Problem in importing saba as a library

[kaaass]

Hi, I'm trying importing saba to my own OpenGL project. I followed the instruction in wiki, and the code in simple_mmd_viewer_glfw.cpp. But I could only get a twisted model, which I had no idea why.

Here is my model class: pastebin The rest program is like:

mmdModel = new MmdModel("pmx", "vmd");
mmdModel->init();
while (1) {
    mmdModel->draw(mmdShader);
    mmdModel->idle(deltaTime);
}

I also noticed that changing m_mmdModel->GetUpdatePositions() to m_mmdModel->GetPositions() would make the model renderred properly but with no animation.

Any help will be appreciated. And thanks for developing this fantastic repo since assimp only support poor pmx feature.

[benikabocha]

The code looks fine.

• Is it possible to check the result of that drawing?
• Is it possible to draw without assigning a VMD?

[kaaass]

The drawing result is like this snapshot.

I tried to disable VMD by commenting these lines, but it seems helpless.

auto anim = std::make_unique<saba::VMDAnimation>();
anim->Create(m_mmdModel);
// saba::VMDFile vmdFile;
// saba::ReadVMDFile(&vmdFile, animPath.c_str());
// anim->Add(vmdFile);
anim->SyncPhysics(0.0f);
m_vmdAnim = std::move(anim);

However, as I extracted the logic about MMD model to a single project, the way of model twists got changed. And it works properly as I commented these lines.

void MmdModel::draw(Shader *shader) {
    Lighting::getDefault()->useShader(shader);

    // Model, view, projection matrix
    glm::mat4 projection;
    auto &screen = Game::getInstance()->screen;
    auto camera = Game::curStage()->getCamera();
    projection = glm::perspective(glm::radians(camera->zoom), (float) screen.width / (float) screen.height, 0.1f,
                                  100.0f);
    glm::mat4 view = camera->getViewMatrix();
    glm::mat4 modelMat = glm::mat4(1.0f);
    // modelMat = glm::translate(modelMat, glm::vec3{0, 0, 3});
    // modelMat = glm::scale(modelMat, glm::vec3(1.0 / 6));

    // ...
}

But this solution doesn't work in my full project. I had no idea with the problem and its solution. I guess it might relate to some weird memory issues, but valgrind gives nothing helped. Here is the extracted code, tested under Linux kaaass-pc 5.4.80-1-MANJARO #1 SMP PREEMPT Tue Nov 24 18:57:09 UTC 2020 x86_64 GNU/Linux. 3dg_demo.tar.gz

Anyway, thanks to your reply. Sorry for the long content.

[benikabocha]

I also built and tested it and had no problems. Commenting out the following line did not cause any problems.

    // modelMat = glm::translate(modelMat, glm::vec3{0, 0, 3});
    // modelMat = glm::scale(modelMat, glm::vec3(1.0 / 6));

Environment:

• Arch Linux
• Windows 10

Is the version of glm the same as the saba library?

[kaaass]

I tried to compile using the glm under saba/external/glm, and every problem got solved. Thanks again for your help.