Movement by curve (sin, coz, bezier)

[samjarman]

Hey all! 

 

Looking for a nice way to do movement of some animated sprites I have moving left to right so they look more like flying birds. 

 

Currently they just float left to right like this,       

bird.body.velocity.x = 100;

Obviously thats too simplistic of a model of motion. It'd be cool to define a cos curve with amplitude and period to make them more like they're bobbing up and down. Thoughts?

 

Cheers!

[LeonardoDigital]

One simple way could be adding a vertical tween looping to each bird and since they already have a horizontal movement they will end making kind of an arc.

[SeanEBaby]

Maybe you could use something from how John makes the missile wobbles in this example.

[eguneys]

Take a look at this code snippet for flying pigeons from the game canabalt:

      velocity.y = -50 - FlxU.random*50;      acceleration.y = -50 - FlxU.random*300;      int vel = (player.velocity.x-300)*FlxU.random;      acceleration.x = (self.facing == 0) ? vel : -vel;

https://github.com/ericjohnson/canabalt-ios/blob/master/src/Dove.m#L179