vkCmdBindIndexBuffer

To bind an index buffer to a command buffer, call:

void vkCmdBindIndexBuffer(
    VkCommandBuffer commandBuffer,
    VkBuffer buffer,
    VkDeviceSize offset,
    VkIndexType indexType);

• commandBuffer is the command buffer into which the command is recorded.
• buffer is the buffer being bound.
• offset is the starting offset in bytes within buffer used in index buffer address calculations.
• indexType is a VkIndexType value specifying the size of the indices.

If the maintenance6 feature is enabled, buffer can be VK_NULL_HANDLE. If buffer is VK_NULL_HANDLE and the nullDescriptor feature is enabled, every index fetched results in a value of zero.