java - 如何在按键时重置处理 Canvas ？

Question

我试图在处理中创建一个重置按钮，让用户按下一个键， Canvas 将重置并变为空白。我用了 keyPressed功能，但它不起作用。

void setup(){
 size(900,900);
 background(25, 57,0);
}

void draw(){
 if(mousePressed){
 ellipse(mouseX,mouseY,30,40);
 fill(255,255,255);
 stroke(200,100,100);
 }
 if(keyPressed==true){

 }

 saveFrame();
 }

Answer 1

只需将背景颜色重置为最初的颜色:

void setup(){
    size(900,900);
    background(25, 57,0);
}

void draw(){
    if(mousePressed){
       ellipse(mouseX,mouseY,30,40);
       fill(255,255,255);
       stroke(200,100,100);
    }
    if(keyPressed==true){
       background(25, 57,0); //resets background
    }
    saveFrame();
}