diff options
Diffstat (limited to 'tilemap.go')
| -rw-r--r-- | tilemap.go | 16 |
1 files changed, 10 insertions, 6 deletions
@@ -10,7 +10,7 @@ import ( type Tilemap struct { tilesImage *ebiten.Image - surface *ebiten.Image + surfaces []*ebiten.Image mapWidth int tileSize int layers [][]int @@ -27,25 +27,31 @@ func (* Tilemap) Update() error { return nil } -func (tm * Tilemap) Draw(screen *ebiten.Image) { +func (tm * Tilemap) Draw(screen *ebiten.Image, x, y float32) { + for _, surf := range tm.surfaces { + ShadowDraw(screen, surf, x, y, 1.0) + } } func (tm *Tilemap) UpdateSurface() { w := tm.tilesImage.Bounds().Dx() tileXCount := w / tileSize + tm.surfaces = make([]*ebiten.Image, len(tm.layers)) + // Draw each tile with each DrawImage call. // As the source images of all DrawImage calls are always same, // this rendering is done very efficiently. // For more detail, see https://pkg.go.dev/github.com/hajimehoshi/ebiten/v2#Image.DrawImage - for _, l := range tm.layers { + for idx, l := range tm.layers { + tm.surfaces[idx] = ebiten.NewImage(tm.mapWidth*tm.tileSize, len(l)/tm.mapWidth*tm.tileSize) for i, t := range l { op := &ebiten.DrawImageOptions{} op.GeoM.Translate(float64((i%tm.mapWidth)*tm.tileSize), float64((i/tm.mapWidth)*tm.tileSize)) sx := (t % tileXCount) * tileSize sy := (t / tileXCount) * tileSize - tm.surface.DrawImage(tm.tilesImage.SubImage(image.Rect(sx, sy, sx+tileSize, sy+tileSize)).(*ebiten.Image), op) + tm.surfaces[idx].DrawImage(tm.tilesImage.SubImage(image.Rect(sx, sy, sx+tileSize, sy+tileSize)).(*ebiten.Image), op) } } @@ -60,8 +66,6 @@ func NewTilemap(layers [][]int, mapWidth int) Tilemap { tilemap.layers = layers - tilemap.surface = ebiten.NewImage(mapWidth*tilemap.tileSize, len(layers[0])/mapWidth*tilemap.tileSize) - var err error tilemap.tilesImage = tilesImage |