Perlin Terrain Map from Nature of Code book ported to python mode for processing

perlin_terrain_map.pyde

w = 1400
h = 1000
scl = 20
flying = 0
terrain = []

def setup():
    global terrain, rows, cols
    size(600, 600, P3D)
    cols = w / scl
    rows = h / scl
    terrain = [[0] * rows for col in range(cols)]
    
    fill(102, 204, 255, 80)

def draw():
    global flying, terrain, rows, cols
    flying -= 0.3
    yoff = flying
    
    
    for y in range(rows):
        xoff = 0

        for x in range(cols):
            terrain[x][y] = map(noise(xoff, yoff), 0, 1, -100, 150)
            xoff += 0.2
        
        yoff += 0.2
    
    translate(0, 400)
    background(0)
    noStroke()

    rotateX(PI/3);
    translate(-w / 3, -h /3 );

    for y in range(rows - 1):
        beginShape(TRIANGLE_STRIP)

        for x in range(cols):
            vertex(x*scl, y*scl, terrain[x][y])
            vertex(x*scl, (y+1)*scl, terrain[x][y+1])

        endShape()