic getSemantic(const String &s);
	67	}
	68
	69	/**
	70	* a geometry object
	71	* holds information about: collada <geometry> node
	72	* id, name, vertices, polygons, ...
	73	*/
	74	class ColladaGeometry : public ColladaEntity
	75	{
	76	public:
	77	ColladaGeometry(ColladaDocument doc, xmlNode n);
	78	virtual ~ColladaGeometry(void);
	79
	80	// ogre instance
	81	virtual MovableObject *getOgreInstance(void) const;
	82
	83	/**
	84	* import <geometry> node
	85	*
	86	* @see base class
	87	*/
	88	virtual bool doImport(void);
	89
	90	virtual EntityTypes getEntityType(void) const { return GEOMETRY; }
	91
	92	/**
	93	* reset the bounding box for the manually created mesh
	94	* iff b != NULL
	95	*
	96	* @param b the boundingbox from the collada scene node, see ColladaScene
	97	* @return void
	98	*/
	99	void setBoundingBox(ColladaBoundingBox *b);
	100
	101	/**
	102	* the name of an entity in a scene graph should be unique
	103	* (e.g. there could be more than one geometry instance with the same MeshPtr reference)
	104	* this function should be called before ogre instantiation
	105	*
	106	* @param s the unique name of the entity
	107	* @return void
	108	*/
	109	void setEntityName(const String &s) { mEntityName = s; }
	110
	111	private:
	112	// the primitives render operation type
	113	enum RenderType { POLYGONS, TRIANGLES };
	114
	115	ColladaGeometryPolygonPtrVector mPolygons;
	116	ColladaGeometrySourcePtrVector mSources;
	117	ColladaGeometryInputDataPtrVector mVertexInputs;
	118	RenderType mType;
	119	String mEntityName; // this name must be unique in the scene graph
	120	ColladaBoundingBox *mBB;
	121	bool mBBReset; // if AABB was resetted by collada scene node
	122
	123	ColladaGeometryOgreMesh *mOgreMesh;
	124
	125	/**
	126	* calculate AABB from imported vertex data
	127	* the triangulated ogremesh could be greater than the vertices from collada
	128	*
	129	* @param none
	130	* @return none
	131	*/
	132	void calcBoundingBox(void);
	133
	134	/**
	135	* create and load an ogre mesh instance
	136	*
	137	* @param none
	138	* @return void
	139	*/
	140	void createOgreMesh(void) const;
	141
	142	/**
	143	* convert all vertex and index data from collada
	144	* primitves into ogre triangle list
	145	* currently only <polygons> and <triangles> primitives are supported
	146	*
	147	* @param void
	148	* @return void
	149	*/
	150	void createTriangleList(void);
	151
	152	/**
	153	* import extra information of geometry
	154	*
	155	* @param node <extra> node
	156	* @return void
	157	*/
	158	void importExtra(xmlNode *extraNode);
	159
	160	/**
	161	* import all geometry data
	162	* including vertices, normals, texcoords, indices, ...
	163	* currently only polygons are implemented
	164	*
	165	* @param node <mesh> node
	166	* @return true if all sub-imports succeeds
	167	*/
	168	bool importMesh(xmlNode *meshNode);
	169
	170	/**
	171	* look for <polygons> or <triangles> nodes
	172	* dependent on param primitive
	173	* fill up the mInputPolygonsDataList
	174	*
	175	* @param meshNode <mesh> node
	176	* @param primitive polygons or triangles
	177	* @return true if <polygons> imported
	178	*/
	179	bool importPolygonsNodes(xmlNode *meshNode, const String &primitive);
	180
	181	/**
	182	* import <source> nodes (vertices, normals, texcoords, ...)
	183	*
	184	* @param sourceNode <source> node to load
	185	* @return a pointer at loaded source record, NULL otherwise
	186	*/
	187	ColladaGeometrySource importSourceNode(xmlNode sourceNode);
	188
	189	/**
	190	* look for <vertices> node
	191	* fill up mVertexInputs
	192	*
	193	* @param meshNode <mesh> node
	194	* @return true if <vertices> imported
	195	*/
	196	bool importVerticesNode(xmlNode *meshNode);
	197
	198	/**
	199	* only for debugging purpose
	200	* to see the values
	201	*/
	202	void printIndices(void);
	203	void printVertices(const unsigned short x);
	204	};
	205
	206	/**
	207	* holds <input semantic="" source="" idx="" /> data
	208	* if <input> child of <vertices> then idx and indices are not used
	209	*/
	210	struct ColladaGeometryInputData
	211	{
	212	uint idx; // unique index, used for indices offset
	213	intVector indices; // indices (vertex, normal, texcoord, ...)
	214	ColladaGeometrySource *source; // pointer at source record, accessed by indices, for VERTEX it is NULL
	215	ColladaGeometrySpecific::Semantic semantic; // semantic type
	216	};
	217
	218	/**
	219	* holds <polygons> data
	220	*/
	221	struct ColladaGeometryPolygon
	222	{
	223	bool setMaterial; // can material be attached?
	224	ColladaMaterial *material; // a ColladaMaterial pointer, with assigned name
	225	uint primitiveCount; // the total amount of polygon primitives
	226	uint vertexCount; // the number of vertices used by a polygon primitive
	227	uint inputCount; // the total amount of inputs
	228	ColladaGeometryInputDataPtrVector inputs; // a vector with polygon <input>
	229	};
	230
	231	/**
	232	* holds <source> data
	233	*/
	234	struct ColladaGeometrySource
	235	{
	236	String id; // the source identifier
	237	uint count; // the number of times the array is accessed
	238	uint stride; // the number of values to access per count iteration
	239	floatVector data; // the floating data vector
	240	};
	241
	242	/**
	243	* indices and material properties
	244	* needed by ColladaGeometryOgreMesh
	245	*/
	246	struct ColladaGeometryIndexData
	247	{
	248	String material;
	249	uint count;
	250	unsigned short *indices;
	251	};
	252
	253	/**
	254	* optimized ogre mesh data for hardware buffers
	255	* there is only one meshdata, but there could be more index data, mutlimaterial e.g.
	256	*/
	257	struct ColladaGeometryOgreMesh
	258	{
	259	bool drawNormals, drawTexCoords;
	260	uint vertexCount; // the number of vertices
	261	float *vertices; // vertices, [normals], [texcoords]
	262	ColladaGeometryOgreMeshIndexData indices;
	263	};
	264	}
	265
	266	#endif // __COLLADA_GEOMETRY_H__

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