# Trigonometry for Games – Sprite Kit and Swift Tutorial: Part 2/2

**URL:** <https://forums.kodeco.com/t/trigonometry-for-games-sprite-kit-and-swift-tutorial-part-2-2/6930>\
**Category:** 🎓 Courses & Articles\
**Created:** [March 4, 2016, 12:30pm UTC](https://forums.kodeco.com/t/trigonometry-for-games-sprite-kit-and-swift-tutorial-part-2-2/6930 "2016-03-04T12:30:13Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![nicklockwood](https://assets.chunter.kodeco.com/user_avatar/forums.kodeco.com/nicklockwood/32/309_2.png) [@nicklockwood](https://forums.kodeco.com/u/nicklockwood)\
**Post date:** [March 4, 2016, 12:30pm UTC](https://forums.kodeco.com/t/trigonometry-for-games-sprite-kit-and-swift-tutorial-part-2-2/6930/1 "2016-03-04T12:30:13Z")

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Add the final touches to your iOS space game such as aiming, orbiting asteroids and collision detection with the help of trigonometry!

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 This is a companion discussion topic for the original entry at [https://www.raywenderlich.com/2241-trigonometry-for-games-sprite-kit-and-swift-tutorial-part-2-2](https://www.raywenderlich.com/2241-trigonometry-for-games-sprite-kit-and-swift-tutorial-part-2-2)

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**Author:** ![tam241992](https://assets.chunter.kodeco.com/user_avatar/forums.kodeco.com/tam241992/32/66164_2.png) [@tam241992](https://forums.kodeco.com/u/tam241992)\
**Post date:** [May 8, 2017, 12:17pm UTC](https://forums.kodeco.com/t/trigonometry-for-games-sprite-kit-and-swift-tutorial-part-2-2/6930/2 "2017-05-08T12:17:28Z")

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Help me this game: [https://www.raywenderlich.com/90521/trigonometry-games-sprite-kit-swift-tutorial-part-2](https://www.raywenderlich.com/90521/trigonometry-games-sprite-kit-swift-tutorial-part-2)  
How can I use the loop to add the monsters to know that there are blood bars as each object, is different when i shoot monster then each object will lose blood.  
Thank you.

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**Author:** ![tam241992](https://assets.chunter.kodeco.com/user_avatar/forums.kodeco.com/tam241992/32/66164_2.png) [@tam241992](https://forums.kodeco.com/u/tam241992)\
**Post date:** [May 28, 2017, 3:16am UTC](https://forums.kodeco.com/t/trigonometry-for-games-sprite-kit-and-swift-tutorial-part-2-2/6930/3 "2017-05-28T03:16:58Z")

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Help me xcode 8.3.2 ☹

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**Author:** ![shogunkaramazov](https://assets.chunter.kodeco.com/user_avatar/forums.kodeco.com/shogunkaramazov/32/108826_2.png) [@shogunkaramazov](https://forums.kodeco.com/u/shogunkaramazov)\
**Post date:** [November 14, 2017, 3:13pm UTC](https://forums.kodeco.com/t/trigonometry-for-games-sprite-kit-and-swift-tutorial-part-2-2/6930/4 "2017-11-14T15:13:44Z")

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This tutorial is more than six months old so questions are no longer supported at the moment for it. We will update it as soon as possible. Thank you! :]

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**Author:** ![shogunkaramazov](https://assets.chunter.kodeco.com/user_avatar/forums.kodeco.com/shogunkaramazov/32/108826_2.png) [@shogunkaramazov](https://forums.kodeco.com/u/shogunkaramazov)\
**Post date:** [November 14, 2017, 3:13pm UTC](https://forums.kodeco.com/t/trigonometry-for-games-sprite-kit-and-swift-tutorial-part-2-2/6930/5 "2017-11-14T15:13:46Z")

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Closed on November 14, 2017, 3:13pm UTC