@interface SCNPhysicsLinearGravityField : SCNPhysicsField - (struct SCNVector3 { float x0; float x1; float x2; })gravity; - (void)setDirection:(struct SCNVector3 { float x0; float x1; float x2; })a0; - (struct c3dPhysicsField { void /* function */ **x0; struct { void /* unknown type, empty encoding */ x0[4]; } x1; struct { void /* unknown type, empty encoding */ x0[4]; } x2; float x3; float x4; float x5; unsigned int x6; BOOL x7; BOOL x8; BOOL x9; BOOL x10; float x11; } *)_createField; - (BOOL)supportsOffset; @end