Processsing 鼠标交互 学习

// Learning Processing
// Daniel Shiffman
// http://www.learningprocessing.com

// Example 3-2: mouseX and mouseY

boolean mousePress = false;

void setup() {
  size(640,360);
}

void draw() {
  // Try moving background() to setup() and see the difference!
  background(255);

  // Body
  stroke(0);
  fill(175);
  rectMode(CENTER);
  
  // mouseX is a keyword that the sketch replaces with the horizontal position of the mouse.
  // mouseY is a keyword that the sketch replaces with the vertical position of the mouse.
  rect(mouseX,mouseY,50,50);   
}

void mousePressed(){
  
  stroke(255, 0, 0);
   line(mouseX-10,mouseY, mouseX+10,mouseY);
   line(mouseX,mouseY-10, mouseX,mouseY+10);
   mousePress = true;

  
}

// Learning Processing
// Daniel Shiffman
// http://www.learningprocessing.com

// Example 3-5: mousePressed and keyPressed
void setup() {
  size(640, 360);
  background(255);
}

void draw() {
 // Nothing happens in draw() in this example!
}

// Whenever a user clicks the mouse the code written inside mousePressed() is executed.
void mousePressed() {
  stroke(0);
  fill(175);
  rectMode(CENTER);
  rect(mouseX,mouseY,16,16);
}

// Whenever a user presses a key the code written inside keyPressed() is executed.
void keyPressed() {
  background(255);
}

 

// Learning Processing
// Daniel Shiffman
// http://www.learningprocessing.com

// Example 3-5: mousePressed and keyPressed
void setup() {
  size(640, 360);
  background(255);
}

void draw() {
 // Nothing happens in draw() in this example!
}

// Whenever a user clicks the mouse the code written inside mousePressed() is executed.
void mousePressed() {
  stroke(255, 0, 0);
  strokeWeight(2);
  fill(175);
  rectMode(CENTER);
  //rect(mouseX,mouseY,16,16);
  circle(int(mouseX),int(mouseY),16);
}

// Whenever a user presses a key the code written inside keyPressed() is executed.
void keyPressed() {
  background(255);
}