From dfb9aef6f7c5dc12129110c29ff53294559b0fd8 Mon Sep 17 00:00:00 2001
From: lucaconte <luca.conte@targatelematics.com>
Date: Tue, 25 Jun 2019 16:02:00 +0200
Subject: [PATCH] grayscale & divergenza in Y

---
 cfg.ini       | 20 +++++++------
 divergenza.py | 78 +++++++++++++++++++++++++++++----------------------
 2 files changed, 56 insertions(+), 42 deletions(-)

diff --git a/cfg.ini b/cfg.ini
index e8b76d1..f8f834e 100644
--- a/cfg.ini
+++ b/cfg.ini
@@ -2,14 +2,16 @@
 FG_R_COLOR = 0.0
 FG_G_COLOR = 0.0
 FG_B_COLOR = 0.0
-ServerAliveInterval = 45
-Compression = yes
-CompressionLevel = 9
-ForwardX11 = yes
+PAGE_W = 3508
+PAGE_H = 2480 
+OFFSET_X = 100
+OFFSET_Y = 500
+GRID_W = 24
+GRID_H = 13
+SQUARE_SIZE=100
 
-[bitbucket.org]
-User = hg
 
-[topsecret.server.com]
-Port = 50022
-ForwardX11 = no
+RANDOM_STEP = 0.01
+DAMPEN = 2.25
+LINE_WIDTH = 5
+
diff --git a/divergenza.py b/divergenza.py
index 5c21e84..9792429 100755
--- a/divergenza.py
+++ b/divergenza.py
@@ -16,31 +16,44 @@ def plotSquares(ctx):
     for i in range(0,w-1):
         rsum += i*rs # add to the random value
         ctx.save()
-        ctx.translate(s*i+1.1**i*dp, 0)
-        for j in range(0,h-1):
-		
-                rv = random.uniform(-rsum, rsum)
-		# here comes the box :-)
-		#box = shapes.square(s)
-		
-		# box position
-		#curr_cx = - w*s/2 + i*s + rv*dp ;	curr_cy = - h*s/2 + j*s + rv*dp
-		#   transforms.center_at(box, [curr_cx, curr_cy])
+        ctx.translate(s*i + deltaX(i), 0)
+        for j in range(0,h):
 		#
-		#  # rotate the box of rv degrees around its center
-		#  transforms.rotate(box, rv, pivot=(curr_cx, curr_cy))
-		# draw the damn box	
-		#  plotter.write(box)
-                #
-                #ctx.rotate(math.pi * 1 / 4)
-                ctx.translate(0, s)
-                ctx.save()
-                ctx.rotate(rv)
-                ctx.rectangle(0,0, s, s)
-                ctx.restore()
-                ctx.stroke()
+            rv = random.uniform(-rsum, rsum)
+            print str(abs(rv))
+            #grey =  translate(abs(rv),0,2,0,0.7)    
+            #ctx.set_source_rgb(grey,grey,grey)
+            ctx.save()
+            #remove 0 or relace it with 1 if ypu want Y devercence
+            ctx.translate(0, s*j + deltaY(i,j) * 0.8 )
+            ctx.rotate(rv)
+            ctx.rectangle(s/2,s/2, s, s)
+            ctx.restore()
+            ctx.stroke()
+            #ctx.fill()
         ctx.restore()
 
+def deltaY(i,j):
+#    return float(1.1*translate(j,0,h-1,-i*0.3,i*0.3)**2)
+#    print "nterpolazione di "+ str(j) + " : " + str(translate(j,-h/2,h/2,-math.pi/2,math.pi/2))
+#    return float(math.tan(translate(j,0,h-1,-math.pi/2,math.pi/2))) 
+    return float(math.tan(translate(j,0,h,-1.37,1.56))*i) 
+
+def deltaX(i):
+    return float(1.31**i*dp)
+
+def translate(value, leftMin, leftMax, rightMin, rightMax):
+    # Figure out how 'wide' each range is
+    leftSpan = leftMax - leftMin
+    rightSpan = rightMax - rightMin
+
+    # Convert the left range into a 0-1 range (float)
+    valueScaled = float(value - leftMin) / float(leftSpan)
+
+    # Convert the 0-1 range into a value in the right range.
+    if(value==h/2):
+        return 0
+    return rightMin + (valueScaled * rightSpan)
 
 if len(sys.argv) < 2:
     print("Plz specify output file as argument")
@@ -49,27 +62,26 @@ if len(sys.argv) < 2:
 config = configparser.ConfigParser()
 config.read('cfg.ini')
 #float RGB touple
-FG_RGB_COLOR=(config['DEFAULT']['FG_R_COLOR'],config['DEFAULT']['FG_G_COLOR'],config['DEFAULT']['FG_B_COLOR'])
-print type(config['DEFAULT']['FG_R_COLOR'])
+FG_RGB_COLOR=(float(config['DEFAULT']['FG_R_COLOR']),float(config['DEFAULT']['FG_G_COLOR']),float(config['DEFAULT']['FG_B_COLOR']))
 #A4 in 300 DPI
-width, height = 3508,2480
-offsetX, offsetY = 100,500
+width, height = int(config['DEFAULT']['PAGE_W']),int(config['DEFAULT']['PAGE_H'])
+offsetX, offsetY = int(config['DEFAULT']['OFFSET_X']),int(config['DEFAULT']['OFFSET_Y'])
 
-w = 22 # width (how many squares - es. 22)
-h = 12 # height (how many squares - es. 12)
-s = 100 # square size  (es. 15)
+w = int(config['DEFAULT']['GRID_W']) # width (how many squares - es. 22)
+h = int(config['DEFAULT']['GRID_H']) # height (how many squares - es. 12)
+s = int(config['DEFAULT']['SQUARE_SIZE'])# square size  (es. 15)
 
-rs = 0.01 # random step (rotation increment in degrees)
-dp = 2.25 # dampen (soften random effect for position)
+rs = float(config['DEFAULT']['RANDOM_STEP']) # random step (rotation increment in degrees)
+dp = float(config['DEFAULT']['DAMPEN']) # dampen (soften random effect for position)
 rsum = 0 # dummy initial value for rsum
 
-line_width = 2
+line_width = int(config['DEFAULT']['LINE_WIDTH'])
 
 
 surface = cairo.PDFSurface (sys.argv[1],width,height)
 ctx = cairo.Context (surface)
 
-ctx.set_source_rgb(config['DEFAULT']['FG_R_COLOR'],config['DEFAULT']['FG_G_COLOR'],config['DEFAULT']['FG_B_COLOR'])
+ctx.set_source_rgb(FG_RGB_COLOR[0],FG_RGB_COLOR[1],FG_RGB_COLOR[2],)
 ctx.set_line_width(line_width)
 ctx.translate(offsetX, offsetY)
 plotSquares(ctx)