How do I make earth rotate around the sun?

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   I know, should not have missed some math classes. I am trying to make an object move around another, like earth move around the sun. But I don't know how to do it.

I need the object that is moving always face the object it is moving around. 

Sorry for my poor english.

It would be nice if it were possible to rotate an object using it´s Image Point.

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Jailson 9,810 Rep 4 4 223	Post Options Post Reply Quote Jailson Report Post Quote Reply Topic: How do I make earth rotate around the sun? Posted: 28 Oct 2011 at 12:30am
	I know, should not have missed some math classes. I am trying to make an object move around another, like earth move around the sun. But I don't know how to do it. I need the object that is moving always face the object it is moving around. Sorry for my poor english. It would be nice if it were possible to rotate an object using it´s Image Point.
	Apimenti Games games.apimenti.com

Nickydude 6,791 Rep 5 14 39	Post Options Post Reply Quote Nickydude Report Post Quote Reply Posted: 28 Oct 2011 at 12:35am
	Take a look at the Pin example that comes with the latest build, that should help you.


Jailson 9,810 Rep 4 4 223	Post Options Post Reply Quote Jailson Report Post Quote Reply Posted: 28 Oct 2011 at 12:47am
	I see. In that example the object rotates, then others move around. This is the only way? I mean, I don´t want the object in the center rotates!
	Apimenti Games games.apimenti.com

Ashley Scirra Developer 78,501 Rep 17 58 185	Post Options Post Reply Quote Ashley Report Post Quote Reply Posted: 28 Oct 2011 at 12:50am
	The math you need is: Set X to CenterX + cos(angle) * dist Set Y to CenterY + sin(angle) * dist CenterX/Y defines the center point of the circle, at the give angle, with a radius of 'dist'. Math is actually really helpful in game creation, it's worth brushing up! Edited by Ashley - 28 Oct 2011 at 12:51am
	The Construct 2 manual - Beginner's guide to Construct 2

Jailson 9,810 Rep 4 4 223	Post Options Post Reply Quote Jailson Report Post Quote Reply Posted: 28 Oct 2011 at 2:22am
	I know @Ashley! Math is good! Thanks to your formula I was able to reach my goal. I would like to share what I just learned. Here is an example of what I wanted to do. The project file (.capx) is also available! Edited by Jailson - 28 Oct 2011 at 2:32am
	Apimenti Games games.apimenti.com

Kyatric Moderator 28,650 Rep 17 33 97	Post Options Post Reply Quote Kyatric Report Post Quote Reply Posted: 28 Oct 2011 at 12:45pm
	Yes please Jailson, post the capx for this very example. I added this topic in the FAQ.
	New to Construct ? Where to start - how do I FAQ Pro tips for Scirra's forums

Jailson 9,810 Rep 4 4 223	Post Options Post Reply Quote Jailson Report Post Quote Reply Posted: 28 Oct 2011 at 12:58pm
	@Kyatric, the .capx is available at the example link. Below the demo. But if you want it here, no problem, here it is.
	Apimenti Games games.apimenti.com

Kyatric Moderator 28,650 Rep 17 33 97	Post Options Post Reply Quote Kyatric Report Post Quote Reply Posted: 28 Oct 2011 at 1:04pm
	Oh sorry, I didn't pay attention and missed the link. Well at least it's here too now. Good job, thanks for the example.
	New to Construct ? Where to start - how do I FAQ Pro tips for Scirra's forums

newt 16,524 Rep 13 13 74	Post Options Post Reply Quote newt Report Post Quote Reply Posted: 28 Oct 2011 at 3:52pm
	Yeah that's a pretty standard formula, and can be applied in a ton of different ways. ..... wouldn't mind seeing it as an expression in C2.


deathofthedead 749 Rep 2 3	Post Options Post Reply Quote deathofthedead Report Post Quote Reply Posted: 11 Jan 2012 at 6:17pm
	This is something I'd been trying to get to work, so this is very helpful. What would you need to do to let the player control rotation? I'm thinking of using this method for a targeting cursor that rotates around the main character when the player aims.