You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
60 lines
1.2 KiB
60 lines
1.2 KiB
//go:build example |
|
// +build example |
|
|
|
package system |
|
|
|
import ( |
|
"code.rocketnine.space/tslocum/gohan" |
|
"code.rocketnine.space/tslocum/gohan/examples/twinstick/component" |
|
"github.com/hajimehoshi/ebiten/v2" |
|
) |
|
|
|
type movementInputSystem struct { |
|
player gohan.Entity |
|
} |
|
|
|
func NewMovementInputSystem(player gohan.Entity) *movementInputSystem { |
|
return &movementInputSystem{ |
|
player: player, |
|
} |
|
} |
|
|
|
func (s *movementInputSystem) Components() []gohan.ComponentID { |
|
return []gohan.ComponentID{ |
|
component.VelocityComponentID, |
|
component.WeaponComponentID, |
|
} |
|
} |
|
|
|
func (s *movementInputSystem) Update(ctx *gohan.Context) error { |
|
velocity := component.Velocity(ctx) |
|
if ebiten.IsKeyPressed(ebiten.KeyA) { |
|
velocity.X -= 0.5 |
|
if velocity.X < -5 { |
|
velocity.X = -5 |
|
} |
|
} |
|
if ebiten.IsKeyPressed(ebiten.KeyD) { |
|
velocity.X += 0.5 |
|
if velocity.X > 5 { |
|
velocity.X = 5 |
|
} |
|
} |
|
if ebiten.IsKeyPressed(ebiten.KeyW) { |
|
velocity.Y -= 0.5 |
|
if velocity.Y < -5 { |
|
velocity.Y = -5 |
|
} |
|
} |
|
if ebiten.IsKeyPressed(ebiten.KeyS) { |
|
velocity.Y += 0.5 |
|
if velocity.Y > 5 { |
|
velocity.Y = 5 |
|
} |
|
} |
|
return nil |
|
} |
|
|
|
func (s *movementInputSystem) Draw(ctx *gohan.Context, _ *ebiten.Image) error { |
|
return gohan.ErrSystemWithoutDraw |
|
}
|
|
|