58 lines
1.3 KiB
Go
58 lines
1.3 KiB
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/entity"
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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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const (
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fireSpeed = 1.5
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)
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type playerFireSystem struct {
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}
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func NewplayerFireSystem() *playerFireSystem {
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return &playerFireSystem{}
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}
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func (_ *playerFireSystem) Needs() []gohan.ComponentID {
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return []gohan.ComponentID{
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component.PositionComponentID,
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component.VelocityComponentID,
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component.WeaponComponentID,
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component.SpriteComponentID,
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}
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}
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func (_ *playerFireSystem) Uses() []gohan.ComponentID {
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return nil
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}
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func (s *playerFireSystem) Update(ctx *gohan.Context) error {
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if world.World.GameOver {
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return nil
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}
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position := component.Position(ctx)
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weapon := component.Weapon(ctx)
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if ebiten.IsKeyPressed(ebiten.KeyZ) || ebiten.IsMouseButtonPressed(ebiten.MouseButtonLeft) {
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if weapon.NextFire == 0 {
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entity.NewPlayerBullet(position.X-8, position.Y-8, 0, -weapon.BulletSpeed)
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entity.NewPlayerBullet(position.X+8, position.Y-8, 0, -weapon.BulletSpeed)
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weapon.NextFire = weapon.FireRate
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}
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}
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if weapon.NextFire > 0 {
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weapon.NextFire--
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}
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return nil
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}
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func (s *playerFireSystem) Draw(_ *gohan.Context, _ *ebiten.Image) error {
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return gohan.ErrSystemWithoutDraw
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}
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