RenderGlobal.java 文件源码

@Nullable

    /**
     * Returns RenderChunk offset from given RenderChunk in given direction, or null if it can't be seen by player at
     * given BlockPos.
     */
    private RenderChunk getRenderChunkOffset(BlockPos playerPos, RenderChunk renderChunkBase, EnumFacing facing)
    {
        BlockPos blockpos = renderChunkBase.getBlockPosOffset16(facing);

        if (blockpos.getY() >= 0 && blockpos.getY() < 256)
        {
            int i = playerPos.getX() - blockpos.getX();
            int j = playerPos.getZ() - blockpos.getZ();

            if (Config.isFogOff())
            {
                if (Math.abs(i) > this.renderDistance || Math.abs(j) > this.renderDistance)
                {
                    return null;
                }
            }
            else
            {
                int k = i * i + j * j;

                if (k > this.renderDistanceSq)
                {
                    return null;
                }
            }

            return renderChunkBase.getRenderChunkOffset16(this.viewFrustum, facing);
        }
        else
        {
            return null;
        }
    }