setVertexAmplificationCount(_:)
Sets the vertex amplification count and its view mapping for each amplification ID.
Declaration
func setVertexAmplificationCount(_ count: Int)Parameters
- count:
The number of outputs to create. The maximum value is
2.
Discussion
Each view mapping element describes how to route the corresponding amplification ID to a specific viewport and render target array index by using offsets from the base array index provided by the [[ render_target_array_index ]] and/or [[ viewport_array_index ]] output attributes in the vertex shader. This allows Metal to route each amplified vertex to a different [[ render_target_array_index ]] and [[ viewport_array_index ]], even though you can’t directly amplify these attributes.