42 lines
872 B
Go
42 lines
872 B
Go
package system
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import (
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"code.rocketnine.space/tslocum/brownboxbatman/component"
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"code.rocketnine.space/tslocum/brownboxbatman/world"
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"code.rocketnine.space/tslocum/gohan"
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"github.com/hajimehoshi/ebiten/v2"
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)
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type RailSystem struct {
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}
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func NewRailSystem() *RailSystem {
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s := &RailSystem{}
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return s
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}
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func (_ *RailSystem) Needs() []gohan.ComponentID {
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return []gohan.ComponentID{
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component.RailComponentID,
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component.PositionComponentID,
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}
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}
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func (_ *RailSystem) Uses() []gohan.ComponentID {
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return nil
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}
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func (s *RailSystem) Update(ctx *gohan.Context) error {
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if !world.World.GameStarted || world.World.GameOver || !world.World.CamMoving {
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return nil
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}
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position := component.Position(ctx)
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position.Y -= CameraMoveSpeed
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return nil
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}
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func (_ *RailSystem) Draw(_ *gohan.Context, screen *ebiten.Image) error {
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return gohan.ErrSystemWithoutDraw
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}
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