ichigo/engine/tiles.go

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package engine
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import (
"image"
"github.com/hajimehoshi/ebiten/v2"
)
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type Tilemap struct {
Map [][]int
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Src *ebiten.Image // must be a horizontal tile set
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TileSize int
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GeoM ebiten.GeoM
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ZPos
}
func (t *Tilemap) Draw(screen *ebiten.Image) {
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for j, row := range t.Map {
for i, tile := range row {
var op ebiten.DrawImageOptions
op.GeoM.Translate(float64(i*t.TileSize), float64(j*t.TileSize))
op.GeoM.Concat(t.GeoM)
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sx := tile * t.TileSize
src := t.Src.SubImage(image.Rect(sx, 0, sx+t.TileSize, t.TileSize)).(*ebiten.Image)
screen.DrawImage(src, &op)
}
}
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}