color index test script for vectorio shapes.

tests/vectorio/color_index.py

@@ -0,0 +1,52 @@
+import time
+
+import board
+import displayio
+import rainbowio
+import vectorio
+
+
+def increment_color(shape):
+    if shape.color_index + 1 < len(shape.pixel_shader):
+        shape.color_index += 1
+    else:
+        shape.color_index = 0
+
+
+display = board.DISPLAY
+main_group = displayio.Group()
+
+palette = displayio.Palette(4)
+palette[0] = 0x125690
+palette[1] = 0x34BB90
+palette[2] = 0xAA1220
+palette[3] = 0xAA04BA
+
+circle = vectorio.Circle(pixel_shader=palette, radius=25, x=25, y=25)
+main_group.append(circle)
+
+rectangle = vectorio.Rectangle(pixel_shader=palette, width=50, height=50, x=25, y=75)
+main_group.append(rectangle)
+
+points = [(5, 5), (70, 20), (35, 35), (20, 70)]
+polygon = vectorio.Polygon(pixel_shader=palette, points=points, x=145, y=55)
+main_group.append(polygon)
+
+display.show(main_group)
+
+while True:
+    for x in range(25, display.width - 25):
+        circle.x = x
+        time.sleep(0.01)
+
+    increment_color(circle)
+    increment_color(rectangle)
+    increment_color(polygon)
+
+    for x in range(display.width - 25, 25, -1):
+        circle.x = x
+        time.sleep(0.01)
+
+    increment_color(circle)
+    increment_color(rectangle)
+    increment_color(polygon)