Lets say that I have different types of data like vertices, indices… and I want to transfer them by using just one staging buffer. Does buffer alignment cause problem, do I have to check whether their alignment requirements match or is it just fine to allocate total size of their memory and mapping them?

For example;

const s3DVertex vertices[4] = {
    {{-0.5f, -0.5f}, {1.0f, 0.0f, 0.0f}},
    {{0.5f, -0.5f}, {0.0f, 1.0f, 0.0f}},
    {{0.5f, 0.5f}, {0.0f, 0.0f, 1.0f}},
    {{-0.5f, 0.5f}, {1.0f, 1.0f, 1.0f}}
};

const uint16_t indices[6] = { 0, 1, 2, 2, 3, 0 };

void* data;
vkMapMemory(logicalDevice, stagingBufferMemory, 0, VK_WHOLE_SIZE, 0, &data);
memcpy(data, vertices, (size_t)(sizeof(s3DVertex) * 4));
memcpy(reinterpret_cast<void*>(reinterpret_cast<s3DVertex*>(data) + 4), indices, (size_t)(sizeof(uint16_t) * 6));
vkUnmapMemory(logicalDevice, stagingBufferMemory);

In this example, it works fine but I’m not sure if it works in all conditions?