assimp输出节点数据
时间: 2023-12-14 18:37:09 浏览: 28
Assimp是一个非常流行的开源模型导入库,可以读取多种3D模型格式。要输出Assimp中的节点数据,您需要使用Assimp导入模型并遍历其节点树。以下是一个简单的示例,演示如何输出模型中每个节点的名称和变换矩阵:
```c++
#include <iostream>
#include <assimp/Importer.hpp>
#include <assimp/scene.h>
#include <assimp/postprocess.h>
void printNodeData(const aiNode* node, const aiMatrix4x4& parentTransform)
{
aiMatrix4x4 transform = parentTransform * node->mTransformation;
std::cout << "Node name: " << node->mName.C_Str() << std::endl;
std::cout << "Transform matrix:" << std::endl;
std::cout << transform.a1 << " " << transform.a2 << " " << transform.a3 << " " << transform.a4 << std::endl;
std::cout << transform.b1 << " " << transform.b2 << " " << transform.b3 << " " << transform.b4 << std::endl;
std::cout << transform.c1 << " " << transform.c2 << " " << transform.c3 << " " << transform.c4 << std::endl;
std::cout << transform.d1 << " " << transform.d2 << " " << transform.d3 << " " << transform.d4 << std::endl;
std::cout << std::endl;
for (unsigned int i = 0; i < node->mNumChildren; i++) {
printNodeData(node->mChildren[i], transform);
}
}
int main()
{
Assimp::Importer importer;
const aiScene* scene = importer.ReadFile("path/to/your/model", aiProcess_Triangulate | aiProcess_GenNormals);
if (!scene) {
std::cerr << "Failed to load model!" << std::endl;
return 1;
}
const aiNode* rootNode = scene->mRootNode;
aiMatrix4x4 identityTransform;
identityTransform.SetIdentity();
printNodeData(rootNode, identityTransform);
return 0;
}
```
在上面的示例中,`printNodeData`函数遍历节点树,并输出每个节点的名称和变换矩阵。在主函数中,我们使用Assimp导入模型,并将根节点传递给`printNodeData`函数。注意,在导入模型时,我们使用`aiProcess_Triangulate`和`aiProcess_GenNormals`标志进行预处理,以确保模型中的所有三角形都是三角形,而法线也被计算出来。
希望这可以帮助您了解如何在Assimp中输出节点数据。