I created a spinning object using a pivot joint. I also created a wind vent to make the object spin. The problem I’m having is when game objects hit the spinning object it slows down. I would think the vent should cause it to pick up speed once the other objects are no longer obstructing its movement.
I increased the applyTorque which made the object spin faster but I am having the same problem.
Also, is there a way to see which direction the vent is blowing?
Thanks
Lori
Is your vent object a sensor and are you following this tutorial (3rd topic): http://coronalabs.com/blog/2013/02/19/more-physics-tricks-explained/ ?
Oh, and can you show some code from your app so we can examine it and comment on what might be causing the issue? I suggest the vent-related collision code.
Yes - I am using that tutorial. Below is my code.
I am using Composer and this first part of the code is in the TOP section where I place events.
– RETREIVE VENT FORCE VALUES
function getVentVals( angle, power )
local xF = math.cos( (angle-90)*(math.pi/180) ) * power
local yF = math.sin( (angle-90)*(math.pi/180) ) * power
return xF,yF
end
– VENT COLLISION HANDLER
function ventCollide( self,event )
local vent = event.other
if ( event.phase == “began” and vent.isVent == true ) then
self.xF = self.xF+vent.xF ; self.yF = self.yF+vent.yF
elseif ( event.phase == “ended” and vent.isVent == true ) then
self.xF = self.xF-vent.xF ; self.yF = self.yF-vent.yF
end
end
–handles actions in both the began and ended phases of the collision
– RUNTIME FORCE APPLICATION
function constantForce1()
if not ( spinner1.xF == 0 and spinner1.yF == 0 ) then
spinner1:applyForce( spinner1.xF, spinner1.yF, spinner1.x, spinner1.y )
end
end
This part of the code is in Scene Create:
–CONFIGURE WIND VENT
local vent1 = display.newRect( 0, 0, 80, 80 ) – THE SIZE OF THE VENT
physics.addBody(vent1, “kinematic”, { isSensor=true } )
vent1.isVisible = true
vent1.isVent = true --so that other objects are not considered vents in the collision handler
–vent1.rotation = 180 ;
vent1.x = 384 ; vent1.y = 484
vent1.xF, vent1.yF = getVentVals( vent1.rotation, 90 )
–SPINNER BUMPER
bumperBody.shape = spinnerBumperShape
myCircle1 = display.newCircle (384, 500,5)
sceneGroup:insert(myCircle1)
physics.addBody(myCircle1,“static”,{radius=5, bounce=0.5, friction =0.953})
spinner1 = display.newImage(“Images/SpinnerBumperlrg.png”, 384, 500)
sceneGroup:insert(spinner1)
physics.addBody(spinner1, {density =4, bounce=0.5, friction =0.153})
–I’ve been playing around with the items below to see if I can make it work
spinner1:applyTorque (1000)
spinner1.angularVelocity = 100
spinner1.AngularDamping=100
spinner1.AngularImpluse= 100
spinner1.collision = ventCollide
spinner1.xF =10
spinner1.yF = 10
physics.newJoint(“pivot”,myCircle1,spinner1, myCircle1.x, myCircle1.y)
This is the code of one of the objects that seems to slow down the spinner spinning by the power of the vent:
rock=display.newImage(“Images/rock”, 180, 750)
sceneGroup:insert(rock)
physics.addBody(rock, rockBody)
rock.id = “gameRock”
rock.linearDamping = 0.3
rock.angularDamping = 2
rock.isBullet = true
rock.active = true
rock.bullet = false
Thanks I appreciate the assistance
I think I resolved the problem. I increased the density of the spinner so that it is quite a bit denser than the rock…
Thanks for responding and trying to help me though.
Have a great day.
Lori
Is your vent object a sensor and are you following this tutorial (3rd topic): http://coronalabs.com/blog/2013/02/19/more-physics-tricks-explained/ ?
Oh, and can you show some code from your app so we can examine it and comment on what might be causing the issue? I suggest the vent-related collision code.
Yes - I am using that tutorial. Below is my code.
I am using Composer and this first part of the code is in the TOP section where I place events.
– RETREIVE VENT FORCE VALUES
function getVentVals( angle, power )
local xF = math.cos( (angle-90)*(math.pi/180) ) * power
local yF = math.sin( (angle-90)*(math.pi/180) ) * power
return xF,yF
end
– VENT COLLISION HANDLER
function ventCollide( self,event )
local vent = event.other
if ( event.phase == “began” and vent.isVent == true ) then
self.xF = self.xF+vent.xF ; self.yF = self.yF+vent.yF
elseif ( event.phase == “ended” and vent.isVent == true ) then
self.xF = self.xF-vent.xF ; self.yF = self.yF-vent.yF
end
end
–handles actions in both the began and ended phases of the collision
– RUNTIME FORCE APPLICATION
function constantForce1()
if not ( spinner1.xF == 0 and spinner1.yF == 0 ) then
spinner1:applyForce( spinner1.xF, spinner1.yF, spinner1.x, spinner1.y )
end
end
This part of the code is in Scene Create:
–CONFIGURE WIND VENT
local vent1 = display.newRect( 0, 0, 80, 80 ) – THE SIZE OF THE VENT
physics.addBody(vent1, “kinematic”, { isSensor=true } )
vent1.isVisible = true
vent1.isVent = true --so that other objects are not considered vents in the collision handler
–vent1.rotation = 180 ;
vent1.x = 384 ; vent1.y = 484
vent1.xF, vent1.yF = getVentVals( vent1.rotation, 90 )
–SPINNER BUMPER
bumperBody.shape = spinnerBumperShape
myCircle1 = display.newCircle (384, 500,5)
sceneGroup:insert(myCircle1)
physics.addBody(myCircle1,“static”,{radius=5, bounce=0.5, friction =0.953})
spinner1 = display.newImage(“Images/SpinnerBumperlrg.png”, 384, 500)
sceneGroup:insert(spinner1)
physics.addBody(spinner1, {density =4, bounce=0.5, friction =0.153})
–I’ve been playing around with the items below to see if I can make it work
spinner1:applyTorque (1000)
spinner1.angularVelocity = 100
spinner1.AngularDamping=100
spinner1.AngularImpluse= 100
spinner1.collision = ventCollide
spinner1.xF =10
spinner1.yF = 10
physics.newJoint(“pivot”,myCircle1,spinner1, myCircle1.x, myCircle1.y)
This is the code of one of the objects that seems to slow down the spinner spinning by the power of the vent:
rock=display.newImage(“Images/rock”, 180, 750)
sceneGroup:insert(rock)
physics.addBody(rock, rockBody)
rock.id = “gameRock”
rock.linearDamping = 0.3
rock.angularDamping = 2
rock.isBullet = true
rock.active = true
rock.bullet = false
Thanks I appreciate the assistance
I think I resolved the problem. I increased the density of the spinner so that it is quite a bit denser than the rock…
Thanks for responding and trying to help me though.
Have a great day.
Lori