displays

type Builder interface {
	Create() Builder
	WithID(id *uuid.UUID) Builder
	WithIndex(index uint) Builder
	WithViewport(viewport viewports.Viewport) Builder
	WithCamera(cam cameras.Camera) Builder
	WithMaterial(mat materials.Material) Builder
	Now() (Display, error)
}

type Display interface {
	ID() *uuid.UUID
	Index() uint
	Viewport() viewports.Viewport
	Camera() cameras.Camera
	HasMaterial() bool
	Material() materials.Material
}