Thomas Francis

I remember you made a post about jumping through platforms, is it any different or easier to do with this with quickbox2d 1.0? Now that 1.0 is out, i’d like to update my blog post on my site with the 1.0 build. THEN, expand upon it with jumping through platforms.

Thanks,
Thomas Francis

JasonFuzz

Hi Zevan,

I am having troubles clearing everything on stage, basically i want to reset everything in between levels. I tried sim.destroy() or sim.stop() on a reset button but this only stops the simulation and you can still see the objects on screen.

I want to be able to clear everything when ever i want to so I can easily clear everything when a player fails or completes a level.

is there an easy way to do this?

sorry I not the great at actionscript and it seems this is a little above my level.

i would suggest creating an example of how to reset the simulation and graphics.

hope you can help, i will really appreciate it!!
thanks

Jason

Matty

I was actually able to fix this in my own project with a quick (somewhat hacky) way by altering b2Body to include a boolean called “isDeleted” that starts as false, and then changing b2World.DestroyBody() to check if isDeleted==true and then return so it doesn’t try to delete an object again. If isDeleted==false, it sets it to true and proceeds with the deletion.

The problem may have been that DestroyBody was getting called more than once on things (i.e. it was getting called on things already destroyed) resulting in a second decrement of m_bodyCount, which ultimately ended up putting it into the negatives after a several calls. I’m still not exactly sure why it was getting called twice — maybe you have an idea?

Hugo

Hi,

I’ve been working on a simulation where I need to know if a moving object (user controlled) makes contact with another solid, its working fine to detect the contacts but I now require the ability to detect which side of the solid it makes contact with.

The objective is to detect the user controlled object’s velocity at which it hit the solid but in order to know which velocity to use (vertical or horizontal) I need to know where it hits (top, bottom or left, right).

I was wondering if there is any shortcut for doing this without having to actually make all the calculations and such.

Any help or pointers would be appreciated, thanks.

lolo

they are errors :
RangeError: Error #1005: Array index is not a positive integer (-1).
at Error$/throwError()
at Array()
at Box2D.Dynamics::b2Island()
at Box2D.Dynamics::b2World/Solve()
at Box2D.Dynamics::b2World/Step()
at com.actionsnippet.qbox::QuickBox2D/onRender()

Ive

I’m putting together my first QuickBox2D game and these examples have been a huge help.
I’m having beginner issues destroying more complex objects though.

I have an arch shape using small boxes:

var RCX:Number = 250/30;
var RCY:Number = 8.5;
var pNum:int = 20;
var pWidth:Number = 28/30;
var pRadius:Number = 250/30;

for (var i:int=1; i < pNum; i++) {
var r:Number = Math.PI/pNum*i+Math.PI;
var curve:QuickObject=levelOne.addBox({x:RCX+pRadius*Math.cos(r), y:RCY+pRadius*Math.sin(r), width:pWidth, height:4/30, angle:r+Math.PI/2, density:0});
}

When I want to destroy it I am trying:
curve.destroy();
But it’s not working. The same thing happened when I tried destroying an array but I got around it by destroying each part individually which I can’t do here as they’re not named.

Any help would be great, thanks.

Orangatang

// use a distance joint instead of a group since isCurrentContact
// uses the QuickObject.body property

Hey Zevan Really amazing engine you made, so very useful. I wanted to know if it is possible to add to your engine a custom body with each grouped object as this would give them a lot more potential for control. I would do it myself but I do not think I am advanced enough in programming, and do not have time to understand the full box2d engine. If anyone else has done this please be kind enough to share it.