//go:build gl

// 实体可视映射：实体类型 → 广告牌贴图键与高度（渲染.md §5.3）。
package main

import (
	"mc/internal/entity"
	"mc/internal/item"
)

// entityVisual 返回实体的贴图键与身高（米）。
// 动物按 ID 轮换四种外观（cow/pig/sheep/chicken）；掉落物用物品图标（0.3 米小广告牌）。
func entityVisual(e *entity.Entity, items *item.Registry) (key string, height float32) {
	switch e.Kind {
	case entity.KindZombie:
		return "entity/zombie/zombie", 1.95
	case entity.KindVillager:
		return "entity/villager/villager", 1.95
	case entity.KindAnimal:
		switch e.ID % 4 {
		case 0:
			return "entity/cow/cow_temperate", 1.4
		case 1:
			return "entity/pig/pig_temperate", 0.9
		case 2:
			return "entity/sheep/sheep", 1.3
		default:
			return "entity/chicken/chicken_temperate", 0.7
		}
	case entity.KindItemDrop:
		d, ok := e.Data.(*entity.Drop)
		if !ok || items == nil {
			return "", 0
		}
		def, ok := items.Get(d.Item)
		if !ok {
			return "", 0
		}
		return def.Texture, 0.45
	default:
		return "", 0
	}
}