new effect!

Author: PycraftDeveloper

src/spiraly.py

@@ -0,0 +1,84 @@
+import pygame
+import math
+import pmma
+
+pygame.init()
+pmma.init()
+
+display = pygame.display.set_mode((0, 0), pygame.FULLSCREEN)
+
+clock = pygame.time.Clock()
+
+class Line:
+    def __init__(self, x, y, dx, dy, seed):
+        self.start = (x, y)
+        self.dir = (dx, dy)
+        self.points = [self.start] * 2
+        self.color = pmma.ColorConverter()
+        self.color.set_red_seed(seed)
+        self.color.set_green_seed(seed+10)
+        self.color.set_blue_seed(seed+20)
+        self.dx_offset = pmma.Perlin(seed)
+        self.dy_offset = pmma.Perlin(seed+10)
+        self.new = True
+
+    def update(self):
+        pygame.draw.lines(display, self.color.generate_color_from_perlin_noise(pmma.get_application_run_time()/500, format=pmma.Constants.RGB, color_range=[0, 255]), False, self.points, width=3)
+        if self.points[-1][0] < 0 or self.points[-1][0] > display.get_width() or self.points[-1][1] < 0 or self.points[-1][1] > display.get_height():
+            self.new = False
+            return
+
+        self.points.append((
+            self.points[-1][0] + self.dir[0] * self.dx_offset.generate_1D_perlin_noise(self.dir[0]*len(self.points)/100, new_range=[0, 3]),
+            self.points[-1][1] + self.dir[1] * self.dy_offset.generate_1D_perlin_noise(self.dir[1]*len(self.points)/100, new_range=[0, 3])))
+
+lines = []
+n = 0
+
+def generate_lines(radius=50, num_points=200):
+    global lines, n
+    screen_width, screen_height = display.get_size()
+    cx, cy = screen_width // 2, screen_height // 2
+    new = [
+        Line(cx + int(radius * math.cos(2 * math.pi * i / num_points)),
+              cy + int(radius * math.sin(2 * math.pi * i / num_points)),
+              math.cos(2 * math.pi * i / num_points),
+              math.sin(2 * math.pi * i / num_points),
+              n)
+        for i in range(num_points)
+    ]
+    lines.extend(new)
+    n += 1
+
+generate_lines()
+
+surface = pygame.Surface(display.get_size(), pygame.SRCALPHA)
+alpha = 255
+while True:
+    for event in pygame.event.get():
+        if event.type == pygame.QUIT:
+            pygame.quit()
+            quit()
+
+    display.fill((0, 0, 0))
+    if alpha >= 0 and alpha <= 255:
+        surface.set_alpha(alpha)
+    display.blit(surface, (0, 0))
+    alpha -= 0.5
+
+    new = True
+    for line in lines:
+        line.update()
+        new &= not line.new
+
+    if new:
+        lines = []
+        generate_lines()
+
+    pmma.compute()
+    pygame.display.update()
+
+    if new:
+        surface.blit(display, (0, 0))
+        alpha = 255
+    clock.tick(60)