Swift and Sprite Kit - How can I measure the total distance a sprite has travelled?
up vote
2
down vote
favorite
In my game, the player sprite travels continiously upwards as I have set the velocity of the sprite in the update function with:
override func update(_ currentTime: TimeInterval) {
...
player.physicsBody!.velocity.dy = max(player.physicsBody!.velocity.dy, 650 * gameGain)
}
Now I would like to measure the total distance the sprite has travelled. Is there any way/method to do so or do I have to make a variable to manually count the distance, e.g.
var distance:Float
override func update(_ currentTime: TimeInterval) {
player.physicsBody!.velocity.dy = max(player.physicsBody!.velocity.dy, 650 * gameGain)
distance += 650
}
Thanks in advance!
ios swift sprite-kit
edited Nov 20 at 15:33
Tamás Sengel
25.9k146592
asked Nov 20 at 13:25
Linh Kästner
112
add a comment |
up vote
2
down vote
favorite
In my game, the player sprite travels continiously upwards as I have set the velocity of the sprite in the update function with:
override func update(_ currentTime: TimeInterval) {
...
player.physicsBody!.velocity.dy = max(player.physicsBody!.velocity.dy, 650 * gameGain)
}
Now I would like to measure the total distance the sprite has travelled. Is there any way/method to do so or do I have to make a variable to manually count the distance, e.g.
var distance:Float
override func update(_ currentTime: TimeInterval) {
player.physicsBody!.velocity.dy = max(player.physicsBody!.velocity.dy, 650 * gameGain)
distance += 650
}
Thanks in advance!
ios swift sprite-kit
edited Nov 20 at 15:33
Tamás Sengel
25.9k146592
asked Nov 20 at 13:25
Linh Kästner
112
keep track of your starting location and just use the distance formula
– Knight0fDragon
Nov 20 at 13:55
add a comment |
up vote
2
down vote
favorite
up vote
2
down vote
favorite
In my game, the player sprite travels continiously upwards as I have set the velocity of the sprite in the update function with:
override func update(_ currentTime: TimeInterval) {
...
player.physicsBody!.velocity.dy = max(player.physicsBody!.velocity.dy, 650 * gameGain)
}
Now I would like to measure the total distance the sprite has travelled. Is there any way/method to do so or do I have to make a variable to manually count the distance, e.g.
var distance:Float
override func update(_ currentTime: TimeInterval) {
player.physicsBody!.velocity.dy = max(player.physicsBody!.velocity.dy, 650 * gameGain)
distance += 650
}
Thanks in advance!
ios swift sprite-kit
edited Nov 20 at 15:33
Tamás Sengel
25.9k146592
asked Nov 20 at 13:25
Linh Kästner
112
In my game, the player sprite travels continiously upwards as I have set the velocity of the sprite in the update function with:
override func update(_ currentTime: TimeInterval) {
...
player.physicsBody!.velocity.dy = max(player.physicsBody!.velocity.dy, 650 * gameGain)
}
Now I would like to measure the total distance the sprite has travelled. Is there any way/method to do so or do I have to make a variable to manually count the distance, e.g.
var distance:Float
override func update(_ currentTime: TimeInterval) {
player.physicsBody!.velocity.dy = max(player.physicsBody!.velocity.dy, 650 * gameGain)
distance += 650
}
Thanks in advance!
ios swift sprite-kit
ios swift sprite-kit
edited Nov 20 at 15:33
Tamás Sengel
25.9k146592
asked Nov 20 at 13:25
Linh Kästner
112
edited Nov 20 at 15:33
Tamás Sengel
25.9k146592
asked Nov 20 at 13:25
Linh Kästner
112
edited Nov 20 at 15:33
Tamás Sengel
25.9k146592
edited Nov 20 at 15:33
Tamás Sengel
25.9k146592
edited Nov 20 at 15:33
Tamás Sengel
25.9k146592
25.9k146592
asked Nov 20 at 13:25
Linh Kästner
112
asked Nov 20 at 13:25
Linh Kästner
112
asked Nov 20 at 13:25
Linh Kästner
112
112
keep track of your starting location and just use the distance formula
– Knight0fDragon
Nov 20 at 13:55
add a comment |
keep track of your starting location and just use the distance formula
– Knight0fDragon
Nov 20 at 13:55
keep track of your starting location and just use the distance formula
– Knight0fDragon
Nov 20 at 13:55
keep track of your starting location and just use the distance formula
– Knight0fDragon
Nov 20 at 13:55
add a comment |
1 Answer
1
active
oldest
votes
up vote
1
down vote
If you are interested in the distance from the starting location to the current location, you can remember the start location and then calculate the distance:
let startPosition: CGPoint
var distance: CGFloat
init(startLocation: CGPoint) {
self.startPosition = startPosition
distance = 0
}
// Calculate the distance between two points using Pythagoras. You can make your code clean, by moving this into an extension for CGPoint.
private func distance(point1: CGPoint, point1: CGPoint) -> CGFloat {
let dx = point1.x - point2.x
let dy = point1.y - point2.y
return sqrt(dx * dx + dy * dy);
}
override func update(_ currentTime: TimeInterval) {
// Move the sprite
let newPlayerPosition = player.position
distance = distance(point1: newPlayerPosition, point2: startPosition)
}
answered Nov 20 at 15:56
gebirgsbärbel
1,33211631
add a comment |
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1 Answer
1
active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
up vote
1
down vote
If you are interested in the distance from the starting location to the current location, you can remember the start location and then calculate the distance:
let startPosition: CGPoint
var distance: CGFloat
init(startLocation: CGPoint) {
self.startPosition = startPosition
distance = 0
}
// Calculate the distance between two points using Pythagoras. You can make your code clean, by moving this into an extension for CGPoint.
private func distance(point1: CGPoint, point1: CGPoint) -> CGFloat {
let dx = point1.x - point2.x
let dy = point1.y - point2.y
return sqrt(dx * dx + dy * dy);
}
override func update(_ currentTime: TimeInterval) {
// Move the sprite
let newPlayerPosition = player.position
distance = distance(point1: newPlayerPosition, point2: startPosition)
}
answered Nov 20 at 15:56
gebirgsbärbel
1,33211631
add a comment |
up vote
1
down vote
If you are interested in the distance from the starting location to the current location, you can remember the start location and then calculate the distance:
let startPosition: CGPoint
var distance: CGFloat
init(startLocation: CGPoint) {
self.startPosition = startPosition
distance = 0
}
// Calculate the distance between two points using Pythagoras. You can make your code clean, by moving this into an extension for CGPoint.
private func distance(point1: CGPoint, point1: CGPoint) -> CGFloat {
let dx = point1.x - point2.x
let dy = point1.y - point2.y
return sqrt(dx * dx + dy * dy);
}
override func update(_ currentTime: TimeInterval) {
// Move the sprite
let newPlayerPosition = player.position
distance = distance(point1: newPlayerPosition, point2: startPosition)
}
answered Nov 20 at 15:56
gebirgsbärbel
1,33211631
add a comment |
up vote
1
down vote
up vote
1
down vote
If you are interested in the distance from the starting location to the current location, you can remember the start location and then calculate the distance:
let startPosition: CGPoint
var distance: CGFloat
init(startLocation: CGPoint) {
self.startPosition = startPosition
distance = 0
}
// Calculate the distance between two points using Pythagoras. You can make your code clean, by moving this into an extension for CGPoint.
private func distance(point1: CGPoint, point1: CGPoint) -> CGFloat {
let dx = point1.x - point2.x
let dy = point1.y - point2.y
return sqrt(dx * dx + dy * dy);
}
override func update(_ currentTime: TimeInterval) {
// Move the sprite
let newPlayerPosition = player.position
distance = distance(point1: newPlayerPosition, point2: startPosition)
}
answered Nov 20 at 15:56
gebirgsbärbel
1,33211631
If you are interested in the distance from the starting location to the current location, you can remember the start location and then calculate the distance:
let startPosition: CGPoint
var distance: CGFloat
init(startLocation: CGPoint) {
self.startPosition = startPosition
distance = 0
}
// Calculate the distance between two points using Pythagoras. You can make your code clean, by moving this into an extension for CGPoint.
private func distance(point1: CGPoint, point1: CGPoint) -> CGFloat {
let dx = point1.x - point2.x
let dy = point1.y - point2.y
return sqrt(dx * dx + dy * dy);
}
override func update(_ currentTime: TimeInterval) {
// Move the sprite
let newPlayerPosition = player.position
distance = distance(point1: newPlayerPosition, point2: startPosition)
}
answered Nov 20 at 15:56
gebirgsbärbel
1,33211631
answered Nov 20 at 15:56
gebirgsbärbel
1,33211631
answered Nov 20 at 15:56
gebirgsbärbel
1,33211631
answered Nov 20 at 15:56
gebirgsbärbel
1,33211631
1,33211631
add a comment |
add a comment |
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keep track of your starting location and just use the distance formula
– Knight0fDragon
Nov 20 at 13:55