Processing – Exemple 2 de traçage avec la souris

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int precedentX;
int precedentY;

void setup() {
  size (250, 250);
  precedentX = width / 2;
  precedentY = height / 2;
}

void draw () {
  if (mousePressed) {
    
    if (mouseButton == LEFT) {
      line (mouseX, mouseY, precedentX, precedentY);
      
      precedentX = mouseX;
      precedentY = mouseY;
    }
  }
}