61 lines
1.2 KiB
Go
61 lines
1.2 KiB
Go
//go:build example
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// +build example
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package system
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import (
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"code.rocketnine.space/tslocum/gohan"
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"code.rocketnine.space/tslocum/gohan/examples/twinstick/component"
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"github.com/hajimehoshi/ebiten/v2"
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)
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type movementInputSystem struct {
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player gohan.Entity
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}
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func NewMovementInputSystem(player gohan.Entity) *movementInputSystem {
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return &movementInputSystem{
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player: player,
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}
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}
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func (s *movementInputSystem) Components() []gohan.ComponentID {
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return []gohan.ComponentID{
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component.VelocityComponentID,
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component.WeaponComponentID,
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}
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}
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func (s *movementInputSystem) Update(ctx *gohan.Context) error {
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velocity := component.Velocity(ctx)
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if ebiten.IsKeyPressed(ebiten.KeyA) {
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velocity.X -= 0.5
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if velocity.X < -5 {
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velocity.X = -5
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}
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}
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if ebiten.IsKeyPressed(ebiten.KeyD) {
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velocity.X += 0.5
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if velocity.X > 5 {
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velocity.X = 5
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}
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}
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if ebiten.IsKeyPressed(ebiten.KeyW) {
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velocity.Y -= 0.5
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if velocity.Y < -5 {
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velocity.Y = -5
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}
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}
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if ebiten.IsKeyPressed(ebiten.KeyS) {
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velocity.Y += 0.5
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if velocity.Y > 5 {
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velocity.Y = 5
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}
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}
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return nil
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}
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func (s *movementInputSystem) Draw(ctx *gohan.Context, _ *ebiten.Image) error {
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return gohan.ErrSystemWithoutDraw
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}
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