a7bb9496ae
Vanilla-faithful overworld generator (final_density + multi-noise biomes), full connection lifecycle (status/login/configuration/play), chunk streaming, creative block editing, and the protocol/nbt/registry infrastructure.
38 lines
998 B
Go
38 lines
998 B
Go
package world
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import (
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_ "embed"
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"encoding/json"
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"fmt"
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"strconv"
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)
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//go:embed item_blocks.json
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var itemBlocksJSON []byte
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// itemToBlock maps an item's network ID to the default block state placed when
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// that item is used. Built from the item registry crossed with block defaults
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// (items whose name is a block). Items with no block (tools, food) are absent.
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var itemToBlock map[int32]uint16
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func init() {
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raw := make(map[string]int)
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if err := json.Unmarshal(itemBlocksJSON, &raw); err != nil {
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panic(fmt.Sprintf("world: parsing item_blocks.json: %v", err))
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}
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itemToBlock = make(map[int32]uint16, len(raw))
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for k, v := range raw {
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id, err := strconv.Atoi(k)
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if err != nil {
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panic(fmt.Sprintf("world: bad item id %q: %v", k, err))
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}
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itemToBlock[int32(id)] = uint16(v)
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}
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}
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// ItemToBlock returns the block state placed by an item, and whether the item
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// is a placeable block.
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func ItemToBlock(itemID int32) (uint16, bool) {
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s, ok := itemToBlock[itemID]
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return s, ok
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}
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