hex_grid.pyde

from __future__ import division

def setup():
    size(600, 600)
    
def draw():
    background(0)
    grid_elem = 10
    spac_size = width / (grid_elem + 1)
    v = spac_size * 1.5
    h = spac_size * sqrt(3)
    for ix in range(-1, grid_elem + 1):
        for iy in range(-1, grid_elem + 1):
            if iy % 2:
                fill(0, 200, 0)
                x = ix * h + h / 4.0
            else:
                fill(0, 0, 200)
                x = ix * h - h / 4.0
            es = spac_size - 1
            y = iy * v
            hexagon(x, y, es, rot=1) # rot=1 gira 90 graus
            
def hexagon(x, y, r, rot=0):
    pushMatrix()
    translate(x, y)
    beginShape()
    for i in range(6):
        sx = cos(i * TWO_PI / 6 + HALF_PI * rot) * r 
        sy = sin(i * TWO_PI / 6 + HALF_PI * rot) * r
        vertex(sx, sy)
    endShape(CLOSE)
    popMatrix()