minecraft-src/net/minecraft/client/renderer/entity/ItemFrameRenderer.java

package net.minecraft.client.renderer.entity;

import com.mojang.blaze3d.vertex.PoseStack;
import com.mojang.math.Axis;
import net.fabricmc.api.EnvType;
import net.fabricmc.api.Environment;
import net.minecraft.client.Minecraft;
import net.minecraft.client.renderer.MultiBufferSource;
import net.minecraft.client.renderer.Sheets;
import net.minecraft.client.renderer.block.BlockRenderDispatcher;
import net.minecraft.client.renderer.texture.OverlayTexture;
import net.minecraft.client.renderer.texture.TextureAtlas;
import net.minecraft.client.resources.model.ModelManager;
import net.minecraft.client.resources.model.ModelResourceLocation;
import net.minecraft.core.BlockPos;
import net.minecraft.core.Direction;
import net.minecraft.core.component.DataComponents;
import net.minecraft.network.chat.Component;
import net.minecraft.resources.ResourceLocation;
import net.minecraft.world.entity.EntityType;
import net.minecraft.world.entity.decoration.ItemFrame;
import net.minecraft.world.item.ItemDisplayContext;
import net.minecraft.world.item.ItemStack;
import net.minecraft.world.item.Items;
import net.minecraft.world.item.MapItem;
import net.minecraft.world.level.saveddata.maps.MapId;
import net.minecraft.world.level.saveddata.maps.MapItemSavedData;
import net.minecraft.world.phys.Vec3;

@Environment(EnvType.CLIENT)
public class ItemFrameRenderer<T extends ItemFrame> extends EntityRenderer<T> {
	private static final ModelResourceLocation FRAME_LOCATION = ModelResourceLocation.vanilla("item_frame", "map=false");
	private static final ModelResourceLocation MAP_FRAME_LOCATION = ModelResourceLocation.vanilla("item_frame", "map=true");
	private static final ModelResourceLocation GLOW_FRAME_LOCATION = ModelResourceLocation.vanilla("glow_item_frame", "map=false");
	private static final ModelResourceLocation GLOW_MAP_FRAME_LOCATION = ModelResourceLocation.vanilla("glow_item_frame", "map=true");
	public static final int GLOW_FRAME_BRIGHTNESS = 5;
	public static final int BRIGHT_MAP_LIGHT_ADJUSTMENT = 30;
	private final ItemRenderer itemRenderer;
	private final BlockRenderDispatcher blockRenderer;

	public ItemFrameRenderer(EntityRendererProvider.Context context) {
		super(context);
		this.itemRenderer = context.getItemRenderer();
		this.blockRenderer = context.getBlockRenderDispatcher();
	}

	protected int getBlockLightLevel(T entity, BlockPos pos) {
		return entity.getType() == EntityType.GLOW_ITEM_FRAME ? Math.max(5, super.getBlockLightLevel(entity, pos)) : super.getBlockLightLevel(entity, pos);
	}

	public void render(T entity, float entityYaw, float partialTicks, PoseStack poseStack, MultiBufferSource buffer, int packedLight) {
		super.render(entity, entityYaw, partialTicks, poseStack, buffer, packedLight);
		poseStack.pushPose();
		Direction direction = entity.getDirection();
		Vec3 vec3 = this.getRenderOffset(entity, partialTicks);
		poseStack.translate(-vec3.x(), -vec3.y(), -vec3.z());
		double d = 0.46875;
		poseStack.translate(direction.getStepX() * 0.46875, direction.getStepY() * 0.46875, direction.getStepZ() * 0.46875);
		poseStack.mulPose(Axis.XP.rotationDegrees(entity.getXRot()));
		poseStack.mulPose(Axis.YP.rotationDegrees(180.0F - entity.getYRot()));
		boolean bl = entity.isInvisible();
		ItemStack itemStack = entity.getItem();
		if (!bl) {
			ModelManager modelManager = this.blockRenderer.getBlockModelShaper().getModelManager();
			ModelResourceLocation modelResourceLocation = this.getFrameModelResourceLoc(entity, itemStack);
			poseStack.pushPose();
			poseStack.translate(-0.5F, -0.5F, -0.5F);
			this.blockRenderer
				.getModelRenderer()
				.renderModel(
					poseStack.last(),
					buffer.getBuffer(Sheets.solidBlockSheet()),
					null,
					modelManager.getModel(modelResourceLocation),
					1.0F,
					1.0F,
					1.0F,
					packedLight,
					OverlayTexture.NO_OVERLAY
				);
			poseStack.popPose();
		}

		if (!itemStack.isEmpty()) {
			MapId mapId = entity.getFramedMapId(itemStack);
			if (bl) {
				poseStack.translate(0.0F, 0.0F, 0.5F);
			} else {
				poseStack.translate(0.0F, 0.0F, 0.4375F);
			}

			int i = mapId != null ? entity.getRotation() % 4 * 2 : entity.getRotation();
			poseStack.mulPose(Axis.ZP.rotationDegrees(i * 360.0F / 8.0F));
			if (mapId != null) {
				poseStack.mulPose(Axis.ZP.rotationDegrees(180.0F));
				float f = 0.0078125F;
				poseStack.scale(0.0078125F, 0.0078125F, 0.0078125F);
				poseStack.translate(-64.0F, -64.0F, 0.0F);
				MapItemSavedData mapItemSavedData = MapItem.getSavedData(mapId, entity.level());
				poseStack.translate(0.0F, 0.0F, -1.0F);
				if (mapItemSavedData != null) {
					int j = this.getLightVal(entity, 15728850, packedLight);
					Minecraft.getInstance().gameRenderer.getMapRenderer().render(poseStack, buffer, mapId, mapItemSavedData, true, j);
				}
			} else {
				int k = this.getLightVal(entity, 15728880, packedLight);
				poseStack.scale(0.5F, 0.5F, 0.5F);
				this.itemRenderer.renderStatic(itemStack, ItemDisplayContext.FIXED, k, OverlayTexture.NO_OVERLAY, poseStack, buffer, entity.level(), entity.getId());
			}
		}

		poseStack.popPose();
	}

	private int getLightVal(T itemFrame, int glowLightVal, int regularLightVal) {
		return itemFrame.getType() == EntityType.GLOW_ITEM_FRAME ? glowLightVal : regularLightVal;
	}

	private ModelResourceLocation getFrameModelResourceLoc(T entity, ItemStack item) {
		boolean bl = entity.getType() == EntityType.GLOW_ITEM_FRAME;
		if (item.is(Items.FILLED_MAP)) {
			return bl ? GLOW_MAP_FRAME_LOCATION : MAP_FRAME_LOCATION;
		} else {
			return bl ? GLOW_FRAME_LOCATION : FRAME_LOCATION;
		}
	}

	public Vec3 getRenderOffset(T entity, float partialTicks) {
		return new Vec3(entity.getDirection().getStepX() * 0.3F, -0.25, entity.getDirection().getStepZ() * 0.3F);
	}

	/**
	 * Returns the location of an entity's texture.
	 */
	public ResourceLocation getTextureLocation(T entity) {
		return TextureAtlas.LOCATION_BLOCKS;
	}

	protected boolean shouldShowName(T entity) {
		if (Minecraft.renderNames()
			&& !entity.getItem().isEmpty()
			&& entity.getItem().has(DataComponents.CUSTOM_NAME)
			&& this.entityRenderDispatcher.crosshairPickEntity == entity) {
			double d = this.entityRenderDispatcher.distanceToSqr(entity);
			float f = entity.isDiscrete() ? 32.0F : 64.0F;
			return d < f * f;
		} else {
			return false;
		}
	}

	protected void renderNameTag(T entity, Component displayName, PoseStack poseStack, MultiBufferSource bufferSource, int packedLight, float partialTick) {
		super.renderNameTag(entity, entity.getItem().getHoverName(), poseStack, bufferSource, packedLight, partialTick);
	}
}