how to destroy a physics joint?

Questions
1

i have been playing with the fantastic codea for a couple months and this is my first communication on the forum.
First of all my complements to TTL for a great job!

For the game i am working on i would like to be able to destroy a joint between two bodies. Is this possible?

2

Here’s code that I posted in another discussion. I added code to destroy one of the joints when you do a double tap. Just run the program and when you’re ready, double tap the screen.

EDIT1: Changed and reposted the program.
EDIT2: Changed the program again to keep the line and joint circle after breaking the joint.
EDIT3: Changed the program again for a more realistic joint break.



supportedOrientations(PORTRAIT)
displayMode(FULLSCREEN)

function setup()
    dest=false
    c1 = physics.body(CIRCLE,0)
    c1.x = 400
    c1.y = 1000
    c1.type = STATIC    
    c2 = physics.body(CIRCLE,25)
    c2.x = 200
    c2.y = 900  
    c2.sensor=true  
    c3 = physics.body(CIRCLE, 25)
    c3.x = 500
    c3.y = 950  
    c3.sensor=true  
    c4 = physics.body(CIRCLE, 25)
    c4.x = 300
    c4.y = 850  
    c4.sensor=true  
    p1=physics.body(POLYGON,vec2(-10,25),vec2(-10,-25),vec2(10,-25),vec2(10,25)) 
    p1.x=400
    p1.y=850 
    p1.sensor=true  
    joint1 = physics.joint(REVOLUTE,c1,c2,c1.position)
    joint2 = physics.joint(REVOLUTE, c2, c3,vec2(c2.x,c2.y))  
    joint3 = physics.joint(REVOLUTE, c3, c4,vec2(c3.x,c3.y)) 
    joint4 = physics.joint(REVOLUTE, c4, p1,vec2(c4.x,c4.y))           
end

function draw()
    background(40, 40, 50)
    fill(255)
    strokeWidth(2)    
    line(c1.x,c1.y,c2.x,c2.y)
    line(c2.x,c2.y,c3.x,c3.y) 
    if not dest then
        line(c3.x,c3.y,c4.x,c4.y) 
    else
        line(c5.x,c5.y,c4.x,c4.y)
        ellipse(c5.x,c5.y,8)
    end
    line(c4.x,c4.y,p1.x,p1.y)           
    ellipse(c1.x,c1.y,8)        
    ellipse(c2.x,c2.y,8) 
    ellipse(c3.x,c3.y,8)  
    ellipse(c4.x,c4.y,8)  
    translate(p1.x,p1.y)
    rotate(p1.angle)
    points = p1.points
    for j = 1,#points do
        a = points[j]
        b = points[(j % #points)+1]
        line(a.x, a.y, b.x, b.y)    
    end
end

function touched(t)
    if t.state==BEGAN and t.tapCount==2 then
        dest=true 
        c5=physics.body(CIRCLE,25)
        c5.x=c3.x
        c5.y=c3.y
        c5.linearVelocity=c3.linearVelocity
        joint5 = physics.joint(REVOLUTE, c5, c4,vec2(c5.x,c5.y)) 
        joint3:destroy()
    end
end
3

Updated the above program to keep the line, joint circle and a more realistic joint break.

4

Perfect. Thank you very much!

5

Reading the description of reactionForce and reactionTorque of physics.joint, it seems that it is possible to break joints by applying forces to bodies rather than programmaticaly, but after trying quite a few things I cannot get it to work. Does anyone has a short working example, please?