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TFTLibrary > TFT
circle
Description
Draws a circle on the screen.
The circle is drawn relative to its center point, which means the total diameter will always be an odd number.
Syntax
screen.circle(xPos, yPos, radius);
Parameters
- xPos : int, the location of the center of the circle on the x axis
- yPos : int, the location of the center of the circle on the y axis
- radius : int, the radius of the circle
Returns
int : the width of the screen in pixels
Example
#include <SPI.h>
#include <TFT.h> // Arduino TFT library
#define cs 10
#define dc 9
#define rst 8
TFT screen = TFT(cs, dc, rst);
void setup() {
// initialize the screen
screen.begin();
// make the background black
screen.background(0,0,0);
// set the stroke color to white
screen.stroke(255,255,255);
// set the fill color to grey
screen.fill(127,127,127);
// draw a circle in the center of screen
screen.circle(screen.width()/2, screen.height()/2, 10);
}
void loop() {
}
#include <TFT.h> // Arduino TFT library
#define cs 10
#define dc 9
#define rst 8
TFT screen = TFT(cs, dc, rst);
void setup() {
// initialize the screen
screen.begin();
// make the background black
screen.background(0,0,0);
// set the stroke color to white
screen.stroke(255,255,255);
// set the fill color to grey
screen.fill(127,127,127);
// draw a circle in the center of screen
screen.circle(screen.width()/2, screen.height()/2, 10);
}
void loop() {
}
See also
Corrections, suggestions, and new documentation should be posted to the Forum.
The text of the Arduino reference is licensed under a Creative Commons Attribution-ShareAlike 3.0 License. Code samples in the reference are released into the public domain.
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