Assimp没有正确加载索引 [英] Assimp not properly loading indices
本文介绍了Assimp没有正确加载索引的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
我正在尝试加载简单的3d模型cube.3ds,但是会发生下一个错误:当我读取向量的索引时,向量包含:[0、1、2、3,...].这不正确.我发现了几乎相同的主题: Assimp和D3D模型加载:网格未在D3D中显示,但是我没有找到答案.任何人都可以正确地详细描述从网格加载索引的算法.非常感谢!
I'm trying to load simple 3d model cube.3ds, but next error occurs: when I read indices to my vector, vector contains: [0, 1, 2, 3, ...]. It's not properly. I found almost the same topic: Assimp and D3D model loading: Mesh not being displayed in D3D, but I don't found the answer. Can anyone describe in detail properly algorithm for loading indices from meshes. Thank's a lot!
推荐答案
以下是访问网格索引时从assimp示例代码中提取的示例.
Here is a example pulled from the assimp sample code on accessing the mesh indices.
for (; n < nd->mNumMeshes; ++n)
{
const struct aiMesh* mesh = scene->mMeshes[nd->mMeshes[n]];
apply_material(sc->mMaterials[mesh->mMaterialIndex]);
if(mesh->mNormals == NULL) {
glDisable(GL_LIGHTING);
} else {
glEnable(GL_LIGHTING);
}
for (t = 0; t < mesh->mNumFaces; ++t) {
const struct aiFace* face = &mesh->mFaces[t];
GLenum face_mode;
switch(face->mNumIndices) {
case 1: face_mode = GL_POINTS; break;
case 2: face_mode = GL_LINES; break;
case 3: face_mode = GL_TRIANGLES; break;
default: face_mode = GL_POLYGON; break;
}
glBegin(face_mode);
for(i = 0; i < face->mNumIndices; i++) {
int index = face->mIndices[i];
if(mesh->mColors[0] != NULL)
glColor4fv((GLfloat*)&mesh->mColors[0][index]);
if(mesh->mNormals != NULL)
glNormal3fv(&mesh->mNormals[index].x);
glVertex3fv(&mesh->mVertices[index].x);
}
glEnd();
}
}
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