assimp/tools/assimp_cmd/Info.cpp

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

#include "Main.h"

#include <cstdio>
#include <iostream>
#include <string>

const char* AICMD_MSG_INFO_HELP_E =
    "assimp info <file> [-r] [-v]\n"
    "\tPrint basic structure of a 3D model\n"
    "\t-r,--raw: No postprocessing, do a raw import\n"
    "\t-v,--verbose: Print verbose info such as node transform data\n"
    "\t-s, --silent: Print only minimal info\n";

const char *TREE_BRANCH_ASCII = "|-";
const char *TREE_BRANCH_UTF8 = "\xe2\x94\x9c\xe2\x95\xb4";
const char *TREE_STOP_ASCII = "'-";
const char *TREE_STOP_UTF8 = "\xe2\x94\x94\xe2\x95\xb4";
const char *TREE_CONTINUE_ASCII = "| ";
const char *TREE_CONTINUE_UTF8 = "\xe2\x94\x82 ";

// note: by default this is using utf-8 text.
// this is well supported on pretty much any linux terminal.
// if this causes problems on some platform,
// put an #ifdef to use the ascii version for that platform.
const char *TREE_BRANCH = TREE_BRANCH_UTF8;
const char *TREE_STOP = TREE_STOP_UTF8;
const char *TREE_CONTINUE = TREE_CONTINUE_UTF8;

// -----------------------------------------------------------------------------------
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 (scene->mNumMeshes != 0) ? static_cast<unsigned int>(CountFaces(scene)/scene->mNumMeshes) : 0;
}

// -----------------------------------------------------------------------------------
unsigned int GetAvgVertsPerMesh(const aiScene* scene) {
	return (scene->mNumMeshes != 0) ? static_cast<unsigned int>(CountVertices(scene)/scene->mNumMeshes) : 0;
}

// -----------------------------------------------------------------------------------
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(1e10,1e10,1e10);
	special_points[1] = aiVector3D(-1e10,-1e10,-1e10);

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

// -----------------------------------------------------------------------------------
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":"");
}

// -----------------------------------------------------------------------------------
// Prettily print the node graph to stdout
void PrintHierarchy(
	const aiNode* node,
	const std::string &indent,
	bool verbose,
	bool last = false,
	bool first = true
){
	// tree visualization
	std::string branchchar;
	if (first) { branchchar = ""; }
	else if (last) { branchchar = TREE_STOP; } // "'-"
	else { branchchar = TREE_BRANCH; } // "|-"

	// print the indent and the branch character and the name
	std::cout << indent << branchchar << node->mName.C_Str();

	// if there are meshes attached, indicate this
	if (node->mNumMeshes) {
		std::cout << " (mesh ";
		bool sep = false;
		for (size_t i=0; i < node->mNumMeshes; ++i) {
			unsigned int mesh_index = node->mMeshes[i];
			if (sep) { std::cout << ", "; }
			std::cout << mesh_index;
			sep = true;
		}
		std::cout << ")";
	}

	// finish the line
	std::cout << std::endl;

	// in verbose mode, print the transform data as well
	if (verbose) {
		// indent to use
		std::string indentadd;
		if (last) { indentadd += "  "; }
		else { indentadd += TREE_CONTINUE; } // "| "..
		if (node->mNumChildren == 0) { indentadd += "  "; }
		else { indentadd += TREE_CONTINUE; } // .."| "
		aiVector3D s, r, t;
		node->mTransformation.Decompose(s, r, t);
		if (s.x != 1.0 || s.y != 1.0 || s.z != 1.0) {
			std::cout << indent << indentadd;
			printf("  S:[%f %f %f]\n", s.x, s.y, s.z);
		}
		if (r.x || r.y || r.z) {
			std::cout << indent << indentadd;
			printf("  R:[%f %f %f]\n", r.x, r.y, r.z);
		}
		if (t.x || t.y || t.z) {
			std::cout << indent << indentadd;
			printf("  T:[%f %f %f]\n", t.x, t.y, t.z);
		}
	}

	// and recurse
	std::string nextIndent;
	if (first) { nextIndent = indent; }
	else if (last) { nextIndent = indent + "  "; }
	else { nextIndent = indent + TREE_CONTINUE; } // "| "
	for (size_t i = 0; i < node->mNumChildren; ++i) {
		bool lastone = (i == node->mNumChildren - 1);
		PrintHierarchy(
			node->mChildren[i],
			nextIndent,
			verbose,
			lastone,
			false
		);
	}
}

// -----------------------------------------------------------------------------------
// Implementation of the assimp info utility to print basic file info
int Assimp_Info (const char* const* params, unsigned int num) {
	// --help
	if (!strcmp( params[0],"-h")||!strcmp( params[0],"--help")||!strcmp( params[0],"-?") ) {
		printf("%s",AICMD_MSG_INFO_HELP_E);
		return AssimpCmdError::Success;
	}

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

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

	// get -r and -v arguments
	bool raw = false;
	bool verbose = false;
	bool silent = false;
	for(unsigned int i = 1; i < num; ++i) {
		if (!strcmp(params[i],"--raw")||!strcmp(params[i],"-r")) {
			raw = true;
		}
		if (!strcmp(params[i],"--verbose")||!strcmp(params[i],"-v")) {
			verbose = true;
		}
		if (!strcmp(params[i], "--silent") || !strcmp(params[i], "-s")) {
			silent = true;
		}
	}

	// Verbose and silent at the same time are not allowed
	if ( verbose && silent ) {
		printf("assimp info: Invalid arguments, verbose and silent at the same time are forbitten. ");
		return AssimpCmdInfoError::InvalidCombinaisonOfArguments;
	}
	
	// Parse post-processing flags unless -r was specified
	ImportData import;
	if (!raw) {
		// get import flags
		ProcessStandardArguments(import, params + 1, num - 1);

		//No custom post process flags defined, we set all the post process flags active
		if(import.ppFlags == 0)
			import.ppFlags |= 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 AssimpCmdError::FailedToLoadInputFile;
	}

	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]
		)
	;

	if (silent)
	{
		printf("\n");
		return AssimpCmdError::Success;
	}

	// meshes
	if (scene->mNumMeshes) {
		printf("\nMeshes:  (name) [vertices / bones / faces | primitive_types]\n");
	}
	for (unsigned int i = 0; i < scene->mNumMeshes; ++i) {
		const aiMesh* mesh = scene->mMeshes[i];
		printf("    %d (%s)", i, mesh->mName.C_Str());
		printf(
			": [%d / %d / %d |",
			mesh->mNumVertices,
			mesh->mNumBones,
			mesh->mNumFaces
		);
		const unsigned int ptypes = mesh->mPrimitiveTypes;
		if (ptypes & aiPrimitiveType_POINT) { printf(" point"); }
		if (ptypes & aiPrimitiveType_LINE) { printf(" line"); }
		if (ptypes & aiPrimitiveType_TRIANGLE) { printf(" triangle"); }
		if (ptypes & aiPrimitiveType_POLYGON) { printf(" polygon"); }
		printf("]\n");
	}

	// materials
	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");
	}

	// textures
	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_BASE_COLOR,
			aiTextureType_NORMAL_CAMERA,
			aiTextureType_EMISSION_COLOR,
			aiTextureType_METALNESS,
			aiTextureType_DIFFUSE_ROUGHNESS,
			aiTextureType_AMBIENT_OCCLUSION,
			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");
	}

	// animations
	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");
	}

	// node hierarchy
	printf("\nNode hierarchy:\n");
	PrintHierarchy(scene->mRootNode,"",verbose);

	printf("\n");
	return AssimpCmdError::Success;
}