Clamp Velocity of an SKNode's PhysicsBody

Clamp Velocity of an SKNode's PhysicsBody

        /* Clamp Velocity */
        
        // Set the initial parameters
        let maxVelocity = CGFloat(100)
        let deltaX = (self.physicsBody?.velocity.dx)!
        let deltaY = (self.physicsBody?.velocity.dy)!
        
        
        // Get the actual length of the vector with Pythagorean Theorem
        let deltaZ = sqrt(pow(deltaX, 2) + pow(deltaY, 2))
        
        
        // If the vector length is higher then the max velocity
        if  deltaZ > maxVelocity {
            
            // Get the proportions for X and Y axis compared to the Z of the Pythagorean Theorem
            let xProportion = deltaX / deltaZ
            let yProportion = deltaY / deltaZ
            
            // Get a new X and Y length in proportion to the max velocity
            let correctedDeltaX = xProportion * maxVelocity
            let correctedDeltaY = yProportion * maxVelocity
            
            // Assign the new velocity to the Node
            self.physicsBody?.velocity = CGVector(dx: correctedDeltaX, dy: correctedDeltaY)
        }