day 28

README.md

@@ -8,6 +8,13 @@ If you enjoy this, make a small donation [here](https://www.paypal.com/cgi-bin/w
 
 ----
 
+![28c](sketch_180128c/sketch_180128c.png)
+
+028: [sketch_180128c](https://github.com/villares/sketch-a-day/tree/master/sketch_180128c)  [[Py.Processing](https://villares.github.io/como-instalar-o-processing-modo-python/index-EN)]
+Like 27 but on grayscale
+
+----
+
 ![27c](sketch_180127c/sketch_180127c.png)
 
 027: [sketch_180127c](https://github.com/villares/sketch-a-day/tree/master/sketch_180127c)  [[Py.Processing](https://villares.github.io/como-instalar-o-processing-modo-python/index-EN)][YouTube](https://www.youtube.com/watch?v=A-rqkru79Dw)

sketch_180128c/sketch.properties

@@ -0,0 +1,2 @@
+mode=Python
+mode.id=jycessing.mode.PythonMode

sketch_180128c/sketch_180128c.pyde

@@ -0,0 +1,32 @@
+"""
+s18028c - Alexandre B A Villares
+https://abav.lugaralgum.com/sketch-a-day
+
+Drag the mouse over the canvas to draw
+the 'brush' varies with mouse speed.
+"""
+
+speed = [0, 0]
+LIST = []
+
+def setup():
+    size(500, 500)
+    colorMode(HSB)
+
+def draw():
+    background(100)
+    for i, (w, x, y, px, py) in enumerate(LIST):
+        c = map(w, 0, 10, 0, 255) # maps 1 to 10 to 0 to 255 scale
+        stroke(abs(255 - (c + frameCount) % 511)) # circle colors
+        strokeWeight(abs(w))
+        line(x, y, px, py)
+            
+    x, y, px, py = mouseX, mouseY, pmouseX, pmouseY
+    speed[0] = (dist(x, y, px, py))**0.5 # squareroot of dist to previous mouse pos
+    w = ((10 - speed[0]) + (10 - speed[1]))/2 # mean of 10 minus speed & previous
+    if mousePressed:
+        LIST.append((w, x, y, px, py))
+    speed[1] = speed[0] # updates previous speed
+
+def keyPressed():
+    LIST[:] = []