entity

Documentation

Index

• Constants
• func AddComp(e *Entity, c Comp)
• func GetAllCompOfType[T Comp](e *Entity) (out []T)
• func GetComp[T Comp](e *Entity) (out T)
• func GetFlags(id uint64) byte
• func GetGeneration(id uint64) byte
• func GetIndex(id uint64) uint64
• func NewEntityId(generation, flags byte, index uint64) uint64
• type Comp
• type Entity
  • func (e *Entity) HasFlag(ef EntityFlag) bool
• type EntityFlag
• type Registry
  • func NewRegistry(size uint32) *Registry
  • func (r *Registry) FreeEntity(id uint64)
  • func (r *Registry) GetEntity(id uint64) *Entity
  • func (r *Registry) NewEntity() *Entity

Constants

const (
	GenerationShiftBits = 64 - 8
	FlagsShiftBits      = 64 - 16
	IndexBitMask        = 0x00_00_FFFF_FFFF_FFFF
)

Functions

func AddComp

func AddComp(e *Entity, c Comp)

func GetAllCompOfType

func GetAllCompOfType[T Comp](e *Entity) (out []T)

func GetComp

func GetComp[T Comp](e *Entity) (out T)

func GetFlags

func GetFlags(id uint64) byte

func GetGeneration

func GetGeneration(id uint64) byte

func GetIndex

func GetIndex(id uint64) uint64

func NewEntityId

func NewEntityId(generation, flags byte, index uint64) uint64

Types

type Comp

type Comp interface {
	Name() string
}

type Entity

type Entity struct {

	// Byte 1: Generation; Byte 2: Flags; Bytes 3-8: Index
	ID    uint64
	Comps []Comp
}

func (*Entity) HasFlag

func (e *Entity) HasFlag(ef EntityFlag) bool

type EntityFlag

type EntityFlag byte

const (
	EntityFlag_Unknown EntityFlag = 0
	EntityFlag_Dead    EntityFlag = 1 << (iota - 1)
	EntityFlag_Alive
)

type Registry

type Registry struct {
	EntityCount uint64
	Entities    []Entity
	FreeList    *freeListitem
}

func NewRegistry

func NewRegistry(size uint32) *Registry

func (*Registry) FreeEntity

func (r *Registry) FreeEntity(id uint64)

func (*Registry) GetEntity

func (r *Registry) GetEntity(id uint64) *Entity

func (*Registry) NewEntity

func (r *Registry) NewEntity() *Entity