add constants for some Puyo Puyo Tetris graphics data

PPT graphics.txt

@@ -0,0 +1,11 @@
+resolution: 1920x1080
+
+active block size: 36,36
+preview block size (next): 28,28
+preview block size (after next): 22,22
+
+grid topleft (excluding partially obstructed topmost row): 308,160
+grid bottomright: 632, 844
+
+numRows (excluding partially obstructed topmost row): 20
+numCols: 10

README.md

@@ -1,5 +1,6 @@
-# T-Spin-Tutor
-Aids players in setting up T-Spins in Puyo Puyo Tetris
-Requirements:
--PyAutoGUI for analyzing the screen
--Tkinter for rendering the overlay
+# T-Spin-Tutor  
+Aids players in setting up T-Spins in Puyo Puyo Tetris  
+Requirements:  
+-Python 3.x  
+-PyAutoGUI for analyzing the screen  
+-Tkinter for rendering the overlay (this should already be installed if you are using a typical Python install)  

src/main.py

@@ -2,9 +2,25 @@
 import pyautogui
 import time
 import threading
+import random
+
+#constants
+sw = 1920
+sh = 1080
+bSize = 36
+bSizePrev = 28
+bSizePrevFuture = 22
+gridLeft = 308
+gridRight = 632
+gridTop = 160
+gridBot = 844
+numRows = 20
+numCols = 10
 
 class TkApp(threading.Thread):
     def __init__(self):
+        #init canvas to None so we can safely avoid a data race
+        self.canvas = None
         threading.Thread.__init__(self)
         self.start()
 
@@ -18,16 +34,27 @@ def run(self):
         self.root.wm_attributes("-topmost", 1)
         self.root.wm_attributes('-alpha', .1)
         self.root.overrideredirect(1)
-        self.root.geometry('1920x1080+0+0')
+        self.root.geometry('{0}x{1}+0+0'.format(sw,sh))
+
+        self.canvas = tk.Canvas(self.root, width=sw, height=sh)
+        self.canvas.pack()
+
         self.root.mainloop()
 
 def main():
-    #initialize an always on top, semitransparent window with no decorations, that covers the entire screen
+    #initialize an always on top, semitransparent TK window with no decorations, that covers the entire screen
     app = TkApp()
     #test screenshot abilities
-    time.sleep(4)
-    sc = pyautogui.screenshot()
-    print(sc.getpixel((760,223)))
+    while (True):
+        #stall until the tk app is initialized
+        if (app.canvas == None):
+            continue
+        sc = pyautogui.screenshot()
+        sc.getpixel((760,223))
+        app.canvas.delete("all")
+        x = gridLeft + bSize*random.randint(0,numCols-1)
+        y = gridTop + bSize*random.randint(0,numRows-1)
+        app.canvas.create_rectangle(x, y, x+bSize, y+bSize, fill='purple')
 
 if __name__ == "__main__":
     main()