Collisions between 2 worlds

Comments

• jdbc Member

  May 2015 edited May 2015

  Box2d uses global coordinates, so your player body could be always in the middle of the screen with constant X coordinate (320 for example if you use 320x480 screen resolution) and move the other object from right to left or left to right depending the sense of scrolling.
  
  I do not understand what you mean with 2 objects not in the same world. May be multiverse?

  JDBC Games on Google Play
  

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• jeromegsq Member

  May 2015

  Something like that :
  
  self.world1 = b2.World.new(0, 25, true)
  self.world2 = b2.World.new(-25, 0, true)
  
  The world1 make the object fall
  body = self.world1:createBody{type = b2.DYNAMIC_BODY}
  
  The world2 make the wall going to the left
  body2 = self.world2:createBody{type = b2.DYNAMIC_BODY}
  
  They can't interact because they are not in the same world
  
  

  Don't miss the ball : https://play.google.com/store/apps/details?id=fr.toastapp.dontmisstheball
  The Gobb : https://play.google.com/store/apps/details?id=fr.toastapp.thegobb

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• jdbc Member

  May 2015 edited May 2015

  Two different physic worlds in the same game? Just a multiverse theory :-)
  
  

  JDBC Games on Google Play
  

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• totebo Member

  May 2015 edited May 2015 Accepted Answer

  @jeromegsq, I think I know what you mean, but in Box2D there is (generally speaking) really no need for more than one world.
  
  If you want a body to drop and a wall to move left, then you can simply create a dynamic body (which will drop because it's dynamic) and create a kinetic body for the wall (which will move only when you tell it to) and set its LinearVelocity to (-1, 0). The dynamic body will drop and the kinetic body will move left. They will collide, and both live in the same world.
  
  

  My Gideros games: www.totebo.com

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• jeromegsq Member

  May 2015

  Ok it works thank a lot !

  Don't miss the ball : https://play.google.com/store/apps/details?id=fr.toastapp.dontmisstheball
  The Gobb : https://play.google.com/store/apps/details?id=fr.toastapp.thegobb

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• totebo Member

  May 2015

  Great! Look forward to seeing the falling bodies and moving walls in a game.

  My Gideros games: www.totebo.com

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• jeromegsq Member

  May 2015

  Yes this is for a company, but i have done another app :
  
  https://play.google.com/store/apps/details?id=com.dragonflyapps.savethedigger
  https://play.google.com/store/apps/details?id=com.dragonflyapps.whackazombie

  Don't miss the ball : https://play.google.com/store/apps/details?id=fr.toastapp.dontmisstheball
  The Gobb : https://play.google.com/store/apps/details?id=fr.toastapp.thegobb

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