Grafik_bis_zum_Abendrot

# Sonnenuntergang in Anlehnung an "Carla's Island",           [Mu: Pygame Zero]
# eine bahnbrechende Computeranimation von Nelson Max (1981),
# siehe z.B. https://archive.org/details/CarlasIsland
# Copyright 2021--2023 Roland Richter

from pgzhelper import *

# Fenstergröße 800 x 500
TITLE = "Grafik bis zum Abendrot"
WIDTH = 800
HEIGHT = 500

# Bilder stammen von https://kenney.nl/assets/planets
planet = Actor("kenney_planets/planets/planet08.png")
planet.pos = (WIDTH-40, 0)
# Setze die Größe des Actors auf 10 % der Originalgröße
planet.scale = 0.1

frame_count = 0
total_time = 0.0
delta_times = []

light_sky_blue = (135, 206, 235)
warm_black = (0, 66, 66)

def lerp_color(beg_clr, end_clr, factor):
    return (round((1.-factor) * beg_clr[0] + factor * end_clr[0]),
            round((1.-factor) * beg_clr[1] + factor * end_clr[1]),
            round((1.-factor) * beg_clr[2] + factor * end_clr[2]))

def draw():
    # Zähle die Anzahl der gezeichneten frames mit
    global total_time, frame_count
    frame_count += 1

    # Setze den Hintergrund auf eine "interpolierte Farbe"
    if frame_count < 200:
        factor = 0.0
    elif frame_count < 400:
        factor = ((frame_count-200) / 200.)
    else:
        factor = 1.0

    bg_color = lerp_color(light_sky_blue, warm_black, factor)
    screen.fill(bg_color)

    # Zeichne eine Insel in "La Salle Green"
    screen.draw.filled_circle((0.5*WIDTH, HEIGHT), 0.3*HEIGHT, "#087830")

    # Male das Meer quer über den unteren Teil des Fensters in "Dark cerulean"
    screen.draw.filled_rect(Rect((0, 0.8*HEIGHT), (WIDTH, HEIGHT)), "#08457E")

    # Male eine weiße Wolke ...
    screen.draw.filled_circle((0.75*WIDTH, 0.30*HEIGHT), 42, "white")
    screen.draw.filled_circle((0.72*WIDTH, 0.31*HEIGHT), 42, "white")
    screen.draw.filled_circle((0.77*WIDTH, 0.28*HEIGHT), 42, "white")
    screen.draw.filled_circle((0.79*WIDTH, 0.32*HEIGHT), 42, "white")

    # Male einen Leuchtturm ...
    screen.draw.filled_rect(Rect((0.4*WIDTH, 0.6*HEIGHT), (20, 80)), "#F0EAD6")

    # ... mit einem Blinklicht, dessen Farbe zwischen rot und schwarz hin-
    # und herspringt.
    if frame_count % 120 < 20:
        screen.draw.filled_circle((0.4*WIDTH+10, 0.6*HEIGHT), 10, "red")
    else:
        screen.draw.filled_circle((0.4*WIDTH+10, 0.6*HEIGHT), 10, "black")

    # Schreibe Informationen in die linke obere Ecke
    avg_delta = sum(delta_times) / len(delta_times)
    frame_rate = 1.0 / avg_delta
    info = "frame " + str(frame_count) + " (" + "{:.2f}".format(frame_rate) + " fps)"
    screen.draw.text(info, (10, 10), color="white", fontsize=24)

    # Zeichne den Planeten
    planet.draw()

    # Hoppla! Der Planet sollte doch hinter dem Meer und der Wolke verschwinden.
    # PROBIERE, den Planeten so zu zeichnen, dass er hinter dem Meer und hinter
    # der Wolke verschwindet.


def update(delta_time):
    # delta_time ist die Zeit in Sekunden, die seit dem letzten Aufruf vergangen sind:
    # https://pygame-zero.readthedocs.io/en/stable/hooks.html?highlight=update()#update
    global total_time, delta_times
    total_time += delta_time

    delta_times.append(delta_time)
    if len(delta_times) > 10:
        delta_times.pop(0)

    # Bewege den Planeten nach links unten
    planet.x -= 2
    planet.y += 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/>.