Perlin Noise Coloring

bw_noise_color.py

# The noise value was calculated at each pixel, 
# using Processing’s built-in noise function. 
# This value was scaled up (by a factor of 10 to 100) and rounded, 
# yielding an integer for every pixel in the frame. 
# Colors were designated based on this number using a switch. 
# Finally, a point/dot was drawn at each pixel, in the assigned color. 
# The greater the scaling factor, the thinner and more numerous the noise bands. 


# Creates a 2D List of 0's, nCols x nRows large
def makeGrid(nCols, nRows):
    grid = []
    for i in range(nRows):
        # Create an empty list for each row
        grid.append([])
        for j in range(nRows):
            # Pad each column in each row with a 0
            grid[i].append(0)
    return grid


w, h  = 400, 500
factor  = 0.03
colr = makeGrid(w, h)


RED = [255, 0, 0]
GREEN = [0, 255, 0]
BLUE = [0, 0, 255]


def setup():
    global min_value, max_value
    size(w,h)
    min_value, max_value = 1000, 0
    for x in range(w):
        for y in range(h):
            colr[x][y] = noise(x * factor, y * factor)
                            
            if colr[x][y] < min_value:
                min_value = colr[x][y]
            if colr[x][y] > max_value:
                max_value = colr[x][y]
    print(min_value, max_value)    
    
    for x in range(w):
       for y in range(h):
           col = map(colr[x][y], min_value, max_value, 0, 255)
           stroke(col)
           point(x,y)

rainbow_laminate_perlin.py

# Creates a 2D List of 0's, nCols x nRows large
def makeGrid(nCols, nRows):
    grid = []
    for i in range(nRows):
        # Create an empty list for each row
        grid.append([])
        for j in range(nRows):
            # Pad each column in each row with a 0
            grid[i].append(0)
    return grid


w, h  = 800, 800
xfactor  = 50.3
yfactor  = 40.3

colr = makeGrid(w, h)

RED = [255, 0, 0]
GREEN = [0, 255, 0]
BLUE = [0, 0, 255]
YELLOW = [0, 255, 255]
MAGENTA = [255, 0, 255]
CYAN = [255, 255, 0]

color_list = [RED, RED, YELLOW,  BLUE,  CYAN, MAGENTA, GREEN]


def setup():
    global min_value, max_value
    size(w,h)
    min_value, max_value = 1000, 0
    for x in range(w):
        for y in range(h):
            colr[x][y] = noise(x /xfactor, y /yfactor)
                            
            if colr[x][y] < min_value:
                min_value = colr[x][y]
            if colr[x][y] > max_value:
                max_value = colr[x][y]
    print(min_value, max_value)    
    
    for x in range(w):
       for y in range(h):
           col = map(colr[x][y], min_value, max_value, 0, 6.99)
           stroke(*color_list[int(col)])
           point(x,y)