Complicated Zoom To Finger Pinch & Spread

RedlerTech

Hey Everyone,
So for my next project an important part of it is going to be zoom in to see more clear. Now, I know it is possible to zoom & I know it's possible to read the finger movements because of Stormy's paper-toss template. But how would I create the zoom effect by the person pinching and spreading 2 fingers as you would in Safari on the iPad lets say. Depending on how far you spread, the more zoom. With a min & max limit of how far you can zoom in and out. Is this possible?

Matt

JohnPapiomitis

get the magnitude between touch 1 x and touch 2 x, then you can multiply that if u need a bigger number and go off that for ur zoom

RedlerTech

Can you explain a little more please? Like would I do:

Constrain scene camera size width & height to:

Magnitude(Touch1X-Touch2X,Touch1Y-Touch2Y)

I don't think that would work.

Matt

old_kipper

its possible



Also I think that Darren has a parachuting template that has some very cool zoom stuff in it.

kipper

RedlerTech

Is that your app? How do I use the Touch1 & 2 to determine rotation of the camera, like how it determined the rotation of the image in the video?

Matt

JohnPapiomitis

NextGen said:
Can you explain a little more please? Like would I do:

Constrain scene camera size width & height to:

Magnitude(Touch1X-Touch2X,Touch1Y-Touch2Y)

I don't think that would work.

Matt

no you would have a attribute constrained to the mangiutde of touch 1 x and touch 2 x, and also have a attirubte that checks if it grew or got smaller so you know weather to add or subtract.then like i said that might be a small number so maybe multiply by 3 or something just to get it bigger. Then depending on the other attribute to detect a pull out or pinch in, you would add or subtract that from the screen size width and or heighth.

THeres some other little tweaks and things you might need to add but thatll get you started and should give u a idea of what u wanna go for

Roderic

Hey old_kipper,

That video you showed, would you be willing to share the code that does that? I've also been playing with the pinch and zoom template but I can't seem to get it smooth.

Your help will be much appreciated.

Thanks!