Connecting zoom and object size ?

Programming Questions

fre3mind

Connecting zoom and object size ?

in Programming Questions • 1 year ago

Hey,

I got another question relating to the script I posted yesterday:

I have a map and I'm able to zoom in + out.

Now I have some popups you can push up when you click on diffrent places in the card.

The Problem:

When I'm zoomed in you can't see the popups anymore because they have a fixed size. Is there anyway I can scale it down/up when I'm zoomed ?

the zoom is generated here:

void mouseWheel(int delta) {
zoom = zoom+=delta;

the map is translated by:

translate(0, 0, zoom);

zoom is 400 when you start the programm.

I think the problem is that the popup is a class… That's why the translate doesn't affect the popup ( the popup.generate code is mentioned in another class!)

perhaps anyone can help me out with that :) Would be pretty great :)

Thanks a lot

cheers

Replies(10)

calsign

Re: Connecting zoom and object size ?

1 year ago

You want these objects to stay the same size, regardless of the zoom (z) level?

You could try disabling the depth test temporarily:

hint(DISABLE_DEPTH_TEST);
//Display the object
hint(ENABLE _DEPTH_TEST);

This is best for a hud or a GUI... if you want the objects to displayed at a specific location, you could try screenX() and screenY().

fre3mind

Re: Connecting zoom and object size ?

1 year ago

well no the popup has the size (180,-200) by a zoom of 400

when the zoom is up (500,600,etc) the size should get smaller so that the popup is still in sight (at the moment it's "huge" and outside of the window)

The same should happen when you zoom out (popup gets bigger…)

calsign

Re: Connecting zoom and object size ?

1 year ago

Why not just divide the dimensions of the popup by the zoom?

fre3mind

Re: Connecting zoom and object size ?

1 year ago

well you mean I should dived all sizes of every rect,triangle,etc and the fontsize by the zoom ?

calsign

Re: Connecting zoom and object size ?

1 year ago

No, divide the size of the popup.
You're working in 3D... so you have to resize something if you want it to appear the same size.

fre3mind

Re: Connecting zoom and object size ?

1 year ago

aahhhhh I just do't get it :(

the problem that I have is:

I have

scale (0.8) for the popup

AND

I have

scale (0.7) for the font

so I first scale everything to 0.8 and then the font another time to 0.7

and I don't get the math behind that…

Beyond that :

the zoom goes UP (for example from 400 to 600)

but the scale should shrink (for example from 0.8 to 0.6)

And I can't tell him to give me a negativ scale (than processing flips the popup upside down :/ )

calsign

Re: Connecting zoom and object size ?

1 year ago

It does indeed sound like you're getting confused...
Can you show the relevant code?

fre3mind

Re: Connecting zoom and object size ?

1 year ago

well yes indeed I'm (or it's my bad english , sorry for that this point ^^)

of course, here is the code:

void generate() {
pushMatrix();
rotateX(radians(-90));
scale(0.7);
noStroke();
//fill(128,205,225,255);
fill(98, 133, 142);
rectMode(CORNER);
rect (koordx, koordy, 180, -200);
triangle(koordx, koordy, koordx+30, koordy, koordx, koordy+30);
//
scale(0.8);
//fill(123,86,79);
//fill(255);
fill(173, 196, 160);
textFont(font);
//textMode(CORNER);
textSize(12);
text(standort, koordx+10, koordy-220, 1);
text(art + "preis Vorgestern: ", koordx+10, koordy-200, 1);
//fill(122);
text(preis_vorge + "€");
//fill(255);
text(art + "preis Gestern: ", koordx+10, koordy-180, 1);
//+-=
if (preis_geste<preis_vorge)
{
fill(0, 255, 0);
}
if (preis_geste == preis_vorge)
{
fill(255, 255, 0);
}
if (preis_geste>preis_vorge)
{
fill(255, 0, 0);
}
text(preis_geste + "€");
//fill(255);
fill(173, 196, 160);
//ende
text(art + "preis Heute: ", koordx+10, koordy-160, 1);
//+-=
if (preis_heute<preis_geste)
{
fill(0, 255, 0);
textSize(24);
Z=155;
}
if (preis_heute == preis_geste)
{
fill(255, 255, 0);
Z=160;
}
if (preis_heute>preis_geste)
{
fill(255, 0, 0);
Z=160;
}
text(preis_heute + "€", koordx+110, koordy-Z, 1);
//fill(255);
fill(173, 196, 160);
textSize(12);
text("Abweichung zum Durchschnitt: ", koordx+10, koordy-140, 1);
abweichung= (schnitt-preis_heute);
if (abweichung<preis_heute)
{
fill(255, 0, 0);
}
else
{
fill(0, 255, 0);
}
text(String.format("%.3f", abs(abweichung), abs(abweichung)) + "€");
popMatrix();
}
}

as you can see it's generate in the popup class the scales are in line 9 + 17

calsign

Re: Connecting zoom and object size ?

1 year ago

So... you have some transformation applied to the matrix already for the scale...
You scale by .7 for the rectangle, and an additional .8 for the text.

The .7 and the .8 are actually multiplied together to get the real scale, so that would be .56 of the original scale for the text...

At the beginning of the function (inside pushMatrix()) try adding a scale like this (assuming zoom is the zoom):

scale(1.0 / zoom);

At the very least, you should see some kind of effect. In may not be scaled properly (it may zoom in and out at a lesser or greater rate than it should)... if so, then you have to change the 1.0 accordingly.

I think it should work...

fre3mind

Re: Connecting zoom and object size ?

1 year ago

solved !

popupzoom = 20.0/(zoom/9);
if (popupzoom>1.6666666 || popupzoom<0)
{
popupzoom=1.6666666;
}
scale(abs(popupzoom));

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