Created
June 24, 2014 18:11
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My hello_world.pjs file
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function sketchProc(processing) { | |
// Override draw function, by default it will be called 60 times per second | |
processing.draw = function() { | |
// determine center and max clock arm length | |
var centerX = processing.width / 2, centerY = processing.height / 2; | |
var maxArmLength = Math.min(centerX, centerY); | |
function drawArm(position, lengthScale, weight) { | |
processing.strokeWeight(weight); | |
processing.line(centerX, centerY, | |
centerX + Math.sin(position * 2 * Math.PI) * lengthScale * maxArmLength, | |
centerY - Math.cos(position * 2 * Math.PI) * lengthScale * maxArmLength); | |
} | |
// erase background | |
processing.background(224); | |
var now = new Date(); | |
// Moving hours arm by small increments | |
var hoursPosition = (now.getHours() % 12 + now.getMinutes() / 60) / 12; | |
drawArm(hoursPosition, 0.5, 5); | |
// Moving minutes arm by small increments | |
var minutesPosition = (now.getMinutes() + now.getSeconds() / 60) / 60; | |
drawArm(minutesPosition, 0.80, 3); | |
// Moving hour arm by second increments | |
var secondsPosition = now.getSeconds() / 60; | |
drawArm(secondsPosition, 0.90, 1); | |
}; | |
} | |
var canvas = document.getElementById("canvas1"); | |
// attaching the sketchProc function to the canvas | |
var processingInstance = new Processing(canvas, sketchProc); |
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