https://www.khronos.org/registry/vulkan/specs/1.0/man/html/VkVertexInputBindingDescription.htmlbindingisthebindingnumberthatthisstructuredescribes.我不确定这意味着什么，例如https://github.com/SaschaWillems/Vulkan/blob/master/triangle/triangle.cpp#defineVERTEX_BUFFER_BIND_ID0....vertices.inputAttributes[0].bi