Merge pull request #919 from jedgarpark/tft-gizmo-turtle-graphics

Added snowflake

Author: ladyada

TFT_Gizmo_Turtle_Graphics/turtle_snowflakes.py

@@ -0,0 +1,48 @@
+# Turtle Gizmo Snowflakes
+#==| Turtle Gizmo Setup start |========================================
+import time
+from random import randint
+import board
+import busio
+import displayio
+from adafruit_st7789 import ST7789
+from adafruit_turtle import turtle
+displayio.release_displays()
+spi = busio.SPI(board.SCL, MOSI=board.SDA)
+display_bus = displayio.FourWire(spi, command=board.TX, chip_select=board.RX)
+display = ST7789(display_bus, width=240, height=240, rowstart=80,
+                 backlight_pin=board.A3, rotation=180)
+turtle = turtle(display)
+#==| Turtle Gizmo Setup end |=========================================
+
+def draw_arm():
+    turtle.pendown()
+    for angle, length in arm_data:
+        turtle.forward(length)
+        turtle.left(angle)
+        turtle.forward(length)
+        turtle.backward(length)
+        turtle.right(2*angle)
+        turtle.forward(length)
+        turtle.backward(length)
+        turtle.left(angle)
+    turtle.penup()
+
+def draw_flake(arms):
+    turtle.penup()
+    turtle.home()
+    turtle.clear()
+    angle = 0
+    delta_angle = 360 // arms
+    for _ in range(arms):
+        turtle.home()
+        turtle.setheading(angle)
+        draw_arm()
+        angle += delta_angle
+    turtle.penup()
+    turtle.home()
+
+while True:
+    arm_data = [(randint(30, 80), randint(10, 40)) for _ in range(5)]
+    draw_flake(randint(5, 8)) #adjust number of arms here
+    time.sleep(5)