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>

constexpr 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";


// 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.
#ifdef _WIN32
constexpr char TREE_BRANCH_ASCII[] = "|-";
constexpr char TREE_STOP_ASCII[] = "'-";
constexpr char TREE_CONTINUE_ASCII[] = "| ";

const char *TREE_BRANCH = TREE_BRANCH_ASCII;
const char *TREE_STOP = TREE_STOP_ASCII;
const char *TREE_CONTINUE = TREE_CONTINUE_ASCII;
#else  // _WIN32
constexpr char TREE_BRANCH_UTF8[] = "\xe2\x94\x9c\xe2\x95\xb4";
constexpr char TREE_STOP_UTF8[] = "\xe2\x94\x94\xe2\x95\xb4";
constexpr char TREE_CONTINUE_UTF8[] = "\xe2\x94\x82 ";

const char *TREE_BRANCH = TREE_BRANCH_UTF8;
const char *TREE_STOP = TREE_STOP_UTF8;
const char *TREE_CONTINUE = TREE_CONTINUE_UTF8;
#endif  // _WIN32

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

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

    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 forbidden. ");
        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
    if (scene->mNumMaterials)
        printf("\nNamed Materials:");
    for (unsigned int i = 0; i < scene->mNumMaterials; ++i) {
        const aiMaterial *mat = scene->mMaterials[i];
        aiString name = mat->GetName();
        printf("\n    \'%s\'", name.data);
        if (mat->mNumProperties)
            printf(" (prop) [index / bytes | texture semantic]");
        for (unsigned p = 0; p < mat->mNumProperties; p++) {
            const aiMaterialProperty *prop = mat->mProperties[p];
            const aiTextureType textype = static_cast<aiTextureType>(prop->mSemantic);
            printf("\n        %d (%s): [%d / %d | %s]",
                    p,
                    prop->mKey.data,
                    prop->mIndex,
                    prop->mDataLength,
                    aiTextureTypeToString(textype));
        }
    }
    if (scene->mNumMaterials) {
        printf("\n");
    }

    // textures
    unsigned int 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;
}