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package makamys.lodmod.util;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.stream.Collectors;
import net.minecraft.client.Minecraft;
import net.minecraft.client.renderer.texture.TextureAtlasSprite;
import net.minecraft.client.renderer.texture.TextureMap;
import net.minecraft.world.ChunkCoordIntPair;
public class SpriteUtil {
private static int[] spriteIndexMap;
public static List<TextureAtlasSprite> sprites;
private static Map<Long, Integer> uv2spriteIndex = new HashMap<>();
private static int findSpriteIndexForUV(float u, float v) {
Map<String, TextureAtlasSprite> uploadedSprites = ((TextureMap)Minecraft.getMinecraft().getTextureManager().getTexture(TextureMap.locationBlocksTexture)).mapUploadedSprites;
int spriteIndex = 0;
for(TextureAtlasSprite tas : uploadedSprites.values()) {
if(tas.getMinU() <= u && u <= tas.getMaxU() && tas.getMinV() <= v && v <= tas.getMaxV()) {
break;
}
spriteIndex++;
}
return spriteIndex;
}
public static int getSpriteIndexForUV(float u, float v){
long key = ChunkCoordIntPair.chunkXZ2Int((int)(u * Integer.MAX_VALUE), (int)(v * Integer.MAX_VALUE));
int index = uv2spriteIndex.getOrDefault(key, -1);
if(index == -1) {
index = findSpriteIndexForUV(u, v);
uv2spriteIndex.put(key, index);
}
return index;
}
public static TextureAtlasSprite getSprite(int i){
if(i >= 0 && i < sprites.size()) {
return sprites.get(i);
} else {
return null;
}
}
public static void init() {
Map<String, TextureAtlasSprite> uploadedSprites = ((TextureMap)Minecraft.getMinecraft().getTextureManager().getTexture(TextureMap.locationBlocksTexture)).mapUploadedSprites;
sprites = uploadedSprites.values().stream().collect(Collectors.toList());
}
}
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