Geometric center of a character

Contributed Library Questions

alepoc69

Geometric center of a character

in Contributed Library Questions • 2 years ago

Is there a way to calculate the exact geometric center of any character?

My task is to inscribe a character inside a circle of given diameter.

Using textWidth you can determine the character's width, but cannot find the equivalent for character's height.

textAlign(CENTER, CENTER) doesn't work as it is referred to the font, not the char I want to print.

I'm sure it can be done at least using geomerative library but I don't know how.

Can you help me?
Thank you!

Alex

Replies(4)

nardove

Re: Geometric center of a character

2 years ago

I havent work with text in P5 too much, so I am completely going in the dark here. I think you may be able to use the text size in points to get the height in pixels, checkout this article to convert from pixels to point units, just need to reverse the formula... hope that helps

alepoc69

Re: Geometric center of a character

2 years ago

Hi nardove.

It is the "get the height in pixels" function I miss. I can print the chars on a PGraphics and then analize the image, but I would like to find a more elegant solution for this.

Given two characters (i.e. "a" and "y") I want to know their size: "y" is taller than "a", as "W" is wider than "i".
textWidth("a") and textWidth("y") give me the correct width of the chars. I need also a way to measure the distance between their lowest and topmost points.

With these two measures I can determine the geometric center of the chars and resize them perfectly to be inscribed in a circle...

etiennefr..

Re: Geometric center of a character

1 year ago

Hi "alepoc69", I'm just looking at the same problem. I try to reproduce, nicely, the C of the copyright sign.

The result is terrible. The character isn't centered et the aspect is dull.

Here is my code

// essai 3 copyright3

// je prends directement la lettre C

C copyright;

int dimx;

int dimy;

int dim=50;

PFont fC ;

void setup() {

size(800, 400, P3D);

dimx=width/2;

dimy=height/2;

noFill();

smooth();

fC = createFont("ArialMT",48,true);

}

void draw() {

background(255);

}

class C {

float xpos;

float ypos;

float r;

String txt;

C () {

xpos=dimx;

ypos=dimy;

r=(dim/2)-10;

txt="C";

}

void disp_cercle() {

stroke(0, 0, 255);

ellipseMode(CENTER);

stroke(255, 0, 0);

strokeWeight(4);

ellipse(xpos, ypos, 100, 100);

}

void disp_lettre() {

textAlign(CENTER);

textFont(fC,96);

fill(50);

text(txt,xpos,ypos);

fill(255);

}

gmassol

Re: Geometric center of a character

1 year ago

Use Geomerative lib. (there is a getCenter() function)
Check: http://www.ricardmarxer.com/geomerative/

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