Difference between revisions of "Physicsless part"

From Kerbal Space Program Wiki
Jump to: navigation, search
(Clarify that the comparison was from a time before the mass was added to the parent)
Line 1: Line 1:
[[File:RV-105 RCS Thruster Block Delta V test.png|thumb|Delta-V comparison of three [[RV-105 RCS Thruster Block]] as massless and normal parts]]
+
[[File:RV-105 RCS Thruster Block Delta V test.png|thumb|Delta-V comparison of three [[RV-105 RCS Thruster Block]] as massless and normal parts, before the changes introduced in [[1.0.1]]]]
 
'''Physicsless parts''' are parts where the physics don't work in the usual way. The mass of the part and the drag experienced by it are added to the parent's part. The part itself has no mass nor drag, but it still contributes to the vehicle's mass; in short, during movement, the added physicless parts would not generate mass-shift and drag that affect how the overall vessel move. Before [[1.0.1]] the mass and the drag weren't added to the parent but just ignored. It is influenced by the <code>PhysicsSignificance</code> flag in the part configuration which must be set to 1 to make it physicsless.
 
'''Physicsless parts''' are parts where the physics don't work in the usual way. The mass of the part and the drag experienced by it are added to the parent's part. The part itself has no mass nor drag, but it still contributes to the vehicle's mass; in short, during movement, the added physicless parts would not generate mass-shift and drag that affect how the overall vessel move. Before [[1.0.1]] the mass and the drag weren't added to the parent but just ignored. It is influenced by the <code>PhysicsSignificance</code> flag in the part configuration which must be set to 1 to make it physicsless.
  

Revision as of 18:21, 19 January 2020

Delta-V comparison of three RV-105 RCS Thruster Block as massless and normal parts, before the changes introduced in 1.0.1

Physicsless parts are parts where the physics don't work in the usual way. The mass of the part and the drag experienced by it are added to the parent's part. The part itself has no mass nor drag, but it still contributes to the vehicle's mass; in short, during movement, the added physicless parts would not generate mass-shift and drag that affect how the overall vessel move. Before 1.0.1 the mass and the drag weren't added to the parent but just ignored. It is influenced by the PhysicsSignificance flag in the part configuration which must be set to 1 to make it physicsless.

When constructing a craft, the root part can't be such a part.

Behaviour

A craft with only physicsless parts starts to oscillate after a short time and then starts to destroy itself. But this is usually not possible because the root part is always not a physicsless part. The game can change the property on the fly, so that when a new root part after decoupling would be physicsless the game removes that special status.

List of physicsless parts

Physicsless parts as of 1.4.5:

Note that several parts, such as the LT-2 Landing Strut, have PhysicsSignificance = 0 in its part.cfg. This does nothing, and the part behaves as normal.

See also