mirror of
https://github.com/OpenDiablo2/OpenDiablo2
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103 lines
3.3 KiB
Go
103 lines
3.3 KiB
Go
package d2components
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import (
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"github.com/OpenDiablo2/OpenDiablo2/d2common/d2math/d2vector"
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"github.com/gravestench/akara"
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)
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// static check that StaticPositionComponent implements Component
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var _ akara.Component = &StaticPositionComponent{}
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// static check that StaticPositionMap implements ComponentMap
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var _ akara.ComponentMap = &StaticPositionMap{}
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// StaticPositionComponent is a component that contains an embedded position struct.
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// StaticPosition is used for positions that do not change with camera position (like ui overlay)
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type StaticPositionComponent struct {
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*d2vector.Position
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}
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// ID returns a unique identifier for the component type
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func (*StaticPositionComponent) ID() akara.ComponentID {
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return StaticPositionCID
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}
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// NewMap returns a new component map for the component type
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func (*StaticPositionComponent) NewMap() akara.ComponentMap {
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return NewStaticPositionMap()
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}
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// StaticPosition is a convenient reference to be used as a component identifier
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var StaticPosition = (*StaticPositionComponent)(nil) // nolint:gochecknoglobals // global by design
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// NewStaticPositionMap creates a new map of entity ID's to StaticPosition
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func NewStaticPositionMap() *StaticPositionMap {
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cm := &StaticPositionMap{
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components: make(map[akara.EID]*StaticPositionComponent),
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}
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return cm
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}
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// StaticPositionMap is a map of entity ID's to StaticPosition
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type StaticPositionMap struct {
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world *akara.World
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components map[akara.EID]*StaticPositionComponent
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}
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// Init initializes the component map with the given world
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func (cm *StaticPositionMap) Init(world *akara.World) {
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cm.world = world
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}
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// ID returns a unique identifier for the component type
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func (*StaticPositionMap) ID() akara.ComponentID {
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return StaticPositionCID
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}
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// NewMap returns a new component map for the component type
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func (*StaticPositionMap) NewMap() akara.ComponentMap {
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return NewStaticPositionMap()
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}
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// Add a new StaticPositionComponent for the given entity id, return that component.
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// If the entity already has a component, just return that one.
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func (cm *StaticPositionMap) Add(id akara.EID) akara.Component {
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if com, has := cm.components[id]; has {
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return com
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}
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position := d2vector.NewPosition(0, 0)
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cm.components[id] = &StaticPositionComponent{Position: &position}
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cm.world.UpdateEntity(id)
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return cm.components[id]
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}
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// AddStaticPosition adds a new StaticPositionComponent for the given entity id and returns it.
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// If the entity already has a file type component, just return that one.
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// this is a convenience method for the generic Add method, as it returns a
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// *StaticPositionComponent instead of an akara.Component
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func (cm *StaticPositionMap) AddStaticPosition(id akara.EID) *StaticPositionComponent {
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return cm.Add(id).(*StaticPositionComponent)
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}
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// Get returns the component associated with the given entity id
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func (cm *StaticPositionMap) Get(id akara.EID) (akara.Component, bool) {
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entry, found := cm.components[id]
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return entry, found
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}
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// GetStaticPosition returns the StaticPositionComponent associated with the given entity id
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func (cm *StaticPositionMap) GetStaticPosition(id akara.EID) (*StaticPositionComponent, bool) {
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entry, found := cm.components[id]
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return entry, found
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}
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// Remove a component for the given entity id, return the component.
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func (cm *StaticPositionMap) Remove(id akara.EID) {
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delete(cm.components, id)
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cm.world.UpdateEntity(id)
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}
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