52 lines
1.1 KiB
Go
52 lines
1.1 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/asset"
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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 drawPlayerSystem struct {
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player gohan.Entity
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op *ebiten.DrawImageOptions
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}
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func NewDrawPlayerSystem(player gohan.Entity) *drawPlayerSystem {
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return &drawPlayerSystem{
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player: player,
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op: &ebiten.DrawImageOptions{},
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}
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}
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func (s *drawPlayerSystem) Name() string {
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return "DrawPlayer"
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}
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func (s *drawPlayerSystem) Needs() []gohan.ComponentID {
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return []gohan.ComponentID{
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component.PositionComponentID,
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component.WeaponComponentID,
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}
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}
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func (s *drawPlayerSystem) Uses() []gohan.ComponentID {
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return nil
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}
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func (s *drawPlayerSystem) Update(_ *gohan.Context) error {
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return gohan.ErrSystemWithoutUpdate
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}
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func (s *drawPlayerSystem) Draw(ctx *gohan.Context, screen *ebiten.Image) error {
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position := component.Position(ctx)
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s.op.GeoM.Reset()
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s.op.GeoM.Translate(position.X-16, position.Y-16)
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screen.DrawImage(asset.ImgWhiteSquare, s.op)
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return nil
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}
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