multi_loop_grid

# Draw a rectangular grid, and display a short description of Processing
# Copyright 2022, 2023 Roland Richter                    [Processing.py]

# This sketch shows you how to ...
# - [ ] draw a rectangular grid with two nested for loops

def setup():
    # Create a 900×600 canvas (plus a small margin) with black background
    size(904, 604)
    ellipseMode(CENTER)


def draw():
    background(0)

    # This sentence is taken from https://py.processing.org/
    words = ["Since", "2001", "Processing", "has", "promoted", "software",
            "literacy", "within", "the", "visual", "arts", "and",
            "visual", "literacy", "within", "technology"]

    # Set coordinates of the circles' centers (x and y separately)
    # TRY to use list comprehension to compute these numbers;
    #     best with the help of the width and height variables.
    cxs = [112, 112+225, 112+2*225, 112+3*225]
    cys = [75, 75+150, 75+2*150, 75+3*150]

    # TRY to  reverse y coordinates, or both x and y coordinates.
    # TRY to "reverse" the text as well: "Since" -> "ecniS", "2001" -> "1002", ...
    if mousePressed and mouseButton == LEFT:
        cxs.reverse()

    # Draw circles with white lines and black interior
    strokeWeight(4)
    stroke(255)
    fill(0)

    # First draw 4 × 4 circles, ...
    for cx in cxs:
        for cy in cys:
            circle(cx, cy, 215)

    # ... (just for fun, add a little offset to the word positions) ...
    off = 8.0 * sin(radians(4*frameCount))

    # ... then place one word within each circle.
    textSize(36)
    textAlign(CENTER, CENTER)
    fill(255)

    i = 0
    for cy in cys:
        for cx in cxs:
            sign = +1 if i % 2 == 0 else -1
            text(words[i], cx, cy + sign*off)
            i += 1


# ----------------------------------------------------------------------
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program.  If not, see <https://www.gnu.org/licenses/>.