我有一个JS脚本,该脚本根据播放音乐的音量绘制椭圆及其振幅:
var song, analyzer;
function preload() {
song = loadSound('sounds/masterflash.mp3');
}
function setup() {
createCanvas(250, 250);
song.loop();
// create a new Amplitude analyzer
analyzer = new p5.Amplitude();
// Patch the input to an volume analyzer
analyzer.setInput(song);
}
function draw() {
background(0, 0, 0, 0)
// Get the average (root mean square) amplitude
var rms = analyzer.getLevel();
fill(0, 0, 0, 20);
stroke(255, 255, 255);
// Draw an ellipse with size based on volume
ellipse(width/3, height/3, 10+rms*200, 10+rms*200);
}
您可以在此处查看它在此处的示例
您可以在创建椭圆的最后一个代码上看到。我该怎么做同样的事情,但是它不用绘制椭圆,而是加载了我拥有的圆形.png图像?
您必须先预紧图像,然后绘制它。有关image()
尝试这样的
function preload() {
img = loadImage('images/laDefense.jpg');
song = loadSound('sounds/masterflash.mp3');
}
...
function draw() {
background(0, 0, 0, 0)
// Get the average (root mean square) amplitude
var rms = analyzer.getLevel();
fill(0, 0, 0, 20);
stroke(255, 255, 255);
image(img, width/3, height/3, 10+rms*200, 10+rms*200);
}