R0J0hound's Forum Posts

• • R0J0hound
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  • • Joined 15 Jun, 2009
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    • 90 topics • 7,289 posts
  • 1

  • 2 Oct, 2012
  • Quote

  For 360 degrees just use

  angle(target.X,target.Y,mouse.X,mouse.Y)

  For 90 degrees use this (modify the bold for any other range):

  clamp((360+90+angle(target.X,target.Y,mouse.X,mouse.Y))%360-180,-45,45)+90

• • R0J0hound
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  • • Joined 15 Jun, 2009
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    • 90 topics • 7,289 posts
  • 1

  • 2 Oct, 2012
  • Quote

  It looks like you have it most of the way there. A few points:

  * You can probably remove the "pick all" condition as they are all picked by default.

  * I'm guessing GlobalStoneAmmout is the same as the Array width so your second event should look like this: "StoneSelection >= GlobalStoneAmmout" since arrays always go from 0 to array.width-1.

  *Then just do set StoneSelection to array.width-1 when it's less than 0.

• • R0J0hound
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  • • Joined 15 Jun, 2009
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    • 90 topics • 7,289 posts
  • 1

  • 2 Oct, 2012
  • Quote

  Here is how I solved it before in CC:

  http://dl.dropbox.com/u/5426011/examples14/turret2.capx

  (velocity^2)/(2*acceleration) is the stopping distance.

• • R0J0hound
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  • • Joined 15 Jun, 2009
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    • 90 topics • 7,289 posts
  • 1

  • 1 Oct, 2012
  • Quote

  Do a loop over the tokens in the string and do a compare for each object type to pick which to create.

  Something like this:

  global string objs = "obj1:0,obj7:50,obj3:100,obj3:140"
  global string current_obj = ""
  
  repeat tokencount(objs, ",") times
       + set current_obj to tokenat(objs, loopindex, ",")
      system compare tokenat(current_obj, 0, ":") = "obj1")
           +create obj1 at (int(tokenat(current_obj, 1, ":")), 0)
      system compare tokenat(current_obj, 0, ":") = "obj7")
           +create obj7 at (int(tokenat(current_obj, 1, ":")), 0)
      system compare tokenat(current_obj, 0, ":") = "obj3")
           +create obj3 at (int(tokenat(current_obj, 1, ":")), 0)
• • R0J0hound
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  • • Joined 15 Jun, 2009
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    • 90 topics • 7,289 posts
  • 1

  • 1 Oct, 2012
  • Quote

  If the start and end velocity is zero then it can be done by accelerating the first half of motion and decelerating the second half by the same amount.

  Here is a capx:

  http://dl.dropbox.com/u/5426011/examples14/accel_deccel.capx

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• • R0J0hound
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  • • Joined 15 Jun, 2009
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    • 90 topics • 7,289 posts
  • 1

  • 29 Sep, 2012
  • Quote

  etting the text and object size can be performance intensive, especially on every tick. The text is in fact re-rendered every time it is changed.

  That can't be right, rendering only occurs once per frame at the end of the event sheet. Setting text and object size just sets values which should be very fast.

• • R0J0hound
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  • • Joined 15 Jun, 2009
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    • 90 topics • 7,289 posts
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  • 29 Sep, 2012
  • Quote

  You can make a normal rectangle the limit with clamp():

  set position clamp(self.x, left,right), clamp(self.y, top,bottom)

  So to do a rounded rectangle as the limit do something like this:

  1. limit to a rectangle first

  2. check if object is in a corner of the rectangle.

  3. if it is then limit it to a circle of that corner.

• • R0J0hound
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  • • Joined 15 Jun, 2009
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    • 90 topics • 7,289 posts
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  • 29 Sep, 2012
  • Quote

  Also in response to your other topic: http://www.scirra.com/forum/movement-with-chain_topic57362.html

  Well, first you would need a way to replicate the swinging rope. Physics with a hinge comes to mind. You could also use the math for pendulum motion. The swing behavior may also be a way to do it:

  http://www.scirra.com/forum/behavior-swing_topic46029.html

  Once you have a way to swing on the rope you can use it in your game by toggling the normal behavior off and your swinging behavior on whenever on the rope, and back to normal when not on the rope.

• • R0J0hound
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  • • Joined 15 Jun, 2009
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    • 90 topics • 7,289 posts
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  • 29 Sep, 2012
  • Quote

  Setting the clipboard seems to not be permitted from javascript. However with a google search I found some solutions using flash:

  http://www.deluxeblogtips.com/2010/06/javascript-copy-to-clipboard.html

  So you'd have to make a plugin to use it.

• • R0J0hound
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  • • Joined 15 Jun, 2009
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    • 90 topics • 7,289 posts
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  • 28 Sep, 2012
  • Quote

  Like projectile motion?

  http://www.scirra.com/forum/arcing-projectile_topic54153_post338694.html?KW=projectile#338694

  To make it land where you clicked set the bullet speed to:

  distance(sprite.X,sprite.Y,mouse.X,mouse.Y)*500/(2*200)

  Where 500 is the value added to the projectile's velocity variable

  and 200 is the initial value that velocity is set to.

• • R0J0hound
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  • • Joined 15 Jun, 2009
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    • 90 topics • 7,289 posts
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  • 28 Sep, 2012
  • Quote

  It's much simpler if you use a loop to find the instance with the highest value like in this post:

  http://www.scirra.com/forum/how-to-pick-an-instance-by-higher-value_topic57344_post357107.html#357107

  If you want to use the max() expression to do the same thing you will still need a loop.

  global number highest_idd
  
  every tick
     set highest_idd to 0
  
  for each sprite
     set highest_idd to max(highest_idd, sprite.idd)
  
  sprite: idd equal to highest_idd
     destroy sprite
• • R0J0hound
  • 
  • • Joined 15 Jun, 2009
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    • 90 topics • 7,289 posts
  • 1

  • 27 Sep, 2012
  • Quote

  I did a flood fill in the second capx in this post:

  http://www.scirra.com/forum/in-something-enclosed-or-is-it-just-me_topic53841_post340661.html#340661

  I made it so it can flood fill repeatedly over the same array without having to reset it's contents. n is the target-color and n+1 is the replacement-color.

• • R0J0hound
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  • • Joined 15 Jun, 2009
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    • 90 topics • 7,289 posts
  • 1

  • 27 Sep, 2012
  • Quote

  They both miss for me, I think it's just a coincidence that the bullet behavior hits and the platform doesn't.

  You have to manually check the positions the object moves over. You can do it by lerping from the old position to the new in a loop.

  every tick:
    +set newx to sprite.x
    +set newy to sprite.y
  
  repeat 11 times:
      +set sprite position to lerp(oldx,newx,loopindex/10),lerp(oldy,newy,loopindex/10)
    is sprite overlapping wall:
      + do something
  
  every tick
  [ul]
  	[li]-or--[/li]
  [/ul]start of layout:
    +set oldx to sprite.x
    +set oldy to sprite.y
• • R0J0hound
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  • • Joined 15 Jun, 2009
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    • 90 topics • 7,289 posts
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  • 27 Sep, 2012
  • Quote

  y idea would be a still camera, and then shrink and enlarge the character.

  That is quite possible, you can set the scale of a sprite with an action like so:

  Sprite set scale to K/distance_to_camera

  Where K is usually 1 but you can tweak it to adjust the strength of the effect.

• • R0J0hound
  • 
  • • Joined 15 Jun, 2009
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    • 90 topics • 7,289 posts
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  • 27 Sep, 2012
  • Quote

  Right now the entire game is loaded into memory, but only the current layout will be running. What is currently running is what affects performance.