Method allocate

src/world/scene_graph.cpp:68–105

}

void SceneGraph::allocate(u32 num)
{
	CE_ASSERT(num > _data.size, "num > _data.size");

	const u32 bytes = 0
		+ num*sizeof(UnitId) + alignof(UnitId)
		+ num*sizeof(Matrix4x4) + alignof(Matrix4x4)
		+ num*sizeof(Pose) + alignof(Pose)
		+ num*sizeof(TransformId) * 4 + alignof(TransformId)
		+ num*sizeof(bool) + alignof(bool)
		;

	InstanceData new_data;
	new_data.size = _data.size;
	new_data.capacity = num;
	new_data.buffer = _allocator->allocate(bytes);

	new_data.unit         = (UnitId *           )memory::align_top(new_data.buffer,             alignof(UnitId));
	new_data.world        = (Matrix4x4 *        )memory::align_top(new_data.unit + num,         alignof(Matrix4x4));
	new_data.local        = (Pose *             )memory::align_top(new_data.world + num,        alignof(Pose));
	new_data.parent       = (TransformId *)memory::align_top(new_data.local + num,        alignof(TransformId));
	new_data.first_child  = (TransformId *)memory::align_top(new_data.parent + num,       alignof(TransformId));
	new_data.next_sibling = (TransformId *)memory::align_top(new_data.first_child + num,  alignof(TransformId));
	new_data.prev_sibling = (TransformId *)memory::align_top(new_data.next_sibling + num, alignof(TransformId));
	new_data.changed      = (bool *             )memory::align_top(new_data.prev_sibling + num, alignof(bool));

	memcpy(new_data.unit, _data.unit, _data.size * sizeof(UnitId));
	memcpy(new_data.world, _data.world, _data.size * sizeof(Matrix4x4));
	memcpy(new_data.local, _data.local, _data.size * sizeof(Pose));
	memcpy(new_data.parent, _data.parent, _data.size * sizeof(TransformId));
	memcpy(new_data.first_child, _data.first_child, _data.size * sizeof(TransformId));
	memcpy(new_data.next_sibling, _data.next_sibling, _data.size * sizeof(TransformId));
	memcpy(new_data.prev_sibling, _data.prev_sibling, _data.size * sizeof(TransformId));
	memcpy(new_data.changed, _data.changed, _data.size * sizeof(bool));

	_allocator->deallocate(_data.buffer);
	_data = new_data;
}

void SceneGraph::unit_destroyed_callback(UnitId unit)
{