/**
* @param Block $sourceBlock a Block with the absolute X, Y and Z from the original level
*/
public function addEntry(Block $sourceBlock)
{
if (!$this->isWritable) {
throw new \InvalidStateException("This clip is not writable");
}
if (!$sourceBlock->isValid()) {
throw new \InvalidArgumentException("Source block must contain a level and absolute coords");
}
if ($sourceBlock->getLevel()->getName() !== $this->levelName) {
throw new \InvalidStateException("Block is not from the level clip is being written in");
}
$delta = $sourceBlock->subtract($this->anchor);
$insert = Block::get($sourceBlock->getId(), $sourceBlock->getDamage(), Position::fromObject($delta->subtract($this->anchor)));
$this->entries[] = $insert;
}