any difference in Sprite class between gideros 2014.10 and 2015.04.18?

pie · April 2015

I have a project with a menu which is working well in gideros 2014.10.
I am using GiderosCodingEasy Sprite:show() and Sprite:hide() - as long as Sprite:isHidden() to show/hide some buttons on certain situations.

In Gideros 2015.04.18 the buttons visually hide and show correctly, but they are still responding to touch inputs (which generates a bit of a mess since are overlapping, or "answering" where should be nothing

any idea on what could cause this? )

Thank you

ar2rsawseen · April 2015

@pie so what show and hide does is scales Sprite to 0 on hide and scales it back on show. And the idea was that hitTestPoint won't hit it if the size is 0

So what happens if you directly scale sprite to 0, does it still respond to input events? That would eliminate possibility of GiderosCodingEasy messing things up

SinisterSoft · April 2015

@ar2rsawseen - then is the size checked for either being zero and if they are not bother drawing it?

pie · April 2015

@ar2rsawseen I don't think it's giderosCodingEasy, I'd say it's something in gideros itself.

Try running attached project (which is a modified copy of button example with giderosCodingEasy)

On 2014.10 works as expected (hidden or scale = 0 => no response to input),
On 2015.04.18 sprite scaled to 0 still responds to input events.

Could Z axis have a role in this one?
Thank you

hgy29 · April 2015

Well I think changes in Matrices may have led to this issue. hitTestPoint works by applying inverse transforms of each sprite layer to windows coordinates until they are in local sprite space. The issue with scaling set to 0 is that not inverse matrix actually exists (division by 0) so results are undefined... could you try with setting scale to 0.0001 or something like that ?

pie · April 2015

@hgy29 thanks, I tried scaling down, up to 0.0000000000000000000000001 but the problem persists:
it doesn't seem to scale the sensible area below 0.1, at scale 0.01 the sensible area seems to get a weird size (I can tell only because I can click it with mouse - I am not certain of that).
getScale() returns 0.0099999997764826 instead of 0.01 if this could be related..
[edit. no it shouldn't be related, it's the same value I get in 2014.10

]

pie · April 2015

I need to fix this or I can't upgrade to latest gideros releases, does someone knows where to look at in the source code?
I am not sure I have the knowledge to fix it though, but I could always try

ar2rsawseen · April 2015

@pie unfortunately @hgy29 is on vacation now, but it should be somewhere in 2dsg, most probably Matrix related, so the first place I would look to is:

https://github.com/gideros/gideros/blob/master/2dsg/Matrices.cpp

pie · May 2015

After some attempts I have to admit that I have no chance to understand what's happening and how to fix it #-o

@hgy29 - I don't want to bother, but you seem to understand where and how this could be happening - if you have some time can you please think about a patch or a workaround?

I am stuck on 2014.10 due to this bug

Thank you

hgy29 · May 2015

@pie, I will look at this asap, tomorrow morning if possible.

hgy29 · May 2015

@pie, Good news for you!

I've been able to investigate further, the issue was indeed due to non-invertible matrix. Somehow the lib I used for matrix computation returns identity matrix for non invertible matrices (i.e determinant is near 0). I changed this behavior to adopt previous gideros way of doing, which is actually dividing by 0 and producing invalid matrix.
The fix should be available in next release.

pie · May 2015

@hgy29 great!

thank you

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