互動技術概論
void setup(){
size(800,600);
}
void draw(){
if(mousePressed) background(255,0,0);
else background(0,255,0);
}
模擬小畫家筆觸,改顏色以及粗細等功能
void setup(){
  size(800,600);
}
void draw(){
  if(mousePressed) 
  line(mouseX,mouseY,pmouseX,pmouseY);
  strokeWeight(5);
  stroke(143,21,49);
}



 
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