Agar

Agar.py

#           Agar
# Made for Pythonista on iPad

from scene import *
from random import randint
from math import pi, pow

BACKGROUND_COLOR = Color(0, 0, 0) # The color of the background.
BLOB_COLOR       = Color(0.5, 0.5, 1, 0.5) # The least background-like blob color possible.
TEXT_COLOR       = Color(0.8, 0.8, 1, 0.8) # The color of the mass counter text.

SANDBOX          = True # Sandbox mode (no motion, mass constant)

GENERATE         = True # Generate at launch?
GENERATE_NUM     = 100 # Number to generate if GENERATE == True

class Blob (object):
	x = 0
	y = 0
	z = 0
	
	motion = [0.0, 0.0]

	def __init__(self, x, y, z):
		self.x = x
		self.y = y
		self.z = z
		
		self.motion = [randint(-10, 10) / 100.0, randint(-10, 10) / 100.0]

	def draw(self, offsetx, offsety):
		if not SANDBOX:
			self.z -= 0.02
			
			self.x += self.motion[0]
			self.y += self.motion[1]
		
		fill(BLOB_COLOR.r, BLOB_COLOR.g, BLOB_COLOR.b, BLOB_COLOR.a)
		ellipse((self.x - (offsetx * self.z)) - (self.z / 2), (self.y - (offsety * self.z)) - (self.z / 2), self.z, self.z)
		fill(BACKGROUND_COLOR.r, BACKGROUND_COLOR.g, BACKGROUND_COLOR.b, 1 + (0 - (float(self.z) / 100)))
		ellipse((self.x - (offsetx * self.z)) - (self.z / 2), (self.y - (offsety * self.z)) - (self.z / 2), self.z, self.z)

def cmpBlobs(x, y): return cmp(x.z, y.z)

class MyScene (Scene):
	textx, texty = 10, 10
	offsetx, offsety = 0, 0
	blobs = []
	
	def setup(self):
		if GENERATE:
			for i in range(GENERATE_NUM):
				self.blobs.append(Blob(randint(-50, self.size.w + 50), randint(-50, self.size.h + 50), randint(10, 100)))

	def draw(self):
		totalMass = 0
		
		for blob in self.blobs:
			totalMass += pow((2.0/3.0)*pi*(blob.z/2), 3)
		
		self.blobs.sort(cmpBlobs)
		
		background(BACKGROUND_COLOR.r, BACKGROUND_COLOR.g, BACKGROUND_COLOR.b)
		
		g = gravity()
		
		if abs(self.offsetx - (g.x * 3)) > 0.01:
			if g.x * 3 < self.offsetx: self.offsetx -= abs(self.offsetx - (g.x * 3)) / 10
			else:                      self.offsetx += abs(self.offsetx - (g.x * 3)) / 10
		
		if abs(self.offsety - (g.y * 3)) > 0.01:
			if g.y * 3 < self.offsety: self.offsety -= abs(self.offsety - (g.y * 3)) / 10
			else:                      self.offsety += abs(self.offsety - (g.y * 3)) / 10
		
		tint(TEXT_COLOR.r, TEXT_COLOR.g, TEXT_COLOR.b, TEXT_COLOR.a)
		text('Total Mass: %skg' % (int(round(totalMass / 10000)*10)), alignment = 9, x = self.textx, y = self.texty)
		
		for blob in self.blobs:
			blob.draw(self.offsetx, self.offsety)
			if blob.z <= 1: self.blobs.remove(blob)
	def touch_began(self, touch):
		self.blobs.append(Blob(touch.location.x, touch.location.y, randint(10, 100)))

	def touch_moved(self, touch):
		pass

	def touch_ended(self, touch):
		pass

run(MyScene())

Python Project: Agar
Agar is a sphere-based game where you can create cool 3D artworks. In sandbox mode there is no movement whatsoever but if sandbox is disabled the mass of spheres decreases over time and spheres move about with constant velocity. Made for the iPad app Pythonista.