When I try to get quads for beds/chests/fluids via this code

// Get level, where command is executed
ServerLevel level = source.getLevel();

// Get BlockState at position
BlockState block = level.getBlockState(levelPosition);

// We do not want to render air
if (!block.isAir()) {
	// Is used to get IBakedModel
	BlockRenderDispatcher blockRenderer = Minecraft.getInstance().getBlockRenderer();

	// Is used in getQuads(...)
	Random rand = new Random();

	// Rendered block
    RenderedBlock renderedBlock = new RenderedBlock(regionPosition.getX(),
                                                    regionPosition.getY(),
                                                    regionPosition.getZ());

    // Block extra model data
    IModelData data = blockRenderer.getBlockModel(block).getModelData(level, levelPosition, block, EmptyModelData.INSTANCE);

    // Get model quads
    List<BakedQuad> quads = blockRenderer.getBlockModel(block).getQuads(block, null, rand, data);

   	// List of all possible directions
    ArrayList<Direction> directions = RenderCubeUtils.getAllPossibleDirections();

    // Through all directions
    for (Direction direction : directions) {
    	// Get model quads, corresponding to this direction
        List<BakedQuad> quadsTemp = blockRenderer.getBlockModel(block).getQuads(block, direction, rand, data);

        // Join lists of quads
        quads = Stream.concat(quads.stream(), quadsTemp.stream()).toList();
	}
}

I get empty 'quads' list. Why is this happening? How can I fix this?

Edited November 30, 20222 yr by Sireous
Question is solved

They don't use baked models. See for example BedRenderer.

The only thing they define in their models is the block break particle 🙂 

https://github.com/misode/mcmeta/blob/assets/assets/minecraft/models/block/bed.json

 

I've never tried to do it, but I guess If you want to draw something with a BlockEntityRenderer then you need to use the BlockEntityRendererDispatcher

BlockEntityWithoutLevelRenderer kind of does this, but it does it to draw them as items.

Thanks warjort. I was afraid, that this is because they are entities. Now I know where to dig.

But what about water, for example? I have checked via debug code, that there is no entity there (appropriate method return null). What is wrong with liquids?

BlockRenderDispatcher.renderLiquid()

By the way, I see a lot of renderers use VertexConsumer. Seems like all renderers use them to send verticies to graphics engine. Can I make such consumer and act as OpenGL to get rendered verticies in a block?

Like I said, it's not something I've tried, but I would say probably not, it depends upon what you are trying to do.

 

Those renderers are not prebacked for a reason. Their rendering depends ad hocly upon the state of the world.

You could in principle call them with your own dummy consumers to capture the quads, but those quads could (likely will) be invalid once the state of the world changes.

This includes time where the rendering is animated.

Well, I hope this picture explains my intentions:

https://drive.google.com/file/d/1BTx4zqqn6_K-P3j7d_iK2hb4Ia3t6HKv/view?usp=share_link