Sticky walls - GameCreators Forum

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Behdadsoft

15

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Joined: 7th Apr 2009

Location: Tehran-Iran

Posted: 9th Aug 2014 08:12

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i made a platform game, that can jump and move to left and right. now when I jump and Press left or right key, my character Stick to wall. how can disable wall Adhesion?

Thanks.

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Naphier

13

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Joined: 2nd Oct 2010

Location: St Petersburg, Florida

Posted: 9th Aug 2014 09:50

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Physics or your own code-based controllers?
Post some code for better chance at someone helping

Napland Games - Shape Time - Wordspionage - dFenz Facebook

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Behdadsoft

15

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Joined: 7th Apr 2009

Location: Tehran-Iran

Posted: 9th Aug 2014 10:04

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here is my code:

+ Code Snippet

rem Landscape App
SetDisplayAspect( -1 )
AddVirtualJoystick(1,6,91,8)
AddVirtualButton (1,95,91,5)

rem Create Sprite
spr = createSprite(0)
setSpriteSize(spr,4,8)
setSpriteOffset(spr,2,4)
setSpritePositionByOffset(spr,50,50)
setSpritePhysicsOn(spr,2)
setSpritePhysicsCanRotate(spr,0)
boxman = spr

 // Load ground Texture
img = LoadImage ("Texture.png")
ground = CreateSprite(img)
setSpriteAnimation(ground,128,128,2)
SetSpriteVisible(ground,0)

do
 Print ("Joystick X: " + str(GetVirtualJoystickX(1)))
 Print ("Joystick Y: " + str(GetVirtualJoystickY(1)))

 SetSpritePhysicsVelocity (boxman, GetVirtualJoystickX(1)*20,       GetSpritePhysicsVelocityY(boxman))

 jump = GetVirtualButtonPressed(1)
 if jump>0
    if (Press = 0)
    setSpritePhysicsVelocity(boxman,getSpritePhysicsVelocityX(boxman),-jump*60)
    Press = 1
   endif
endif

 if getSpritePhysicsVelocityY(boxman) = 0 Then Press = 0

Print (cspr)
 Sync()
loop

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Naphier

13

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Joined: 2nd Oct 2010

Location: St Petersburg, Florida

Posted: 9th Aug 2014 10:13

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You'll need to set up something other than the screen walls so that you can test for collision and stop the horizontal velocity.
I was looking for some commands for friction to see if that could help out, but AppGameKit physics are pretty primitive

Napland Games - Shape Time - Wordspionage - dFenz Facebook

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Funnell7

12

Years of Service

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Joined: 8th Sep 2011

Location: UK, England

Posted: 9th Aug 2014 11:01 Edited at: 9th Aug 2014 11:03

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Behdadsoft, you could do this with the RayCast commands. For our platform game I crated a RayCast from the center of my character to a couple pixels below his feet, and the same from center to right and center to left. I then used these to see if the character had collided with the walls (my own walls, like Naphier's suggestion). You can also use this for the Jump by making sure the character is on the ground.

Here's a code snippet from my app to prevent the wall sticking;

+ Code Snippet

     if  PlayerMovement > 0.1 AND RCRight = 0 // RCRight = Ray Cast Right
        SetSpritePhysicsVelocity(Chick, PlayerMovement, GetSpritePhysicsVelocityY(Chick))
     elseif PlayerMovement < -0.1 AND RCLeft = 0 // RCLeft = Ray Cast Left
        SetSpritePhysicsVelocity(Chick, PlayerMovement, GetSpritePhysicsVelocityY(Chick))
     else
        SetSpritePhysicsVelocity(Chick, 0, GetSpritePhysicsVelocityY(Chick))
     endif

And this is for Jumping;

+ Code Snippet

     if Press1 = JumpButton AND RCCenterDown = 1
          Jump = 1
     else
          Jump = 0
     endif

If you need to see the RayCast set up, let me know...

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Behdadsoft

15

Years of Service

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Joined: 7th Apr 2009

Location: Tehran-Iran

Posted: 9th Aug 2014 11:27

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Thanks Funnell7.
could you add RayCast to my code and fix sticky wall?

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