M2文件头

M2文件中的信息大体是这样的

全局纹理列表

全局顶点列表

• Position
• Blend weights
• Blend indices
• Normal
• Texture coordinates

LOD (每个模型共4级?)

• Vertex indices (这级LOD用到的顶点 为全局顶点列表的索引)
• Face indices (每个三角形有三个, 同样是全局顶点列表中的索引)
• Vertex properties (每个顶点索引有一个, 未知)
• Submeshes (一般每种材质一个)
• Texture units (引用Subemesh, 全局纹理列表的索引, 绑定纹理单元的数目)

全局包围体 (用来碰撞检测?)

动画(Animations, global sequences)

骨骼(Skeleton)

额外的渲染信息: 颜色, 透明度, 纹理动画, 模型混合等.

特效: 条带, 粒子

灯光

摄像机

struct ModelHeader {
	char id[4];					//"MD20" 
	uint8 version[4];
	uint32 nameLength;			//model name length (including \0)
	uint32 nameOfs;				//model name offset 
	uint32 type;				//Model type? always 0, 1 or 3 (mostly 0) 

	uint32 nGlobalSequences;	//number of global sequences 
	uint32 ofsGlobalSequences;	//offset to global sequences 
	uint32 nAnimations;			//number of animation sequences 
	uint32 ofsAnimations;		//offset to animation sequences 
	uint32 nC;
	uint32 ofsC;
	uint32 nD;					//always 201 or 203 depending on WoW client version 
	uint32 ofsD;
	uint32 nBones;				//number of bones 
	uint32 ofsBones;			//offset to bones 
	uint32 nF;					//bone lookup table 
	uint32 ofsF;

	uint32 nVertices;			//number of vertices 
	uint32 ofsVertices;			//offset to vertices 
	uint32 nViews;				//number of views (LOD versions?) 4 for every model 
	uint32 ofsViews;			//offset to views 

	uint32 nColors;				//number of color definitions 
	uint32 ofsColors;			//offset to color definitions 

	uint32 nTextures;			//number of textures 
	uint32 ofsTextures;			//offset to texture definitions 

	uint32 nTransparency;		//number of transparency definitions 
	uint32 ofsTransparency;		//offset to transparency definitions 
	uint32 nI;					// always unused ?
	uint32 ofsI;
	uint32 nTexAnims;			//number of texture animations 
	uint32 ofsTexAnims;			//offset to texture animations 
	uint32 nTexReplace;
	uint32 ofsTexReplace;

	uint32 nTexFlags;			//number of blending mode definitions 
	uint32 ofsTexFlags;			//offset to blending mode definitions 
	uint32 nY;					//bone lookup table 
	uint32 ofsY;

	uint32 nTexLookup;			//number of texture lookup table entries 
	uint32 ofsTexLookup;		//offset to texture lookup table 

	uint32 nTexUnitLookup;		//texture unit definitions? 
	uint32 ofsTexUnitLookup;
	uint32 nTransparencyLookup; //number of transparency lookup table entries 
	uint32 ofsTransparencyLookup;//offset to transparency lookup table 
	uint32 nTexAnimLookup;		//number of texture animation lookup table entries 
	uint32 ofsTexAnimLookup;

	float floats[14];

	uint32 nBoundingTriangles;
	uint32 ofsBoundingTriangles;
	uint32 nBoundingVertices;
	uint32 ofsBoundingVertices;
	uint32 nBoundingNormals;
	uint32 ofsBoundingNormals;

	uint32 nAttachments;
	uint32 ofsAttachments;
	uint32 nAttachLookup;
	uint32 ofsAttachLookup;
	uint32 nQ;
	uint32 ofsQ;
	uint32 nLights;				//number of lights  
	uint32 ofsLights;			//offset to lights 
	uint32 nCameras;			//number of cameras 
	uint32 ofsCameras;			//offset to cameras 
	uint32 nT;
	uint32 ofsT;
	uint32 nRibbonEmitters;		//number of ribbon emitters  
	uint32 ofsRibbonEmitters;	//offset to ribbon emitters 
	uint32 nParticleEmitters;	//number of particle emitters 
	uint32 ofsParticleEmitters;	//offset to particle emitters 
};

这把刀看起来挺漂亮, 就拿它开刀了:

16进制文件分析: