Processing 与键盘结合

1、使用键盘来改变输出的图形输入代码：void setup() {size(240, 120);smooth();}void draw() {background(204);line(20, 20, 220, 100);if (keyPressed) {//如果按下按键，显示直线line(220, 20, 20, 100);}}

3、显示按下的按键输入代码：void setup() {size(120, 120);textSize(64);textAlign(CENTER);}void draw() {background(0);text(key, 60, 80);}

5、Processing 识别不同的字符输入代码：void setup猾诮沓靥() {size(120, 120);smooth();}void draw() {background(204像粜杵泳);if (keyPressed) {if ((key == 'h') || (key == 'H')) {line(30, 60, 90, 60);}if ((key == 'n') || (key == 'N')) {line(30, 20, 90, 100);}}line(30, 20, 30, 100);line(90, 20, 90, 100);}输出效果如下图所示当没有按键按下时，输出为两条竖线当按下 n 或 N 时，输出为 N当按下 h 或 H 时，输出为 H