assimp/tools/assimp_cmd/Info.cpp

/*
---------------------------------------------------------------------------
Open Asset Import Library (ASSIMP)
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Copyright (c) 2006-2008, ASSIMP Development Team

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  following disclaimer.

* Redistributions in binary form must reproduce the above
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  derived from this software without specific prior
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LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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*/

/** @file  Info.cpp
 *  @brief Implementation of the 'assimp info' utility  */

#include "Main.h"

const char* AICMD_MSG_INFO_HELP_E = 
"assimp info <file> [-r]\n"
"\tPrint basic structure of a 3D model\n"
"\t-r,--raw: No postprocessing, do a raw import\n";


// -----------------------------------------------------------------------------------
unsigned int CountNodes(const aiNode* root)
{
	unsigned int i = 0;
	for (unsigned int a = 0; a < root->mNumChildren; ++a ) {
		i += CountNodes(root->mChildren[a]);
	}
	return 1+i;
}

// -----------------------------------------------------------------------------------
unsigned int GetMaxDepth(const aiNode* root)
{
	unsigned int cnt = 0;
	for (unsigned int i = 0; i < root->mNumChildren; ++i ) {
		cnt = std::max(cnt,GetMaxDepth(root->mChildren[i]));
	}
	return cnt+1;
}

// -----------------------------------------------------------------------------------
unsigned int CountVertices(const aiScene* scene)
{
	unsigned int cnt = 0;
	for(unsigned int i = 0; i < scene->mNumMeshes; ++i) {
		cnt += scene->mMeshes[i]->mNumVertices;
	}
	return cnt;
}

// -----------------------------------------------------------------------------------
unsigned int CountFaces(const aiScene* scene)
{
	unsigned int cnt = 0;
	for(unsigned int i = 0; i < scene->mNumMeshes; ++i) {
		cnt += scene->mMeshes[i]->mNumFaces;
	}
	return cnt;
}

// -----------------------------------------------------------------------------------
unsigned int CountBones(const aiScene* scene)
{
	unsigned int cnt = 0;
	for(unsigned int i = 0; i < scene->mNumMeshes; ++i) {
		cnt += scene->mMeshes[i]->mNumBones;
	}
	return cnt;
}

// -----------------------------------------------------------------------------------
unsigned int CountAnimChannels(const aiScene* scene)
{
	unsigned int cnt = 0;
	for(unsigned int i = 0; i < scene->mNumAnimations; ++i) {
		cnt += scene->mAnimations[i]->mNumChannels;
	}
	return cnt;
}

// -----------------------------------------------------------------------------------
unsigned int GetAvgFacePerMesh(const aiScene* scene) {
	return static_cast<unsigned int>(CountFaces(scene)/scene->mNumMeshes);
}

// -----------------------------------------------------------------------------------
unsigned int GetAvgVertsPerMesh(const aiScene* scene) {
	return static_cast<unsigned int>(CountVertices(scene)/scene->mNumMeshes);
}

// -----------------------------------------------------------------------------------
void FindSpecialPoints(const aiScene* scene,const aiNode* root,aiVector3D special_points[3],const aiMatrix4x4& mat=aiMatrix4x4())
{
	// XXX that could be greatly simplified by using code from code/ProcessHelper.h
	// XXX I just don't want to include it here.
	const aiMatrix4x4 trafo = root->mTransformation*mat;
	for(unsigned int i = 0; i < root->mNumMeshes; ++i) {
		const aiMesh* mesh = scene->mMeshes[root->mMeshes[i]];

		for(unsigned int a = 0; a < mesh->mNumVertices; ++a) {
			aiVector3D v = trafo*mesh->mVertices[a];

			special_points[0].x = std::min(special_points[0].x,v.x);
			special_points[0].y = std::min(special_points[0].y,v.y);
			special_points[0].z = std::min(special_points[0].z,v.z);

			special_points[1].x = std::max(special_points[1].x,v.x);
			special_points[1].y = std::max(special_points[1].y,v.y);
			special_points[1].z = std::max(special_points[1].z,v.z);
		}
	}

	for(unsigned int i = 0; i < root->mNumChildren; ++i) {
		FindSpecialPoints(scene,root->mChildren[i],special_points,trafo);
	}
}

// -----------------------------------------------------------------------------------
void FindSpecialPoints(const aiScene* scene,aiVector3D special_points[3])
{
	special_points[0] = aiVector3D(1e10f,1e10f,1e10f);
	special_points[1] = aiVector3D(-1e10f,-1e10f,-1e10f);

	FindSpecialPoints(scene,scene->mRootNode,special_points);
	special_points[2] = 0.5f*(special_points[0]+special_points[1]);
}

// -----------------------------------------------------------------------------------
std::string FindPTypes(const aiScene* scene)
{
	bool haveit[4] = {0};
	for(unsigned int i = 0; i < scene->mNumMeshes; ++i) {
		const unsigned int pt = scene->mMeshes[i]->mPrimitiveTypes;
		if (pt & aiPrimitiveType_POINT) {
			haveit[0]=true;
		}
		if (pt & aiPrimitiveType_LINE) {
			haveit[1]=true;
		}
		if (pt & aiPrimitiveType_TRIANGLE) {
			haveit[2]=true;
		}
		if (pt & aiPrimitiveType_POLYGON) {
			haveit[3]=true;
		}
	}
	return (haveit[0]?std::string("points"):"")+(haveit[1]?"lines":"")+
		(haveit[2]?"triangles":"")+(haveit[3]?"n-polygons":"");
}

// -----------------------------------------------------------------------------------
void PrintHierarchy(const aiNode* root, unsigned int maxnest, unsigned int maxline, 
					unsigned int cline, unsigned int cnest=0)
{
	if (cline++ >= maxline || cnest >= maxnest) {
		return;
	}

	for(unsigned int i = 0; i < cnest; ++i) {
		printf("-- ");
	}
	printf("\'%s\', meshes: %i\n",root->mName.data,root->mNumMeshes);
	for (unsigned int i = 0; i < root->mNumChildren; ++i ) {
		PrintHierarchy(root->mChildren[i],maxnest,maxline,cline,cnest+1);
		if(i == root->mNumChildren-1) {
			for(unsigned int i = 0; i < cnest; ++i) {
				printf("   ");
			}
			printf("<--\n");
		}
	}
}

// -----------------------------------------------------------------------------------
// Implementation of the assimp info utility to print basic file info
int Assimp_Info (const char** params, unsigned int num)
{
	if (num < 1) {
		printf("assimp info: Invalid number of arguments. "
			"See \'assimp info --help\'\n");
		return 1;
	}

	// --help
	if (!strcmp( params[0],"-h")||!strcmp( params[0],"--help")||!strcmp( params[0],"-?") ) {
		printf("%s",AICMD_MSG_INFO_HELP_E);
		return 0;
	}

	// asssimp info <file> [-r]
	if (num < 1) {
		printf("assimp info: Invalid number of arguments. "
			"See \'assimp info --help\'\n");
		return 1;
	}

	const std::string in  = std::string(params[0]);

	// do maximum post-processing unless -r was specified
	ImportData import;
	import.ppFlags = num>1&&(!strcmp(params[1],"--raw")||!strcmp(params[1],"-r")) ? 0
		: aiProcessPreset_TargetRealtime_MaxQuality;

	// import the main model
	const aiScene* scene = ImportModel(import,in);
	if (!scene) {
		printf("assimp info: Unable to load input file %s\n",
			in.c_str());
		return 5;
	}

	aiMemoryInfo mem;
	globalImporter->GetMemoryRequirements(mem);


	static const char* format_string = 
		"Memory consumption: %i B\n"
		"Nodes:              %i\n"
		"Maximum depth       %i\n"
		"Meshes:             %i\n"
		"Animations:         %i\n"
		"Textures (embed.):  %i\n"
		"Materials:          %i\n"
		"Cameras:            %i\n"
		"Lights:             %i\n"
		"Vertices:           %i\n"
		"Faces:              %i\n"
		"Bones:              %i\n"
		"Animation Channels: %i\n"
		"Primitive Types:    %s\n"
		"Average faces/mesh  %i\n"
		"Average verts/mesh  %i\n"
		"Minimum point      (%f %f %f)\n"
		"Maximum point      (%f %f %f)\n"
		"Center point       (%f %f %f)\n"

		;

	aiVector3D special_points[3];
	FindSpecialPoints(scene,special_points);
	printf(format_string,
		mem.total,
		CountNodes(scene->mRootNode),
		GetMaxDepth(scene->mRootNode),
		scene->mNumMeshes,
		scene->mNumAnimations,
		scene->mNumTextures,
		scene->mNumMaterials,
		scene->mNumCameras,
		scene->mNumLights,
		CountVertices(scene),
		CountFaces(scene),
		CountBones(scene),
		CountAnimChannels(scene),
		FindPTypes(scene).c_str(),
		GetAvgFacePerMesh(scene),
		GetAvgVertsPerMesh(scene),
		special_points[0][0],special_points[0][1],special_points[0][2],
		special_points[1][0],special_points[1][1],special_points[1][2],
		special_points[2][0],special_points[2][1],special_points[2][2]
		)
	;
	unsigned int total=0;
	for(unsigned int i = 0;i < scene->mNumMaterials; ++i) {
		aiString name;
		if (AI_SUCCESS==aiGetMaterialString(scene->mMaterials[i],AI_MATKEY_NAME,&name)) {
			printf("%s\n    \'%s\'",(total++?"":"\nNamed Materials:" ),name.data);
		}
	}
	if(total) {
		printf("\n");
	}

	total=0;
	for(unsigned int i = 0;i < scene->mNumMaterials; ++i) {
		aiString name;
		static const aiTextureType types[] = {
			aiTextureType_NONE,
			aiTextureType_DIFFUSE,
			aiTextureType_SPECULAR,
			aiTextureType_AMBIENT,
			aiTextureType_EMISSIVE,
			aiTextureType_HEIGHT,
			aiTextureType_NORMALS,
			aiTextureType_SHININESS,
			aiTextureType_OPACITY,
			aiTextureType_DISPLACEMENT,
			aiTextureType_LIGHTMAP,
			aiTextureType_REFLECTION,
			aiTextureType_UNKNOWN
		};
		for(unsigned int type = 0; type < sizeof(types)/sizeof(types[0]); ++type) {
			for(unsigned int idx = 0;AI_SUCCESS==aiGetMaterialString(scene->mMaterials[i],
				AI_MATKEY_TEXTURE(types[type],idx),&name); ++idx) {
				printf("%s\n    \'%s\'",(total++?"":"\nTexture Refs:" ),name.data);
			}
		}
	}
	if(total) {
		printf("\n");
	}

	total=0;
	for(unsigned int i = 0;i < scene->mNumAnimations; ++i) {
		if (scene->mAnimations[i]->mName.length) {
			printf("%s\n     \'%s\'",(total++?"":"\nNamed Animations:" ),scene->mAnimations[i]->mName.data);
		}
	}
	if(total) {
		printf("\n");
	}

	printf("\nNode hierarchy:\n");
	unsigned int cline=0;
	PrintHierarchy(scene->mRootNode,20,1000,cline);

	printf("\n");
	return 0;
}