creating custom meshes on runtime

[DelinWorks]

Hi! Can someone help me with this peace of code?

In this code i'm trying to render a custom runtime created mesh, firstly I set the vertex attributes and what not and then I fill the vertices array and then the index array, I then add that generated mesh to the sprite3d and a material program state and a texture to the sprite3d, I've tried everything but that sprite3d doesn't seem to be rendered at all no matter what I do, Any help would be appreciated 🙂

A black or textured triangle should show in the middle of the green and red lines, I even tried disabling depth testing and still nothing shows.

sp3d = Sprite3D::create();

int perVertexSizeInFloat = 8;  // 3+3+2

std::vector<float> vertices = {
    // Front Triangle 
    // Position         Normal          UV
       0,100,0,         1,1,1,          0,1,
       100,0,0,         1,1,1,          1,0,
       0,0,0,           1,1,1,          0,1,

    // Back Triangle
    // Position         Normal          UV
       0,0,0,           1,1,1,          0,1,
       100,0,0,         1,1,1,          1,0,
       0,100,0,         1,1,1,          0,1,
};

MeshData::IndexArray indices = { 0, 1, 2 };

std::vector<MeshVertexAttrib> attribs;
MeshVertexAttrib att;

att.type = backend::VertexFormat::FLOAT3;
att.vertexAttrib = shaderinfos::VertexKey::VERTEX_ATTRIB_POSITION;
attribs.push_back(att);

att.type = backend::VertexFormat::FLOAT3;
att.vertexAttrib = shaderinfos::VertexKey::VERTEX_ATTRIB_NORMAL;
attribs.push_back(att);

att.type = backend::VertexFormat::FLOAT2;
att.vertexAttrib = shaderinfos::VertexKey::VERTEX_ATTRIB_TEX_COORD;
attribs.push_back(att);

auto mat = Sprite3DMaterial::createBuiltInMaterial(Sprite3DMaterial::MaterialType::UNLIT, false);

auto mesh = Mesh::create(vertices, perVertexSizeInFloat, indices, attribs);
sp3d->addMesh(mesh);

sp3d->setMaterial(mat);
sp3d->setTexture("Untitled.png");

worldNode->addChild(sp3d, 10);

sp3d->setPosition3D(Vec3(0, 0, 0));

that's all called in init() function of the scene

What I discovered is that after creating a MeshData object and then passing vertex data and attribs to it and then I create a MeshVertexData using that MeshData the mesh index at 0 using getMeshIndexDataByIndex(0) doesn't seem to have any vertex data in it like in this picture

Maybe the vertex data has been uploaded to the GPU Memory and deleted from CPU Memory? I can't tell :(

I'm starting to suspect that the mesh creation process is faulty.

[DelinWorks]

Nevermind turns out it was a layering problem that setGlobalZOrder() didn't fix I had to force 2D queue for it to work.

[aismann]

@DelinWorks ,
maybe a nice demo on cpp-test?
Here it will be forgotten I belive.