Revision: 310
http://eos-game.svn.sourceforge.net/eos-game/?rev=310&view=rev
Author: cduncan
Date: 2007-10-24 00:47:45 -0700 (Wed, 24 Oct 2007)
Log Message:
-----------
Formative script to generate explosion animations. Considering how crude it is the results are excellent IMO.
Added Paths:
-----------
splode.py
Added: splode.py
===================================================================
--- splode.py (rev 0)
+++ splode.py 2007-10-24 07:47:45 UTC (rev 310)
@@ -0,0 +1,173 @@
+import sys
+import pygame
+from pygame.locals import *
+import random
+import time
+import itertools
+
+pygame.init()
+screen = pygame.display.set_mode((800,600))
+
+class Particle:
+
+ def __init__(self, color, pos, vel=(0,0), drag=0, initial_size=1, initial_expand=0.1, accel=1.5, accel_time=8, deccel=1.05, deccel_time=80):
+ self.velx, self.vely = vel
+ self.x = float(pos[0])
+ self.y = float(pos[1])
+ self.drag = 1.0 - drag
+ self.size = float(initial_size)
+ self.expand = initial_expand
+ self.rect = pygame.Rect(pos[0], pos[1], initial_size, initial_size)
+ self.orig_color = color
+ self.accel = accel
+ self.accel_time = accel_time
+ self.deccel = deccel
+ self.deccel_time = deccel_time
+
+ def update(self):
+ width = min(int(self.size), 500)
+ self.image = pygame.Surface((width, width), SRCALPHA, 32)
+ self.x += self.velx
+ self.y += self.vely
+ self.rect = self.image.get_rect(centerx=self.x, centery=self.y)
+ self.velx *= self.drag
+ self.vely *= self.drag
+ color = [max(min(int(c * self.expand), 255), 0) for c in self.orig_color]
+ pygame.draw.circle(self.image, color, self.image.get_rect().center, int(width / 2))
+ self.size += self.expand
+ if self.accel_time:
+ self.expand *= self.accel
+ self.accel_time -= 1
+ elif self.deccel_time:
+ self.expand /= self.deccel
+ self.deccel_time -= 1
+
+class Particle:
+
+ def __init__(self, color, pos, vel=(0,0), drag=0, initial_size=1, max_size=1, size_interval=2, fade_start=sys.maxint, fade_end=sys.maxint):
+ self.velx, self.vely = vel
+ self.x = float(pos[0])
+ self.y = float(pos[1])
+ self.drag = drag
+ self.size = float(initial_size)
+ self.max_size = float(max_size)
+ self.size_interval = float(size_interval)
+ self.fade_start = fade_start
+ self.fade_end = fade_end
+ self.frame = 0
+ self.rect = pygame.Rect(pos[0], pos[1], initial_size, initial_size)
+ self.color = list(color)
+
+ def update(self):
+ width = int(self.size)
+ self.image = pygame.Surface((width, width), SRCALPHA, 32)
+ self.x += self.velx
+ self.y += self.vely
+ self.rect = self.image.get_rect(centerx=self.x, centery=self.y)
+ self.velx -= self.velx * self.drag
+ self.vely -= self.vely * self.drag
+ if self.frame < self.fade_start:
+ color = [max(min(int(c), 255), 0) for c in self.color]
+ else:
+ fade = float(self.fade_end - self.frame) / float(self.fade_end - self.fade_start)
+ color = [max(min(int(c * fade), 255), 0) for c in self.color]
+ pygame.draw.circle(self.image, color, self.image.get_rect().center, int(width / 2))
+ self.frame += 1
+ if self.size < self.max_size:
+ self.size += (self.max_size - self.size) / self.size_interval
+
+particles = []
+rect = pygame.Rect(0,0,0,0)
+
+
+for i in range(50):
+ red=random.randint(100,200)
+ green=random.randint(50, red)
+ blue=random.randint(50, green)
+ p = Particle(
+ color=(red, green, blue, 10),
+ pos=(200,200), #(200 + random.gauss(40, 15), 200 + random.gauss(40, 15)),
+ vel=(random.gauss(0, 4), random.gauss(0, 4)),
+ drag=random.gauss(0.15, .01),
+ max_size=random.gauss(150, 10),
+ size_interval=random.uniform(35,80),
+ fade_start=random.gauss(5,1),
+ fade_end=100)
+ particles.append(p)
+ rect.union_ip(p.rect)
+
+for i in range(250):
+ red=random.randint(150,255)
+ green=random.randint(20, red)
+ blue=random.randint(0, green)
+ p = Particle(
+ color=(red, green, blue, 50),
+ pos=(200,200), #(200 + random.gauss(40, 15), 200 + random.gauss(40, 15)),
+ vel=(random.gauss(0, 4), random.gauss(0, 4)),
+ drag=random.gauss(0.35, .02),
+ max_size=random.gauss(40, 10),
+ size_interval=random.uniform(5,70),
+ fade_start=random.gauss(5,1),
+ fade_end=70)
+ particles.append(p)
+ rect.union_ip(p.rect)
+
+
+for i in range(500):
+ bright=random.gauss(200,20)
+ p = Particle(
+ color=(bright, bright, bright, 150),
+ pos=(200,200),
+ vel=(random.gauss(0, 3), random.gauss(0, 3)),
+ drag=0.1,
+ initial_size=1,
+ max_size=random.gauss(5, 1),
+ size_interval=random.uniform(60,100),
+ fade_start=random.gauss(15,12),
+ fade_end=random.gauss(80,5))
+ particles.append(p)
+ rect.union_ip(p.rect)
+
+for i in range(250):
+ red=random.randint(150,255)
+ green=random.randint(20, red)
+ blue=random.randint(0, green)
+ p = Particle(
+ color=(red, green, blue, 50),
+ pos=(200,200), #(200 + random.gauss(40, 15), 200 + random.gauss(40, 15)),
+ vel=(random.gauss(0, 4), random.gauss(0, 4)),
+ drag=random.gauss(0.35, .01),
+ max_size=random.gauss(40, 10),
+ size_interval=random.uniform(5,70),
+ fade_start=random.gauss(5,1),
+ fade_end=random.gauss(70, 10))
+ particles.append(p)
+ rect.union_ip(p.rect)
+
+frames = []
+slomo = False
+for i in range(200):
+ image = pygame.Surface(rect.size, SRCALPHA, 32)
+ for p in particles:
+ p.update()
+ image.blit(p.image, p.rect)
+ rect.union_ip(p.rect)
+ frames.append(image)
+ for event in pygame.event.get():
+ if event.type == QUIT or (
+ event.type == KEYDOWN and event.key == K_ESCAPE):
+ raise SystemExit
+screen_center = screen.get_rect().center
+for image in itertools.cycle(frames):
+ screen.fill((0, 0, 0))
+ #image = pygame.transform.rotozoom(image, 0, .5)
+ screen.blit(image, image.get_rect())
+ pygame.display.flip()
+ if slomo:
+ time.sleep(0.1)
+ for event in pygame.event.get():
+ if event.type == QUIT or (
+ event.type == KEYDOWN and event.key == K_ESCAPE):
+ raise SystemExit
+ if event.type == KEYDOWN and event.key == K_SPACE:
+ slomo = not slomo
Property changes on: splode.py
___________________________________________________________________
Name: svn:keywords
+ Id
Name: svn:eol-style
+ native
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