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    sprite follow a drawn path

    arcadiaarcadia Member
    edited December 2012 in General questions
    Hi,
    I want to draw a shape/path and then move a sprite along that path.
    I draw a shape with mouse and i store the x/y coords in mouse move event. Then with a timer i set the sprite position with that stored coords.
    The problem is that i need a constant and normalized moviment and not the slower or faster mouse moviment.
    I want to do something like this:
    https://play.google.com/store/apps/details?id=com.playcreek.MagicWingdom

    Dislikes: aditya

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    Comments

    • ar2rsawseenar2rsawseen Maintainer
      Accepted Answer
      You can use GTween library and tween between points and calculating tweening time dynamically based on the distance you need to travel between these two points. I think this should provide smooth movement.
      http://appcodingeasy.com/Gideros-Mobile
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    • arcadiaarcadia Member
      edited December 2012
      Ok thanks it is ok now. But now i have an other problem. I need to detect a collision between all the sprite that moves randomly with the sprite i move too but when my sprite is "under" gtween' interpolation it don t seems to detect the collision. Is ok when they just move random...
      And also: i have to do all with box2d? The moviment random, the moviment along the path and the collision? I do not use box2d
      Thanks i m new with gidetos and lua
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    • ar2rsawseenar2rsawseen Maintainer
      @arcadia, no you don't need to mandatory use box2d.
      There are two ways to handle this:
      1) if you want simply check a bounding box collision between sprites, without rotation or any other modification, you can use this simple method:
      function Sprite:collidesWith(sprite2)
	local x,y,w,h = self:getBounds(stage)
	local x2,y2,w2,h2 = sprite2:getBounds(stage)
 
	return not ((y+h < y2) or (y > y2+h2) or (x > x2+w2) or (x+w < x2))
end
      2) if you have more complex shapes then boxes or you may also rotate/scale or otherly modify the the sprite, you'll need something more sophisticated than bounding box. For that you can use super fast TNT Collision Engine
      http://www.tntparticlesengine.com/?cat=15

      Likes: atilim

      http://appcodingeasy.com/Gideros-Mobile
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    • arcadiaarcadia Member
      Thx solved with gtween for interpolation and tnt particleengine for collision
      MY ANDROID APPS:
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