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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 ( ) { }

See also

• TFT
• rect()
• line()
• point()

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