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2019/sketch_190822c/sketch_190822c.pyde

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+add_library('pdf')
+linhas = []
+divisoes = 5
+salvar_pdf = False
+ponto_clique = []
+
+def setup():
+    size(500, 500)
+
+def draw():
+    if salvar_pdf:
+        beginRecord(PDF, "####.pdf")
+
+    stroke(255)  # traço branco
+    strokeWeight(10)  # espessura do traço ("peso")
+    mh, mv = width / 2, height / 2
+    translate(mh, mv)
+    background(0, 128, 32)  # verde (mude a sua cor!)
+
+    for num in range(divisoes):
+        rotate(radians(360. / divisoes))
+        for linha in linhas:
+            x1, y1, x2, y2 = linha
+            line(x1 - mh, y1 - mv, x2 - mh, y2 - mv)
+            scale(1, -1)
+            line(x1 - mh, y1 - mv, x2 - mh, y2 - mv)
+            scale(1, -1)
+
+    if salvar_pdf:
+        endRecord()
+        global salvar_pdf
+        salvar_pdf = False
+
+    if ponto_clique:
+        for num in range(divisoes):
+            rotate(radians(360 / divisoes))
+            line(ponto_clique[0] - mh, ponto_clique[1] - mv,
+                 mouseX - mh, mouseY - mv)
+            scale(1, -1)
+            line(ponto_clique[0] - mh, ponto_clique[1] - mv,
+                 mouseX - mh, mouseY - mv)
+            scale(1, -1)
+
+def mousePressed():  # def mouseDragged():
+    if ponto_clique:
+        px, py = ponto_clique
+        linhas.append((px, py, mouseX, mouseY))
+    if mouseButton == LEFT:
+        ponto_clique[:] = mouseX, mouseY
+    elif mouseButton == RIGHT:
+        ponto_clique[:] = []
+
+def keyPressed():
+    global salvar_pdf, divisoes
+
+    if key == "a":
+        linhas[:] = []  # esvazia lista de linhas
+        ponto_clique[:] = []
+    if key == "g":
+        saveFrame("#####.png")
+        print("salvando PNG")
+    if key == "p":
+        salvar_pdf = True
+        print("salvando PDF")
+    if key == BACKSPACE and linhas:
+        linhas.pop()
+    if key == "-" and divisoes > 2:
+        divisoes -= 1
+    if key == "+" or key == "=":
+        divisoes += 1        
+