CODEWITHSUNDEEP
sprite-kitgravityskphysicsbody
Duncan Groenewald
Duncan Groenewald

Reputation: 8998

why are two nodes with affectedByGravity = NO attracted to gravity field?

I have a 'Moon' which has a gravity field in it and the 'Moon' is set with 'affectedByGravity = NO' and does not get affected by the scene's gravity field.

However I have an 'Asteroid' which also has the 'affectedByGravity = NO' set and it still gets attracted to the 'Moon' but not to the scenes gravity field.

Is this a bug or have I misunderstood how 'affectedByGravity' works?

EDIT: Excerpt from Apple docs

Defining How Forces Affect a Physics Body affectedByGravity Property A Boolean value that indicates whether this physics body is affected by the physics world’s gravity and the gravity exerted by any physics fields in the scene.

Declaration SWIFT var affectedByGravity: Bool Discussion The physics world’s gravity property defines the gravitational forces applied to volume-based bodies in the scene. The default value is true. This property is ignored on edge-based bodies, which are already unaffected by gravity.

Import Statement import SpriteKit

Availability Available in iOS 7.0 and later.

Upvotes: 1

Views: 251

Answers (1)

ZeMoon
ZeMoon

Reputation: 20274

The affectedByGravity property is only for the scene's physicsWorld, and not for a gravity field. If you want the asteroid to not be affected by the moon, you will have to set it's physicsBody's fieldBitMask as 0 (or a value other than that of the gravity field's bitMask).

Read up on the Adding Physics Fields To Your Scene section in Apple's Documentation.

Upvotes: 6

Related Questions