# Angle.RotateAroundAxis

 Function Syntax Angle:RotateAroundAxis( Vector vAxis, Float fDegrees ) Description: Rotates this angle about the axis formed by the vector vAxis by the given number of degrees (not radians). Returns: nil In Object: Angle Realm: BBCode Link: [b][url=http://wiki.garrysmod.com/?title=Angle.RotateAroundAxis]Angle.RotateAroundAxis [img]http://wiki.garrysmod.com/favicon.ico[/img][/url][/b]

## Examples

Description Spawn a portalrift effect (Example should be used within a SWEP for 'self.Owner' to mean anything) ```  // Spawn a portalrift effect normal to the player's aim vector (parallel with the // player's Up vector) AND FACING the player (that's why we need to rotate the angle ;) )   // vAngle is the player's aim vector local vAngle = self.Owner:GetAimVector()   // Some screwed up object obfuscation: the angle of the up vector // of the angle of the vector... Get that? :D local UpAngle = vAngle:Angle():Up():Angle()   // The original UpAngle Msg("UpAngle was: " .. tostring(UpAngle) .. "\n")   // Rotate UpAngle around the up vector axis UpAngle:RotateAroundAxis(vAngle:Angle():Up(), 180)   // The Rotated UpAngle Msg("UpAngle is now: " .. tostring(UpAngle) .. "\n")     local rifteffect = ents.Create( "prop_dynamic" )   // Give the prop_dynamic the portalrift model rifteffect:SetModel( "models/Effects/portalrift.mdl" )   rifteffect:SetPos( self.Owner:GetShootPos() ) rifteffect:SetAngles( UpAngle ) rifteffect:Spawn()   // Don't draw the shadow for the effect rifteffect:DrawShadow( false )  ``` Spawns a portalrift effect facing the player when shooting a SWEP. Note that the RotateAroundAxis method performs it's rotation on the Angle Object that called it. Notice that UpAngle is different before the rotation than it is afterwards.

• This method does not return anything. It is modifying the Angle you are calling RotateAroundAxis on.