# Tumbling Arrows

A tiny sketch in Processing on my way somewhere else. I was playing about with flow fields but needed a way to visualize what was happening in a bigger sketch so I created a little test program to draw arrows at specific rotations around a circle using pushMatrix, translate and rotate.

What started as a test piece turned into something that looked quite nice standing on its own (see screenshot). So here it is.

```
size(1500, 500)
stroke(0)
def arrow(x, y, len, head, angle):
pushMatrix()
translate(x, y) # move to blunt end of arrow
rotate(radians(angle))
line(0, 0, len, 0) # shaft
line(len, 0, len - head, - head) # left hand of head
line(len, 0, len - head, + head) # right hand of head
popMatrix()
arrows = 12
angle = 0.0
delta = 360.0 / arrows
arrow_length = 50
arrow_head = 5
x = 50
y = 150
for i in range(arrows):
arrow(x, y, arrow_length, arrow_head, angle) # rotate from 3 o clock
angle += delta
x += arrow_length + arrow_head
```