Add example: [core] random sequence (#190)

Author: koto-moya

examples/core/core_random_sequence.py

@@ -0,0 +1,124 @@
+"""
+
+raylib version: 5.5.0.3
+
+raylib [core] example - random sequence
+
+"""
+
+from pyray import *
+
+
+class ColorRect:
+    color: Color
+    rect: Rectangle
+
+
+def generate_random_color_rect_sequence(
+    rect_count: int, rect_width: float, screen_width: int, screen_height: float
+) -> list:
+    rectangles = [ColorRect() for _ in range(rect_count)]
+
+    seq = load_random_sequence(rect_count, 0, rect_count - 1)
+    rect_seq_width = rect_count * rect_width
+    start_x = (screen_width - rect_seq_width) * 0.5
+
+    for i in range(rect_count):
+        rect_height = remap(seq[i], 0, rect_count - 1, 0, screen_height)
+        rectangles[i].color = Color(
+            get_random_value(0, 255),
+            get_random_value(0, 255),
+            get_random_value(0, 255),
+            255,
+        )
+        rectangles[i].rect = Rectangle(
+            start_x + i * rect_width,
+            screen_height - rect_height,
+            rect_width,
+            rect_height,
+        )
+    return rectangles
+
+
+def shuffle_color_rect_sequence(rectangles: list, rect_count: int):
+    seq = load_random_sequence(rect_count, 0, rect_count - 1)
+
+    for i in range(rect_count):
+        r1 = rectangles[i]
+        r2 = rectangles[seq[i]]
+
+        tmp_color = r1.color
+        tmp_h = r1.rect.height
+        tmp_y = r1.rect.y
+
+        r1.color = r2.color
+        r1.rect.height = r2.rect.height
+        r1.rect.y = r2.rect.y
+        r2.color = tmp_color
+        r2.rect.height = tmp_h
+        r2.rect.y = tmp_y
+
+
+screen_width = 800
+screen_height = 450
+
+init_window(screen_width, screen_height, "raylib [core] example - random sequence")
+set_target_fps(60)
+rect_count = 20
+rect_size = screen_width / rect_count
+rectangles = generate_random_color_rect_sequence(
+    rect_count, rect_size, screen_width, 0.75 * screen_height
+)
+
+while not window_should_close():
+
+    if is_key_pressed(KeyboardKey.KEY_SPACE):
+        shuffle_color_rect_sequence(rectangles, rect_count)
+
+    if is_key_pressed(KeyboardKey.KEY_UP):
+        rect_count += 1
+        rect_size = screen_width / rect_count
+        rectangles = generate_random_color_rect_sequence(
+            rect_count, rect_size, screen_width, 0.75 * screen_height
+        )
+
+    if is_key_pressed(KeyboardKey.KEY_DOWN):
+        if rect_count >= 4:
+            rect_count -= 1
+            rect_size = screen_width / rect_count
+            rectangles = generate_random_color_rect_sequence(
+                rect_count, rect_size, screen_width, 0.75 * screen_height
+            )
+
+    begin_drawing()
+
+    clear_background(RAYWHITE)
+
+    for i in range(rect_count):
+        draw_rectangle_rec(rectangles[i].rect, rectangles[i].color)
+        draw_text(
+            "Press SPACE to shuffle the current sequence",
+            10,
+            screen_height - 96,
+            20,
+            BLACK,
+        )
+        draw_text(
+            "Press UP to add a rectangle and generate a new sequence",
+            10,
+            screen_height - 64,
+            20,
+            BLACK,
+        )
+        draw_text(
+            "Press DOWN to remove a rectangle and generate a new sequence",
+            10,
+            screen_height - 32,
+            20,
+            BLACK,
+        )
+
+    draw_text(f"Count: {rect_count} rectangles", 10, 10, 20, MAROON)
+    draw_fps(screen_width - 80, 10)
+    end_drawing()
+close_window()