chuckrector / mappo Goto Github PK

  if (state.selectedTileLayerIndex !== -1) {
    const layer = state.map.tileLayers[state.selectedTileLayerIndex]
    const tileWidth = tileset.tileWidth
    const tileHeight = tileset.tileHeight
    const scaleX = ~~(event.offsetX / scale)
    const scaleY = ~~(event.offsetY / scale)
    const parallaxX = ~~(state.camera.x * layer.parallax.x)
    const parallaxY = ~~(state.camera.y * layer.parallax.y)
    const x = scaleX - ((parallaxX + scaleX) % tileWidth)
    const y = scaleY - ((parallaxY + scaleY) % tileHeight)

    if (x !== state.highlightedMapTile.x || y !== state.highlightedMapTile.y) {
      store.dispatch({type: `HIGHLIGHT_MAP_TILE`, x, y})
    }
  }