Draw a triangle with GDNative?

ron

I asked this on reddit and made some head way but I am still unable to see the triangle when running. The mesh is added to the scene when executed and a print statement in the GDNative code prints out. I suspect that the material is not being applied to the mesh but it could be something else. Thanks for the help. Here is the code:

Godot::print("Working");

MeshInstance *meshInstance = MeshInstance::_new();
ArrayMesh *arrayMesh = ArrayMesh::_new();
SurfaceTool *surfaceTool = SurfaceTool::_new();
SpatialMaterial *material = SpatialMaterial::_new();

meshInstance->translate(Vector3(0, 0, 0));
material->set_albedo(Color(255/255, 144/255, 144/255, 255/255));
material->set_specular_mode(material->FLAG_UNSHADED);
material->set_cull_mode(material->CULL_DISABLED);
meshInstance->set_material_override(material);
meshInstance->set_name("Tri");

surfaceTool->begin(Mesh::PRIMITIVE_TRIANGLES);
surfaceTool->add_uv(Vector2(0, 0));
surfaceTool->add_vertex(Vector3(-10.0, -10.0, 0.0));
surfaceTool->add_uv(Vector2(0.5, 1));
surfaceTool->add_vertex(Vector3(0.0, 10.0, 0.0));
surfaceTool->add_uv(Vector2(1, 0));
surfaceTool->add_vertex(Vector3(10.0, -10.0, 0.0));
surfaceTool->generate_normals();
surfaceTool->index();
surfaceTool->commit(arrayMesh);
meshInstance->set_mesh(arrayMesh);
add_child(meshInstance);

lawnjelly

Bit of an old post, but I've done much the same in gdscript and it has worked:

var tmpMesh = Mesh.new()
var vertices = []
var norms = []
var UVs = []

# my premade material
var mat = Scene.m_Mat_Terrain0

# fill the verts, norms, uvs
# NOT SHOWN

var st = SurfaceTool.new()
st.begin(Mesh.PRIMITIVE_TRIANGLES)
st.set_material(mat)

for v in vertices.size(): 
	st.add_normal(norms[v])
	st.add_uv(UVs[v])
	st.add_vertex(vertices[v])

st.commit(tmpMesh)

$MeshInstance.mesh = tmpMesh

I didn't call index(). I would double check that the object is in view and that it is just not rendering because it is out of view. Also possible that the bounds are somehow invalid and it is getting culled before drawing...