Increment Decrement
Writing "a++" is equivalent to "a = a + 1". Writing "a--" is equivalent to "a = a - 1".
/**
* Increment Decrement.
*
* Writing "a++" is equivalent to "a = a + 1".
* Writing "a--" is equivalent to "a = a - 1".
*/
int a;
int b;
boolean direction;
void setup() {
size(640, 360);
colorMode(RGB, width);
a = 0;
b = width;
direction = true;
frameRate(30);
}
void draw() {
a++;
if(a > width) {
a = 0;
direction = !direction;
}
if(direction == true){
stroke(a);
} else {
stroke(width-a);
}
line(a, 0, a, height/2);
b--;
if(b < 0) {
b = width;
}
if(direction == true) {
stroke(width-b);
} else {
stroke(b);
}
line(b, height/2+1, b, height);
}
This example is for Processing 4+. If you have a previous version, use the examples included with your software. If you see any errors or have suggestions, please let us know.