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Author: anserwaseem

ex11_1ManuallyGrowingCA.pyde

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+# Using the keyPressed() function (for reference, see Chapter 10) to manually grow the CA.
+
+GRID_H=60 #grid height
+GRID_W=60 #grid width
+SZ=18 #size of cell
+
+def createCellList():
+        '''Creates a big list of OFF cells with
+        one ON Cell in the center'''
+        newList=[]#empty list for cells
+        #populate the initial cell list
+        for j in range(GRID_H):
+            newList.append([]) #add empty row
+            for i in range(GRID_W):
+                newList [j].append(Cell(i,j,0)) #add off Cells or zeroes
+        #center cell is set to on
+        newList [GRID_H//2][GRID_W//2].state = 1
+        return newList
+
+class Cell:
+    def __init__(self,c,r,state=0): #initially, cell's state is OFF
+        self.c = c
+        self.r = r
+        self.state = state
+
+    def display(self):
+        if self.state == 1:
+            fill(0) #black
+        else:
+            fill(255) #white
+        rect(SZ*self.r,SZ*self.c,SZ,SZ)
+
+    def checkNeighbors(self):
+        if self.state == 1: 
+            return 1 #on Cells stay on
+        
+        neighbs = 0 #check the neighbors
+        # check neighbors on left, right, down, up of the current cell
+        for dr,dc in [[-1,0],[1,0],[0,-1],[0,1]]:
+            try:
+                if cellList[self.r + dr][self.c + dc].state == 1:
+                    neighbs += 1
+            except IndexError:
+                continue        
+        if neighbs in [1,4]:
+            return 1
+        else:
+            return 0
+
+def setup():
+    global SZ,cellList
+    size(600,600)
+    noStroke()
+    SZ=width // GRID_W
+    cellList = createCellList()
+
+def draw():
+    global generation,cellList
+    for row in cellList:
+        for cell in row:
+            cell.display()
+
+def update(cellList):
+    newList = []
+    for r,row in enumerate(cellList):
+        newList.append([])
+        for c,cell in enumerate(row):
+            newList[r].append(Cell(c,r,cell.checkNeighbors()))
+    return newList[::]
+
+#as the mouse clicks, update the cellList
+def mouseClicked():
+    global cellList
+    cellList = update(cellList)