Examples+

# Follow 1

### by based on code from Keith Peters

A line segment is pushed and pulled by the cursor.

### Featured functions

```
/**
* Follow 1
* based on code from Keith Peters.
*
* A line segment is pushed and pulled by the cursor.
*/
float x = 100;
float y = 100;
float angle1 = 0.0;
float segLength = 50;
void setup() {
size(640, 360);
strokeWeight(20.0);
stroke(255, 100);
}
void draw() {
background(0);
float dx = mouseX - x;
float dy = mouseY - y;
angle1 = atan2(dy, dx);
x = mouseX - (cos(angle1) * segLength);
y = mouseY - (sin(angle1) * segLength);
segment(x, y, angle1);
ellipse(x, y, 20, 20);
}
void segment(float x, float y, float a) {
pushMatrix();
translate(x, y);
rotate(a);
line(0, 0, segLength, 0);
popMatrix();
}
```

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.