Is there any way to sort the entities?

[kirinzer]

I could set the priority to order the entities, but the range is limited(only cover [0,7]). Clearly, it is not the right way.
So I found the other.
Builder& blendOrder(size_t primitiveIndex, uint16_t order)
But this func looks like not work for me, nothing changes. it is confusing.
I use the OpenGL backend on the iOS platform.

[romainguy]

blendOrder() only works for entities that require blending (e.g. transparent objects). Could you describe what you are trying to do? Filament sorts the entities internally for performance and correctness already.

[romainguy]

You can't rely on the order in which they are added since we sort by depth. How do you set the z values? Sorting is done on the bounding boxes transformed by the entity's world transform.

[kirinzer]

TransformManager, I set z values for selected entity depend on the setTransform().

[romainguy]

Then check what your bounding boxes are. Btw drawing of opaque objects is front to back, so Z values closer to the camera will be first.

[kirinzer]

I am not sure how to check bounding boxes, and I create an entity like that below:

    RenderableManager::Builder(1)
    .material(0, matInstance)
    .geometry(0, TRIANGLES, vb, ib, 0, 6)
    .culling(false)
    .receiveShadows(false)
    .castShadows(false)
    .boundingBox(Box().set(Vec3f{-1,-1,-1}, Vec3f{1,1,1}))
    .build(engine, renderable);

Then set matrix for the entity:

    // tm is a TransformManager obj
    // originalMat is a Mat4, and z value is [0,-1], start from -1
    tm.setTransform(i, originalMat);
    // check  the  returned value, the z value is right
    Mat4 m = tm.getWorldTransform(i);

When next entity will be created:

    static float z = -1;
    originalMat = Matrix4();
    originalMat = originalMat.Translate(Vec3f{0,0,z});
    z = z + 0.1;

Am I missing something?

[kirinzer]

Find the real problem. My colleague had changed a container type in Scene.h

// modified code
    std::unordered_set<utils::Entity> mEntities;
// original code
    tsl::robin_set<utils::Entity> mEntities;