mirror of
https://github.com/OpenDiablo2/OpenDiablo2
synced 2025-02-11 02:58:10 -05:00
3f5d2c0938
* component ID's are dynamically allocated now * removed `akara.BaseComponent` member from components * component declarations drastically reduced
47 lines
1.5 KiB
Go
47 lines
1.5 KiB
Go
//nolint:dupl,golint,stylecheck // component declarations are supposed to look the same
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package d2components
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import (
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"github.com/gravestench/akara"
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"github.com/OpenDiablo2/OpenDiablo2/d2common/d2math/d2vector"
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)
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// static check that Origin implements Component
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var _ akara.Component = &Origin{}
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// Origin is a component that describes the origin point of an entity as a vector.
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// The values should be interpreted as normalized to the width/height of the entity (depends on other components...).
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// For example, origin (0,0) should be top-left corner, (0.5, 0.5) should be center.
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type Origin struct {
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*d2vector.Vector
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}
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// New creates a new Origin. By default, the origin is the top-left corner (0,0)
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func (*Origin) New() akara.Component {
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return &Origin{
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Vector: d2vector.NewVector(0, 0),
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}
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}
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// OriginFactory is a wrapper for the generic component factory that returns Origin component instances.
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// This can be embedded inside of a system to give them the methods for adding, retrieving, and removing a Origin.
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type OriginFactory struct {
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Origin *akara.ComponentFactory
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}
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// AddOrigin adds a Origin component to the given entity and returns it
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func (m *OriginFactory) AddOrigin(id akara.EID) *Origin {
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return m.Origin.Add(id).(*Origin)
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}
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// GetOrigin returns the Origin component for the given entity, and a bool for whether or not it exists
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func (m *OriginFactory) GetOrigin(id akara.EID) (*Origin, bool) {
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component, found := m.Origin.Get(id)
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if !found {
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return nil, found
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}
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return component.(*Origin), found
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}
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