pitft/examples/circles.js

A NodeJS module that gives you access to the PiTFT framebuffer

var pitft = require("../pitft");

var fb = pitft("/dev/fb1"); // Returns a framebuffer in direct mode.  See the clock.js example for double buffering mode

// Clear the screen buffer
fb.clear();

var xMax = fb.size().width;
var yMax = fb.size().height;

for (var n=0; n<250; n++) {
    var x, y, radius, r, g, b;

    x = parseInt(Math.random() * xMax, 10);
    y = parseInt(Math.random() * yMax, 10);
    radius = parseInt(Math.random() * yMax / 2, 10);

    // Create a random color
    r = Math.random();
    g = Math.random();
    b = Math.random();

    fb.color(r, g, b);
    fb.circle(x, y, radius, false, 1); // Draw an outlined circle with a 1 pixel wide border
}

fb.clear();

for (var n=0; n<250; n++) {
    var x, y, radius, r, g, b;

    x = parseInt(Math.random() * xMax, 10);
    y = parseInt(Math.random() * yMax, 10);
    radius = parseInt(Math.random() * yMax / 2, 10);

    r = Math.random();
    g = Math.random();
    b = Math.random();

    fb.color(r, g, b);
    fb.circle(x, y, radius, true); // Draw a filled circle
}