Assimp简单使用

2024-05-02 01:44

文章标签 简单使用 assimp

本文主要是介绍Assimp简单使用，希望对大家解决编程问题提供一定的参考价值，需要的开发者们随着小编来一起学习吧！

记录一下assimp的简单使用，下面的ImportModel函数把相应的注释去掉可以拿到模型的mesh、vertex、face、material的属性。有关函数的API推荐去查询：

Assimp v3.0 (July 2012)

#include <iostream>
#include <assimp/Importer.hpp>
#include <assimp/scene.h>
#include <assimp/postprocess.h>
using namespace std;
#define print(x) cout << x << endl
#define print2D(v) cout << "(" << v[0] << ", " << v[1] << ")"
#define print3D(v) cout << "(" << v[0] << ", " << v[1] << ", " << v[2] << ")"
#define printColor3D(v) cout << "(" << v.r << ", " << v.g << ", " << v.b << ")"
void ImportModel(const std::string &path) //path是路径
{// Create an instance of the Importer classAssimp::Importer importer;const aiScene* scene = importer.ReadFile(path,aiProcess_CalcTangentSpace |aiProcess_Triangulate |aiProcess_JoinIdenticalVertices |aiProcess_SortByPType);// If the import failed, report itif (!scene){std::cout << "import error!" << std::endl;}std::cout << "import success!" << std::endl;/* mesh// 打印meshint meshNum = scene->mNumMeshes;print(meshNum);// 打印mesh的名字for (int i = 0; i < meshNum; ++i){aiMesh* mesh = scene->mMeshes[i];print(mesh->mName.C_Str());}*//*vertex// 打印指定mesh的顶点数aiMesh* mesh = scene->mMeshes[0];int numVertex = mesh->mNumVertices;print(numVertex);//打印指定mesh的顶点属性for (int i = 0; i < numVertex; ++i){cout << i << ": ";print3D(mesh->mVertices[i]); // 顶点坐标cout << "\t";print3D(mesh->mNormals[i]); // 法线坐标cout << "\t";if (mesh->HasVertexColors(0)){printColor3D(mesh->mColors[0][i]); // 顶点颜色cout << "\t";}print2D(mesh->mTextureCoords[0][i]); // 纹理坐标print("");}*//*facesaiMesh* mesh = scene->mMeshes[0];int numFaces = mesh->mNumFaces;//打印面数print(numFaces);for (int i = 0; i < numFaces; ++i){aiFace faces = mesh->mFaces[i];cout << i << ": (";for (int j = 0; j < faces.mNumIndices; ++j){cout << faces.mIndices[j] << ",";// 打印顶点索引}print(")");}*//*material//是否有材质print(scene->HasMaterials());int numMaterials = scene->mNumMaterials;//打印材质的数量print(numMaterials);for (int i = 0; i < numMaterials; ++i){aiMaterial* material = scene->mMaterials[i];aiString path;//print(material->GetName().C_Str());//材质名字material->GetTexture(aiTextureType_DIFFUSE, 0, &path);string pathRel = path.C_Str();if (pathRel.find_first_of("\\") != std::string::npos)print(pathRel.substr(pathRel.find_last_of("\\") + 1));elseprint(pathRel);}*/
}