No Accessible Mesh

[SpiderPig]

I can't figure this one out.  I was playing around with exporting from Blender and it displays on screen but only shows 1 LOD and no meshes for that LOD.  It's worth mentioning it has no materials or images, not sure why that'd make a difference though.

 

EDIT :  It might be the newer GLTF export in blender.  The files that work are with "Khronos glTF Blender I/O v1.4.40" and the ones I've uploaded that don't work are "Khronos glTF Blender I/O v3.6.27".

#include "UltraEngine.h"
#include "Components/Mover.hpp"

using namespace UltraEngine;


int main(int argc, const char* argv[])
{
    auto displays = GetDisplays();
    auto window = CreateWindow("Ultra Engine", 0, 0, 1280, 720, displays[0], WINDOW_CENTER | WINDOW_TITLEBAR);
    auto world = CreateWorld();

    //Create a framebuffer
    auto framebuffer = CreateFramebuffer(window);

    //Create a camera
    auto camera = CreateCamera(world);
    camera->SetClearColor(0.125);
    camera->SetFov(70);
    camera->SetPosition(0, 5, -8);

    //Create a light
    auto light = CreateBoxLight(world);
    light->SetRotation(35, 45, 0);
    light->SetRange(-10, 10);

    auto model = LoadModel(world, "Models\\PineLarge_001.gltf");

    //Only one LOD and no meshes.
    //Output says LOD_1 was loaded but then deleted

    int l = 0;
    for (auto lod : model->lods) {
        auto m = 0;
        for (auto mesh : lod->meshes) {
            Notify("lod : " + String(l) + ", mesh : " + String(m), "");
            m++;
        }
        l++;
    }

    //Main loop
    while (window->Closed() == false and window->KeyDown(KEY_ESCAPE) == false)
    {
        world->Update();
        world->Render(framebuffer);
    }
    return 0;
}

 

PineLarge.zip

[Josh]

Did you open this in the model viewer? Maybe there is an extra node in the hierarchy?

[SpiderPig]

I didn't I loaded it straight into my project.  I also compared it to other similar files that work and it seemed to be the same.  Hard to tell really.

[SpiderPig]

The bufferViews in the .gltf part have an extra parameter called "target", so maybe the bin data is different too?

[SpiderPig]

I loaded this into the model viewer and re-saved it from there.  In C++ it still says only 1 LOD is available and it has a mesh size of 0.  Even though the output says it loaded the other LOD and it renders perfectly.

[Josh]

It looks like branches and leaves are two separate children:

    int l = 0;
    for (int n = 0; n < model->kids.size(); ++n)
    {
        for (auto lod : model->kids[n]->As<Model>()->lods) {
            auto m = 0;
            for (auto mesh : lod->meshes) {
                Notify("lod : " + String(l) + ", mesh : " + String(m), "");
                m++;
            }
            l++;
        }
    }

 

[SpiderPig]

Ah yes they are.  One has to be parented to the other I think.