03 & 04

2019/sketch_190903c/sketch_190903c.pyde

@@ -0,0 +1,60 @@
+
+def setup():
+    size(500, 500)
+    strokeWeight(3)
+    setup_sorteio()
+    
+def setup_sorteio():
+    global iniciais, finais
+    iniciais = sorteia_linhas(10)
+    finais = sorteia_linhas(10)
+    
+def sorteia_linhas(num):
+    linhas = []
+    for _ in range(num):
+        margem = 50
+        x1 = random(margem, width - margem)
+        y1 = random(margem, height - margem)
+        x2 = random(margem, width - margem)
+        y2 = random(margem, height - margem)
+        linha = (x1, y1, x2, y2)
+        linhas.append(linha)
+    return linhas 
+
+def draw():
+    background(255)
+    t = map(mouseX, 0, width, 0, 1)
+    for li, lf in zip(iniciais, finais):
+        l = [lerp (a, b, t) for a, b in zip(li, lf)]
+        seta(*l)
+
+def go():
+    for i, li in enumerate(iniciais):
+        x1, y1, x2, y2 = li
+        a = atan2(x2 - x1, y1 - y2)
+        v = PVector.fromAngle(a - HALF_PI) * 10
+        iniciais[i] = (x1 + v.x, y1 + v.y,
+                       x2 + v.x, y2 + v.y)
+        
+        
+
+def seta(x1, y1, x2, y2):
+    L = dist(x1, y1, x2, y2)
+    angle = atan2(x1 - x2, y2 - y1)
+    pushMatrix()
+    translate(x1, y1)
+    rotate(angle)
+    line(0, 0, 0, L)
+    l = L / 10
+    line(0, L, 0 - l, L - l)
+    line(0, L, 0 + l, L - l)
+    popMatrix()
+    
+def keyPressed():
+    if key == " ":
+        setup_sorteio()
+    if keyCode == UP:
+        go()
+    if key == "s":
+        saveFrame("####.png")
+        

2019/sketch_190904c/sketch_190904c.pyde

@@ -0,0 +1,66 @@
+
+def setup():
+    size(500, 500)
+    strokeWeight(3)
+    setup_sorteio()
+
+def setup_sorteio():
+    global iniciais, finais
+    iniciais = sorteia_linhas(10)
+    finais = sorteia_linhas(10)
+
+def sorteia_linhas(num):
+    linhas = []
+    for _ in range(num):
+        margem = 50
+        x1 = random(margem, width - margem)
+        y1 = random(margem, height - margem)
+        x2 = random(margem, width - margem)
+        y2 = random(margem, height - margem)
+        linha = (x1, y1, x2, y2)
+        linhas.append(linha)
+    return linhas
+
+def draw():
+    background(255)
+    t = 1 + sin(frameCount / 100.)
+    for li, lf in zip(iniciais, finais):
+        l = [lerp(a, b, t) for a, b in zip(li, lf)]
+        seta(*l)
+    move(iniciais)
+    move(finais)
+
+def move(l):
+    for i, li in enumerate(l):
+        x1, y1, x2, y2 = li
+        a = atan2(x2 - x1, y1 - y2)
+        d = dist(x2, y2, width/2, height/2)
+        if d > width: 
+            step = -width
+        else:
+            step = 1
+        v = PVector.fromAngle(a - HALF_PI) * step
+        l[i] = (x1 + v.x, y1 + v.y,
+                x2 + v.x, y2 + v.y)
+
+def seta(x1, y1, x2, y2):
+    L = dist(x1, y1, x2, y2)
+    angle = atan2(x1 - x2, y2 - y1)
+    pushMatrix()
+    translate(x1, y1)
+    rotate(angle)
+    l = L / 10.
+    strokeWeight(1 + l / 5.)
+    line(0, 0, 0, L)
+    line(0, L, 0 - l, L - l)
+    line(0, L, 0 + l, L - l)
+    popMatrix()
+
+def keyPressed():
+    if key == " ":
+        setup_sorteio()
+    if keyCode == UP:
+        move(iniciais)
+        move(finais)
+    if key == "s":
+        saveFrame("####.png")