Collision size

Collision size is a unit's internal size that cannot be passed through by other units. This allows units to block each other with their bodies. Most heroes have the same collision size, regardless of their graphical model. Phased status allows units to ignore collision size.

Mechanics
The collision sizes of units is not directly set by a number in their data. Instead, collision sizes are standardized for all units, with the use of bounds hull names.

The following hull sizes exist, corresponding to the following collision sizes (from largest to smallest):

Ignoring Collision Size
Phased is a status that allows units to pass through other units, ignoring collision size. Phased units can freely walk through any other unit, including wards, but excluding buildings and trees. Other units can also walk through a stationary phased unit as if it is not there.

There are two different kinds of phased movement, pathing through units, and the rare kind which allows the unit to walk through anything, including buildings, cliffs and trees, which is more commonly referred to as unobstructed movement.

Flying movement is similar to phased movement, with only very small differences, one being that flying units hover a certain distance above the ground.

Abilities Providing Phased Movement
These abilities provide phased movement which allows moving through units:

1 Shadow Fiend becomes phased during the cast time of.

Abilities Providing Unobstructed Movement
Free pathing (also known as unobstructed movement or flying movement) allow affected units to path through buildings, cliffs and trees, on top of allowing them to path through other units. There is no limit to their movement and nothing will block them, all sources of flying give units unobstructed movement. Uphill miss chance does not apply to flying units.

The following abilities provide unobstructed movement:

1 Requires.

2 Requires talent.

3 Illusions created by these abilities have unobstructed pathing.

Tree-walking
The following abilities grants tree-walking, a buff that allows unobstructed movement through trees.

1 's innate ability and does not need to be learned.

Permanently Phased
The following units are permanently phased:
 * Supernova icon.png Phoenix Sun
 * Supernova icon.png Phoenix Sun
 * Supernova icon.png Phoenix Sun
 * Supernova icon.png Phoenix Sun
 * Supernova icon.png Phoenix Sun
 * Supernova icon.png Phoenix Sun

Patch History
Tamanho de colisão Размер столкновения 碰撞体积